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update_node_group_status.go
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update_node_group_status.go
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/*
Copyright 2021 Flant JSC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package hooks
import (
"encoding/json"
"fmt"
"sort"
"strings"
"time"
"github.com/Masterminds/semver/v3"
"github.com/flant/addon-operator/pkg/module_manager/go_hook"
"github.com/flant/addon-operator/sdk"
"github.com/flant/shell-operator/pkg/kube/object_patch"
"github.com/flant/shell-operator/pkg/kube_events_manager/types"
corev1 "k8s.io/api/core/v1"
eventsv1 "k8s.io/api/events/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
apimtypes "k8s.io/apimachinery/pkg/types"
"k8s.io/utils/pointer"
"github.com/deckhouse/deckhouse/modules/040-node-manager/hooks/internal/mcm/v1alpha1"
"github.com/deckhouse/deckhouse/modules/040-node-manager/hooks/internal/shared"
ngv1 "github.com/deckhouse/deckhouse/modules/040-node-manager/hooks/internal/v1"
)
var (
// cache for event messages to avoid event spamming
// it's much harder to increment counter for existing event
ngStatusCache = make(map[string]string)
)
var _ = sdk.RegisterFunc(&go_hook.HookConfig{
Settings: &go_hook.HookConfigSettings{
ExecutionMinInterval: 5 * time.Second,
ExecutionBurst: 3,
},
OnAfterHelm: &go_hook.OrderedConfig{Order: 10},
Queue: "/modules/node-manager/update_ngs_statuses",
Kubernetes: []go_hook.KubernetesConfig{
// snapshot: "configuration_checksums_secret"
// api: "v1",
// kind: "Secret",
// ns: "d8-cloud-instance-manager"
// name: "configuration-checksums"
shared.ConfigurationChecksumHookConfig(),
{
Name: "ngs",
Kind: "NodeGroup",
ApiVersion: "deckhouse.io/v1",
WaitForSynchronization: pointer.BoolPtr(false),
FilterFunc: updStatusFilterNodeGroup,
},
{
Name: "zones_count",
WaitForSynchronization: pointer.BoolPtr(false),
ApiVersion: "v1",
Kind: "Secret",
NamespaceSelector: &types.NamespaceSelector{
NameSelector: &types.NameSelector{
MatchNames: []string{"kube-system"},
},
},
NameSelector: &types.NameSelector{
MatchNames: []string{"d8-node-manager-cloud-provider"},
},
FilterFunc: updStatusFilterCpSecrets,
},
{
Name: "mds",
WaitForSynchronization: pointer.BoolPtr(false),
ApiVersion: "machine.sapcloud.io/v1alpha1",
Kind: "MachineDeployment",
NamespaceSelector: &types.NamespaceSelector{
NameSelector: &types.NameSelector{
MatchNames: []string{"d8-cloud-instance-manager"},
},
},
FilterFunc: updStatusFilterMD,
},
{
Name: "instances",
WaitForSynchronization: pointer.BoolPtr(false),
ApiVersion: "machine.sapcloud.io/v1alpha1",
Kind: "Machine",
NamespaceSelector: &types.NamespaceSelector{
NameSelector: &types.NameSelector{
MatchNames: []string{"d8-cloud-instance-manager"},
},
},
FilterFunc: updStatusFilterMachine,
},
{
Name: "nodes",
WaitForSynchronization: pointer.BoolPtr(false),
ApiVersion: "v1",
Kind: "Node",
LabelSelector: &v1.LabelSelector{
MatchExpressions: []v1.LabelSelectorRequirement{
{
Key: "node.deckhouse.io/group",
Operator: v1.LabelSelectorOpExists,
},
},
},
FilterFunc: updStatusFilterNode,
},
},
}, handleUpdateNGStatus)
func updStatusFilterMD(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var md v1alpha1.MachineDeployment
err := sdk.FromUnstructured(obj, &md)
if err != nil {
return nil, err
}
return statusMachineDeployment{
Name: md.Name,
Replicas: md.Spec.Replicas,
NodeGroup: md.Labels["node-group"],
LastMachineFailures: md.Status.FailedMachines,
}, nil
}
func updStatusFilterNode(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var node corev1.Node
err := sdk.FromUnstructured(obj, &node)
if err != nil {
return nil, err
}
cloudInstanceGroup := node.Labels["node.deckhouse.io/group"]
configurationChecksum := node.Annotations["node.deckhouse.io/configuration-checksum"]
var isReady bool
for _, cond := range node.Status.Conditions {
if cond.Type == corev1.NodeReady && cond.Status == corev1.ConditionTrue {
isReady = true
break
}
}
return statusNode{
Name: node.Name,
CloudInstanceGroup: cloudInstanceGroup,
IsReady: isReady,
Checksum: configurationChecksum,
}, nil
}
func updStatusFilterNodeGroup(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var ng ngv1.NodeGroup
err := sdk.FromUnstructured(obj, &ng)
if err != nil {
return nil, err
}
var minPerZone, maxPerZone int32
if ng.Spec.CloudInstances.MinPerZone != nil {
minPerZone = *ng.Spec.CloudInstances.MinPerZone
}
if ng.Spec.CloudInstances.MaxPerZone != nil {
maxPerZone = *ng.Spec.CloudInstances.MaxPerZone
}
zonesNum := len(ng.Spec.CloudInstances.Zones)
return statusNodeGroup{
Name: ng.Name,
NodeType: ng.Spec.NodeType,
MinPerZone: minPerZone,
MaxPerZone: maxPerZone,
ZonesNum: int32(zonesNum),
Error: ng.Status.Error,
UID: ng.UID,
ResourceVersion: ng.ResourceVersion,
}, nil
}
func updStatusFilterMachine(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var machine v1alpha1.Machine
err := sdk.FromUnstructured(obj, &machine)
if err != nil {
return nil, err
}
nodeGroup := machine.Spec.NodeTemplateSpec.Labels["node.deckhouse.io/group"]
return nodeGroup, nil
}
// returns count of zones for current cluster
func updStatusFilterCpSecrets(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var sec corev1.Secret
err := sdk.FromUnstructured(obj, &sec)
if err != nil {
return nil, err
}
var res []string
zonesDataBytes := sec.Data["zones"]
err = json.Unmarshal(zonesDataBytes, &res)
if err != nil {
return nil, err
}
return int32(len(res)), nil
}
func handleUpdateNGStatus(input *go_hook.HookInput) error {
var defaultZonesNum int32
snap := input.Snapshots["zones_count"]
if len(snap) > 0 {
defaultZonesNum = snap[0].(int32)
}
// machine deployments snapshot
snap = input.Snapshots["mds"]
mdMap := make(map[string][]statusMachineDeployment)
for _, res := range snap {
md := res.(statusMachineDeployment)
// group by nodeGroup
if v, ok := mdMap[md.NodeGroup]; ok {
v = append(v, md)
mdMap[md.NodeGroup] = v
} else {
mdMap[md.NodeGroup] = []statusMachineDeployment{md}
}
// set metric for MachineDeployment
labels := map[string]string{
"node_group": md.NodeGroup,
"name": md.Name,
}
input.MetricsCollector.Set("machine_deployment_node_group_info", 1, labels)
}
// count instances of each node group
instances := make(map[string]int32)
snap = input.Snapshots["instances"]
for _, res := range snap {
instanceNodeGroup := res.(string)
if count, ok := instances[instanceNodeGroup]; ok {
count++
instances[instanceNodeGroup] = count
} else {
instances[instanceNodeGroup] = 1
}
}
// store configuration checksums for each node group
checksums := make(map[string]string)
snap = input.Snapshots["configuration_checksums_secret"]
if len(snap) > 0 {
for k, v := range snap[0].(shared.ConfigurationChecksum) {
checksums[k] = v
}
}
snap = input.Snapshots["nodes"]
nodes := make([]statusNode, 0, len(snap))
for _, sn := range snap {
node := sn.(statusNode)
nodes = append(nodes, node)
}
// iterate over all node groups and calculate desired and current status
snap = input.Snapshots["ngs"]
for _, res := range snap {
nodeGroup := res.(statusNodeGroup)
ngName := nodeGroup.Name
// calculate nodes and their status
var nodesNum, readyNodesNum, uptodateNodesCount int32
for _, node := range nodes {
if node.CloudInstanceGroup == ngName {
nodesNum++
if node.IsReady {
readyNodesNum++
}
}
ngChecksum := checksums[ngName]
if node.Checksum == ngChecksum {
uptodateNodesCount++
}
}
// calculate zonecount
zonesCount := nodeGroup.ZonesNum
if zonesCount == 0 {
zonesCount = defaultZonesNum
}
minPerZone := nodeGroup.MinPerZone * zonesCount
maxPerZone := nodeGroup.MaxPerZone * zonesCount
var desiredMax int32
var lastMachineFailures []*v1alpha1.MachineSummary
mds := mdMap[ngName]
for _, md := range mds {
desiredMax += md.Replicas
lastMachineFailures = append(lastMachineFailures, md.LastMachineFailures...)
}
if minPerZone > desiredMax {
desiredMax = minPerZone
}
var failureReason string
if len(lastMachineFailures) > 0 {
sort.Slice(lastMachineFailures, func(i, j int) bool {
imts := lastMachineFailures[i].LastOperation.LastUpdateTime
jmts := lastMachineFailures[j].LastOperation.LastUpdateTime
return imts.Before(&jmts)
})
failureReason = lastMachineFailures[len(lastMachineFailures)-1].LastOperation.Description
}
statusMsg := fmt.Sprintf("%s %s", nodeGroup.Error, failureReason)
statusMsg = strings.TrimSpace(statusMsg)
if len(statusMsg) > 0 {
// truncate to maximum allowed message limit
// https://github.com/kubernetes/kubernetes/blob/3e442b74f717ab2f43897d7af50de6114486e459/pkg/apis/core/validation/events.go#L38
if len(statusMsg) > 1024 {
statusMsg = statusMsg[:1024]
}
prev := ngStatusCache[nodeGroup.Name]
// skip events with the same in-row message
if prev != statusMsg {
err := createEvent(input, nodeGroup, statusMsg)
if err != nil {
return err
}
ngStatusCache[nodeGroup.Name] = statusMsg
}
// rewrite status message for NG description field
statusMsg = "Machine creation failed. Check events for details."
}
instancesCount := instances[ngName]
patch := buildUpdateStatusPatch(
nodesNum, readyNodesNum, uptodateNodesCount,
minPerZone, maxPerZone,
desiredMax, instancesCount,
nodeGroup.NodeType, statusMsg,
lastMachineFailures,
)
input.PatchCollector.MergePatch(patch, "deckhouse.io/v1", "NodeGroup", "", ngName, object_patch.WithSubresource("/status"))
}
return nil
}
func createEvent(input *go_hook.HookInput, nodeGroup statusNodeGroup, msg string) error {
eventType := corev1.EventTypeWarning
reason := "MachineFailed"
if msg == "Started Machine creation process" {
eventType = corev1.EventTypeNormal
reason = "MachineCreating"
}
now := time.Now()
minK8sVersionStr := input.Values.Get("global.discovery.kubernetesVersion").String()
minK8sVersion, err := semver.NewVersion(minK8sVersionStr)
if err != nil {
return fmt.Errorf("failed to parse minimal k8s version: %s", err)
}
// only from 1.20 k8s events.k8s.io API became public
v120 := semver.MustParse("1.20.0")
var event interface{}
if minK8sVersion.LessThan(v120) {
event = buildDeprecatedEvent(nodeGroup, eventType, reason, msg, now)
} else {
event = buildEventV1(nodeGroup, eventType, reason, msg, now)
}
input.PatchCollector.Create(event)
return nil
}
func buildDeprecatedEvent(nodeGroup statusNodeGroup, eventType, reason, msg string, now time.Time) *corev1.Event {
return &corev1.Event{
TypeMeta: v1.TypeMeta{
APIVersion: "v1",
Kind: "Event",
},
ObjectMeta: v1.ObjectMeta{
Namespace: "default",
GenerateName: "ng-" + nodeGroup.Name + "-",
},
InvolvedObject: corev1.ObjectReference{
APIVersion: "deckhouse.io/v1",
Kind: "NodeGroup",
Name: nodeGroup.Name,
UID: nodeGroup.UID,
ResourceVersion: nodeGroup.ResourceVersion,
},
Reason: reason,
Message: msg,
Source: corev1.EventSource{
Component: "deckhouse",
},
// Don't use EventTime, it's for event series
FirstTimestamp: v1.Time{Time: now},
Count: 1,
Type: eventType,
ReportingController: "deckhouse",
ReportingInstance: "deckhouse",
Action: "Binding",
}
}
func buildEventV1(nodeGroup statusNodeGroup, eventType, reason, msg string, now time.Time) *eventsv1.Event {
return &eventsv1.Event{
TypeMeta: v1.TypeMeta{
Kind: "Event",
APIVersion: "events.k8s.io/v1",
},
ObjectMeta: v1.ObjectMeta{
// Namespace field has to be filled - event will not be created without it
// and we have to set 'default' value here for linking this event with a NodeGroup object, which is global
// if we set 'd8-cloud-instance-manager' here for example, `Events` field on `kubectl describe ng $X` will be empty
Namespace: "default",
GenerateName: "ng-" + nodeGroup.Name + "-",
},
Regarding: corev1.ObjectReference{
Kind: "NodeGroup",
Name: nodeGroup.Name,
UID: nodeGroup.UID,
APIVersion: "deckhouse.io/v1",
ResourceVersion: nodeGroup.ResourceVersion,
},
Reason: reason,
Note: msg,
Type: eventType,
EventTime: v1.MicroTime{Time: now},
Action: "Binding",
ReportingInstance: "deckhouse",
ReportingController: "deckhouse",
}
}
func buildUpdateStatusPatch(
nodesNum, readyNodesNum, uptodateNodesCount,
minPerZone, maxPerZone,
desiredMax, instancesNum int32,
nodeType ngv1.NodeType, statusMsg string,
lastMachineFailures []*v1alpha1.MachineSummary,
) interface{} {
ready := "True"
if len(statusMsg) > 0 {
ready = "False"
}
patch := map[string]interface{}{
"nodes": nodesNum,
"ready": readyNodesNum,
"upToDate": uptodateNodesCount,
}
if nodeType == ngv1.NodeTypeCloudEphemeral {
patch["min"] = minPerZone
patch["max"] = maxPerZone
patch["desired"] = desiredMax
patch["instances"] = instancesNum
patch["lastMachineFailures"] = lastMachineFailures
if len(lastMachineFailures) == 0 {
patch["lastMachineFailures"] = make([]interface{}, 0) // to make [] array in json result
}
}
patch["conditionSummary"] = map[string]interface{}{
"ready": ready,
"statusMessage": statusMsg,
}
statusPatch := map[string]interface{}{
"status": patch,
}
return statusPatch
}
type statusNodeGroup struct {
Name string
NodeType ngv1.NodeType
MinPerZone int32
MaxPerZone int32
ZonesNum int32
Error string
// for event generation
UID apimtypes.UID
ResourceVersion string
}
type statusNode struct {
Name string
CloudInstanceGroup string
IsReady bool
Checksum string
}
type statusMachineDeployment struct {
Name string
Replicas int32
NodeGroup string
LastMachineFailures []*v1alpha1.MachineSummary
}