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rpc.go
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rpc.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package api
import (
"bufio"
"context"
"encoding/json"
"fmt"
"io"
"os"
"regexp"
"time"
"github.com/bcicen/jstream"
"github.com/dustin/go-humanize"
"github.com/spf13/pflag"
"go.uber.org/atomic"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/emptypb"
"google.golang.org/protobuf/types/known/timestamppb"
"namespacelabs.dev/foundation/framework/jsonreparser"
"namespacelabs.dev/foundation/internal/compute"
"namespacelabs.dev/foundation/internal/console"
"namespacelabs.dev/foundation/internal/fnapi"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/std/tasks"
)
type API struct {
StartCreateKubernetesCluster fnapi.Call[CreateKubernetesClusterRequest]
CreateContainers fnapi.Call[CreateContainersRequest]
StartContainers fnapi.Call[StartContainersRequest]
GetKubernetesCluster fnapi.Call[GetKubernetesClusterRequest]
EnsureKubernetesCluster fnapi.Call[EnsureKubernetesClusterRequest]
WaitKubernetesCluster fnapi.Call[WaitKubernetesClusterRequest]
ListKubernetesClusters fnapi.Call[ListKubernetesClustersRequest]
DestroyKubernetesCluster fnapi.Call[DestroyKubernetesClusterRequest]
SuspendKubernetesCluster fnapi.Call[SuspendKubernetesClusterRequest]
ReleaseKubernetesCluster fnapi.Call[ReleaseKubernetesClusterRequest]
WakeKubernetesCluster fnapi.Call[WakeKubernetesClusterRequest]
RefreshKubernetesCluster fnapi.Call[RefreshKubernetesClusterRequest]
GetKubernetesClusterSummary fnapi.Call[GetKubernetesClusterSummaryRequest]
GetKubernetesConfig fnapi.Call[GetKubernetesConfigRequest]
GetImageRegistry fnapi.Call[emptypb.Empty]
TailClusterLogs fnapi.Call[TailLogsRequest]
GetClusterLogs fnapi.Call[GetLogsRequest]
GetProfile fnapi.Call[emptypb.Empty]
RegisterIngress fnapi.Call[RegisterIngressRequest]
}
var (
Methods = MakeAPI()
rpcEndpointOverride string
RegionName string
)
func SetupFlags(prefix string, flags *pflag.FlagSet, hide bool) {
endpointFlag := fmt.Sprintf("%sendpoint", prefix)
regionFlag := fmt.Sprintf("%sregion", prefix)
flags.StringVar(&rpcEndpointOverride, endpointFlag, "", "Where to dial to when reaching nscloud.")
flags.StringVar(&RegionName, regionFlag, "fra1", "Which region to use.")
if hide {
_ = flags.MarkHidden(endpointFlag)
_ = flags.MarkHidden(regionFlag)
}
}
func ResolveEndpoint(ctx context.Context, tok fnapi.Token) (string, error) {
if rpcEndpointOverride != "" {
return rpcEndpointOverride, nil
}
if rpcEndpoint := os.Getenv("NSC_ENDPOINT"); rpcEndpoint != "" {
return rpcEndpoint, nil
}
if tok == nil {
return "", fnerrors.New("a token is required")
}
claims, err := fnapi.Claims(tok)
if err != nil {
return "", err
}
if claims.PrimaryRegion != "" {
return "https://api." + claims.PrimaryRegion, nil
}
rpcEndpoint := fmt.Sprintf("https://api.%s.nscluster.cloud", RegionName)
return rpcEndpoint, nil
}
func MakeAPI() API {
return API{
StartCreateKubernetesCluster: fnapi.Call[CreateKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/StartCreateKubernetesCluster",
},
CreateContainers: fnapi.Call[CreateContainersRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/CreateContainers",
},
StartContainers: fnapi.Call[StartContainersRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/StartContainers",
},
GetKubernetesCluster: fnapi.Call[GetKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/GetKubernetesCluster",
},
EnsureKubernetesCluster: fnapi.Call[EnsureKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/EnsureKubernetesCluster",
},
WaitKubernetesCluster: fnapi.Call[WaitKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/WaitKubernetesCluster",
},
ListKubernetesClusters: fnapi.Call[ListKubernetesClustersRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/ListKubernetesClusters",
},
DestroyKubernetesCluster: fnapi.Call[DestroyKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/DestroyKubernetesCluster",
},
SuspendKubernetesCluster: fnapi.Call[SuspendKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/SuspendKubernetesCluster",
},
ReleaseKubernetesCluster: fnapi.Call[ReleaseKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/ReleaseKubernetesCluster",
},
WakeKubernetesCluster: fnapi.Call[WakeKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/WakeKubernetesCluster",
},
RefreshKubernetesCluster: fnapi.Call[RefreshKubernetesClusterRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/RefreshKubernetesCluster",
},
GetKubernetesClusterSummary: fnapi.Call[GetKubernetesClusterSummaryRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/GetKubernetesClusterSummary",
},
GetKubernetesConfig: fnapi.Call[GetKubernetesConfigRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/GetKubernetesConfig",
},
GetImageRegistry: fnapi.Call[emptypb.Empty]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/GetImageRegistry",
},
TailClusterLogs: fnapi.Call[TailLogsRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.logging.LoggingService/TailLogs",
},
GetClusterLogs: fnapi.Call[GetLogsRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.logging.LoggingService/GetLogs",
},
GetProfile: fnapi.Call[emptypb.Empty]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/GetProfile",
},
RegisterIngress: fnapi.Call[RegisterIngressRequest]{
FetchToken: fnapi.FetchToken,
Method: "nsl.vm.api.VMService/RegisterIngress",
},
}
}
type CreateClusterResult struct {
ClusterId string
Cluster *KubernetesCluster
Registry *ImageRegistry
BuildCluster *BuildCluster
Deadline *time.Time
}
type CreateClusterOpts struct {
MachineType string
// Whether to keep the cluster alive, regardless of it being ephemeral.
// This is typically needed if you want to execute multiple ns commands on an ephemeral cluster.
KeepAtExit bool
Purpose string
Features []string
AuthorizedSshKeys []string
UniqueTag string
InternalExtra string
Deadline *timestamppb.Timestamp
Experimental any
WaitClusterOpts
}
type WaitClusterOpts struct {
CreateLabel string // Used as human-facing label, e.g. "Creating Environment: ..."
WaitKind string // One of kubernetes, buildcluster, or something else.
WaitForService string
}
func (w WaitClusterOpts) label() string {
if w.CreateLabel == "" {
return "Creating Environment"
}
return w.CreateLabel
}
func CreateCluster(ctx context.Context, api API, opts CreateClusterOpts) (*StartCreateKubernetesClusterResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.cluster-create").HumanReadablef(opts.label()), func(ctx context.Context) (*StartCreateKubernetesClusterResponse, error) {
req := CreateKubernetesClusterRequest{
DocumentedPurpose: opts.Purpose,
MachineType: opts.MachineType,
Feature: opts.Features,
AuthorizedSshKeys: opts.AuthorizedSshKeys,
UniqueTag: opts.UniqueTag,
InternalExtra: opts.InternalExtra,
Deadline: opts.Deadline,
Experimental: opts.Experimental,
Interactive: true,
}
var response StartCreateKubernetesClusterResponse
if err := api.StartCreateKubernetesCluster.Do(ctx, req, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, fnerrors.New("failed to create cluster: %w", err)
}
tasks.Attachments(ctx).AddResult("cluster_id", response.ClusterId)
if response.ClusterFragment != nil {
if shape := response.ClusterFragment.Shape; shape != nil {
tasks.Attachments(ctx).
AddResult("cluster_cpu", shape.VirtualCpu).
AddResult("cluster_ram", humanize.IBytes(uint64(shape.MemoryMegabytes)*humanize.MiByte))
}
}
if !opts.KeepAtExit {
compute.On(ctx).Cleanup(tasks.Action("nscloud.cluster-cleanup"), func(ctx context.Context) error {
if err := DestroyCluster(ctx, api, response.ClusterId); err != nil {
// The cluster being gone is an acceptable state (it could have
// been deleted by DeleteRecursively for example).
if status.Code(err) == codes.NotFound {
return nil
}
}
return nil
})
}
return &response, nil
})
}
func CreateAndWaitCluster(ctx context.Context, api API, opts CreateClusterOpts) (*CreateClusterResult, error) {
cluster, err := CreateCluster(ctx, api, opts)
if err != nil {
return nil, err
}
return WaitCluster(ctx, api, cluster.ClusterId, opts.WaitClusterOpts)
}
func CreateBuildCluster(ctx context.Context, api API, platform BuildPlatform) (*CreateClusterResult, error) {
featuresList := []string{"BUILD_CLUSTER"}
featuresList = append(featuresList, buildClusterFeatures(platform)...)
return CreateAndWaitCluster(ctx, api, CreateClusterOpts{
Purpose: "Build machine",
Features: featuresList,
KeepAtExit: true,
WaitClusterOpts: WaitClusterOpts{
CreateLabel: fmt.Sprintf("Creating %s Build Cluster", platform),
WaitForService: "buildkit",
WaitKind: "buildcluster",
},
})
}
func buildClusterFeatures(platform BuildPlatform) []string {
if platform == "arm64" {
return []string{"EXP_ARM64_CLUSTER"}
}
return nil
}
func WaitCluster(ctx context.Context, api API, clusterId string, opts WaitClusterOpts) (*CreateClusterResult, error) {
ctx, done := context.WithTimeout(ctx, 15*time.Minute) // Wait for cluster creation up to 15 minutes.
defer done()
var cr *CreateKubernetesClusterResponse
if err := tasks.Action("nscloud.cluster-wait").HumanReadablef(opts.label()).Arg("cluster_id", clusterId).Run(ctx, func(ctx context.Context) error {
var progress clusterCreateProgress
progress.status.Store(stageHumanLabel("CREATE_ACCEPTED_WAITING_FOR_ALLOCATION", opts.WaitKind))
tasks.Attachments(ctx).SetProgress(&progress)
lastStatus := "<none>"
tries := 0
for {
// We continue to wait for the cluster to become ready until we observe a READY.
if err := api.WaitKubernetesCluster.Do(ctx, WaitKubernetesClusterRequest{ClusterId: clusterId}, ResolveEndpoint, func(body io.Reader) error {
// If we get a payload, reset the number of tries.
tries = 0
decoder := jstream.NewDecoder(body, 1)
// jstream gives us the streamed array segmentation, however it
// returns map[string]interface{} rather than typed objects. We
// re-trigger parsing into the response type so the remainder of
// our codebase operates on types.
for mv := range decoder.Stream() {
var resp CreateKubernetesClusterResponse
if err := jsonreparser.Reparse(mv.Value, &resp); err != nil {
return fnerrors.InvocationError("nscloud", "failed to parse response: %w", err)
}
progress.set(stageHumanLabel(resp.Status, opts.WaitKind))
lastStatus = resp.Status
if resp.ClusterId != "" {
clusterId = resp.ClusterId
}
ready := resp.Status == "READY"
if opts.WaitForService != "" {
svc := ClusterService(resp.Cluster, opts.WaitForService)
if svc != nil && svc.Status == "READY" {
ready = true
}
}
if ready {
cr = &resp
return nil
}
}
return fnerrors.InvocationError("nscloud", "stream closed before cluster became ready")
}); err != nil {
tries++
if tries >= 3 {
return fnerrors.InvocationError("nscloud", "cluster never became ready (last status was %q, cluster id: %s): %w", lastStatus, clusterId, err)
}
}
if cr != nil {
break
}
if err := ctx.Err(); err != nil {
return err // Check if we've been cancelled.
}
time.Sleep(time.Second)
}
if cr.Cluster.EndpointAddress != "" {
tasks.Attachments(ctx).AddResult("cluster_address", cr.Cluster.EndpointAddress)
}
tasks.Attachments(ctx).AddResult("deadline", cr.Cluster.Deadline)
return nil
}); err != nil {
return nil, err
}
result := &CreateClusterResult{
ClusterId: cr.ClusterId,
Cluster: cr.Cluster,
Registry: cr.Registry,
BuildCluster: cr.BuildCluster,
}
if cr.Deadline != "" {
t, err := time.Parse(time.RFC3339, cr.Deadline)
if err == nil {
result.Deadline = &t
}
}
return result, nil
}
func stageHumanLabel(stage, kind string) string {
switch stage {
case "CREATE_ACCEPTED_WAITING_FOR_ALLOCATION":
return "Waiting for resources"
case "COMMITTED":
return "Assigning machine"
case "NAMESPACE_CREATED":
return "Starting isolated environment"
case "NAMESPACE_READY":
return "Waiting for core services"
case "CORE_SERVICES_READY":
switch kind {
case "kubernetes":
return "Waiting for Kubernetes"
case "buildcluster":
return "Waiting for build cluster"
default:
return "Waiting for containers"
}
case "KUBERNETES_READY", "KUBERNETES_LOAD_BALANCER_READY":
return "Waiting to settle"
case "BUILD_CLUSTER_READY":
return "Waiting to settle"
}
return stage
}
func ClusterService(cluster *KubernetesCluster, name string) *Cluster_ServiceState {
if cluster == nil {
return nil
}
for _, srv := range cluster.ServiceState {
if srv.Name == name {
return srv
}
}
return nil
}
func DestroyCluster(ctx context.Context, api API, clusterId string) error {
return api.DestroyKubernetesCluster.Do(ctx, DestroyKubernetesClusterRequest{
ClusterId: clusterId,
}, ResolveEndpoint, nil)
}
func GetCluster(ctx context.Context, api API, clusterId string) (*GetKubernetesClusterResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get").Arg("id", clusterId), func(ctx context.Context) (*GetKubernetesClusterResponse, error) {
var response GetKubernetesClusterResponse
if err := api.GetKubernetesCluster.Do(ctx, GetKubernetesClusterRequest{ClusterId: clusterId}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func EnsureCluster(ctx context.Context, api API, clusterId string) (*GetKubernetesClusterResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.ensure").HumanReadablef("Waiting for environment").Arg("id", clusterId), func(ctx context.Context) (*GetKubernetesClusterResponse, error) {
var response GetKubernetesClusterResponse
if err := api.EnsureKubernetesCluster.Do(ctx, EnsureKubernetesClusterRequest{ClusterId: clusterId}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func GetClusterSummary(ctx context.Context, api API, clusterId string, resources []string) (*GetKubernetesClusterSummaryResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get-summary").LogLevel(1).Arg("id", clusterId), func(ctx context.Context) (*GetKubernetesClusterSummaryResponse, error) {
var response GetKubernetesClusterSummaryResponse
if err := api.GetKubernetesClusterSummary.Do(ctx, GetKubernetesClusterSummaryRequest{ClusterId: clusterId, Resource: resources}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func GetKubernetesConfig(ctx context.Context, api API, clusterId string) (*GetKubernetesConfigResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get").Arg("id", clusterId), func(ctx context.Context) (*GetKubernetesConfigResponse, error) {
var response GetKubernetesConfigResponse
if err := api.GetKubernetesConfig.Do(ctx, GetKubernetesConfigRequest{ClusterId: clusterId}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func GetImageRegistry(ctx context.Context, api API) (*GetImageRegistryResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get-image-registry"), func(ctx context.Context) (*GetImageRegistryResponse, error) {
var response GetImageRegistryResponse
if err := api.GetImageRegistry.Do(ctx, emptypb.Empty{}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
type ListOpts struct {
PreviousRuns bool
NotOlderThan *time.Time
Labels map[string]string
}
func ListClusters(ctx context.Context, api API, opts ListOpts) (*ListKubernetesClustersResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.cluster-list"), func(ctx context.Context) (*ListKubernetesClustersResponse, error) {
req := ListKubernetesClustersRequest{
IncludePreviousRuns: opts.PreviousRuns,
NotOlderThan: opts.NotOlderThan,
}
for key, value := range opts.Labels {
req.LabelFilter = append(req.LabelFilter, &LabelFilterEntry{
Name: key,
Value: value,
Op: "EQUAL",
})
}
var list ListKubernetesClustersResponse
if err := api.ListKubernetesClusters.Do(ctx, req, ResolveEndpoint, fnapi.DecodeJSONResponse(&list)); err != nil {
return nil, err
}
return &list, nil
})
}
type LogsOpts struct {
ClusterID string
StartTs *time.Time
EndTs *time.Time
Include []*LogsSelector
Exclude []*LogsSelector
}
var (
streamResetError = regexp.MustCompile("^stream error:.*; received from peer$")
)
func TailClusterLogs(ctx context.Context, api API, opts *LogsOpts, handle func(LogBlock) error) error {
return api.TailClusterLogs.Do(ctx, TailLogsRequest{
ClusterID: opts.ClusterID,
UseBlockLabels: true,
Include: opts.Include,
Exclude: opts.Exclude,
}, ResolveEndpoint, func(r io.Reader) error {
scanner := bufio.NewScanner(r)
for scanner.Scan() {
var logBlock LogBlock
data := scanner.Bytes()
if err := json.Unmarshal(data, &logBlock); err != nil {
fmt.Fprintf(console.Debug(ctx), "Failed to process a log entry %s: %v\n", string(data), err)
continue
}
if handle != nil {
if err := handle(logBlock); err != nil {
return err
}
}
}
if err := scanner.Err(); err != nil {
// XXX Replace with pagination
if streamResetError.MatchString(err.Error()) {
return fnerrors.New("Logs stream reset. We saw: %w\n\nThis can happen if no new logs arrived for a long time.\nIf you are still expecting new logs, please retry.", err)
}
return fnerrors.New("cluster log stream closed with error: %w", err)
}
return nil
})
}
func GetClusterLogs(ctx context.Context, api API, opts *LogsOpts) (*GetLogsResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get-cluster-logs"), func(ctx context.Context) (*GetLogsResponse, error) {
req := GetLogsRequest{
ClusterID: opts.ClusterID,
UseBlockLabels: true,
StartTs: opts.StartTs,
EndTs: opts.EndTs,
Include: opts.Include,
Exclude: opts.Exclude,
}
var response GetLogsResponse
if err := api.GetClusterLogs.Do(ctx, req, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func GetProfile(ctx context.Context, api API) (*GetProfileResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.get-profile"), func(ctx context.Context) (*GetProfileResponse, error) {
var response GetProfileResponse
if err := api.GetProfile.Do(ctx, emptypb.Empty{}, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
func RegisterIngress(ctx context.Context, api API, req RegisterIngressRequest) (*RegisterIngressResponse, error) {
return tasks.Return(ctx, tasks.Action("nscloud.register-ingress"), func(ctx context.Context) (*RegisterIngressResponse, error) {
var response RegisterIngressResponse
if err := api.RegisterIngress.Do(ctx, req, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
})
}
type clusterCreateProgress struct {
status atomic.String
}
func (crp *clusterCreateProgress) set(status string) { crp.status.Store(status) }
func (crp *clusterCreateProgress) FormatProgress() string { return crp.status.Load() }
func RefreshCluster(ctx context.Context, api API, req RefreshKubernetesClusterRequest) (*RefreshKubernetesClusterResponse, error) {
var response RefreshKubernetesClusterResponse
if err := api.RefreshKubernetesCluster.Do(ctx, req, ResolveEndpoint, fnapi.DecodeJSONResponse(&response)); err != nil {
return nil, err
}
return &response, nil
}
func StartRefreshing(ctx context.Context, api API, clusterId string, handle func(error) error) error {
for {
if _, err := RefreshCluster(ctx, api, RefreshKubernetesClusterRequest{ClusterId: clusterId}); err != nil {
if err := handle(err); err != nil {
return err
}
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(time.Minute):
}
} else {
select {
case <-ctx.Done():
return ctx.Err()
case <-time.After(10 * time.Minute):
}
}
}
}