From 65698acc9cec0b1dee5ded9c56d4988f283d0fdb Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Tue, 16 Feb 2021 18:30:40 +0000 Subject: [PATCH 1/7] First node rotator commit --- api/api.go | 62 ++++ api/common.go | 18 + api/context.go | 18 + api/handler.go | 34 ++ cmd/rotator/logger.go | 28 ++ cmd/rotator/main.go | 31 ++ cmd/rotator/rotator.go | 77 ++++ cmd/rotator/server.go | 84 +++++ go.mod | 20 + go.sum | 641 ++++++++++++++++++++++++++++++++ model/client.go | 74 ++++ model/cluster.go | 29 ++ model/id.go | 34 ++ model/node.go | 23 ++ model/rotate_request.go | 50 +++ rotator/aws_helpers.go | 156 ++++++++ rotator/drain.go | 788 ++++++++++++++++++++++++++++++++++++++++ rotator/helpers.go | 61 ++++ rotator/kube_helpers.go | 135 +++++++ rotator/logger.go | 28 ++ rotator/rotator.go | 211 +++++++++++ 21 files changed, 2602 insertions(+) create mode 100644 api/api.go create mode 100644 api/common.go create mode 100644 api/context.go create mode 100644 api/handler.go create mode 100644 cmd/rotator/logger.go create mode 100644 cmd/rotator/main.go create mode 100644 cmd/rotator/rotator.go create mode 100644 cmd/rotator/server.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 model/client.go create mode 100644 model/cluster.go create mode 100644 model/id.go create mode 100644 model/node.go create mode 100644 model/rotate_request.go create mode 100644 rotator/aws_helpers.go create mode 100644 rotator/drain.go create mode 100644 rotator/helpers.go create mode 100644 rotator/kube_helpers.go create mode 100644 rotator/logger.go create mode 100644 rotator/rotator.go diff --git a/api/api.go b/api/api.go new file mode 100644 index 0000000..ed4d00f --- /dev/null +++ b/api/api.go @@ -0,0 +1,62 @@ +package api + +import ( + "net/http" + + "github.com/gorilla/mux" + "github.com/mattermost/node-rotator/model" + rotator "github.com/mattermost/node-rotator/rotator" +) + +// Register registers the API endpoints on the given router. +func Register(rootRouter *mux.Router, context *Context) { + apiRouter := rootRouter.PathPrefix("/api").Subrouter() + + initCluster(apiRouter, context) +} + +// initCluster registers RDS cluster endpoints on the given router. +func initCluster(apiRouter *mux.Router, context *Context) { + addContext := func(handler contextHandlerFunc) *contextHandler { + return newContextHandler(context, handler) + } + + clustersRouter := apiRouter.PathPrefix("/rotate").Subrouter() + clustersRouter.Handle("", addContext(handleRotateCluster)).Methods("POST") +} + +// handleRotateCluster responds to POST /api/rotate, beginning the process of creating a new RDS Aurora cluster. +// sample body: +// { +// "clusterID": "12345678", +// "maxScaling": 2, +// "rotateMasters": true, +// "rotateWorkers": true, +// "maxDrainRetries": 10, +// "EvictGracePeriod": 60, +// "WaitBetweenRotations": 60, +// } +func handleRotateCluster(c *Context, w http.ResponseWriter, r *http.Request) { + rotateClusterRequest, err := model.NewRotateClusterRequestFromReader(r.Body) + if err != nil { + c.Logger.WithError(err).Error("failed to decode request") + w.WriteHeader(http.StatusBadRequest) + return + } + + cluster := model.Cluster{ + ClusterID: rotateClusterRequest.ClusterID, + MaxScaling: rotateClusterRequest.MaxScaling, + RotateMasters: rotateClusterRequest.RotateMasters, + RotateWorkers: rotateClusterRequest.RotateWorkers, + MaxDrainRetries: rotateClusterRequest.MaxDrainRetries, + EvictGracePeriod: rotateClusterRequest.EvictGracePeriod, + WaitBetweenRotations: rotateClusterRequest.WaitBetweenRotations, + } + + go rotator.InitRotateCluster(&cluster) + + w.Header().Set("Content-Type", "application/json") + w.WriteHeader(http.StatusAccepted) + outputJSON(c, w, cluster) +} diff --git a/api/common.go b/api/common.go new file mode 100644 index 0000000..c21737e --- /dev/null +++ b/api/common.go @@ -0,0 +1,18 @@ +package api + +import ( + "encoding/json" + "io" +) + +// outputJSON is a helper method to write the given data as JSON to the given writer. +// +// It only logs an error if one occurs, rather than returning, since there is no point in trying +// to send a new status code back to the client once the body has started sending. +func outputJSON(c *Context, w io.Writer, data interface{}) { + encoder := json.NewEncoder(w) + err := encoder.Encode(data) + if err != nil { + c.Logger.WithError(err).Error("failed to encode result") + } +} diff --git a/api/context.go b/api/context.go new file mode 100644 index 0000000..fe6bac8 --- /dev/null +++ b/api/context.go @@ -0,0 +1,18 @@ +package api + +import "github.com/sirupsen/logrus" + +// Context provides the API with all necessary data and interfaces for responding to requests. +// +// It is cloned before each request, allowing per-request changes such as logger annotations. +type Context struct { + RequestID string + Logger logrus.FieldLogger +} + +// Clone creates a shallow copy of context, allowing clones to apply per-request changes. +func (c *Context) Clone() *Context { + return &Context{ + Logger: c.Logger, + } +} diff --git a/api/handler.go b/api/handler.go new file mode 100644 index 0000000..9b1f09d --- /dev/null +++ b/api/handler.go @@ -0,0 +1,34 @@ +package api + +import ( + "net/http" + + "github.com/mattermost/node-rotator/model" + log "github.com/sirupsen/logrus" +) + +type contextHandlerFunc func(c *Context, w http.ResponseWriter, r *http.Request) + +type contextHandler struct { + context *Context + handler contextHandlerFunc +} + +// ServeHTTP gets the http Request +func (h contextHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { + context := h.context.Clone() + context.RequestID = model.NewID() + context.Logger = context.Logger.WithFields(log.Fields{ + "path": r.URL.Path, + "request": context.RequestID, + }) + + h.handler(context, w, r) +} + +func newContextHandler(context *Context, handler contextHandlerFunc) *contextHandler { + return &contextHandler{ + context: context, + handler: handler, + } +} diff --git a/cmd/rotator/logger.go b/cmd/rotator/logger.go new file mode 100644 index 0000000..511729c --- /dev/null +++ b/cmd/rotator/logger.go @@ -0,0 +1,28 @@ +package main + +import ( + log "github.com/sirupsen/logrus" +) + +var logger *log.Logger + +func init() { + logger = log.New() + logger.SetFormatter(&log.TextFormatter{ + FullTimestamp: true, + }) +} + +type logrusWriter struct { + logger log.FieldLogger +} + +func (w *logrusWriter) Write(b []byte) (int, error) { + n := len(b) + if n > 0 && b[n-1] == '\n' { + b = b[:n-1] + } + + w.logger.Warning(string(b)) + return n, nil +} diff --git a/cmd/rotator/main.go b/cmd/rotator/main.go new file mode 100644 index 0000000..b618d73 --- /dev/null +++ b/cmd/rotator/main.go @@ -0,0 +1,31 @@ +// Package main is the entry point to the Mattermost Node Rotator server and CLI. +package main + +import ( + "os" + + "github.com/spf13/cobra" +) + +var rootCmd = &cobra.Command{ + Use: "rotator", + Short: "Node Rotator is a tool to rotate K8s cluster nodes", + Run: func(cmd *cobra.Command, args []string) { + serverCmd.RunE(cmd, args) + }, + // SilenceErrors allows us to explicitly log the error returned from rootCmd below. + SilenceErrors: true, +} + +func init() { + rootCmd.AddCommand(serverCmd) + rootCmd.AddCommand(clusterCmd) + rootCmd.AddCommand(nodeCmd) +} + +func main() { + if err := rootCmd.Execute(); err != nil { + logger.WithError(err).Error("command failed") + os.Exit(1) + } +} diff --git a/cmd/rotator/rotator.go b/cmd/rotator/rotator.go new file mode 100644 index 0000000..9add34c --- /dev/null +++ b/cmd/rotator/rotator.go @@ -0,0 +1,77 @@ +package main + +import ( + "encoding/json" + "os" + + "github.com/mattermost/node-rotator/model" + "github.com/pkg/errors" + "github.com/spf13/cobra" +) + +func init() { + clusterCmd.PersistentFlags().String("server", "http://localhost:8079", "The Node Rotator server whose API will be queried.") + + rotatorCmd.Flags().String("cluster", "", "the cluster ID of the cluster to go through node rotation") + rotatorCmd.Flags().Int64("max-scaling", 1, "the max number of nodes rotating in parallel") + rotatorCmd.Flags().Bool("rotate-masters", false, "if disabled, master nodes will not be rotated") + rotatorCmd.Flags().Bool("rotate-workers", false, "if disabled, worker nodes will not be rotated") + rotatorCmd.Flags().Int64("max-drain-retries", 10, "the max number of retries when drain fails") + rotatorCmd.Flags().Int64("evict-grace-period", 60, "the pod eviction grace period") + rotatorCmd.Flags().Int64("wait-between-rotations", 60, "the time in seconds between each node rotation") + + clusterCmd.AddCommand(rotatorCmd) +} + +var clusterCmd = &cobra.Command{ + Use: "cluster", + Short: "Rotate cluster nodes by the node rotator server.", +} + +var nodeCmd = &cobra.Command{ + Use: "node", + Short: "Handle node changees, drain, detach, terminate, etc.", +} + +var rotatorCmd = &cobra.Command{ + Use: "rotate", + Short: "Rotate nodes of a k8s cluster.", + RunE: func(command *cobra.Command, args []string) error { + command.SilenceUsage = true + serverAddress, _ := command.Flags().GetString("server") + client := model.NewClient(serverAddress) + + clusterID, _ := command.Flags().GetString("cluster") + maxScaling, _ := command.Flags().GetInt64("max-scaling") + rotateMasters, _ := command.Flags().GetBool("rotate-masters") + rotateWorkers, _ := command.Flags().GetBool("rotate-workers") + maxDrainRetries, _ := command.Flags().GetInt64("max-drain-retries") + evictGracePeriod, _ := command.Flags().GetInt64("evict-grace-period") + waitBetweenRotations, _ := command.Flags().GetInt64("wait-between-rotations") + + rotator, err := client.RotateCluster(&model.RotateClusterRequest{ + ClusterID: clusterID, + MaxScaling: maxScaling, + RotateMasters: rotateMasters, + RotateWorkers: rotateWorkers, + MaxDrainRetries: maxDrainRetries, + EvictGracePeriod: evictGracePeriod, + WaitBetweenRotations: waitBetweenRotations, + }) + if err != nil { + return errors.Wrap(err, "failed to rotate nodes of the k8s cluster") + } + err = printJSON(rotator) + if err != nil { + return err + } + + return nil + }, +} + +func printJSON(data interface{}) error { + encoder := json.NewEncoder(os.Stdout) + encoder.SetIndent("", " ") + return encoder.Encode(data) +} diff --git a/cmd/rotator/server.go b/cmd/rotator/server.go new file mode 100644 index 0000000..c662ac1 --- /dev/null +++ b/cmd/rotator/server.go @@ -0,0 +1,84 @@ +package main + +import ( + "context" + "log" + "net/http" + "os" + "os/signal" + "time" + + "github.com/gorilla/mux" + "github.com/mattermost/node-rotator/api" + "github.com/mattermost/node-rotator/model" + "github.com/sirupsen/logrus" + + "github.com/spf13/cobra" +) + +var instanceID string + +var serverCmd = &cobra.Command{ + Use: "server", + Short: "Runs the node rotaror API server", + RunE: serverCmdF, +} + +func init() { + instanceID = model.NewID() + + serverCmd.PersistentFlags().String("listen", ":8079", "The interface and port on which to listen.") + serverCmd.PersistentFlags().Bool("debug", false, "Whether to output debug logs.") +} + +func serverCmdF(command *cobra.Command, args []string) error { + command.SilenceUsage = true + + debug, _ := command.Flags().GetBool("debug") + if debug { + logger.SetLevel(logrus.DebugLevel) + } + + logger := logger.WithField("instance", instanceID) + logger.Info("Starting Mattermost Node Rotator Server") + + router := mux.NewRouter() + + api.Register(router, &api.Context{ + Logger: logger, + }) + + listen, _ := command.Flags().GetString("listen") + srv := &http.Server{ + Addr: listen, + Handler: router, + ReadTimeout: 180 * time.Second, + WriteTimeout: 180 * time.Second, + IdleTimeout: time.Second * 180, + MaxHeaderBytes: 1 << 20, + ErrorLog: log.New(&logrusWriter{logger}, "", 0), + } + + go func() { + logger.WithField("addr", srv.Addr).Info("Listening") + err := srv.ListenAndServe() + if err != nil && err != http.ErrServerClosed { + logger.WithError(err).Error("Failed to listen and serve") + } + }() + + c := make(chan os.Signal, 1) + // We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C) + // SIGKILL, SIGQUIT or SIGTERM (Ctrl+/) will not be caught. + signal.Notify(c, os.Interrupt) + + // Block until we receive our signal. + <-c + logger.Info("Shutting down") + + ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second) + defer cancel() + srv.Shutdown(ctx) + + return nil +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..a63af78 --- /dev/null +++ b/go.mod @@ -0,0 +1,20 @@ +module github.com/mattermost/node-rotator + +go 1.15 + +require ( + github.com/aws/aws-sdk-go v1.36.7 + github.com/googleapis/gnostic v0.5.3 // indirect + github.com/gorilla/mux v1.8.0 + github.com/imdario/mergo v0.3.11 // indirect + github.com/pborman/uuid v1.2.1 + github.com/pkg/errors v0.9.1 + github.com/sirupsen/logrus v1.7.0 + github.com/spf13/cobra v1.1.1 + golang.org/x/oauth2 v0.0.0-20201208152858-08078c50e5b5 // indirect + golang.org/x/time v0.0.0-20201208040808-7e3f01d25324 // indirect + k8s.io/api v0.19.2 + k8s.io/apimachinery v0.19.2 + k8s.io/client-go v0.19.2 + k8s.io/utils v0.0.0-20201110183641-67b214c5f920 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..0ec0f1c --- /dev/null +++ b/go.sum @@ -0,0 +1,641 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go 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programmatic interface to the provisioning server API. +type Client struct { + address string + headers map[string]string + httpClient *http.Client +} + +// NewClient creates a client to the provisioning server at the given address. +func NewClient(address string) *Client { + return &Client{ + address: address, + headers: make(map[string]string), + httpClient: &http.Client{}, + } +} + +// closeBody ensures the Body of an http.Response is properly closed. +func closeBody(r *http.Response) { + if r.Body != nil { + _, _ = ioutil.ReadAll(r.Body) + _ = r.Body.Close() + } +} + +func (c *Client) buildURL(urlPath string, args ...interface{}) string { + return fmt.Sprintf("%s%s", c.address, fmt.Sprintf(urlPath, args...)) +} + +func (c *Client) doPost(u string, request interface{}) (*http.Response, error) { + requestBytes, err := json.Marshal(request) + if err != nil { + return nil, errors.Wrap(err, "failed to marshal request") + } + + req, err := http.NewRequest(http.MethodPost, u, bytes.NewReader(requestBytes)) + if err != nil { + return nil, errors.Wrap(err, "failed to create http request") + } + for k, v := range c.headers { + req.Header.Add(k, v) + } + req.Header.Set("Content-Type", "application/json") + + return c.httpClient.Do(req) +} + +// RotateCluster requests the rotation of a K8s cluster from the rotator server. +func (c *Client) RotateCluster(request *RotateClusterRequest) (*Cluster, error) { + resp, err := c.doPost(c.buildURL("/api/rotate"), request) + if err != nil { + return nil, err + } + defer closeBody(resp) + + switch resp.StatusCode { + case http.StatusAccepted: + return ClusterFromReader(resp.Body) + + default: + return nil, errors.Errorf("failed with status code %d", resp.StatusCode) + } +} diff --git a/model/cluster.go b/model/cluster.go new file mode 100644 index 0000000..be4afbb --- /dev/null +++ b/model/cluster.go @@ -0,0 +1,29 @@ +package model + +import ( + "encoding/json" + "io" +) + +// Cluster represents a K8s cluster. +type Cluster struct { + ClusterID string + MaxScaling int64 + RotateMasters bool + RotateWorkers bool + MaxDrainRetries int64 + EvictGracePeriod int64 + WaitBetweenRotations int64 +} + +// ClusterFromReader decodes a json-encoded cluster from the given io.Reader. +func ClusterFromReader(reader io.Reader) (*Cluster, error) { + cluster := Cluster{} + decoder := json.NewDecoder(reader) + err := decoder.Decode(&cluster) + if err != nil && err != io.EOF { + return nil, err + } + + return &cluster, nil +} diff --git a/model/id.go b/model/id.go new file mode 100644 index 0000000..3135d02 --- /dev/null +++ b/model/id.go @@ -0,0 +1,34 @@ +package model + +import ( + "bytes" + "encoding/base32" + "math/rand" + "time" + + "github.com/pborman/uuid" +) + +var encoding = base32.NewEncoding("ybndrfg8ejkmcpqxot1uwisza345h769") +var seededRand *rand.Rand = rand.New(rand.NewSource(time.Now().UnixNano())) + +// NewID is a globally unique identifier. It is a [A-Z0-9] string 26 +// characters long. It is a UUID version 4 Guid that is zbased32 encoded +// with the padding stripped off. +func NewID() string { + var b bytes.Buffer + encoder := base32.NewEncoder(encoding, &b) + encoder.Write(uuid.NewRandom()) + encoder.Close() + b.Truncate(26) // removes the '==' padding + return b.String() +} + +// StringWithCharset is returning a random string based on a given string. +func StringWithCharset(length int, charset string) string { + b := make([]byte, length) + for i := range b { + b[i] = charset[seededRand.Intn(len(charset))] + } + return string(b) +} diff --git a/model/node.go b/model/node.go new file mode 100644 index 0000000..46c2554 --- /dev/null +++ b/model/node.go @@ -0,0 +1,23 @@ +package model + +import ( + "encoding/json" + "io" +) + +// Node represents a K8s node. +type Node struct { + NodeName string +} + +// NodeFromReader decodes a json-encoded node from the given io.Reader. +func NodeFromReader(reader io.Reader) (*Node, error) { + node := Node{} + decoder := json.NewDecoder(reader) + err := decoder.Decode(&node) + if err != nil && err != io.EOF { + return nil, err + } + + return &node, nil +} diff --git a/model/rotate_request.go b/model/rotate_request.go new file mode 100644 index 0000000..2084646 --- /dev/null +++ b/model/rotate_request.go @@ -0,0 +1,50 @@ +package model + +import ( + "encoding/json" + "io" + + "github.com/pkg/errors" +) + +// RotateClusterRequest specifies the parameters for a new cluster rotation. +type RotateClusterRequest struct { + ClusterID string `json:"clusterID,omitempty"` + MaxScaling int64 `json:"maxScaling,omitempty"` + RotateMasters bool `json:"rotateMasters,omitempty"` + RotateWorkers bool `json:"rotateWorkers,omitempty"` + MaxDrainRetries int64 `json:"maxDrainRetries,omitempty"` + EvictGracePeriod int64 `json:"evictGracePeriod,omitempty"` + WaitBetweenRotations int64 `json:"waitBetweenRotations,omitempty"` +} + +// NewRotateClusterRequestFromReader decodes the request and returns after validation and setting the defaults. +func NewRotateClusterRequestFromReader(reader io.Reader) (*RotateClusterRequest, error) { + var rotateClusterRequest RotateClusterRequest + err := json.NewDecoder(reader).Decode(&rotateClusterRequest) + if err != nil && err != io.EOF { + return nil, errors.Wrap(err, "failed to decode rotate cluster request") + } + + err = rotateClusterRequest.Validate() + if err != nil { + return nil, errors.Wrap(err, "rotate cluster request failed validation") + } + rotateClusterRequest.SetDefaults() + + return &rotateClusterRequest, nil +} + +// Validate validates the values of a cluster rotate request. +func (request *RotateClusterRequest) Validate() error { + if request.ClusterID == "" { + return errors.Errorf("Cluster ID cannot be empty") + } + + return nil +} + +// SetDefaults sets the default values for a cluster provision request. +func (request *RotateClusterRequest) SetDefaults() { + +} diff --git a/rotator/aws_helpers.go b/rotator/aws_helpers.go new file mode 100644 index 0000000..7808880 --- /dev/null +++ b/rotator/aws_helpers.go @@ -0,0 +1,156 @@ +package rotator + +import ( + "fmt" + "strings" + "time" + + "github.com/aws/aws-sdk-go/aws" + "github.com/aws/aws-sdk-go/aws/session" + "github.com/aws/aws-sdk-go/service/autoscaling" + "github.com/aws/aws-sdk-go/service/ec2" + "github.com/pkg/errors" +) + +func GetNodeHostnames(autoscalingGroupNodes []*autoscaling.Instance) ([]string, error) { + svc := ec2.New(session.New()) + var instanceHostnames []string + for _, node := range autoscalingGroupNodes { + resp, err := svc.DescribeInstances(&ec2.DescribeInstancesInput{ + InstanceIds: []*string{aws.String(*node.InstanceId)}, + }) + if err != nil { + return nil, errors.Wrap(err, "Failed to describe ec2 instance") + } + instanceHostnames = append(instanceHostnames, *resp.Reservations[0].Instances[0].PrivateDnsName) + } + return instanceHostnames, nil +} + +func GetInstanceID(nodeName string) (string, error) { + svc := ec2.New(session.New()) + resp, err := svc.DescribeInstances(&ec2.DescribeInstancesInput{ + Filters: []*ec2.Filter{ + { + Name: aws.String("private-dns-name"), + Values: []*string{aws.String(nodeName)}, + }, + }, + }) + if err != nil { + return "", errors.Wrap(err, "Failed to describe ec2 instance") + } + return *resp.Reservations[0].Instances[0].InstanceId, nil +} + +func DetachNodes(decrement bool, nodesToDetach []string, autoscalingGroupName string) error { + asgSvc := autoscaling.New(session.New()) + + for _, node := range nodesToDetach { + instanceID, err := GetInstanceID(node) + if err != nil { + return errors.Wrapf(err, "Failed to detach and delete node %s", node) + } + + logger.Infof("Detaching instance %s", instanceID) + _, err = asgSvc.DetachInstances(&autoscaling.DetachInstancesInput{ + AutoScalingGroupName: aws.String(autoscalingGroupName), + InstanceIds: []*string{ + aws.String(instanceID), + }, + ShouldDecrementDesiredCapacity: aws.Bool(decrement), + }) + if err != nil { + return errors.Wrapf(err, "Failed to detach instance %s", instanceID) + } + } + + return nil +} + +func TerminateNodes(nodesToTerminate []string) error { + logger.Infof("Terminating %d nodes", len(nodesToTerminate)) + + for _, node := range nodesToTerminate { + instanceID, err := GetInstanceID(node) + if err != nil { + return errors.Wrapf(err, "Failed to detach and delete node %s", node) + } + + logger.Infof("Terminating instance %s", instanceID) + ec2Svc := ec2.New(session.New()) + + _, err = ec2Svc.TerminateInstances(&ec2.TerminateInstancesInput{ + InstanceIds: []*string{ + aws.String(instanceID), + }, + }) + if err != nil { + return errors.Wrapf(err, "Failed to delete instance %s", instanceID) + } + } + + return nil +} + +func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { + svc := autoscaling.New(session.New()) + + var autoscalingGroups []*autoscaling.Group + var nextToken *string + for { + resp, err := svc.DescribeAutoScalingGroups(&autoscaling.DescribeAutoScalingGroupsInput{ + NextToken: nextToken, + }) + if err != nil { + return nil, errors.Wrap(err, "Failed to describe autoscaling groups") + } + for _, asg := range resp.AutoScalingGroups { + for _, tag := range asg.Tags { + if *tag.Key == "KubernetesCluster" && *tag.Value == fmt.Sprintf("%s-kops.k8s.local", clusterID) || *tag.Key == "Name" && strings.Contains(*tag.Value, clusterID) { + autoscalingGroups = append(autoscalingGroups, asg) + break + } + } + } + + if resp.NextToken == nil || *resp.NextToken == "" { + break + } + nextToken = resp.NextToken + } + + return autoscalingGroups, nil +} + +func (autoscalingGroup *AutoscalingGroup) AutoScalingGroupReady() (*autoscaling.Group, error) { + svc := autoscaling.New(session.New()) + timeout := 300 + logger.Infof("Waiting up to %d seconds for load balancer %s to become ready...", timeout, autoscalingGroup.Name) + + timer := time.NewTimer(time.Duration(timeout) * time.Second) + defer timer.Stop() + + for { + select { + case <-timer.C: + return nil, errors.New("timed out waiting for load balancer to become ready") + default: + resp, err := svc.DescribeAutoScalingGroups(&autoscaling.DescribeAutoScalingGroupsInput{ + AutoScalingGroupNames: []*string{ + aws.String(autoscalingGroup.Name), + }, + }) + if err != nil { + return nil, errors.Wrapf(err, "Failed to describe the autoscaling group %s", autoscalingGroup.Name) + } + + if int64(len(resp.AutoScalingGroups[0].Instances)) == autoscalingGroup.DesiredCapacity { + return resp.AutoScalingGroups[0], nil + } + + logger.Info("AutoscalingGroup not updated with new instances, waiting...") + time.Sleep(5 * time.Second) + } + } +} diff --git a/rotator/drain.go b/rotator/drain.go new file mode 100644 index 0000000..3db2c3d --- /dev/null +++ b/rotator/drain.go @@ -0,0 +1,788 @@ +package rotator + +import ( + "context" + "fmt" + "math" + "sort" + "strings" + "time" + + "github.com/pkg/errors" + corev1 "k8s.io/api/core/v1" + policyv1beta1 "k8s.io/api/policy/v1beta1" + apierrors "k8s.io/apimachinery/pkg/api/errors" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/apimachinery/pkg/fields" + "k8s.io/apimachinery/pkg/labels" + "k8s.io/apimachinery/pkg/types" + utilerrors "k8s.io/apimachinery/pkg/util/errors" + "k8s.io/apimachinery/pkg/util/sets" + "k8s.io/apimachinery/pkg/util/wait" + "k8s.io/client-go/kubernetes" + typedappsv1 "k8s.io/client-go/kubernetes/typed/apps/v1" + typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1" + typedpolicyv1beta1 "k8s.io/client-go/kubernetes/typed/policy/v1beta1" +) + +type DrainOptions struct { + // Continue even if there are pods not managed by a ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet. + Force bool + + // Ignore DaemonSet-managed pods. + IgnoreDaemonsets bool + + // Period of time in seconds given to each pod to terminate + // gracefully. If negative, the default value specified in the pod + // will be used. + GracePeriodSeconds int + + // The length of time to wait before giving up on deletion or + // eviction. Zero means infinite. + Timeout time.Duration + + // Continue even if there are pods using emptyDir (local data that + // will be deleted when the node is drained). + DeleteLocalData bool + + // Namespace to filter pods on the node. + Namespace string + + // Label selector to filter pods on the node. + Selector labels.Selector + + // OnPodDeletedOrEvicted is called when a pod is evicted/deleted; for printing progress output + OnPodDeletedOrEvicted func(pod *corev1.Pod, usingEviction bool) + + // SkipWaitForDeleteTimeoutSeconds ignores pods that have a + // DeletionTimeStamp > N seconds. It's up to the user to decide when this + // option is appropriate; examples include the Node is unready and the pods + // won't drain otherwise + SkipWaitForDeleteTimeoutSeconds int +} + +type podDelete struct { + pod corev1.Pod + status podDeleteStatus +} + +type podDeleteStatus struct { + delete bool + reason string + message string +} + +type waitForDeleteParams struct { + ctx context.Context + pods []corev1.Pod + interval time.Duration + timeout time.Duration + usingEviction bool + getPodFn func(string, string) (*corev1.Pod, error) + onDoneFn func(pod *corev1.Pod, usingEviction bool) + globalTimeout time.Duration + skipWaitForDeleteTimeoutSeconds int +} + +// Takes a pod and returns a bool indicating whether or not to operate on the +// pod, an optional warning message, and an optional fatal error. +type podFilter func(corev1.Pod) (include bool, w *warning, f *fatal) +type warning struct { + string +} +type fatal struct { + string +} + +const ( + EvictionKind = "Eviction" + EvictionSubresource = "pods/eviction" + + kDaemonsetFatal = "DaemonSet-managed pods (use IgnoreDaemonsets to ignore)" + kDaemonsetWarning = "Ignoring DaemonSet-managed pods" + kLocalStorageFatal = "Pods with local storage (use DeleteLocalData to override)" + kLocalStorageWarning = "Deleting pods with local storage" + kUnmanagedFatal = "Pods not managed by ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet (use Force to override)" + kUnmanagedWarning = "Deleting pods not managed by ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet" +) + +func Drain(client kubernetes.Interface, nodes []*corev1.Node, options *DrainOptions) (err error) { + nodeInterface := client.CoreV1().Nodes() + for _, node := range nodes { + err := Cordon(nodeInterface, node) + if err != nil { + return err + } + } + + drainedNodes := sets.NewString() + var fatal error + + for _, node := range nodes { + err := DeleteOrEvictPods(client, node, options) + if err == nil { + drainedNodes.Insert(node.Name) + logger.Infof("Drained node %q", node.Name) + } else { + logger.Error(err) + logger.Errorf("Unable to drain node %q", node.Name) + remainingNodes := []string{} + fatal = err + for _, remainingNode := range nodes { + if drainedNodes.Has(remainingNode.Name) { + continue + } + remainingNodes = append(remainingNodes, remainingNode.Name) + } + + if len(remainingNodes) > 0 { + sort.Strings(remainingNodes) + logger.Infof("There are pending nodes to be drained: %s", strings.Join(remainingNodes, ",")) + } + } + } + + return fatal +} + +// DeleteOrEvictPods deletes or (where supported) evicts pods from the +// target node and waits until the deletion/eviction completes, +// Timeout elapses, or an error occurs. +func DeleteOrEvictPods(client kubernetes.Interface, node *corev1.Node, options *DrainOptions) error { + pods, err := getPodsForDeletion(client, node, options) + if err != nil { + return err + } + err = deleteOrEvictPods(client, pods, options) + if err != nil { + pendingPods, newErr := getPodsForDeletion(client, node, options) + if newErr != nil { + return newErr + } + pendingNames := make([]string, len(pendingPods)) + for i, pendingPod := range pendingPods { + pendingNames[i] = pendingPod.Name + } + sort.Strings(pendingNames) + logger.Errorf("Failed to evict pods from node %q (pending pods: %s): %v", node.Name, strings.Join(pendingNames, ","), err) + } + return err +} + +func getPodController(pod corev1.Pod) *metav1.OwnerReference { + return metav1.GetControllerOf(&pod) +} + +func (o *DrainOptions) unreplicatedFilter(pod corev1.Pod) (bool, *warning, *fatal) { + // any finished pod can be removed + if pod.Status.Phase == corev1.PodSucceeded || pod.Status.Phase == corev1.PodFailed { + return true, nil, nil + } + + controllerRef := getPodController(pod) + if controllerRef != nil { + return true, nil, nil + } + if o.Force { + return true, &warning{kUnmanagedWarning}, nil + } + + return false, nil, &fatal{kUnmanagedFatal} +} + +type DaemonSetFilterOptions struct { + client typedappsv1.AppsV1Interface + force bool + ignoreDaemonSets bool +} + +func (o *DaemonSetFilterOptions) daemonSetFilter(pod corev1.Pod) (bool, *warning, *fatal) { + ctx := context.TODO() + + // Note that we return false in cases where the pod is DaemonSet managed, + // regardless of flags. We never delete them, the only question is whether + // their presence constitutes an error. + // + // The exception is for pods that are orphaned (the referencing + // management resource - including DaemonSet - is not found). + // Such pods will be deleted if Force is used. + controllerRef := getPodController(pod) + if controllerRef == nil || controllerRef.Kind != "DaemonSet" { + return true, nil, nil + } + + if _, err := o.client.DaemonSets(pod.Namespace).Get(ctx, controllerRef.Name, metav1.GetOptions{}); err != nil { + // remove orphaned pods with a warning if Force is used + if apierrors.IsNotFound(err) && o.force { + return true, &warning{err.Error()}, nil + } + return false, nil, &fatal{err.Error()} + } + + if !o.ignoreDaemonSets { + return false, nil, &fatal{kDaemonsetFatal} + } + + return false, &warning{kDaemonsetWarning}, nil +} + +func mirrorPodFilter(pod corev1.Pod) (bool, *warning, *fatal) { + if _, found := pod.ObjectMeta.Annotations[corev1.MirrorPodAnnotationKey]; found { + return false, nil, nil + } + return true, nil, nil +} + +func hasLocalStorage(pod corev1.Pod) bool { + for _, volume := range pod.Spec.Volumes { + if volume.EmptyDir != nil { + return true + } + } + + return false +} + +func (o *DrainOptions) localStorageFilter(pod corev1.Pod) (bool, *warning, *fatal) { + if !hasLocalStorage(pod) { + return true, nil, nil + } + if !o.DeleteLocalData { + return false, nil, &fatal{kLocalStorageFatal} + } + return true, &warning{kLocalStorageWarning}, nil +} + +// Map of status message to a list of pod names having that status. +type podStatuses map[string][]string + +func (ps podStatuses) message() string { + msgs := []string{} + + for key, pods := range ps { + msgs = append(msgs, fmt.Sprintf("%s: %s", key, strings.Join(pods, ", "))) + } + return strings.Join(msgs, "; ") +} + +// func getPodsForDeletion(client kubernetes.Interface, nodeName string, options *DrainOptions) (*podDeleteList, []error) { + +// labelSelector, err := labels.Parse(options.Selector.String()) +// if err != nil { +// return nil, []error{err} +// } + +// podList, err := client.CoreV1().Pods(metav1.NamespaceAll).List(context.TODO(), metav1.ListOptions{ +// LabelSelector: labelSelector.String(), +// FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": nodeName}).String()}) +// if err != nil { +// return nil, []error{err} +// } + +// pods := []podDelete{} + +// daemonSetOptions := &DaemonSetFilterOptions{ +// client: client.AppsV1(), +// force: options.Force, +// ignoreDaemonSets: options.IgnoreDaemonsets, +// } + +// for _, pod := range podList.Items { +// var status podDeleteStatus +// for _, filter := range []podFilter{daemonSetOptions.daemonSetFilter, mirrorPodFilter, options.localStorageFilter, options.unreplicatedFilter} { +// status = filter(pod) +// if !status.delete { +// // short-circuit as soon as pod is filtered out +// // at that point, there is no reason to run pod +// // through any additional filters +// break +// } +// } +// // Add the pod to podDeleteList no matter what podDeleteStatus is, +// // those pods whose podDeleteStatus is false like DaemonSet will +// // be catched by list.errors() +// pods = append(pods, podDelete{ +// pod: pod, +// status: status, +// }) +// } + +// list := &podDeleteList{items: pods} + +// if errs := list.errors(); len(errs) > 0 { +// return list, errs +// } + +// return list, nil +// } + +// getPodsForDeletion receives resource info for a node, and returns all the pods from the given node that we +// are planning on deleting. If there are any pods preventing us from deleting, we return that list in an error. +func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options *DrainOptions) (pods []corev1.Pod, err error) { + ctx := context.TODO() + + listOptions := metav1.ListOptions{ + FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": node.Name}).String(), + } + if options.Selector != nil { + listOptions.LabelSelector = options.Selector.String() + } + podList, err := client.CoreV1().Pods(options.Namespace).List(ctx, listOptions) + if err != nil { + return pods, err + } + + ws := podStatuses{} + fs := podStatuses{} + + daemonSetOptions := &DaemonSetFilterOptions{ + client: client.AppsV1(), + force: options.Force, + ignoreDaemonSets: options.IgnoreDaemonsets, + } + + for _, pod := range podList.Items { + podOk := true + for _, filt := range []podFilter{daemonSetOptions.daemonSetFilter, mirrorPodFilter, options.localStorageFilter, options.unreplicatedFilter} { + filterOk, w, f := filt(pod) + + podOk = podOk && filterOk + if w != nil { + ws[w.string] = append(ws[w.string], pod.Name) + } + if f != nil { + fs[f.string] = append(fs[f.string], pod.Name) + } + + // short-circuit as soon as pod not ok + // at that point, there is no reason to run pod + // through any additional filters + if !podOk { + break + } + } + if podOk { + pods = append(pods, pod) + } + } + + if len(fs) > 0 { + return []corev1.Pod{}, errors.New(fs.message()) + } + if len(ws) > 0 { + logger.Info(ws.message()) + } + return pods, nil +} + +func evictPod(client typedpolicyv1beta1.PolicyV1beta1Interface, pod corev1.Pod, policyGroupVersion string, gracePeriodSeconds int) error { + ctx := context.TODO() + + deleteOptions := &metav1.DeleteOptions{} + if gracePeriodSeconds >= 0 { + gracePeriod := int64(gracePeriodSeconds) + deleteOptions.GracePeriodSeconds = &gracePeriod + } + eviction := &policyv1beta1.Eviction{ + TypeMeta: metav1.TypeMeta{ + APIVersion: policyGroupVersion, + Kind: EvictionKind, + }, + ObjectMeta: metav1.ObjectMeta{ + Name: pod.Name, + Namespace: pod.Namespace, + }, + DeleteOptions: deleteOptions, + } + return client.Evictions(eviction.Namespace).Evict(ctx, eviction) +} + +// deleteOrEvictPods deletes or evicts the pods on the api server +func deleteOrEvictPods(client kubernetes.Interface, pods []corev1.Pod, options *DrainOptions) error { + ctx := context.TODO() + + if len(pods) == 0 { + return nil + } + + getPodFn := func(namespace, name string) (*corev1.Pod, error) { + return client.CoreV1().Pods(namespace).Get(ctx, name, metav1.GetOptions{}) + } + + policyGroupVersion, err := SupportEviction(client) + if err != nil { + return err + } + + if len(policyGroupVersion) > 0 { + // Remember to change change the URL manipulation func when Evction's version change + return evictPods(client.PolicyV1beta1(), pods, policyGroupVersion, options, getPodFn) + } + return deletePods(client.CoreV1(), pods, options, getPodFn) +} + +func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.Pod, policyGroupVersion string, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { + returnCh := make(chan error, 1) + // 0 timeout means infinite, we use MaxInt64 to represent it. + var globalTimeout time.Duration + if options.Timeout == 0 { + globalTimeout = time.Duration(math.MaxInt64) + } else { + globalTimeout = options.Timeout * time.Second + } + ctx, cancel := context.WithTimeout(context.Background(), globalTimeout) + defer cancel() + for _, pod := range pods { + go func(pod corev1.Pod, returnCh chan error) { + for { + logger.Infof("Evicting pod %s/%s\n", pod.Namespace, pod.Name) + select { + case <-ctx.Done(): + // return here or we'll leak a goroutine. + returnCh <- fmt.Errorf("error when evicting pod %q: global timeout reached: %v", pod.Name, globalTimeout) + return + default: + } + err := evictPod(client, pod, policyGroupVersion, options.GracePeriodSeconds) + if err == nil { + break + } else if apierrors.IsNotFound(err) { + returnCh <- nil + return + } else if apierrors.IsTooManyRequests(err) { + logger.Errorf("error when evicting pod %q (will retry after 5s): %v\n", pod.Name, err) + time.Sleep(5 * time.Second) + } else { + returnCh <- fmt.Errorf("error when evicting pod %q: %v", pod.Name, err) + return + } + } + logger.Infof("pod %s/%s evicted\n", pod.Namespace, pod.Name) + params := waitForDeleteParams{ + ctx: ctx, + pods: []corev1.Pod{pod}, + interval: 1 * time.Second, + timeout: time.Duration(math.MaxInt64), + usingEviction: true, + getPodFn: getPodFn, + onDoneFn: options.OnPodDeletedOrEvicted, + globalTimeout: globalTimeout, + skipWaitForDeleteTimeoutSeconds: options.SkipWaitForDeleteTimeoutSeconds, + } + _, err := waitForDelete(params) + if err == nil { + returnCh <- nil + } else { + returnCh <- fmt.Errorf("Error when waiting for pod %q terminating: %v", pod.Name, err) + } + }(pod, returnCh) + } + + doneCount := 0 + var errors []error + + numPods := len(pods) + for doneCount < numPods { + select { + case err := <-returnCh: + doneCount++ + if err != nil { + errors = append(errors, err) + } + default: + } + } + + return utilerrors.NewAggregate(errors) +} + +// // EvictPod will evict the give pod, or return an error if it couldn't +// func (d *Helper) EvictPod(pod corev1.Pod, policyGroupVersion string) error { +// if d.DryRunStrategy == cmdutil.DryRunServer { +// if err := d.DryRunVerifier.HasSupport(pod.GroupVersionKind()); err != nil { +// return err +// } +// } + +// delOpts := d.makeDeleteOptions() +// eviction := &policyv1beta1.Eviction{ +// TypeMeta: metav1.TypeMeta{ +// APIVersion: policyGroupVersion, +// Kind: EvictionKind, +// }, +// ObjectMeta: metav1.ObjectMeta{ +// Name: pod.Name, +// Namespace: pod.Namespace, +// }, +// DeleteOptions: &delOpts, +// } + +// // Remember to change change the URL manipulation func when Eviction's version change +// return d.Client.PolicyV1beta1().Evictions(eviction.Namespace).Evict(context.TODO(), eviction) +// } + +// func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.Pod, policyGroupVersion string, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { +// returnCh := make(chan error, 1) +// stopCh := make(chan struct{}) +// var wg sync.WaitGroup + +// for _, pod := range pods { +// logger.Infof("Evicting pod %s", pod.Name) +// wg.Add(1) +// go func(pod corev1.Pod, returnCh chan error, stopCh chan struct{}) { +// defer wg.Done() +// var err error +// for { +// err = evictPod(client, pod, policyGroupVersion, options.GracePeriodSeconds) +// if err == nil { +// break +// } else if apierrors.IsNotFound(err) { +// returnCh <- nil +// return +// } else if apierrors.IsTooManyRequests(err) { +// select { +// case <-stopCh: +// logger.Infof("Received channel close for pod %q. Returning!!!", pod.Name) +// return +// default: +// logger.Infof("error when evicting pod %q (will retry after 5s): %v", pod.Name, err) +// time.Sleep(5 * time.Second) +// } +// } else { +// returnCh <- fmt.Errorf("error when evicting pod %q: %v", pod.Name, err) +// return +// } +// } +// podArray := []corev1.Pod{pod} +// _, err = waitForDelete(podArray, 1*time.Second, time.Duration(math.MaxInt64), true, getPodFn) +// logger.Infof("Pod %s deleted", pod.Name) +// if err == nil { +// returnCh <- nil +// } else { +// returnCh <- fmt.Errorf("error when waiting for pod %q to terminate: %v", pod.Name, err) +// } +// }(pod, returnCh, stopCh) +// } +// logger.Info("next step") + +// doneCount := 0 +// var errors []error + +// // 0 timeout means infinite, we use MaxInt64 to represent it. +// var globalTimeout time.Duration +// if options.Timeout == 0 { +// globalTimeout = time.Duration(math.MaxInt64) +// } else { +// globalTimeout = options.Timeout +// } +// globalTimeoutCh := time.After(globalTimeout) +// numPods := len(pods) +// for doneCount < numPods { +// select { +// case err := <-returnCh: +// logger.Info("next step 2") +// doneCount++ +// if err != nil { +// errors = append(errors, err) +// } +// case <-globalTimeoutCh: +// logger.Info("Closing stopCh") +// close(stopCh) +// wg.Wait() +// return fmt.Errorf("Drain did not complete within %v", globalTimeout) +// } +// } +// logger.Info("next step 3") +// close(stopCh) +// wg.Wait() +// return utilerrors.NewAggregate(errors) +// } + +func deletePods(client typedcorev1.CoreV1Interface, pods []corev1.Pod, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { + // 0 timeout means infinite, we use MaxInt64 to represent it. + var globalTimeout time.Duration + if options.Timeout == 0 { + globalTimeout = time.Duration(math.MaxInt64) + } else { + globalTimeout = options.Timeout * time.Second + } + for _, pod := range pods { + err := DeletePod(client, pod) + if err != nil && !apierrors.IsNotFound(err) { + return err + } + } + + ctx := context.Background() + params := waitForDeleteParams{ + ctx: ctx, + pods: pods, + interval: 1 * time.Second, + timeout: globalTimeout, + usingEviction: false, + getPodFn: getPodFn, + onDoneFn: options.OnPodDeletedOrEvicted, + globalTimeout: globalTimeout, + skipWaitForDeleteTimeoutSeconds: options.SkipWaitForDeleteTimeoutSeconds, + } + _, err := waitForDelete(params) + return err +} + +// DeletePod will delete the given pod, or return an error if it couldn't +func DeletePod(client typedcorev1.CoreV1Interface, pod corev1.Pod) error { + return client.Pods(pod.Namespace).Delete(context.TODO(), pod.Name, metav1.DeleteOptions{}) +} + +// func deletePods(client typedcorev1.CoreV1Interface, pods []corev1.Pod, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { +// // 0 timeout means infinite, we use MaxInt64 to represent it. +// ctx := context.TODO() + +// var globalTimeout time.Duration +// if options.Timeout == 0 { +// globalTimeout = time.Duration(math.MaxInt64) +// } else { +// globalTimeout = options.Timeout +// } +// deleteOptions := &metav1.DeleteOptions{} +// if options.GracePeriodSeconds >= 0 { +// gracePeriodSeconds := int64(options.GracePeriodSeconds) +// deleteOptions.GracePeriodSeconds = &gracePeriodSeconds +// } +// for _, pod := range pods { +// err := client.Pods(pod.Namespace).Delete(ctx, pod.Name, *deleteOptions) +// if err != nil && !apierrors.IsNotFound(err) { +// return err +// } +// } +// _, err := waitForDelete(pods, 1*time.Second, globalTimeout, false, getPodFn) +// return err +// } + +func waitForDelete(params waitForDeleteParams) ([]corev1.Pod, error) { + pods := params.pods + err := wait.PollImmediate(params.interval, params.timeout, func() (bool, error) { + pendingPods := []corev1.Pod{} + for i, pod := range pods { + p, err := params.getPodFn(pod.Namespace, pod.Name) + if apierrors.IsNotFound(err) || (p != nil && p.ObjectMeta.UID != pod.ObjectMeta.UID) { + if params.onDoneFn != nil { + params.onDoneFn(&pod, params.usingEviction) + } + continue + } else if err != nil { + return false, err + } else { + // if shouldSkipPod(*p, params.skipWaitForDeleteTimeoutSeconds) { + // continue + // } + pendingPods = append(pendingPods, pods[i]) + } + } + pods = pendingPods + if len(pendingPods) > 0 { + select { + case <-params.ctx.Done(): + return false, fmt.Errorf("Global timeout reached: %v", params.globalTimeout) + default: + return false, nil + } + } + return true, nil + }) + return pods, err +} + +// func waitForDelete(pods []corev1.Pod, interval, timeout time.Duration, usingEviction bool, getPodFn func(string, string) (*corev1.Pod, error)) ([]corev1.Pod, error) { +// var verbStr string +// if usingEviction { +// verbStr = "evicted" +// } else { +// verbStr = "deleted" +// } + +// err := wait.PollImmediate(interval, timeout, func() (bool, error) { +// pendingPods := []corev1.Pod{} +// for i, pod := range pods { +// logger.Infof("removing pod %q", pod.Name) +// p, err := getPodFn(pod.Namespace, pod.Name) +// if apierrors.IsNotFound(err) || (p != nil && p.ObjectMeta.UID != pod.ObjectMeta.UID) { +// logger.Infof("pod %q removed (%s)", pod.Name, verbStr) +// continue +// } else if err != nil { +// return false, err +// } else { +// pendingPods = append(pendingPods, pods[i]) +// } +// } +// pods = pendingPods +// if len(pendingPods) > 0 { +// return false, nil +// } +// return true, nil +// }) +// return pods, err +// } + +// SupportEviction uses Discovery API to find out if the server +// supports the eviction subresource. If supported, it will return +// its groupVersion; otherwise it will return an empty string. +func SupportEviction(clientset kubernetes.Interface) (string, error) { + discoveryClient := clientset.Discovery() + groupList, err := discoveryClient.ServerGroups() + if err != nil { + return "", err + } + foundPolicyGroup := false + var policyGroupVersion string + for _, group := range groupList.Groups { + if group.Name == "policy" { + foundPolicyGroup = true + policyGroupVersion = group.PreferredVersion.GroupVersion + break + } + } + if !foundPolicyGroup { + return "", nil + } + resourceList, err := discoveryClient.ServerResourcesForGroupVersion("v1") + if err != nil { + return "", err + } + for _, resource := range resourceList.APIResources { + if resource.Name == EvictionSubresource && resource.Kind == EvictionKind { + return policyGroupVersion, nil + } + } + return "", nil +} + +// Cordon marks a node "Unschedulable". This method is idempotent. +func Cordon(client typedcorev1.NodeInterface, node *corev1.Node) error { + return cordonOrUncordon(client, node, true) +} + +// Uncordon marks a node "Schedulable". This method is idempotent. +func Uncordon(client typedcorev1.NodeInterface, node *corev1.Node) error { + return cordonOrUncordon(client, node, false) +} + +func cordonOrUncordon(client typedcorev1.NodeInterface, node *corev1.Node, desired bool) error { + ctx := context.TODO() + + unsched := node.Spec.Unschedulable + if unsched == desired { + return nil + } + + patch := []byte(fmt.Sprintf("{\"spec\":{\"unschedulable\":%t}}", desired)) + _, err := client.Patch(ctx, node.Name, types.StrategicMergePatchType, patch, metav1.PatchOptions{}) + if err == nil { + verbStr := "cordoned" + if !desired { + verbStr = "un" + verbStr + } + logger.Infof("%s node %q", verbStr, node.Name) + } + return err +} diff --git a/rotator/helpers.go b/rotator/helpers.go new file mode 100644 index 0000000..d7b0e6c --- /dev/null +++ b/rotator/helpers.go @@ -0,0 +1,61 @@ +package rotator + +import ( + "github.com/aws/aws-sdk-go/service/autoscaling" + "github.com/pkg/errors" +) + +func (autoscalingGroup *AutoscalingGroup) newNodes(allNodes []string) []string { + var newNodes []string + for _, node := range allNodes { + for _, oldNode := range autoscalingGroup.Nodes { + if node != oldNode { + newNodes = append(newNodes, node) + } + } + } + return newNodes +} + +func (autoscalingGroup *AutoscalingGroup) setObject(asg *autoscaling.Group) error { + autoscalingGroup.Name = *asg.AutoScalingGroupName + autoscalingGroup.DesiredCapacity = *asg.DesiredCapacity + nodeHostNames, err := GetNodeHostnames(asg.Instances) + if err != nil { + return errors.Wrap(err, "Failed to get asg instance node names and set asg object") + } + autoscalingGroup.Nodes = nodeHostNames + return nil +} + +func (autoscalingGroup *AutoscalingGroup) PopNodes(popNodes []string) { + var updatedList []string + for _, node := range autoscalingGroup.Nodes { + nodeFound := false + for _, popNode := range popNodes { + if popNode == node { + nodeFound = true + break + } + } + if !nodeFound { + updatedList = append(updatedList, node) + } + } + autoscalingGroup.Nodes = updatedList + return +} + +func (autoscalingGroup *AutoscalingGroup) popNode(i int) { + copy(autoscalingGroup.Nodes[i:], autoscalingGroup.Nodes[i+1:]) // Shift a[i+1:] left one index. + autoscalingGroup.Nodes[len(autoscalingGroup.Nodes)-1] = "" // Erase last element (write zero value). + autoscalingGroup.Nodes = autoscalingGroup.Nodes[:len(autoscalingGroup.Nodes)-1] // Truncate slice. +} + +func (autoscalingGroup *AutoscalingGroup) RemoveDeletedNode(nodeToDelete string) { + for i, node := range autoscalingGroup.Nodes { + if node == nodeToDelete { + autoscalingGroup.Nodes = append(autoscalingGroup.Nodes[:i], autoscalingGroup.Nodes[i+1:]...) + } + } +} diff --git a/rotator/kube_helpers.go b/rotator/kube_helpers.go new file mode 100644 index 0000000..646d399 --- /dev/null +++ b/rotator/kube_helpers.go @@ -0,0 +1,135 @@ +package rotator + +import ( + "context" + "os" + "path/filepath" + "time" + + "github.com/pkg/errors" + corev1 "k8s.io/api/core/v1" + k8sErrors "k8s.io/apimachinery/pkg/api/errors" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/tools/clientcmd" +) + +func NodesReady(nodes []string) error { + wait := 600 + logger.Infof("Waiting up to %d seconds for all nodes to become ready...", wait) + for _, node := range nodes { + ctx, cancel := context.WithTimeout(context.Background(), time.Duration(wait)*time.Second) + defer cancel() + node, err := WaitForNodeRunning(ctx, node) + if err != nil { + return errors.Wrapf(err, "Node %s failed to get ready", node) + } + } + logger.Info("All nodes in Ready state") + + return nil +} + +// WaitForNodeRunning will poll a given kubernetes node at a regular interval for +// it to enter the 'Ready' state. If the node fails to become ready before +// the provided timeout then an error will be returned. +func WaitForNodeRunning(ctx context.Context, nodeName string) (*corev1.Node, error) { + clientset, err := getClientSet() + if err != nil { + return nil, errors.Wrap(err, "Failed to get k8s clientset") + } + for { + node, err := clientset.CoreV1().Nodes().Get(ctx, nodeName, metav1.GetOptions{}) + if err == nil { + for _, condition := range node.Status.Conditions { + if condition.Reason == "KubeletReady" && condition.Status == corev1.ConditionTrue { + return node, nil + } else if condition.Reason == "KubeletReady" && condition.Status == corev1.ConditionFalse { + logger.Infof("Node %s found but not ready, waiting...", nodeName) + } + } + } + if err != nil && k8sErrors.IsNotFound(err) { + logger.Infof("Node %s not found, waiting...", nodeName) + } + + select { + case <-ctx.Done(): + return nil, errors.Wrap(ctx.Err(), "timed out waiting for node to become ready") + case <-time.After(20 * time.Second): + } + } +} + +func DrainNodes(nodesToDrain []string, attempts, gracePeriod int) error { + ctx := context.TODO() + + clientset, err := getClientSet() + if err != nil { + return errors.Wrap(err, "Failed to get k8s clientset") + } + + drainOptions := &DrainOptions{ + DeleteLocalData: true, + IgnoreDaemonsets: true, + Timeout: 600, + GracePeriodSeconds: gracePeriod, + } + + logger.Infof("Draining %d nodes", len(nodesToDrain)) + + for _, nodeToDrain := range nodesToDrain { + logger.Infof("Draining node %s", nodeToDrain) + node, err := clientset.CoreV1().Nodes().Get(ctx, nodeToDrain, metav1.GetOptions{}) + if err != nil { + return errors.Wrapf(err, "Failed to get node %s", nodeToDrain) + } + err = Drain(clientset, []*corev1.Node{node}, drainOptions) + if err != nil { + if attempts--; attempts > 0 { + logger.Infof("Node %s drain failed, retrying...", nodeToDrain) + DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod) + } else { + return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) + } + } + logger.Infof("Node %s drained successfully", nodeToDrain) + } + + return nil +} + +func DeleteClusterNodes(nodes []string) error { + ctx := context.TODO() + clientset, err := getClientSet() + if err != nil { + return errors.Wrap(err, "Failed to get k8s clientset") + } + + for _, node := range nodes { + err = clientset.CoreV1().Nodes().Delete(ctx, node, metav1.DeleteOptions{}) + if err != nil { + return err + } + } + return nil +} + +// getClientSet gets the k8s clientset +func getClientSet() (*kubernetes.Clientset, error) { + kubeconfig := filepath.Join( + os.Getenv("HOME"), ".kube", "config", + ) + + config, err := clientcmd.BuildConfigFromFlags("", kubeconfig) + if err != nil { + return nil, err + } + + clientset, err := kubernetes.NewForConfig(config) + if err != nil { + return nil, err + } + + return clientset, nil +} diff --git a/rotator/logger.go b/rotator/logger.go new file mode 100644 index 0000000..aec0ff0 --- /dev/null +++ b/rotator/logger.go @@ -0,0 +1,28 @@ +package rotator + +import ( + log "github.com/sirupsen/logrus" +) + +var logger *log.Logger + +func init() { + logger = log.New() + logger.SetFormatter(&log.TextFormatter{ + FullTimestamp: true, + }) +} + +type logrusWriter struct { + logger log.FieldLogger +} + +func (w *logrusWriter) Write(b []byte) (int, error) { + n := len(b) + if n > 0 && b[n-1] == '\n' { + b = b[:n-1] + } + + w.logger.Warning(string(b)) + return n, nil +} diff --git a/rotator/rotator.go b/rotator/rotator.go new file mode 100644 index 0000000..367d3e8 --- /dev/null +++ b/rotator/rotator.go @@ -0,0 +1,211 @@ +package rotator + +import ( + "strings" + "time" + + "github.com/mattermost/node-rotator/model" + "github.com/pkg/errors" +) + +type AutoscalingGroup struct { + Name string + DesiredCapacity int64 + Nodes []string +} + +// InitRotateCluster is used to call the RotateCluster function. +func InitRotateCluster(cluster *model.Cluster) { + err := RotateCluster(cluster) + if err != nil { + logger.WithError(err).Error("Failed to rotate the cluster nodes") + } +} + +// RotateCluster is used to rotate the Cluster nodes. +func RotateCluster(cluster *model.Cluster) error { + autoscalingGroups, err := GetAutoscalingGroups(cluster.ClusterID) + if err != nil { + return err + } + logger.Infof("Cluster with cluster ID %s is consisted of %d Autoscaling Groups", cluster.ClusterID, len(autoscalingGroups)) + + for _, asg := range autoscalingGroups { + autoscalingGroup := AutoscalingGroup{} + err := autoscalingGroup.setObject(asg) + if err != nil { + return err + } + + if strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateMasters { + logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + + err = autoscalingGroup.masterNodeRotation(cluster) + if err != nil { + return err + } + + logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) + err = autoscalingGroup.finalCheck() + if err != nil { + return err + } + + logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) + } else if !strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateWorkers { + logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + + err = autoscalingGroup.workerNodeRotation(cluster) + if err != nil { + return err + } + + logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) + err = autoscalingGroup.finalCheck() + if err != nil { + return err + } + + logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) + } + } + logger.Info("All ASGs rotated successfully") + return nil +} + +func (autoscalingGroup *AutoscalingGroup) finalCheck() error { + asg, err := autoscalingGroup.AutoScalingGroupReady() + if err != nil { + return errors.Wrap(err, "Failed to get AutoscalingGroup ready") + } + + asgNodes, err := GetNodeHostnames(asg.Instances) + if err != nil { + return errors.Wrap(err, "Failed to get node hostnames") + } + + err = NodesReady(asgNodes) + if err != nil { + return errors.Wrap(err, "Failed to get cluster nodes ready") + } + + return nil +} + +func (autoscalingGroup *AutoscalingGroup) masterNodeRotation(cluster *model.Cluster) error { + for len(autoscalingGroup.Nodes) > 0 { + logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) + + nodesToRotate := []string{autoscalingGroup.Nodes[0]} + + err := DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod)) + if err != nil { + return err + } + + err = DetachNodes(false, nodesToRotate, autoscalingGroup.Name) + if err != nil { + return err + } + + err = TerminateNodes(nodesToRotate) + if err != nil { + return err + } + + logger.Info("Sleeping 60 seconds for autoscaling group to balance...") + time.Sleep(60 * time.Second) + + autoscalingGroupReady, err := autoscalingGroup.AutoScalingGroupReady() + if err != nil { + return err + } + + nodeHostnames, err := GetNodeHostnames(autoscalingGroupReady.Instances) + if err != nil { + return err + } + + newNodes := autoscalingGroup.newNodes(nodeHostnames) + if err != nil { + return err + } + + err = NodesReady(newNodes) + if err != nil { + return err + } + + logger.Info("Removing nodes from rotation list") + autoscalingGroup.PopNodes(nodesToRotate) + + } + return nil +} + +func (autoscalingGroup *AutoscalingGroup) workerNodeRotation(cluster *model.Cluster) error { + for len(autoscalingGroup.Nodes) > 0 { + logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) + + var nodesToRotate []string + + if len(autoscalingGroup.Nodes) < int(cluster.MaxScaling) { + nodesToRotate = autoscalingGroup.Nodes[:len(autoscalingGroup.Nodes)] + } else { + nodesToRotate = autoscalingGroup.Nodes[:int(cluster.MaxScaling)] + } + + err := DetachNodes(false, nodesToRotate, autoscalingGroup.Name) + if err != nil { + return err + } + + logger.Info("Sleeping 60 seconds for autoscaling group to balance...") + time.Sleep(60 * time.Second) + + autoscalingGroupReady, err := autoscalingGroup.AutoScalingGroupReady() + if err != nil { + return err + } + + nodeHostnames, err := GetNodeHostnames(autoscalingGroupReady.Instances) + if err != nil { + return err + } + + newNodes := autoscalingGroup.newNodes(nodeHostnames) + if err != nil { + return err + } + + err = NodesReady(newNodes) + if err != nil { + return err + } + + err = DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod)) + if err != nil { + return err + } + + err = TerminateNodes(nodesToRotate) + if err != nil { + return err + } + + err = DeleteClusterNodes(nodesToRotate) + if err != nil { + return err + } + + logger.Info("Removing nodes from rotation list") + autoscalingGroup.PopNodes(nodesToRotate) + + if len(autoscalingGroup.Nodes) > 0 { + logger.Infof("Waiting for %d seconds before next node rotation", cluster.WaitBetweenRotations) + time.Sleep(time.Duration(cluster.WaitBetweenRotations) * time.Second) + } + } + + return nil +} From 001b62184170c21a3c0619142346796dfd21f440 Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Tue, 16 Feb 2021 18:32:33 +0000 Subject: [PATCH 2/7] Code cleanup --- rotator/drain.go | 209 ----------------------------------------------- 1 file changed, 209 deletions(-) diff --git a/rotator/drain.go b/rotator/drain.go index 3db2c3d..7fe74c8 100644 --- a/rotator/drain.go +++ b/rotator/drain.go @@ -265,57 +265,6 @@ func (ps podStatuses) message() string { return strings.Join(msgs, "; ") } -// func getPodsForDeletion(client kubernetes.Interface, nodeName string, options *DrainOptions) (*podDeleteList, []error) { - -// labelSelector, err := labels.Parse(options.Selector.String()) -// if err != nil { -// return nil, []error{err} -// } - -// podList, err := client.CoreV1().Pods(metav1.NamespaceAll).List(context.TODO(), metav1.ListOptions{ -// LabelSelector: labelSelector.String(), -// FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": nodeName}).String()}) -// if err != nil { -// return nil, []error{err} -// } - -// pods := []podDelete{} - -// daemonSetOptions := &DaemonSetFilterOptions{ -// client: client.AppsV1(), -// force: options.Force, -// ignoreDaemonSets: options.IgnoreDaemonsets, -// } - -// for _, pod := range podList.Items { -// var status podDeleteStatus -// for _, filter := range []podFilter{daemonSetOptions.daemonSetFilter, mirrorPodFilter, options.localStorageFilter, options.unreplicatedFilter} { -// status = filter(pod) -// if !status.delete { -// // short-circuit as soon as pod is filtered out -// // at that point, there is no reason to run pod -// // through any additional filters -// break -// } -// } -// // Add the pod to podDeleteList no matter what podDeleteStatus is, -// // those pods whose podDeleteStatus is false like DaemonSet will -// // be catched by list.errors() -// pods = append(pods, podDelete{ -// pod: pod, -// status: status, -// }) -// } - -// list := &podDeleteList{items: pods} - -// if errs := list.errors(); len(errs) > 0 { -// return list, errs -// } - -// return list, nil -// } - // getPodsForDeletion receives resource info for a node, and returns all the pods from the given node that we // are planning on deleting. If there are any pods preventing us from deleting, we return that list in an error. func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options *DrainOptions) (pods []corev1.Pod, err error) { @@ -496,108 +445,6 @@ func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.P return utilerrors.NewAggregate(errors) } -// // EvictPod will evict the give pod, or return an error if it couldn't -// func (d *Helper) EvictPod(pod corev1.Pod, policyGroupVersion string) error { -// if d.DryRunStrategy == cmdutil.DryRunServer { -// if err := d.DryRunVerifier.HasSupport(pod.GroupVersionKind()); err != nil { -// return err -// } -// } - -// delOpts := d.makeDeleteOptions() -// eviction := &policyv1beta1.Eviction{ -// TypeMeta: metav1.TypeMeta{ -// APIVersion: policyGroupVersion, -// Kind: EvictionKind, -// }, -// ObjectMeta: metav1.ObjectMeta{ -// Name: pod.Name, -// Namespace: pod.Namespace, -// }, -// DeleteOptions: &delOpts, -// } - -// // Remember to change change the URL manipulation func when Eviction's version change -// return d.Client.PolicyV1beta1().Evictions(eviction.Namespace).Evict(context.TODO(), eviction) -// } - -// func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.Pod, policyGroupVersion string, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { -// returnCh := make(chan error, 1) -// stopCh := make(chan struct{}) -// var wg sync.WaitGroup - -// for _, pod := range pods { -// logger.Infof("Evicting pod %s", pod.Name) -// wg.Add(1) -// go func(pod corev1.Pod, returnCh chan error, stopCh chan struct{}) { -// defer wg.Done() -// var err error -// for { -// err = evictPod(client, pod, policyGroupVersion, options.GracePeriodSeconds) -// if err == nil { -// break -// } else if apierrors.IsNotFound(err) { -// returnCh <- nil -// return -// } else if apierrors.IsTooManyRequests(err) { -// select { -// case <-stopCh: -// logger.Infof("Received channel close for pod %q. Returning!!!", pod.Name) -// return -// default: -// logger.Infof("error when evicting pod %q (will retry after 5s): %v", pod.Name, err) -// time.Sleep(5 * time.Second) -// } -// } else { -// returnCh <- fmt.Errorf("error when evicting pod %q: %v", pod.Name, err) -// return -// } -// } -// podArray := []corev1.Pod{pod} -// _, err = waitForDelete(podArray, 1*time.Second, time.Duration(math.MaxInt64), true, getPodFn) -// logger.Infof("Pod %s deleted", pod.Name) -// if err == nil { -// returnCh <- nil -// } else { -// returnCh <- fmt.Errorf("error when waiting for pod %q to terminate: %v", pod.Name, err) -// } -// }(pod, returnCh, stopCh) -// } -// logger.Info("next step") - -// doneCount := 0 -// var errors []error - -// // 0 timeout means infinite, we use MaxInt64 to represent it. -// var globalTimeout time.Duration -// if options.Timeout == 0 { -// globalTimeout = time.Duration(math.MaxInt64) -// } else { -// globalTimeout = options.Timeout -// } -// globalTimeoutCh := time.After(globalTimeout) -// numPods := len(pods) -// for doneCount < numPods { -// select { -// case err := <-returnCh: -// logger.Info("next step 2") -// doneCount++ -// if err != nil { -// errors = append(errors, err) -// } -// case <-globalTimeoutCh: -// logger.Info("Closing stopCh") -// close(stopCh) -// wg.Wait() -// return fmt.Errorf("Drain did not complete within %v", globalTimeout) -// } -// } -// logger.Info("next step 3") -// close(stopCh) -// wg.Wait() -// return utilerrors.NewAggregate(errors) -// } - func deletePods(client typedcorev1.CoreV1Interface, pods []corev1.Pod, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { // 0 timeout means infinite, we use MaxInt64 to represent it. var globalTimeout time.Duration @@ -634,31 +481,6 @@ func DeletePod(client typedcorev1.CoreV1Interface, pod corev1.Pod) error { return client.Pods(pod.Namespace).Delete(context.TODO(), pod.Name, metav1.DeleteOptions{}) } -// func deletePods(client typedcorev1.CoreV1Interface, pods []corev1.Pod, options *DrainOptions, getPodFn func(namespace, name string) (*corev1.Pod, error)) error { -// // 0 timeout means infinite, we use MaxInt64 to represent it. -// ctx := context.TODO() - -// var globalTimeout time.Duration -// if options.Timeout == 0 { -// globalTimeout = time.Duration(math.MaxInt64) -// } else { -// globalTimeout = options.Timeout -// } -// deleteOptions := &metav1.DeleteOptions{} -// if options.GracePeriodSeconds >= 0 { -// gracePeriodSeconds := int64(options.GracePeriodSeconds) -// deleteOptions.GracePeriodSeconds = &gracePeriodSeconds -// } -// for _, pod := range pods { -// err := client.Pods(pod.Namespace).Delete(ctx, pod.Name, *deleteOptions) -// if err != nil && !apierrors.IsNotFound(err) { -// return err -// } -// } -// _, err := waitForDelete(pods, 1*time.Second, globalTimeout, false, getPodFn) -// return err -// } - func waitForDelete(params waitForDeleteParams) ([]corev1.Pod, error) { pods := params.pods err := wait.PollImmediate(params.interval, params.timeout, func() (bool, error) { @@ -693,37 +515,6 @@ func waitForDelete(params waitForDeleteParams) ([]corev1.Pod, error) { return pods, err } -// func waitForDelete(pods []corev1.Pod, interval, timeout time.Duration, usingEviction bool, getPodFn func(string, string) (*corev1.Pod, error)) ([]corev1.Pod, error) { -// var verbStr string -// if usingEviction { -// verbStr = "evicted" -// } else { -// verbStr = "deleted" -// } - -// err := wait.PollImmediate(interval, timeout, func() (bool, error) { -// pendingPods := []corev1.Pod{} -// for i, pod := range pods { -// logger.Infof("removing pod %q", pod.Name) -// p, err := getPodFn(pod.Namespace, pod.Name) -// if apierrors.IsNotFound(err) || (p != nil && p.ObjectMeta.UID != pod.ObjectMeta.UID) { -// logger.Infof("pod %q removed (%s)", pod.Name, verbStr) -// continue -// } else if err != nil { -// return false, err -// } else { -// pendingPods = append(pendingPods, pods[i]) -// } -// } -// pods = pendingPods -// if len(pendingPods) > 0 { -// return false, nil -// } -// return true, nil -// }) -// return pods, err -// } - // SupportEviction uses Discovery API to find out if the server // supports the eviction subresource. If supported, it will return // its groupVersion; otherwise it will return an empty string. From ee8a00e9c68bf314b3df2f26657ee37e657b8445 Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Sun, 21 Feb 2021 17:56:34 +0000 Subject: [PATCH 3/7] Transform node rotator into package --- Makefile | 53 ++++ rotator/aws_helpers.go => aws/helpers.go | 35 ++- go.mod | 3 + go.sum | 344 ++++++++++++++++++++++ rotator/kube_helpers.go => k8s/helpers.go | 61 +--- model/cluster.go | 7 + rotator/helpers.go | 64 +++- rotator/rotator.go | 108 +++++-- 8 files changed, 570 insertions(+), 105 deletions(-) create mode 100644 Makefile rename rotator/aws_helpers.go => aws/helpers.go (73%) rename rotator/kube_helpers.go => k8s/helpers.go (54%) diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..2ece1ac --- /dev/null +++ b/Makefile @@ -0,0 +1,53 @@ +# Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved. +# See LICENSE.txt for license information. + +## Docker Build Versions +DOCKER_BUILD_IMAGE = golang:1.15.7 +DOCKER_BASE_IMAGE = alpine:3.13 + +# Variables +GO = go +APP := node-rotator +APPNAME := node-rotator +FLEET_CONTROLLER_IMAGE ?= mattermost/node-rotator:test + +# Build variables +COMMIT_HASH ?= $(shell git rev-parse HEAD) +BUILD_DATE ?= $(shell date +%FT%T%z) + +################################################################################ + +export GO111MODULE=on + +all: check-style unittest + +.PHONY: check-style +check-style: govet + @echo Checking for style guide compliance + +.PHONY: vet +govet: + @echo Running govet + $(GO) vet ./... + @echo Govet success + +.PHONY: unittest +unittest: + $(GO) test ./... -v -covermode=count -coverprofile=coverage.out + +# Build for distribution +.PHONY: build +build: + @echo Building Mattermost Node Rotator + env GOOS=linux GOARCH=amd64 $(GO) build -o $(APPNAME) ./cmd/$(APP) + +# Builds the docker image +.PHONY: build-image +build-image: + @echo Building Node Rotator Docker Image + docker build \ + --build-arg DOCKER_BUILD_IMAGE=$(DOCKER_BUILD_IMAGE) \ + --build-arg DOCKER_BASE_IMAGE=$(DOCKER_BASE_IMAGE) \ + . -f build/Dockerfile \ + -t $(FLEET_CONTROLLER_IMAGE) \ + --no-cache diff --git a/rotator/aws_helpers.go b/aws/helpers.go similarity index 73% rename from rotator/aws_helpers.go rename to aws/helpers.go index 7808880..1df46d0 100644 --- a/rotator/aws_helpers.go +++ b/aws/helpers.go @@ -1,7 +1,6 @@ -package rotator +package aws import ( - "fmt" "strings" "time" @@ -10,8 +9,10 @@ import ( "github.com/aws/aws-sdk-go/service/autoscaling" "github.com/aws/aws-sdk-go/service/ec2" "github.com/pkg/errors" + "github.com/sirupsen/logrus" ) +// GetNodeHostnames returns the hostnames of an autoscaling group nodes func GetNodeHostnames(autoscalingGroupNodes []*autoscaling.Instance) ([]string, error) { svc := ec2.New(session.New()) var instanceHostnames []string @@ -27,6 +28,7 @@ func GetNodeHostnames(autoscalingGroupNodes []*autoscaling.Instance) ([]string, return instanceHostnames, nil } +// GetInstanceID returns the instance ID of a nodename func GetInstanceID(nodeName string) (string, error) { svc := ec2.New(session.New()) resp, err := svc.DescribeInstances(&ec2.DescribeInstancesInput{ @@ -43,13 +45,14 @@ func GetInstanceID(nodeName string) (string, error) { return *resp.Reservations[0].Instances[0].InstanceId, nil } -func DetachNodes(decrement bool, nodesToDetach []string, autoscalingGroupName string) error { +// DetachNodes detaches nodes from an autoscaling group +func DetachNodes(decrement bool, nodesToDetach []string, autoscalingGroupName string, logger *logrus.Entry) error { asgSvc := autoscaling.New(session.New()) for _, node := range nodesToDetach { instanceID, err := GetInstanceID(node) if err != nil { - return errors.Wrapf(err, "Failed to detach and delete node %s", node) + return errors.Wrapf(err, "Failed to detach node %s", node) } logger.Infof("Detaching instance %s", instanceID) @@ -68,7 +71,8 @@ func DetachNodes(decrement bool, nodesToDetach []string, autoscalingGroupName st return nil } -func TerminateNodes(nodesToTerminate []string) error { +// TerminateNodes terminates list of nodes +func TerminateNodes(nodesToTerminate []string, logger *logrus.Entry) error { logger.Infof("Terminating %d nodes", len(nodesToTerminate)) for _, node := range nodesToTerminate { @@ -93,6 +97,7 @@ func TerminateNodes(nodesToTerminate []string) error { return nil } +// GetAutoscalingGroups gets all the autoscaling groups that their names contain the cluster ID passed func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { svc := autoscaling.New(session.New()) @@ -106,11 +111,8 @@ func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { return nil, errors.Wrap(err, "Failed to describe autoscaling groups") } for _, asg := range resp.AutoScalingGroups { - for _, tag := range asg.Tags { - if *tag.Key == "KubernetesCluster" && *tag.Value == fmt.Sprintf("%s-kops.k8s.local", clusterID) || *tag.Key == "Name" && strings.Contains(*tag.Value, clusterID) { - autoscalingGroups = append(autoscalingGroups, asg) - break - } + if strings.Contains(*asg.AutoScalingGroupName, clusterID) { + autoscalingGroups = append(autoscalingGroups, asg) } } @@ -123,10 +125,11 @@ func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { return autoscalingGroups, nil } -func (autoscalingGroup *AutoscalingGroup) AutoScalingGroupReady() (*autoscaling.Group, error) { +// AutoScalingGroupReady gets an AutoscalingGroup object and checks that autoscaling group is in ready state +func AutoScalingGroupReady(autoscalingGroupName string, desiredCapacity int64, logger *logrus.Entry) (*autoscaling.Group, error) { svc := autoscaling.New(session.New()) timeout := 300 - logger.Infof("Waiting up to %d seconds for load balancer %s to become ready...", timeout, autoscalingGroup.Name) + logger.Infof("Waiting up to %d seconds for autoscaling group %s to become ready...", timeout, autoscalingGroupName) timer := time.NewTimer(time.Duration(timeout) * time.Second) defer timer.Stop() @@ -134,18 +137,18 @@ func (autoscalingGroup *AutoscalingGroup) AutoScalingGroupReady() (*autoscaling. for { select { case <-timer.C: - return nil, errors.New("timed out waiting for load balancer to become ready") + return nil, errors.New("timed out waiting for autoscaling group to become ready") default: resp, err := svc.DescribeAutoScalingGroups(&autoscaling.DescribeAutoScalingGroupsInput{ AutoScalingGroupNames: []*string{ - aws.String(autoscalingGroup.Name), + aws.String(autoscalingGroupName), }, }) if err != nil { - return nil, errors.Wrapf(err, "Failed to describe the autoscaling group %s", autoscalingGroup.Name) + return nil, errors.Wrapf(err, "Failed to describe the autoscaling group %s", autoscalingGroupName) } - if int64(len(resp.AutoScalingGroups[0].Instances)) == autoscalingGroup.DesiredCapacity { + if int64(len(resp.AutoScalingGroups[0].Instances)) == desiredCapacity { return resp.AutoScalingGroups[0], nil } diff --git a/go.mod b/go.mod index a63af78..f233436 100644 --- a/go.mod +++ b/go.mod @@ -2,11 +2,14 @@ module github.com/mattermost/node-rotator go 1.15 +replace github.com/mattermost/mattermost-cloud => /Users/stylianosrigas/go/src/github.com/mattermost/mattermost-cloud + require ( github.com/aws/aws-sdk-go v1.36.7 github.com/googleapis/gnostic v0.5.3 // indirect github.com/gorilla/mux v1.8.0 github.com/imdario/mergo v0.3.11 // indirect + github.com/mattermost/mattermost-cloud v0.40.0 github.com/pborman/uuid v1.2.1 github.com/pkg/errors v0.9.1 github.com/sirupsen/logrus v1.7.0 diff --git a/go.sum b/go.sum index 0ec0f1c..ee5e2d7 100644 --- a/go.sum +++ b/go.sum @@ -33,6 +33,7 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl cloud.google.com/go/storage v1.8.0/go.mod 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golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= +golang.org/x/net v0.0.0-20181005035420-146acd28ed58/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= @@ -375,13 +613,19 @@ golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73r golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= +golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= +golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= @@ -392,6 +636,7 @@ golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/ golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= +golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= @@ -413,6 +658,7 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= +golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= @@ -420,21 +666,35 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20190209173611-3b5209105503/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190321052220-f7bb7a8bee54/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys 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v0.0.0-20200113162924-86b910548bc1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -448,14 +708,17 @@ golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200622214017-ed371f2e16b4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk= golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= @@ -466,6 +729,8 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm golang.org/x/tools v0.0.0-20181011042414-1f849cf54d09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +golang.org/x/tools v0.0.0-20190125232054-d66bd3c5d5a6/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= @@ -475,10 +740,13 @@ golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBn golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= +golang.org/x/tools v0.0.0-20190617190820-da514acc4774/go.mod 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v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWc golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= +golang.org/x/tools v0.0.0-20200522201501-cb1345f3a375/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= @@ -511,6 +780,10 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= +gomodules.xyz/jsonpatch/v2 v2.0.1/go.mod h1:IhYNNY4jnS53ZnfE4PAmpKtDpTCj1JFXc+3mwe7XcUU= +gonum.org/v1/gonum v0.0.0-20190331200053-3d26580ed485/go.mod h1:2ltnJ7xHfj0zHS40VVPYEAAMTa3ZGguvHGBSJeRWqE0= +gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw= +gonum.org/v1/netlib v0.0.0-20190331212654-76723241ea4e/go.mod h1:kS+toOQn6AQKjmKJ7gzohV1XkqsFehRA2FbsbkopSuQ= google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE= google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M= google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg= @@ -566,8 +839,10 @@ google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6D google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= +google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= +google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY= google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= @@ -593,12 +868,21 @@ gopkg.in/check.v1 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+7,7 @@ import ( "time" "github.com/pkg/errors" + "github.com/sirupsen/logrus" corev1 "k8s.io/api/core/v1" k8sErrors "k8s.io/apimachinery/pkg/api/errors" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" @@ -14,13 +15,13 @@ import ( "k8s.io/client-go/tools/clientcmd" ) -func NodesReady(nodes []string) error { +func NodesReady(nodes []string, clientset *kubernetes.Clientset, logger *logrus.Entry) error { wait := 600 logger.Infof("Waiting up to %d seconds for all nodes to become ready...", wait) for _, node := range nodes { ctx, cancel := context.WithTimeout(context.Background(), time.Duration(wait)*time.Second) defer cancel() - node, err := WaitForNodeRunning(ctx, node) + node, err := WaitForNodeRunning(ctx, node, clientset, logger) if err != nil { return errors.Wrapf(err, "Node %s failed to get ready", node) } @@ -33,11 +34,7 @@ func NodesReady(nodes []string) error { // WaitForNodeRunning will poll a given kubernetes node at a regular interval for // it to enter the 'Ready' state. If the node fails to become ready before // the provided timeout then an error will be returned. -func WaitForNodeRunning(ctx context.Context, nodeName string) (*corev1.Node, error) { - clientset, err := getClientSet() - if err != nil { - return nil, errors.Wrap(err, "Failed to get k8s clientset") - } +func WaitForNodeRunning(ctx context.Context, nodeName string, clientset *kubernetes.Clientset, logger *logrus.Entry) (*corev1.Node, error) { for { node, err := clientset.CoreV1().Nodes().Get(ctx, nodeName, metav1.GetOptions{}) if err == nil { @@ -61,53 +58,11 @@ func WaitForNodeRunning(ctx context.Context, nodeName string) (*corev1.Node, err } } -func DrainNodes(nodesToDrain []string, attempts, gracePeriod int) error { - ctx := context.TODO() - - clientset, err := getClientSet() - if err != nil { - return errors.Wrap(err, "Failed to get k8s clientset") - } - - drainOptions := &DrainOptions{ - DeleteLocalData: true, - IgnoreDaemonsets: true, - Timeout: 600, - GracePeriodSeconds: gracePeriod, - } - - logger.Infof("Draining %d nodes", len(nodesToDrain)) - - for _, nodeToDrain := range nodesToDrain { - logger.Infof("Draining node %s", nodeToDrain) - node, err := clientset.CoreV1().Nodes().Get(ctx, nodeToDrain, metav1.GetOptions{}) - if err != nil { - return errors.Wrapf(err, "Failed to get node %s", nodeToDrain) - } - err = Drain(clientset, []*corev1.Node{node}, drainOptions) - if err != nil { - if attempts--; attempts > 0 { - logger.Infof("Node %s drain failed, retrying...", nodeToDrain) - DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod) - } else { - return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) - } - } - logger.Infof("Node %s drained successfully", nodeToDrain) - } - - return nil -} - -func DeleteClusterNodes(nodes []string) error { +func DeleteClusterNodes(nodes []string, clientset *kubernetes.Clientset) error { ctx := context.TODO() - clientset, err := getClientSet() - if err != nil { - return errors.Wrap(err, "Failed to get k8s clientset") - } for _, node := range nodes { - err = clientset.CoreV1().Nodes().Delete(ctx, node, metav1.DeleteOptions{}) + err := clientset.CoreV1().Nodes().Delete(ctx, node, metav1.DeleteOptions{}) if err != nil { return err } @@ -116,7 +71,7 @@ func DeleteClusterNodes(nodes []string) error { } // getClientSet gets the k8s clientset -func getClientSet() (*kubernetes.Clientset, error) { +func GetClientset() (*kubernetes.Clientset, error) { kubeconfig := filepath.Join( os.Getenv("HOME"), ".kube", "config", ) diff --git a/model/cluster.go b/model/cluster.go index be4afbb..d3f9ac4 100644 --- a/model/cluster.go +++ b/model/cluster.go @@ -3,6 +3,10 @@ package model import ( "encoding/json" "io" + + "k8s.io/client-go/kubernetes" + + cloudModel "github.com/mattermost/mattermost-cloud/model" ) // Cluster represents a K8s cluster. @@ -14,6 +18,9 @@ type Cluster struct { MaxDrainRetries int64 EvictGracePeriod int64 WaitBetweenRotations int64 + Store string + ClientSet *kubernetes.Clientset + Cluster cloudModel.Cluster } // ClusterFromReader decodes a json-encoded cluster from the given io.Reader. diff --git a/rotator/helpers.go b/rotator/helpers.go index d7b0e6c..90163d0 100644 --- a/rotator/helpers.go +++ b/rotator/helpers.go @@ -1,14 +1,22 @@ package rotator import ( + "context" + "github.com/aws/aws-sdk-go/service/autoscaling" + awsTools "github.com/mattermost/node-rotator/aws" + k8sTools "github.com/mattermost/node-rotator/k8s" + "github.com/mattermost/node-rotator/model" "github.com/pkg/errors" + corev1 "k8s.io/api/core/v1" + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" ) -func (autoscalingGroup *AutoscalingGroup) newNodes(allNodes []string) []string { +func newNodes(allNodes, oldNodes []string) []string { var newNodes []string for _, node := range allNodes { - for _, oldNode := range autoscalingGroup.Nodes { + for _, oldNode := range oldNodes { if node != oldNode { newNodes = append(newNodes, node) } @@ -17,10 +25,10 @@ func (autoscalingGroup *AutoscalingGroup) newNodes(allNodes []string) []string { return newNodes } -func (autoscalingGroup *AutoscalingGroup) setObject(asg *autoscaling.Group) error { +func (autoscalingGroup *AutoscalingGroup) SetObject(asg *autoscaling.Group) error { autoscalingGroup.Name = *asg.AutoScalingGroupName autoscalingGroup.DesiredCapacity = *asg.DesiredCapacity - nodeHostNames, err := GetNodeHostnames(asg.Instances) + nodeHostNames, err := awsTools.GetNodeHostnames(asg.Instances) if err != nil { return errors.Wrap(err, "Failed to get asg instance node names and set asg object") } @@ -28,7 +36,7 @@ func (autoscalingGroup *AutoscalingGroup) setObject(asg *autoscaling.Group) erro return nil } -func (autoscalingGroup *AutoscalingGroup) PopNodes(popNodes []string) { +func (autoscalingGroup *AutoscalingGroup) popNodes(popNodes []string) { var updatedList []string for _, node := range autoscalingGroup.Nodes { nodeFound := false @@ -59,3 +67,49 @@ func (autoscalingGroup *AutoscalingGroup) RemoveDeletedNode(nodeToDelete string) } } } + +func DrainNodes(nodesToDrain []string, attempts, gracePeriod int, clientset *kubernetes.Clientset) error { + ctx := context.TODO() + + drainOptions := &DrainOptions{ + DeleteLocalData: true, + IgnoreDaemonsets: true, + Timeout: 600, + GracePeriodSeconds: gracePeriod, + } + + logger.Infof("Draining %d nodes", len(nodesToDrain)) + + for _, nodeToDrain := range nodesToDrain { + logger.Infof("Draining node %s", nodeToDrain) + node, err := clientset.CoreV1().Nodes().Get(ctx, nodeToDrain, metav1.GetOptions{}) + if err != nil { + return errors.Wrapf(err, "Failed to get node %s", nodeToDrain) + } + err = Drain(clientset, []*corev1.Node{node}, drainOptions) + if err != nil { + if attempts--; attempts > 0 { + logger.Infof("Node %s drain failed, retrying...", nodeToDrain) + DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod, clientset) + } else { + return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) + } + } + logger.Infof("Node %s drained successfully", nodeToDrain) + } + + return nil +} + +func getk8sClientset(cluster *model.Cluster) (*kubernetes.Clientset, error) { + if cluster.ClientSet != nil { + return cluster.ClientSet, nil + } + + clientSet, err := k8sTools.GetClientset() + if err != nil { + return nil, err + } + return clientSet, nil + +} diff --git a/rotator/rotator.go b/rotator/rotator.go index 367d3e8..993ff0b 100644 --- a/rotator/rotator.go +++ b/rotator/rotator.go @@ -4,8 +4,12 @@ import ( "strings" "time" + awsTools "github.com/mattermost/node-rotator/aws" + k8sTools "github.com/mattermost/node-rotator/k8s" "github.com/mattermost/node-rotator/model" "github.com/pkg/errors" + "github.com/sirupsen/logrus" + "k8s.io/client-go/kubernetes" ) type AutoscalingGroup struct { @@ -16,15 +20,55 @@ type AutoscalingGroup struct { // InitRotateCluster is used to call the RotateCluster function. func InitRotateCluster(cluster *model.Cluster) { - err := RotateCluster(cluster) + logger := logger.WithField("cluster", cluster.ClusterID) + err := RotateCluster(cluster, logger) if err != nil { logger.WithError(err).Error("Failed to rotate the cluster nodes") } } // RotateCluster is used to rotate the Cluster nodes. -func RotateCluster(cluster *model.Cluster) error { - autoscalingGroups, err := GetAutoscalingGroups(cluster.ClusterID) +func RotateCluster(cluster *model.Cluster, logger *logrus.Entry) error { + + clientset, err := getk8sClientset(cluster) + if err != nil { + return err + } + // if len(cluster.Cluster.RotatorMetadata.MasterGroups) > 0 || cluster.Cluster.RotatorMetadata.WorkerGroups > 0 { + // for _, asg := range cluster.Cluster.RotatorMetadata.MasterGroups { + // logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + + // err = masterNodeRotation(cluster, &autoscalingGroup, clientset, logger) + // if err != nil { + // return err + // } + + // logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) + // err = finalCheck(&autoscalingGroup, clientset, logger) + // if err != nil { + // return err + // } + + // logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) + // } + + // for _, asg := range cluster.Cluster.RotatorMetadata.WorkerGroups { + // logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + + // err = workerNodeRotation(cluster, &autoscalingGroup, clientset, logger) + // if err != nil { + // return err + // } + + // logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) + // err = finalCheck(&autoscalingGroup, clientset, logger) + // if err != nil { + // return err + // } + // } + // } + + autoscalingGroups, err := awsTools.GetAutoscalingGroups(cluster.ClusterID) if err != nil { return err } @@ -32,7 +76,7 @@ func RotateCluster(cluster *model.Cluster) error { for _, asg := range autoscalingGroups { autoscalingGroup := AutoscalingGroup{} - err := autoscalingGroup.setObject(asg) + err := autoscalingGroup.SetObject(asg) if err != nil { return err } @@ -40,13 +84,13 @@ func RotateCluster(cluster *model.Cluster) error { if strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateMasters { logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) - err = autoscalingGroup.masterNodeRotation(cluster) + err = masterNodeRotation(cluster, &autoscalingGroup, clientset, logger) if err != nil { return err } logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - err = autoscalingGroup.finalCheck() + err = finalCheck(&autoscalingGroup, clientset, logger) if err != nil { return err } @@ -55,13 +99,13 @@ func RotateCluster(cluster *model.Cluster) error { } else if !strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateWorkers { logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) - err = autoscalingGroup.workerNodeRotation(cluster) + err = workerNodeRotation(cluster, &autoscalingGroup, clientset, logger) if err != nil { return err } logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - err = autoscalingGroup.finalCheck() + err = finalCheck(&autoscalingGroup, clientset, logger) if err != nil { return err } @@ -73,18 +117,18 @@ func RotateCluster(cluster *model.Cluster) error { return nil } -func (autoscalingGroup *AutoscalingGroup) finalCheck() error { - asg, err := autoscalingGroup.AutoScalingGroupReady() +func finalCheck(autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { + asg, err := awsTools.AutoScalingGroupReady(autoscalingGroup.Name, autoscalingGroup.DesiredCapacity, logger) if err != nil { return errors.Wrap(err, "Failed to get AutoscalingGroup ready") } - asgNodes, err := GetNodeHostnames(asg.Instances) + asgNodes, err := awsTools.GetNodeHostnames(asg.Instances) if err != nil { return errors.Wrap(err, "Failed to get node hostnames") } - err = NodesReady(asgNodes) + err = k8sTools.NodesReady(asgNodes, clientset, logger) if err != nil { return errors.Wrap(err, "Failed to get cluster nodes ready") } @@ -92,23 +136,24 @@ func (autoscalingGroup *AutoscalingGroup) finalCheck() error { return nil } -func (autoscalingGroup *AutoscalingGroup) masterNodeRotation(cluster *model.Cluster) error { +func masterNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { + for len(autoscalingGroup.Nodes) > 0 { logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) nodesToRotate := []string{autoscalingGroup.Nodes[0]} - err := DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod)) + err := DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), clientset) if err != nil { return err } - err = DetachNodes(false, nodesToRotate, autoscalingGroup.Name) + err = awsTools.DetachNodes(false, nodesToRotate, autoscalingGroup.Name, logger) if err != nil { return err } - err = TerminateNodes(nodesToRotate) + err = awsTools.TerminateNodes(nodesToRotate, logger) if err != nil { return err } @@ -116,34 +161,35 @@ func (autoscalingGroup *AutoscalingGroup) masterNodeRotation(cluster *model.Clus logger.Info("Sleeping 60 seconds for autoscaling group to balance...") time.Sleep(60 * time.Second) - autoscalingGroupReady, err := autoscalingGroup.AutoScalingGroupReady() + autoscalingGroupReady, err := awsTools.AutoScalingGroupReady(autoscalingGroup.Name, autoscalingGroup.DesiredCapacity, logger) if err != nil { return err } - nodeHostnames, err := GetNodeHostnames(autoscalingGroupReady.Instances) + nodeHostnames, err := awsTools.GetNodeHostnames(autoscalingGroupReady.Instances) if err != nil { return err } - newNodes := autoscalingGroup.newNodes(nodeHostnames) + newNodes := newNodes(nodeHostnames, autoscalingGroup.Nodes) if err != nil { return err } - err = NodesReady(newNodes) + err = k8sTools.NodesReady(newNodes, clientset, logger) if err != nil { return err } logger.Info("Removing nodes from rotation list") - autoscalingGroup.PopNodes(nodesToRotate) + autoscalingGroup.popNodes(nodesToRotate) } return nil } -func (autoscalingGroup *AutoscalingGroup) workerNodeRotation(cluster *model.Cluster) error { +func workerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { + for len(autoscalingGroup.Nodes) > 0 { logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) @@ -155,7 +201,7 @@ func (autoscalingGroup *AutoscalingGroup) workerNodeRotation(cluster *model.Clus nodesToRotate = autoscalingGroup.Nodes[:int(cluster.MaxScaling)] } - err := DetachNodes(false, nodesToRotate, autoscalingGroup.Name) + err := awsTools.DetachNodes(false, nodesToRotate, autoscalingGroup.Name, logger) if err != nil { return err } @@ -163,43 +209,43 @@ func (autoscalingGroup *AutoscalingGroup) workerNodeRotation(cluster *model.Clus logger.Info("Sleeping 60 seconds for autoscaling group to balance...") time.Sleep(60 * time.Second) - autoscalingGroupReady, err := autoscalingGroup.AutoScalingGroupReady() + autoscalingGroupReady, err := awsTools.AutoScalingGroupReady(autoscalingGroup.Name, autoscalingGroup.DesiredCapacity, logger) if err != nil { return err } - nodeHostnames, err := GetNodeHostnames(autoscalingGroupReady.Instances) + nodeHostnames, err := awsTools.GetNodeHostnames(autoscalingGroupReady.Instances) if err != nil { return err } - newNodes := autoscalingGroup.newNodes(nodeHostnames) + newNodes := newNodes(nodeHostnames, autoscalingGroup.Nodes) if err != nil { return err } - err = NodesReady(newNodes) + err = k8sTools.NodesReady(newNodes, clientset, logger) if err != nil { return err } - err = DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod)) + err = DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), clientset) if err != nil { return err } - err = TerminateNodes(nodesToRotate) + err = awsTools.TerminateNodes(nodesToRotate, logger) if err != nil { return err } - err = DeleteClusterNodes(nodesToRotate) + err = k8sTools.DeleteClusterNodes(nodesToRotate, clientset) if err != nil { return err } logger.Info("Removing nodes from rotation list") - autoscalingGroup.PopNodes(nodesToRotate) + autoscalingGroup.popNodes(nodesToRotate) if len(autoscalingGroup.Nodes) > 0 { logger.Infof("Waiting for %d seconds before next node rotation", cluster.WaitBetweenRotations) From 7734a750a9f79b0a0cdcbb918a7ee3e73c48b8cf Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Thu, 25 Feb 2021 11:15:39 +0000 Subject: [PATCH 4/7] Code improvements, abbility to call as individual package --- README.md | 4 +- api/api.go | 6 +- aws/helpers.go | 86 +++++++--- cmd/rotator/rotator.go | 20 ++- go.mod | 3 - go.sum | 345 +--------------------------------------- k8s/helpers.go | 6 +- model/cluster.go | 13 +- model/rotate_request.go | 13 +- rotator/drain.go | 8 +- rotator/helpers.go | 100 +++++++++--- rotator/rotator.go | 152 +++++++----------- 12 files changed, 240 insertions(+), 516 deletions(-) diff --git a/README.md b/README.md index fbb681f..f26a311 100644 --- a/README.md +++ b/README.md @@ -1 +1,3 @@ -# node-rotator \ No newline at end of file +# Node Rotator + +Node Rotator is a tool meant to smooth and accelerate k8s cluster upgrades and node rotations. It offers automation on autoscaling group recognition and flexility on options such as, how fast to rotate nodes, drain retries, waiting time between rotation and drains as well as worker master node separation. diff --git a/api/api.go b/api/api.go index ed4d00f..1b9c0ea 100644 --- a/api/api.go +++ b/api/api.go @@ -35,6 +35,7 @@ func initCluster(apiRouter *mux.Router, context *Context) { // "maxDrainRetries": 10, // "EvictGracePeriod": 60, // "WaitBetweenRotations": 60, +// "WaitBetweenDrains": 60, // } func handleRotateCluster(c *Context, w http.ResponseWriter, r *http.Request) { rotateClusterRequest, err := model.NewRotateClusterRequestFromReader(r.Body) @@ -52,9 +53,12 @@ func handleRotateCluster(c *Context, w http.ResponseWriter, r *http.Request) { MaxDrainRetries: rotateClusterRequest.MaxDrainRetries, EvictGracePeriod: rotateClusterRequest.EvictGracePeriod, WaitBetweenRotations: rotateClusterRequest.WaitBetweenRotations, + WaitBetweenDrains: rotateClusterRequest.WaitBetweenDrains, } - go rotator.InitRotateCluster(&cluster) + rotatorMetada := rotator.RotatorMetadata{} + + go rotator.InitRotateCluster(&cluster, &rotatorMetada) w.Header().Set("Content-Type", "application/json") w.WriteHeader(http.StatusAccepted) diff --git a/aws/helpers.go b/aws/helpers.go index 1df46d0..27e10c4 100644 --- a/aws/helpers.go +++ b/aws/helpers.go @@ -12,7 +12,7 @@ import ( "github.com/sirupsen/logrus" ) -// GetNodeHostnames returns the hostnames of an autoscaling group nodes +// GetNodeHostnames returns the hostnames of the autoscaling group nodes. func GetNodeHostnames(autoscalingGroupNodes []*autoscaling.Instance) ([]string, error) { svc := ec2.New(session.New()) var instanceHostnames []string @@ -28,8 +28,8 @@ func GetNodeHostnames(autoscalingGroupNodes []*autoscaling.Instance) ([]string, return instanceHostnames, nil } -// GetInstanceID returns the instance ID of a nodename -func GetInstanceID(nodeName string) (string, error) { +// GetInstanceID returns the instance ID of a node. +func GetInstanceID(nodeName string, logger *logrus.Entry) (string, error) { svc := ec2.New(session.New()) resp, err := svc.DescribeInstances(&ec2.DescribeInstancesInput{ Filters: []*ec2.Filter{ @@ -42,45 +42,67 @@ func GetInstanceID(nodeName string) (string, error) { if err != nil { return "", errors.Wrap(err, "Failed to describe ec2 instance") } + + if resp.Reservations == nil { + logger.Warnf("Instance %s not found, assuming that instance was already deleted", nodeName) + return "", nil + } + return *resp.Reservations[0].Instances[0].InstanceId, nil } -// DetachNodes detaches nodes from an autoscaling group +// DetachNodes detaches nodes from an autoscaling group. func DetachNodes(decrement bool, nodesToDetach []string, autoscalingGroupName string, logger *logrus.Entry) error { asgSvc := autoscaling.New(session.New()) for _, node := range nodesToDetach { - instanceID, err := GetInstanceID(node) + instanceID, err := GetInstanceID(node, logger) if err != nil { return errors.Wrapf(err, "Failed to detach node %s", node) } - logger.Infof("Detaching instance %s", instanceID) - _, err = asgSvc.DetachInstances(&autoscaling.DetachInstancesInput{ - AutoScalingGroupName: aws.String(autoscalingGroupName), - InstanceIds: []*string{ - aws.String(instanceID), - }, - ShouldDecrementDesiredCapacity: aws.Bool(decrement), - }) + if instanceID == "" { + logger.Infof("Instance %s does not exist. No detachment required", node) + return nil + } + + nodeInGroup, err := nodeInAutoscalingGroup(autoscalingGroupName, instanceID) if err != nil { - return errors.Wrapf(err, "Failed to detach instance %s", instanceID) + return errors.Wrapf(err, "Failed to check if instance is member of the ASG") } + if nodeInGroup { + logger.Infof("Detaching instance %s", instanceID) + _, err = asgSvc.DetachInstances(&autoscaling.DetachInstancesInput{ + AutoScalingGroupName: aws.String(autoscalingGroupName), + InstanceIds: []*string{ + aws.String(instanceID), + }, + ShouldDecrementDesiredCapacity: aws.Bool(decrement), + }) + if err != nil { + return errors.Wrapf(err, "Failed to detach instance %s", instanceID) + } + } + } return nil } -// TerminateNodes terminates list of nodes +// TerminateNodes terminates a slice of nodes. func TerminateNodes(nodesToTerminate []string, logger *logrus.Entry) error { logger.Infof("Terminating %d nodes", len(nodesToTerminate)) - for _, node := range nodesToTerminate { - instanceID, err := GetInstanceID(node) + instanceID, err := GetInstanceID(node, logger) if err != nil { return errors.Wrapf(err, "Failed to detach and delete node %s", node) } + if instanceID == "" { + logger.Infof("Instance %s does not exist. No termination required", node) + return nil + } + logger.Infof("Terminating instance %s", instanceID) ec2Svc := ec2.New(session.New()) @@ -97,10 +119,9 @@ func TerminateNodes(nodesToTerminate []string, logger *logrus.Entry) error { return nil } -// GetAutoscalingGroups gets all the autoscaling groups that their names contain the cluster ID passed +// GetAutoscalingGroups gets all the autoscaling groups that their names contain the cluster ID passed. func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { svc := autoscaling.New(session.New()) - var autoscalingGroups []*autoscaling.Group var nextToken *string for { @@ -115,7 +136,6 @@ func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { autoscalingGroups = append(autoscalingGroups, asg) } } - if resp.NextToken == nil || *resp.NextToken == "" { break } @@ -125,8 +145,8 @@ func GetAutoscalingGroups(clusterID string) ([]*autoscaling.Group, error) { return autoscalingGroups, nil } -// AutoScalingGroupReady gets an AutoscalingGroup object and checks that autoscaling group is in ready state -func AutoScalingGroupReady(autoscalingGroupName string, desiredCapacity int64, logger *logrus.Entry) (*autoscaling.Group, error) { +// AutoScalingGroupReady gets an AutoscalingGroup object and checks that autoscaling group is in ready state. +func AutoScalingGroupReady(autoscalingGroupName string, desiredCapacity int, logger *logrus.Entry) (*autoscaling.Group, error) { svc := autoscaling.New(session.New()) timeout := 300 logger.Infof("Waiting up to %d seconds for autoscaling group %s to become ready...", timeout, autoscalingGroupName) @@ -148,7 +168,7 @@ func AutoScalingGroupReady(autoscalingGroupName string, desiredCapacity int64, l return nil, errors.Wrapf(err, "Failed to describe the autoscaling group %s", autoscalingGroupName) } - if int64(len(resp.AutoScalingGroups[0].Instances)) == desiredCapacity { + if len(resp.AutoScalingGroups[0].Instances) == desiredCapacity { return resp.AutoScalingGroups[0], nil } @@ -157,3 +177,23 @@ func AutoScalingGroupReady(autoscalingGroupName string, desiredCapacity int64, l } } } + +// nodeInAutoscalingGroup checks if an instance is member of an Autoscaling Group. +func nodeInAutoscalingGroup(autoscalingGroupName, instanceID string) (bool, error) { + svc := autoscaling.New(session.New()) + resp, err := svc.DescribeAutoScalingGroups(&autoscaling.DescribeAutoScalingGroupsInput{ + AutoScalingGroupNames: []*string{ + aws.String(autoscalingGroupName), + }, + }) + if err != nil { + return false, err + } + + for _, instance := range resp.AutoScalingGroups[0].Instances { + if *instance.InstanceId == instanceID { + return true, nil + } + } + return false, nil +} diff --git a/cmd/rotator/rotator.go b/cmd/rotator/rotator.go index 9add34c..4749dda 100644 --- a/cmd/rotator/rotator.go +++ b/cmd/rotator/rotator.go @@ -13,12 +13,13 @@ func init() { clusterCmd.PersistentFlags().String("server", "http://localhost:8079", "The Node Rotator server whose API will be queried.") rotatorCmd.Flags().String("cluster", "", "the cluster ID of the cluster to go through node rotation") - rotatorCmd.Flags().Int64("max-scaling", 1, "the max number of nodes rotating in parallel") + rotatorCmd.Flags().Int("max-scaling", 1, "the max number of nodes rotating in parallel") rotatorCmd.Flags().Bool("rotate-masters", false, "if disabled, master nodes will not be rotated") rotatorCmd.Flags().Bool("rotate-workers", false, "if disabled, worker nodes will not be rotated") - rotatorCmd.Flags().Int64("max-drain-retries", 10, "the max number of retries when drain fails") - rotatorCmd.Flags().Int64("evict-grace-period", 60, "the pod eviction grace period") - rotatorCmd.Flags().Int64("wait-between-rotations", 60, "the time in seconds between each node rotation") + rotatorCmd.Flags().Int("max-drain-retries", 10, "the max number of retries when drain fails") + rotatorCmd.Flags().Int("evict-grace-period", 60, "the pod eviction grace period") + rotatorCmd.Flags().Int("wait-between-rotations", 60, "the time in seconds between each node rotation") + rotatorCmd.Flags().Int("wait-between-drains", 60, "the time in seconds between each node drain") clusterCmd.AddCommand(rotatorCmd) } @@ -28,6 +29,7 @@ var clusterCmd = &cobra.Command{ Short: "Rotate cluster nodes by the node rotator server.", } +// TODO: Add node handling capabilities var nodeCmd = &cobra.Command{ Use: "node", Short: "Handle node changees, drain, detach, terminate, etc.", @@ -42,12 +44,13 @@ var rotatorCmd = &cobra.Command{ client := model.NewClient(serverAddress) clusterID, _ := command.Flags().GetString("cluster") - maxScaling, _ := command.Flags().GetInt64("max-scaling") + maxScaling, _ := command.Flags().GetInt("max-scaling") rotateMasters, _ := command.Flags().GetBool("rotate-masters") rotateWorkers, _ := command.Flags().GetBool("rotate-workers") - maxDrainRetries, _ := command.Flags().GetInt64("max-drain-retries") - evictGracePeriod, _ := command.Flags().GetInt64("evict-grace-period") - waitBetweenRotations, _ := command.Flags().GetInt64("wait-between-rotations") + maxDrainRetries, _ := command.Flags().GetInt("max-drain-retries") + evictGracePeriod, _ := command.Flags().GetInt("evict-grace-period") + waitBetweenRotations, _ := command.Flags().GetInt("wait-between-rotations") + waitBetweenDrains, _ := command.Flags().GetInt("wait-between-drains") rotator, err := client.RotateCluster(&model.RotateClusterRequest{ ClusterID: clusterID, @@ -57,6 +60,7 @@ var rotatorCmd = &cobra.Command{ MaxDrainRetries: maxDrainRetries, EvictGracePeriod: evictGracePeriod, WaitBetweenRotations: waitBetweenRotations, + WaitBetweenDrains: waitBetweenDrains, }) if err != nil { return errors.Wrap(err, "failed to rotate nodes of the k8s cluster") diff --git a/go.mod b/go.mod index f233436..a63af78 100644 --- a/go.mod +++ b/go.mod @@ -2,14 +2,11 @@ module github.com/mattermost/node-rotator go 1.15 -replace github.com/mattermost/mattermost-cloud => /Users/stylianosrigas/go/src/github.com/mattermost/mattermost-cloud - require ( github.com/aws/aws-sdk-go v1.36.7 github.com/googleapis/gnostic v0.5.3 // indirect github.com/gorilla/mux v1.8.0 github.com/imdario/mergo v0.3.11 // indirect - github.com/mattermost/mattermost-cloud v0.40.0 github.com/pborman/uuid v1.2.1 github.com/pkg/errors v0.9.1 github.com/sirupsen/logrus v1.7.0 diff --git a/go.sum b/go.sum index ee5e2d7..5c4d325 100644 --- a/go.sum +++ b/go.sum @@ -33,7 +33,6 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs= cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0= dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= -github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8= 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-golang.org/x/net v0.0.0-20181005035420-146acd28ed58/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= @@ -613,19 +378,13 @@ golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73r golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= -golang.org/x/net v0.0.0-20190320064053-1272bf9dcd53/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= -golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks= -golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= -golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= -golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= -golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= @@ -636,7 +395,6 @@ golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/ golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= -golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A= golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= @@ -658,7 +416,6 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= -golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= @@ -666,35 +423,21 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h golang.org/x/sys v0.0.0-20181026203630-95b1ffbd15a5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20181107165924-66b7b1311ac8/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= -golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= -golang.org/x/sys v0.0.0-20190209173611-3b5209105503/go.mod 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h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= @@ -708,17 +451,14 @@ golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7w golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200622214017-ed371f2e16b4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA= golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= -golang.org/x/text v0.0.0-20160726164857-2910a502d2bf/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk= golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k= golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= -golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ= @@ -729,8 +469,6 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm golang.org/x/tools v0.0.0-20181011042414-1f849cf54d09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= -golang.org/x/tools v0.0.0-20190125232054-d66bd3c5d5a6/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= -golang.org/x/tools v0.0.0-20190206041539-40960b6deb8e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY= golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs= @@ -740,13 +478,10 @@ golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBn golang.org/x/tools v0.0.0-20190506145303-2d16b83fe98c/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q= golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= -golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= -golang.org/x/tools v0.0.0-20190617190820-da514acc4774/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= -golang.org/x/tools v0.0.0-20190920225731-5eefd052ad72/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= @@ -770,7 +505,6 @@ golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWc golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200515010526-7d3b6ebf133d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= -golang.org/x/tools v0.0.0-20200522201501-cb1345f3a375/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA= @@ -780,10 +514,6 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE= golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= -gomodules.xyz/jsonpatch/v2 v2.0.1/go.mod h1:IhYNNY4jnS53ZnfE4PAmpKtDpTCj1JFXc+3mwe7XcUU= -gonum.org/v1/gonum v0.0.0-20190331200053-3d26580ed485/go.mod h1:2ltnJ7xHfj0zHS40VVPYEAAMTa3ZGguvHGBSJeRWqE0= -gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw= -gonum.org/v1/netlib v0.0.0-20190331212654-76723241ea4e/go.mod h1:kS+toOQn6AQKjmKJ7gzohV1XkqsFehRA2FbsbkopSuQ= google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE= google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M= google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg= @@ -836,13 +566,12 @@ google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7Fc google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= +google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154 h1:bFFRpT+e8JJVY7lMMfvezL1ZIwqiwmPl2bsE2yx4HqM= google.golang.org/genproto v0.0.0-20201019141844-1ed22bb0c154/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no= google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c= google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38= -google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM= google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= -google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg= google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY= google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk= @@ -850,6 +579,7 @@ google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8 google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60= google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk= google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= +google.golang.org/grpc v1.31.0 h1:T7P4R73V3SSDPhH7WW7ATbfViLtmamH0DKrP3f9AuDI= google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak= google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8= google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0= @@ -868,20 +598,12 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= -gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU= -gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= -gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw= gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys= -gopkg.in/go-playground/assert.v1 v1.2.1/go.mod 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-sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06 h1:zD2IemQ4LmOcAumeiyDWXKUI2SO0NYDe3H6QGvPOVgU= -sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18= -sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw= -sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw= sigs.k8s.io/structured-merge-diff/v4 v4.0.1 h1:YXTMot5Qz/X1iBRJhAt+vI+HVttY0WkSqqhKxQ0xVbA= sigs.k8s.io/structured-merge-diff/v4 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw= sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= diff --git a/k8s/helpers.go b/k8s/helpers.go index 31493e3..7caa51b 100644 --- a/k8s/helpers.go +++ b/k8s/helpers.go @@ -58,12 +58,14 @@ func WaitForNodeRunning(ctx context.Context, nodeName string, clientset *kuberne } } -func DeleteClusterNodes(nodes []string, clientset *kubernetes.Clientset) error { +func DeleteClusterNodes(nodes []string, clientset *kubernetes.Clientset, logger *logrus.Entry) error { ctx := context.TODO() for _, node := range nodes { err := clientset.CoreV1().Nodes().Delete(ctx, node, metav1.DeleteOptions{}) - if err != nil { + if k8sErrors.IsNotFound(err) { + logger.Warnf("Node %s not found, assuming already removed from cluster", node) + } else if err != nil { return err } } diff --git a/model/cluster.go b/model/cluster.go index d3f9ac4..836319a 100644 --- a/model/cluster.go +++ b/model/cluster.go @@ -5,22 +5,19 @@ import ( "io" "k8s.io/client-go/kubernetes" - - cloudModel "github.com/mattermost/mattermost-cloud/model" ) // Cluster represents a K8s cluster. type Cluster struct { ClusterID string - MaxScaling int64 + MaxScaling int RotateMasters bool RotateWorkers bool - MaxDrainRetries int64 - EvictGracePeriod int64 - WaitBetweenRotations int64 - Store string + MaxDrainRetries int + EvictGracePeriod int + WaitBetweenRotations int + WaitBetweenDrains int ClientSet *kubernetes.Clientset - Cluster cloudModel.Cluster } // ClusterFromReader decodes a json-encoded cluster from the given io.Reader. diff --git a/model/rotate_request.go b/model/rotate_request.go index 2084646..0ca9fa3 100644 --- a/model/rotate_request.go +++ b/model/rotate_request.go @@ -10,12 +10,13 @@ import ( // RotateClusterRequest specifies the parameters for a new cluster rotation. type RotateClusterRequest struct { ClusterID string `json:"clusterID,omitempty"` - MaxScaling int64 `json:"maxScaling,omitempty"` + MaxScaling int `json:"maxScaling,omitempty"` RotateMasters bool `json:"rotateMasters,omitempty"` RotateWorkers bool `json:"rotateWorkers,omitempty"` - MaxDrainRetries int64 `json:"maxDrainRetries,omitempty"` - EvictGracePeriod int64 `json:"evictGracePeriod,omitempty"` - WaitBetweenRotations int64 `json:"waitBetweenRotations,omitempty"` + MaxDrainRetries int `json:"maxDrainRetries,omitempty"` + EvictGracePeriod int `json:"evictGracePeriod,omitempty"` + WaitBetweenRotations int `json:"waitBetweenRotations,omitempty"` + WaitBetweenDrains int `json:"waitBetweenDrains,omitempty"` } // NewRotateClusterRequestFromReader decodes the request and returns after validation and setting the defaults. @@ -45,6 +46,4 @@ func (request *RotateClusterRequest) Validate() error { } // SetDefaults sets the default values for a cluster provision request. -func (request *RotateClusterRequest) SetDefaults() { - -} +func (request *RotateClusterRequest) SetDefaults() {} diff --git a/rotator/drain.go b/rotator/drain.go index 7fe74c8..ae9a11b 100644 --- a/rotator/drain.go +++ b/rotator/drain.go @@ -388,7 +388,7 @@ func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.P select { case <-ctx.Done(): // return here or we'll leak a goroutine. - returnCh <- fmt.Errorf("error when evicting pod %q: global timeout reached: %v", pod.Name, globalTimeout) + returnCh <- fmt.Errorf("Error when evicting pod %q: global timeout reached: %v", pod.Name, globalTimeout) return default: } @@ -399,14 +399,14 @@ func evictPods(client typedpolicyv1beta1.PolicyV1beta1Interface, pods []corev1.P returnCh <- nil return } else if apierrors.IsTooManyRequests(err) { - logger.Errorf("error when evicting pod %q (will retry after 5s): %v\n", pod.Name, err) + logger.Errorf("Error when evicting pod %q (will retry after 5s): %v\n", pod.Name, err) time.Sleep(5 * time.Second) } else { - returnCh <- fmt.Errorf("error when evicting pod %q: %v", pod.Name, err) + returnCh <- fmt.Errorf("Error when evicting pod %q: %v", pod.Name, err) return } } - logger.Infof("pod %s/%s evicted\n", pod.Namespace, pod.Name) + logger.Infof("Pod %s/%s evicted\n", pod.Namespace, pod.Name) params := waitForDeleteParams{ ctx: ctx, pods: []corev1.Pod{pod}, diff --git a/rotator/helpers.go b/rotator/helpers.go index 90163d0..358d760 100644 --- a/rotator/helpers.go +++ b/rotator/helpers.go @@ -2,17 +2,22 @@ package rotator import ( "context" + "strings" + "time" "github.com/aws/aws-sdk-go/service/autoscaling" awsTools "github.com/mattermost/node-rotator/aws" k8sTools "github.com/mattermost/node-rotator/k8s" "github.com/mattermost/node-rotator/model" "github.com/pkg/errors" + "github.com/sirupsen/logrus" corev1 "k8s.io/api/core/v1" + k8sErrors "k8s.io/apimachinery/pkg/api/errors" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/client-go/kubernetes" ) +// newNodes separates old nodes from new in a provided slice and returns new. func newNodes(allNodes, oldNodes []string) []string { var newNodes []string for _, node := range allNodes { @@ -25,9 +30,10 @@ func newNodes(allNodes, oldNodes []string) []string { return newNodes } +// SetObject sets each AutoscalingGroup object. func (autoscalingGroup *AutoscalingGroup) SetObject(asg *autoscaling.Group) error { autoscalingGroup.Name = *asg.AutoScalingGroupName - autoscalingGroup.DesiredCapacity = *asg.DesiredCapacity + autoscalingGroup.DesiredCapacity = int(*asg.DesiredCapacity) nodeHostNames, err := awsTools.GetNodeHostnames(asg.Instances) if err != nil { return errors.Wrap(err, "Failed to get asg instance node names and set asg object") @@ -36,6 +42,7 @@ func (autoscalingGroup *AutoscalingGroup) SetObject(asg *autoscaling.Group) erro return nil } +// popNodes removes a node that completed rotation from the AutoscalingGroup object node list. func (autoscalingGroup *AutoscalingGroup) popNodes(popNodes []string) { var updatedList []string for _, node := range autoscalingGroup.Nodes { @@ -54,21 +61,8 @@ func (autoscalingGroup *AutoscalingGroup) popNodes(popNodes []string) { return } -func (autoscalingGroup *AutoscalingGroup) popNode(i int) { - copy(autoscalingGroup.Nodes[i:], autoscalingGroup.Nodes[i+1:]) // Shift a[i+1:] left one index. - autoscalingGroup.Nodes[len(autoscalingGroup.Nodes)-1] = "" // Erase last element (write zero value). - autoscalingGroup.Nodes = autoscalingGroup.Nodes[:len(autoscalingGroup.Nodes)-1] // Truncate slice. -} - -func (autoscalingGroup *AutoscalingGroup) RemoveDeletedNode(nodeToDelete string) { - for i, node := range autoscalingGroup.Nodes { - if node == nodeToDelete { - autoscalingGroup.Nodes = append(autoscalingGroup.Nodes[:i], autoscalingGroup.Nodes[i+1:]...) - } - } -} - -func DrainNodes(nodesToDrain []string, attempts, gracePeriod int, clientset *kubernetes.Clientset) error { +// DrainNodes covers all node drain actions. +func (autoscalingGroup *AutoscalingGroup) DrainNodes(nodesToDrain []string, attempts, gracePeriod, wait int, clientset *kubernetes.Clientset, logger *logrus.Entry, nodeType string) error { ctx := context.TODO() drainOptions := &DrainOptions{ @@ -80,27 +74,57 @@ func DrainNodes(nodesToDrain []string, attempts, gracePeriod int, clientset *kub logger.Infof("Draining %d nodes", len(nodesToDrain)) + remaining := len(nodesToDrain) + for _, nodeToDrain := range nodesToDrain { logger.Infof("Draining node %s", nodeToDrain) + node, err := clientset.CoreV1().Nodes().Get(ctx, nodeToDrain, metav1.GetOptions{}) - if err != nil { + if k8sErrors.IsNotFound(err) { + logger.Warnf("Node %s not found, assuming already drained", nodeToDrain) + } else if err != nil { return errors.Wrapf(err, "Failed to get node %s", nodeToDrain) + } else { + err = Drain(clientset, []*corev1.Node{node}, drainOptions) + if err != nil { + if attempts--; attempts > 0 { + logger.Infof("Node %s drain failed, retrying...", nodeToDrain) + autoscalingGroup.DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod, wait, clientset, logger, nodeType) + } else { + return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) + } + } + logger.Infof("Node %s drained successfully", nodeToDrain) } - err = Drain(clientset, []*corev1.Node{node}, drainOptions) - if err != nil { - if attempts--; attempts > 0 { - logger.Infof("Node %s drain failed, retrying...", nodeToDrain) - DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod, clientset) - } else { - return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) + + //Terminating nodes after each drain rotation ensures that nodes do not hang and create alerts. + if nodeType == "worker" { + err = awsTools.TerminateNodes([]string{nodeToDrain}, logger) + if err != nil { + return err } + + err = k8sTools.DeleteClusterNodes([]string{nodeToDrain}, clientset, logger) + if err != nil { + return err + } + + logger.Info("Removing node from rotation list") + autoscalingGroup.popNodes([]string{nodeToDrain}) + + } + remaining-- + if remaining > 0 { + logger.Infof("Waiting for %d seconds before next node drain", wait) + time.Sleep(time.Duration(wait) * time.Second) } - logger.Infof("Node %s drained successfully", nodeToDrain) + } return nil } +// getk8sClientset returns the k8s clientset. Uses local config if no client is provided. func getk8sClientset(cluster *model.Cluster) (*kubernetes.Clientset, error) { if cluster.ClientSet != nil { return cluster.ClientSet, nil @@ -113,3 +137,29 @@ func getk8sClientset(cluster *model.Cluster) (*kubernetes.Clientset, error) { return clientSet, nil } + +// GetSetAutoscalingGroups separates master from worker Autoscaling Groups and prepares the respective objects. +func (metadata *RotatorMetadata) GetSetAutoscalingGroups(cluster *model.Cluster) error { + asgs, err := awsTools.GetAutoscalingGroups(cluster.ClusterID) + if err != nil { + return err + } + logger.Infof("Cluster with cluster ID %s is consisted of %d Autoscaling Groups", cluster.ClusterID, len(asgs)) + var autoscalingGroups []AutoscalingGroup + + for _, asg := range asgs { + autoscalingGroup := AutoscalingGroup{} + err := autoscalingGroup.SetObject(asg) + if err != nil { + return err + } + + if strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateMasters { + metadata.MasterGroups = append(metadata.MasterGroups, autoscalingGroup) + } else if !strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateWorkers { + metadata.WorkerGroups = append(metadata.WorkerGroups, autoscalingGroup) + } + autoscalingGroups = append(autoscalingGroups, autoscalingGroup) + } + return nil +} diff --git a/rotator/rotator.go b/rotator/rotator.go index 993ff0b..58caed7 100644 --- a/rotator/rotator.go +++ b/rotator/rotator.go @@ -1,7 +1,6 @@ package rotator import ( - "strings" "time" awsTools "github.com/mattermost/node-rotator/aws" @@ -12,112 +11,90 @@ import ( "k8s.io/client-go/kubernetes" ) +// AutoscalingGroup creates a autoscaling group object. type AutoscalingGroup struct { Name string - DesiredCapacity int64 + DesiredCapacity int Nodes []string } +// RotatorMetadata is a container struct for any metadata related to cluster rotator. +type RotatorMetadata struct { + MasterGroups []AutoscalingGroup `json:"MasterGroups,omitempty"` + WorkerGroups []AutoscalingGroup `json:"WorkerGroups,omitempty"` +} + // InitRotateCluster is used to call the RotateCluster function. -func InitRotateCluster(cluster *model.Cluster) { +func InitRotateCluster(cluster *model.Cluster, rotatorMetadata *RotatorMetadata) (*RotatorMetadata, error) { logger := logger.WithField("cluster", cluster.ClusterID) - err := RotateCluster(cluster, logger) + rotatorMetadata, err := RotateCluster(cluster, logger, rotatorMetadata) if err != nil { - logger.WithError(err).Error("Failed to rotate the cluster nodes") + return rotatorMetadata, err } + + return rotatorMetadata, nil } // RotateCluster is used to rotate the Cluster nodes. -func RotateCluster(cluster *model.Cluster, logger *logrus.Entry) error { - +func RotateCluster(cluster *model.Cluster, logger *logrus.Entry, rotatorMetadata *RotatorMetadata) (*RotatorMetadata, error) { clientset, err := getk8sClientset(cluster) if err != nil { - return err + return rotatorMetadata, err } - // if len(cluster.Cluster.RotatorMetadata.MasterGroups) > 0 || cluster.Cluster.RotatorMetadata.WorkerGroups > 0 { - // for _, asg := range cluster.Cluster.RotatorMetadata.MasterGroups { - // logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) - - // err = masterNodeRotation(cluster, &autoscalingGroup, clientset, logger) - // if err != nil { - // return err - // } - - // logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - // err = finalCheck(&autoscalingGroup, clientset, logger) - // if err != nil { - // return err - // } - - // logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) - // } - - // for _, asg := range cluster.Cluster.RotatorMetadata.WorkerGroups { - // logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) - - // err = workerNodeRotation(cluster, &autoscalingGroup, clientset, logger) - // if err != nil { - // return err - // } - - // logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - // err = finalCheck(&autoscalingGroup, clientset, logger) - // if err != nil { - // return err - // } - // } - // } - - autoscalingGroups, err := awsTools.GetAutoscalingGroups(cluster.ClusterID) - if err != nil { - return err + + if rotatorMetadata.MasterGroups == nil && rotatorMetadata.WorkerGroups == nil { + err = rotatorMetadata.GetSetAutoscalingGroups(cluster) + if err != nil { + return rotatorMetadata, err + } } - logger.Infof("Cluster with cluster ID %s is consisted of %d Autoscaling Groups", cluster.ClusterID, len(autoscalingGroups)) - for _, asg := range autoscalingGroups { - autoscalingGroup := AutoscalingGroup{} - err := autoscalingGroup.SetObject(asg) + for index, masterASG := range rotatorMetadata.MasterGroups { + logger.Infof("The autoscaling group %s has %d instance(s)", masterASG.Name, masterASG.DesiredCapacity) + + err = MasterNodeRotation(cluster, &masterASG, clientset, logger) if err != nil { - return err + rotatorMetadata.MasterGroups[index] = masterASG + return rotatorMetadata, err } - if strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateMasters { - logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + rotatorMetadata.MasterGroups[index] = masterASG - err = masterNodeRotation(cluster, &autoscalingGroup, clientset, logger) - if err != nil { - return err - } + logger.Infof("Checking that all %d nodes are running...", masterASG.DesiredCapacity) + err = FinalCheck(&masterASG, clientset, logger) + if err != nil { + return rotatorMetadata, err + } - logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - err = finalCheck(&autoscalingGroup, clientset, logger) - if err != nil { - return err - } + logger.Infof("ASG %s rotated successfully.", masterASG.Name) + } - logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) - } else if !strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateWorkers { - logger.Infof("The autoscaling group %s has %d instance(s)", autoscalingGroup.Name, autoscalingGroup.DesiredCapacity) + for index, workerASG := range rotatorMetadata.WorkerGroups { + logger.Infof("The autoscaling group %s has %d instance(s)", workerASG.Name, workerASG.DesiredCapacity) - err = workerNodeRotation(cluster, &autoscalingGroup, clientset, logger) - if err != nil { - return err - } + err = WorkerNodeRotation(cluster, &workerASG, clientset, logger) + if err != nil { + rotatorMetadata.WorkerGroups[index] = workerASG + return rotatorMetadata, err + } - logger.Infof("Checking that all %d nodes are running...", autoscalingGroup.DesiredCapacity) - err = finalCheck(&autoscalingGroup, clientset, logger) - if err != nil { - return err - } + rotatorMetadata.WorkerGroups[index] = workerASG - logger.Infof("ASG %s rotated successfully.", autoscalingGroup.Name) + logger.Infof("Checking that all %d nodes are running...", workerASG.DesiredCapacity) + err = FinalCheck(&workerASG, clientset, logger) + if err != nil { + return rotatorMetadata, err } + + logger.Infof("ASG %s rotated successfully.", workerASG.Name) } + logger.Info("All ASGs rotated successfully") - return nil + return rotatorMetadata, nil } -func finalCheck(autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { +// FinalCheck checks that rotation is complete. +func FinalCheck(autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { asg, err := awsTools.AutoScalingGroupReady(autoscalingGroup.Name, autoscalingGroup.DesiredCapacity, logger) if err != nil { return errors.Wrap(err, "Failed to get AutoscalingGroup ready") @@ -136,14 +113,15 @@ func finalCheck(autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Client return nil } -func masterNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { +// MasterNodeRotation handles rotation of master nodes. +func MasterNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { for len(autoscalingGroup.Nodes) > 0 { logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) nodesToRotate := []string{autoscalingGroup.Nodes[0]} - err := DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), clientset) + err := autoscalingGroup.DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), cluster.WaitBetweenDrains, clientset, logger, "master") if err != nil { return err } @@ -188,7 +166,8 @@ func masterNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGro return nil } -func workerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { +// WorkerNodeRotation handles rotation of worker nodes. +func WorkerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGroup, clientset *kubernetes.Clientset, logger *logrus.Entry) error { for len(autoscalingGroup.Nodes) > 0 { logger.Infof("The number of nodes in the ASG to be rotated is %d", len(autoscalingGroup.Nodes)) @@ -229,24 +208,11 @@ func workerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGro return err } - err = DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), clientset) - if err != nil { - return err - } - - err = awsTools.TerminateNodes(nodesToRotate, logger) + err = autoscalingGroup.DrainNodes(nodesToRotate, 10, int(cluster.EvictGracePeriod), cluster.WaitBetweenDrains, clientset, logger, "worker") if err != nil { return err } - err = k8sTools.DeleteClusterNodes(nodesToRotate, clientset) - if err != nil { - return err - } - - logger.Info("Removing nodes from rotation list") - autoscalingGroup.popNodes(nodesToRotate) - if len(autoscalingGroup.Nodes) > 0 { logger.Infof("Waiting for %d seconds before next node rotation", cluster.WaitBetweenRotations) time.Sleep(time.Duration(cluster.WaitBetweenRotations) * time.Second) From 5e1a4be5925b90646cd16635dcfdf7e0857e5bc8 Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Thu, 25 Feb 2021 11:57:36 +0000 Subject: [PATCH 5/7] Renaming node-rotator to rotator and adding readme --- Makefile | 2 +- README.md | 94 +++++++++++++++++++++++++++++++++++++++++- api/api.go | 4 +- api/handler.go | 2 +- cmd/rotator/rotator.go | 2 +- cmd/rotator/server.go | 4 +- go.mod | 2 +- rotator/helpers.go | 6 +-- rotator/rotator.go | 6 +-- 9 files changed, 106 insertions(+), 16 deletions(-) diff --git a/Makefile b/Makefile index 2ece1ac..094a4ad 100644 --- a/Makefile +++ b/Makefile @@ -7,7 +7,7 @@ DOCKER_BASE_IMAGE = alpine:3.13 # Variables GO = go -APP := node-rotator +APP := rotator APPNAME := node-rotator FLEET_CONTROLLER_IMAGE ?= mattermost/node-rotator:test diff --git a/README.md b/README.md index f26a311..a2ee7df 100644 --- a/README.md +++ b/README.md @@ -1,3 +1,93 @@ -# Node Rotator +# Rotator -Node Rotator is a tool meant to smooth and accelerate k8s cluster upgrades and node rotations. It offers automation on autoscaling group recognition and flexility on options such as, how fast to rotate nodes, drain retries, waiting time between rotation and drains as well as worker master node separation. +Rotator is a tool meant to smooth and accelerate k8s cluster upgrades and node rotations. It offers automation on autoscaling group recognition and flexility on options such as, how fast to rotate nodes, drain retries, waiting time between rotations and drains as well as mater/worker node separation. + +## How to use + +The rotator tool can be imported either as a go package and used in any app that needs to rotate/detach/drain k8s nodes or used as a cli tool, where the rotator server can accept rotation requests. + +### Import as Go package + +To import as a Go package both the [rotator]("github.com/mattermost/rotator/rotator") and the [model]("github.com/mattermost/rotator/model") should be imported. + +The rotator should be called with a cluster object like the one bellow: + +```golang +clusterRotator := rotatorModel.Cluster{ + ClusterID: , (string) + MaxScaling: , (int) + RotateMasters: , (bool) + RotateWorkers: , (bool) + MaxDrainRetries: , (int) + EvictGracePeriod: , (int) + WaitBetweenRotations: , (int) + WaitBetweenDrains: , (int) + ClientSet: , (*kubernetes.Clientset) + } +``` + +Calling the `InitRotateCluster` function of the rotator package with the defined clusterRotator object is all is needed to rotate a cluster. Example can be seen bellow: + +```golang +rotatorMetadata, err = rotator.InitRotateCluster(&clusterRotator, rotatorMetadata) + if err != nil { + cluster.ProvisionerMetadataKops.RotatorRequest.Status = rotatorMetadata + return err + } +``` + +where + +```golang +rotatorMetadata = &rotator.RotatorMetadata{} +``` + +The node rotator returns metadata that in case of rotation failure include information of ASGs pending rotation. This metadata can be passed back to the InitRotateCluster and the rotator will resume from where it left. + + +### Use Rotator as CLI tool + +The Rotator can be used as a docker image or as a local server. + +#### Building + +Simply run the following: + +```bash +go install ./cmd/rotator +alias cloud='$HOME/go/bin/rotator' +``` + +#### Running + +Run the server with: + +```bash +rotator server +``` + +In a different terminal/window, to rotate a cluster: +```bash +rotator cluster rotate --cluster --rotate-workers --rotate-masters --wait-between-rotations 30 --wait-between-drains 60 --max-scaling 4 --evict-grace-period 30 +``` + +You will get a response like this one: +```bash +[{ + "ClusterID": "", + "MaxScaling": 4, + "RotateMasters": true, + "RotateWorkers": true, + "MaxDrainRetries": 10, + "EvictGracePeriod": 30, + "WaitBetweenRotations": 30, + "WaitBetweenDrains": 30, + "ClientSet": null +} +``` + +### Other Setup + +For the rotator to run access to both the AWS account and the K8s cluster is required to be able to do actions such as, `DescribeInstances`, `DetachInstances`, `TerminateInstances`, `DescribeAutoScalingGroups`, as well as `drain`, `kill`, `evict` pods, etc. + +The relevant AWS Access and Secret key pair should be exported and k8s access should be provided via a passed clientset or a locally exported k8s config. diff --git a/api/api.go b/api/api.go index 1b9c0ea..10427be 100644 --- a/api/api.go +++ b/api/api.go @@ -4,8 +4,8 @@ import ( "net/http" "github.com/gorilla/mux" - "github.com/mattermost/node-rotator/model" - rotator "github.com/mattermost/node-rotator/rotator" + "github.com/mattermost/rotator/model" + rotator "github.com/mattermost/rotator/rotator" ) // Register registers the API endpoints on the given router. diff --git a/api/handler.go b/api/handler.go index 9b1f09d..56ee110 100644 --- a/api/handler.go +++ b/api/handler.go @@ -3,7 +3,7 @@ package api import ( "net/http" - "github.com/mattermost/node-rotator/model" + "github.com/mattermost/rotator/model" log "github.com/sirupsen/logrus" ) diff --git a/cmd/rotator/rotator.go b/cmd/rotator/rotator.go index 4749dda..78f6bb8 100644 --- a/cmd/rotator/rotator.go +++ b/cmd/rotator/rotator.go @@ -4,7 +4,7 @@ import ( "encoding/json" "os" - "github.com/mattermost/node-rotator/model" + "github.com/mattermost/rotator/model" "github.com/pkg/errors" "github.com/spf13/cobra" ) diff --git a/cmd/rotator/server.go b/cmd/rotator/server.go index c662ac1..e78e21a 100644 --- a/cmd/rotator/server.go +++ b/cmd/rotator/server.go @@ -9,8 +9,8 @@ import ( "time" "github.com/gorilla/mux" - "github.com/mattermost/node-rotator/api" - "github.com/mattermost/node-rotator/model" + "github.com/mattermost/rotator/api" + "github.com/mattermost/rotator/model" "github.com/sirupsen/logrus" "github.com/spf13/cobra" diff --git a/go.mod b/go.mod index a63af78..3ad9e64 100644 --- a/go.mod +++ b/go.mod @@ -1,4 +1,4 @@ -module github.com/mattermost/node-rotator +module github.com/mattermost/rotator go 1.15 diff --git a/rotator/helpers.go b/rotator/helpers.go index 358d760..2442bb5 100644 --- a/rotator/helpers.go +++ b/rotator/helpers.go @@ -6,9 +6,9 @@ import ( "time" "github.com/aws/aws-sdk-go/service/autoscaling" - awsTools "github.com/mattermost/node-rotator/aws" - k8sTools "github.com/mattermost/node-rotator/k8s" - "github.com/mattermost/node-rotator/model" + awsTools "github.com/mattermost/rotator/aws" + k8sTools "github.com/mattermost/rotator/k8s" + "github.com/mattermost/rotator/model" "github.com/pkg/errors" "github.com/sirupsen/logrus" corev1 "k8s.io/api/core/v1" diff --git a/rotator/rotator.go b/rotator/rotator.go index 58caed7..89bb55a 100644 --- a/rotator/rotator.go +++ b/rotator/rotator.go @@ -3,9 +3,9 @@ package rotator import ( "time" - awsTools "github.com/mattermost/node-rotator/aws" - k8sTools "github.com/mattermost/node-rotator/k8s" - "github.com/mattermost/node-rotator/model" + awsTools "github.com/mattermost/rotator/aws" + k8sTools "github.com/mattermost/rotator/k8s" + "github.com/mattermost/rotator/model" "github.com/pkg/errors" "github.com/sirupsen/logrus" "k8s.io/client-go/kubernetes" From bd0bd7f36274e5577e15810df4628c2142431cc4 Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Fri, 26 Feb 2021 11:18:23 +0000 Subject: [PATCH 6/7] Code improvements, cleanup and nits --- Makefile | 8 ++------ README.md | 4 ++-- api/api.go | 5 +++-- cmd/rotator/main.go | 4 ++-- cmd/rotator/rotator.go | 4 ++-- cmd/rotator/server.go | 2 +- model/rotate_request.go | 22 +++++++++++++++++++++- rotator/drain.go | 10 +++++----- rotator/rotator.go | 4 ++-- 9 files changed, 40 insertions(+), 23 deletions(-) diff --git a/Makefile b/Makefile index 094a4ad..0ad19a9 100644 --- a/Makefile +++ b/Makefile @@ -11,10 +11,6 @@ APP := rotator APPNAME := node-rotator FLEET_CONTROLLER_IMAGE ?= mattermost/node-rotator:test -# Build variables -COMMIT_HASH ?= $(shell git rev-parse HEAD) -BUILD_DATE ?= $(shell date +%FT%T%z) - ################################################################################ export GO111MODULE=on @@ -38,13 +34,13 @@ unittest: # Build for distribution .PHONY: build build: - @echo Building Mattermost Node Rotator + @echo Building Mattermost Rotator env GOOS=linux GOARCH=amd64 $(GO) build -o $(APPNAME) ./cmd/$(APP) # Builds the docker image .PHONY: build-image build-image: - @echo Building Node Rotator Docker Image + @echo Building Rotator Docker Image docker build \ --build-arg DOCKER_BUILD_IMAGE=$(DOCKER_BUILD_IMAGE) \ --build-arg DOCKER_BASE_IMAGE=$(DOCKER_BASE_IMAGE) \ diff --git a/README.md b/README.md index a2ee7df..8a61e9d 100644 --- a/README.md +++ b/README.md @@ -29,7 +29,7 @@ clusterRotator := rotatorModel.Cluster{ Calling the `InitRotateCluster` function of the rotator package with the defined clusterRotator object is all is needed to rotate a cluster. Example can be seen bellow: ```golang -rotatorMetadata, err = rotator.InitRotateCluster(&clusterRotator, rotatorMetadata) +rotatorMetadata, err = rotator.InitRotateCluster(&clusterRotator, rotatorMetadata, logger) if err != nil { cluster.ProvisionerMetadataKops.RotatorRequest.Status = rotatorMetadata return err @@ -42,7 +42,7 @@ where rotatorMetadata = &rotator.RotatorMetadata{} ``` -The node rotator returns metadata that in case of rotation failure include information of ASGs pending rotation. This metadata can be passed back to the InitRotateCluster and the rotator will resume from where it left. +The rotator returns metadata that in case of rotation failure include information of ASGs pending rotation. This metadata can be passed back to the InitRotateCluster and the rotator will resume from where it left. ### Use Rotator as CLI tool diff --git a/api/api.go b/api/api.go index 10427be..5a619b6 100644 --- a/api/api.go +++ b/api/api.go @@ -25,7 +25,7 @@ func initCluster(apiRouter *mux.Router, context *Context) { clustersRouter.Handle("", addContext(handleRotateCluster)).Methods("POST") } -// handleRotateCluster responds to POST /api/rotate, beginning the process of creating a new RDS Aurora cluster. +// handleRotateCluster responds to POST /api/rotate, beginning the process of rotating a k8s cluster. // sample body: // { // "clusterID": "12345678", @@ -38,6 +38,7 @@ func initCluster(apiRouter *mux.Router, context *Context) { // "WaitBetweenDrains": 60, // } func handleRotateCluster(c *Context, w http.ResponseWriter, r *http.Request) { + rotateClusterRequest, err := model.NewRotateClusterRequestFromReader(r.Body) if err != nil { c.Logger.WithError(err).Error("failed to decode request") @@ -58,7 +59,7 @@ func handleRotateCluster(c *Context, w http.ResponseWriter, r *http.Request) { rotatorMetada := rotator.RotatorMetadata{} - go rotator.InitRotateCluster(&cluster, &rotatorMetada) + go rotator.InitRotateCluster(&cluster, &rotatorMetada, c.Logger.WithField("cluster", cluster.ClusterID)) w.Header().Set("Content-Type", "application/json") w.WriteHeader(http.StatusAccepted) diff --git a/cmd/rotator/main.go b/cmd/rotator/main.go index b618d73..29c0a28 100644 --- a/cmd/rotator/main.go +++ b/cmd/rotator/main.go @@ -1,4 +1,4 @@ -// Package main is the entry point to the Mattermost Node Rotator server and CLI. +// Package main is the entry point to the Mattermost Rotator server and CLI. package main import ( @@ -9,7 +9,7 @@ import ( var rootCmd = &cobra.Command{ Use: "rotator", - Short: "Node Rotator is a tool to rotate K8s cluster nodes", + Short: "Rotator is a tool to rotate K8s cluster nodes", Run: func(cmd *cobra.Command, args []string) { serverCmd.RunE(cmd, args) }, diff --git a/cmd/rotator/rotator.go b/cmd/rotator/rotator.go index 78f6bb8..d771023 100644 --- a/cmd/rotator/rotator.go +++ b/cmd/rotator/rotator.go @@ -10,7 +10,7 @@ import ( ) func init() { - clusterCmd.PersistentFlags().String("server", "http://localhost:8079", "The Node Rotator server whose API will be queried.") + clusterCmd.PersistentFlags().String("server", "http://localhost:8079", "The Rotator server whose API will be queried.") rotatorCmd.Flags().String("cluster", "", "the cluster ID of the cluster to go through node rotation") rotatorCmd.Flags().Int("max-scaling", 1, "the max number of nodes rotating in parallel") @@ -26,7 +26,7 @@ func init() { var clusterCmd = &cobra.Command{ Use: "cluster", - Short: "Rotate cluster nodes by the node rotator server.", + Short: "Rotate cluster nodes by the rotator server.", } // TODO: Add node handling capabilities diff --git a/cmd/rotator/server.go b/cmd/rotator/server.go index e78e21a..3b37b87 100644 --- a/cmd/rotator/server.go +++ b/cmd/rotator/server.go @@ -40,7 +40,7 @@ func serverCmdF(command *cobra.Command, args []string) error { } logger := logger.WithField("instance", instanceID) - logger.Info("Starting Mattermost Node Rotator Server") + logger.Info("Starting Mattermost Rotator Server") router := mux.NewRouter() diff --git a/model/rotate_request.go b/model/rotate_request.go index 0ca9fa3..694f815 100644 --- a/model/rotate_request.go +++ b/model/rotate_request.go @@ -39,7 +39,27 @@ func NewRotateClusterRequestFromReader(reader io.Reader) (*RotateClusterRequest, // Validate validates the values of a cluster rotate request. func (request *RotateClusterRequest) Validate() error { if request.ClusterID == "" { - return errors.Errorf("Cluster ID cannot be empty") + return errors.New("Cluster ID cannot be empty") + } + + if request.MaxScaling < 1 { + return errors.New("Max scaling cannot be 0 or negative") + } + + if request.MaxDrainRetries < 0 { + return errors.New("Max drain retries cannot be negative") + } + + if request.EvictGracePeriod < 0 { + return errors.New("Evict grace period cannot be negative") + } + + if request.WaitBetweenRotations < 0 { + return errors.New("Wait between rotations cannot be negative") + } + + if request.WaitBetweenDrains < 0 { + return errors.New("Wait between drains cannot be negative") } return nil diff --git a/rotator/drain.go b/rotator/drain.go index ae9a11b..9cba978 100644 --- a/rotator/drain.go +++ b/rotator/drain.go @@ -106,7 +106,7 @@ const ( kUnmanagedWarning = "Deleting pods not managed by ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet" ) -func Drain(client kubernetes.Interface, nodes []*corev1.Node, options *DrainOptions) (err error) { +func Drain(client kubernetes.Interface, nodes []*corev1.Node, options *DrainOptions) error { nodeInterface := client.CoreV1().Nodes() for _, node := range nodes { err := Cordon(nodeInterface, node) @@ -124,8 +124,7 @@ func Drain(client kubernetes.Interface, nodes []*corev1.Node, options *DrainOpti drainedNodes.Insert(node.Name) logger.Infof("Drained node %q", node.Name) } else { - logger.Error(err) - logger.Errorf("Unable to drain node %q", node.Name) + logger.WithError(err).Errorf("Unable to drain node %q", node.Name) remainingNodes := []string{} fatal = err for _, remainingNode := range nodes { @@ -267,7 +266,7 @@ func (ps podStatuses) message() string { // getPodsForDeletion receives resource info for a node, and returns all the pods from the given node that we // are planning on deleting. If there are any pods preventing us from deleting, we return that list in an error. -func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options *DrainOptions) (pods []corev1.Pod, err error) { +func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options *DrainOptions) ([]corev1.Pod, error) { ctx := context.TODO() listOptions := metav1.ListOptions{ @@ -278,7 +277,7 @@ func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options } podList, err := client.CoreV1().Pods(options.Namespace).List(ctx, listOptions) if err != nil { - return pods, err + return nil, err } ws := podStatuses{} @@ -290,6 +289,7 @@ func getPodsForDeletion(client kubernetes.Interface, node *corev1.Node, options ignoreDaemonSets: options.IgnoreDaemonsets, } + var pods []corev1.Pod for _, pod := range podList.Items { podOk := true for _, filt := range []podFilter{daemonSetOptions.daemonSetFilter, mirrorPodFilter, options.localStorageFilter, options.unreplicatedFilter} { diff --git a/rotator/rotator.go b/rotator/rotator.go index 89bb55a..c9ecafa 100644 --- a/rotator/rotator.go +++ b/rotator/rotator.go @@ -25,10 +25,10 @@ type RotatorMetadata struct { } // InitRotateCluster is used to call the RotateCluster function. -func InitRotateCluster(cluster *model.Cluster, rotatorMetadata *RotatorMetadata) (*RotatorMetadata, error) { - logger := logger.WithField("cluster", cluster.ClusterID) +func InitRotateCluster(cluster *model.Cluster, rotatorMetadata *RotatorMetadata, logger *logrus.Entry) (*RotatorMetadata, error) { rotatorMetadata, err := RotateCluster(cluster, logger, rotatorMetadata) if err != nil { + logger.WithError(err).Error("failed to rotate cluster") return rotatorMetadata, err } From e08ffc4bb5905ac8e3bf48e2d789669cc81dc94e Mon Sep 17 00:00:00 2001 From: Stylianos Rigas Date: Mon, 1 Mar 2021 11:28:52 +0000 Subject: [PATCH 7/7] Code improvements and cleanup --- .gitignore | 3 +++ Makefile | 15 ++++++++++----- build/Dockerfile | 36 ++++++++++++++++++++++++++++++++++++ build/bin/entrypoint | 12 ++++++++++++ build/bin/user_setup | 16 ++++++++++++++++ cmd/rotator/server.go | 2 +- k8s/helpers.go | 4 +++- rotator/helpers.go | 25 ++++++++++++------------- rotator/rotator.go | 8 +------- 9 files changed, 94 insertions(+), 27 deletions(-) create mode 100644 .gitignore create mode 100644 build/Dockerfile create mode 100755 build/bin/entrypoint create mode 100755 build/bin/user_setup diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9175d62 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +coverage.out +.vscode +build/_output/ diff --git a/Makefile b/Makefile index 0ad19a9..d2a8ab8 100644 --- a/Makefile +++ b/Makefile @@ -2,20 +2,20 @@ # See LICENSE.txt for license information. ## Docker Build Versions -DOCKER_BUILD_IMAGE = golang:1.15.7 +DOCKER_BUILD_IMAGE = golang:1.15.8 DOCKER_BASE_IMAGE = alpine:3.13 # Variables GO = go APP := rotator APPNAME := node-rotator -FLEET_CONTROLLER_IMAGE ?= mattermost/node-rotator:test +ROTATOR_IMAGE ?= mattermost/node-rotator:test ################################################################################ export GO111MODULE=on -all: check-style unittest +all: check-style unittest fmt .PHONY: check-style check-style: govet @@ -27,6 +27,10 @@ govet: $(GO) vet ./... @echo Govet success +.PHONY: fmt +fmt: ## Run go fmt against code + go fmt ./... + .PHONY: unittest unittest: $(GO) test ./... -v -covermode=count -coverprofile=coverage.out @@ -35,7 +39,8 @@ unittest: .PHONY: build build: @echo Building Mattermost Rotator - env GOOS=linux GOARCH=amd64 $(GO) build -o $(APPNAME) ./cmd/$(APP) + GOOS=linux GOARCH=amd64 CGO_ENABLED=0 $(GO) build -gcflags all=-trimpath=$(PWD) -asmflags all=-trimpath=$(PWD) -a -installsuffix cgo -o build/_output/bin/$(APP) ./cmd/$(APP) + # Builds the docker image .PHONY: build-image @@ -45,5 +50,5 @@ build-image: --build-arg DOCKER_BUILD_IMAGE=$(DOCKER_BUILD_IMAGE) \ --build-arg DOCKER_BASE_IMAGE=$(DOCKER_BASE_IMAGE) \ . -f build/Dockerfile \ - -t $(FLEET_CONTROLLER_IMAGE) \ + -t $(ROTATOR_IMAGE) \ --no-cache diff --git a/build/Dockerfile b/build/Dockerfile new file mode 100644 index 0000000..6519316 --- /dev/null +++ b/build/Dockerfile @@ -0,0 +1,36 @@ +# Build the mattermost rotator +ARG DOCKER_BUILD_IMAGE=golang:1.15.8 +ARG DOCKER_BASE_IMAGE=alpine:3.13 + +FROM ${DOCKER_BUILD_IMAGE} AS build +WORKDIR /rotator/ +COPY . /rotator/ +RUN apt-get update -yq && apt-get install -yq unzip +RUN make build + + +# Final Image +FROM ${DOCKER_BASE_IMAGE} +LABEL name="Mattermost Rotator" \ + maintainer="cloud-team@mattermost.com" \ + vendor="Mattermost" \ + distribution-scope="public" \ + architecture="x86_64" \ + url="https://mattermost.com" \ + io.k8s.description="Mattermost Rotator accelerates k8s cluster node rotations" \ + io.k8s.display-name="Mattermost Rotator" + +ENV ROTATOR=/rotator/rotator \ + USER_UID=10001 \ + USER_NAME=rotator + +RUN apk update && apk add libc6-compat && apk add ca-certificates +COPY --from=build /rotator/build/_output/bin/rotator /rotator/rotator +COPY --from=build /rotator/build/bin /usr/local/bin + +RUN /usr/local/bin/user_setup +WORKDIR /rotator/ + +ENTRYPOINT ["/usr/local/bin/entrypoint"] + +USER ${USER_UID} diff --git a/build/bin/entrypoint b/build/bin/entrypoint new file mode 100755 index 0000000..3760c56 --- /dev/null +++ b/build/bin/entrypoint @@ -0,0 +1,12 @@ +#!/bin/sh -e + +# This is documented here: +# https://docs.openshift.com/container-platform/3.11/creating_images/guidelines.html#openshift-specific-guidelines + +if ! whoami &>/dev/null; then + if [ -w /etc/passwd ]; then + echo "${USER_NAME:-rotator}:x:$(id -u):$(id -g):${USER_NAME:-rotator} user:${HOME}:/sbin/nologin" >> /etc/passwd + fi +fi + +exec ${ROTATOR} $@ diff --git a/build/bin/user_setup b/build/bin/user_setup new file mode 100755 index 0000000..f89a315 --- /dev/null +++ b/build/bin/user_setup @@ -0,0 +1,16 @@ +#!/bin/sh +set -euo pipefail + +# ensure $HOME exists and is accessible by group 0 (we don't know what the runtime UID will be) +mkdir -p ${HOME} +chown ${USER_UID}:0 ${HOME} +chmod ug+rwx ${HOME} + +chown -R ${USER_UID}:0 /rotator/* +chmod -R ug+rwx /rotator/* + +# runtime user will need to be able to self-insert in /etc/passwd +chmod g+rw /etc/passwd + +# no need for this script to remain in the image after running +rm $0 diff --git a/cmd/rotator/server.go b/cmd/rotator/server.go index 3b37b87..59f393b 100644 --- a/cmd/rotator/server.go +++ b/cmd/rotator/server.go @@ -20,7 +20,7 @@ var instanceID string var serverCmd = &cobra.Command{ Use: "server", - Short: "Runs the node rotaror API server", + Short: "Runs the node rotator API server", RunE: serverCmdF, } diff --git a/k8s/helpers.go b/k8s/helpers.go index 7caa51b..e915e69 100644 --- a/k8s/helpers.go +++ b/k8s/helpers.go @@ -46,8 +46,10 @@ func WaitForNodeRunning(ctx context.Context, nodeName string, clientset *kuberne } } } - if err != nil && k8sErrors.IsNotFound(err) { + if k8sErrors.IsNotFound(err) { logger.Infof("Node %s not found, waiting...", nodeName) + } else if err != nil { + logger.WithError(err).Errorf("Error while waiting for node %s to become ready...", nodeName) } select { diff --git a/rotator/helpers.go b/rotator/helpers.go index 2442bb5..3a8dd66 100644 --- a/rotator/helpers.go +++ b/rotator/helpers.go @@ -19,12 +19,14 @@ import ( // newNodes separates old nodes from new in a provided slice and returns new. func newNodes(allNodes, oldNodes []string) []string { + mb := make(map[string]struct{}, len(oldNodes)) + for _, x := range oldNodes { + mb[x] = struct{}{} + } var newNodes []string - for _, node := range allNodes { - for _, oldNode := range oldNodes { - if node != oldNode { - newNodes = append(newNodes, node) - } + for _, x := range allNodes { + if _, found := mb[x]; !found { + newNodes = append(newNodes, x) } } return newNodes @@ -86,13 +88,12 @@ func (autoscalingGroup *AutoscalingGroup) DrainNodes(nodesToDrain []string, atte return errors.Wrapf(err, "Failed to get node %s", nodeToDrain) } else { err = Drain(clientset, []*corev1.Node{node}, drainOptions) + for i := 1; i < attempts && err != nil; i++ { + logger.Warnf("Failed to drain node %q on attempt %d, retrying up to %d times", nodesToDrain, i, attempts) + err = Drain(clientset, []*corev1.Node{node}, drainOptions) + } if err != nil { - if attempts--; attempts > 0 { - logger.Infof("Node %s drain failed, retrying...", nodeToDrain) - autoscalingGroup.DrainNodes([]string{nodeToDrain}, attempts-1, gracePeriod, wait, clientset, logger, nodeType) - } else { - return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) - } + return errors.Wrapf(err, "Failed to drain node %s", nodeToDrain) } logger.Infof("Node %s drained successfully", nodeToDrain) } @@ -145,7 +146,6 @@ func (metadata *RotatorMetadata) GetSetAutoscalingGroups(cluster *model.Cluster) return err } logger.Infof("Cluster with cluster ID %s is consisted of %d Autoscaling Groups", cluster.ClusterID, len(asgs)) - var autoscalingGroups []AutoscalingGroup for _, asg := range asgs { autoscalingGroup := AutoscalingGroup{} @@ -159,7 +159,6 @@ func (metadata *RotatorMetadata) GetSetAutoscalingGroups(cluster *model.Cluster) } else if !strings.Contains(autoscalingGroup.Name, "master") && cluster.RotateWorkers { metadata.WorkerGroups = append(metadata.WorkerGroups, autoscalingGroup) } - autoscalingGroups = append(autoscalingGroups, autoscalingGroup) } return nil } diff --git a/rotator/rotator.go b/rotator/rotator.go index c9ecafa..d61a60d 100644 --- a/rotator/rotator.go +++ b/rotator/rotator.go @@ -150,9 +150,6 @@ func MasterNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGro } newNodes := newNodes(nodeHostnames, autoscalingGroup.Nodes) - if err != nil { - return err - } err = k8sTools.NodesReady(newNodes, clientset, logger) if err != nil { @@ -175,7 +172,7 @@ func WorkerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGro var nodesToRotate []string if len(autoscalingGroup.Nodes) < int(cluster.MaxScaling) { - nodesToRotate = autoscalingGroup.Nodes[:len(autoscalingGroup.Nodes)] + nodesToRotate = autoscalingGroup.Nodes } else { nodesToRotate = autoscalingGroup.Nodes[:int(cluster.MaxScaling)] } @@ -199,9 +196,6 @@ func WorkerNodeRotation(cluster *model.Cluster, autoscalingGroup *AutoscalingGro } newNodes := newNodes(nodeHostnames, autoscalingGroup.Nodes) - if err != nil { - return err - } err = k8sTools.NodesReady(newNodes, clientset, logger) if err != nil {