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nodeimage_controller.go
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nodeimage_controller.go
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/*
Copyright 2021 The Kruise Authors.
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 nodeimage
import (
"context"
"flag"
"fmt"
"math/rand"
"reflect"
"time"
appsv1alpha1 "github.com/openkruise/kruise/apis/apps/v1alpha1"
kruiseclient "github.com/openkruise/kruise/pkg/client"
"github.com/openkruise/kruise/pkg/features"
"github.com/openkruise/kruise/pkg/util"
utildiscovery "github.com/openkruise/kruise/pkg/util/discovery"
utilfeature "github.com/openkruise/kruise/pkg/util/feature"
utilimagejob "github.com/openkruise/kruise/pkg/util/imagejob"
"github.com/openkruise/kruise/pkg/util/requeueduration"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/clock"
"k8s.io/apimachinery/pkg/util/sets"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/tools/reference"
"k8s.io/client-go/util/retry"
"k8s.io/klog/v2"
nodeutil "k8s.io/kubernetes/pkg/controller/util/node"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
func init() {
flag.IntVar(&concurrentReconciles, "nodeimage-workers", concurrentReconciles, "Max concurrent workers for NodeImage controller.")
flag.DurationVar(&nodeImageCreationDelayAfterNodeReady, "nodeimage-creation-delay", nodeImageCreationDelayAfterNodeReady, "Delay duration for NodeImage creation after Node ready.")
}
var (
concurrentReconciles = 3
controllerKind = appsv1alpha1.SchemeGroupVersion.WithKind("NodeImage")
nodeImageCreationDelayAfterNodeReady = time.Second * 30
)
const (
controllerName = "nodeimage-controller"
minRequeueDuration = 3 * time.Second
responseTimeout = time.Minute
// Allow fake NodeImage with no Node related, just for tests
fakeLabelKey = "apps.kruise.io/fake-nodeimage"
)
// Add creates a new NodeImage Controller and adds it to the Manager with default RBAC. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
if !utildiscovery.DiscoverGVK(controllerKind) || !utilfeature.DefaultFeatureGate.Enabled(features.KruiseDaemon) {
return nil
}
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
recorder := mgr.GetEventRecorderFor(controllerName)
if cli := kruiseclient.GetGenericClientWithName(controllerName); cli != nil {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: cli.KubeClient.CoreV1().Events("")})
recorder = eventBroadcaster.NewRecorder(mgr.GetScheme(), v1.EventSource{Component: controllerName})
}
return &ReconcileNodeImage{
Client: util.NewClientFromManager(mgr, controllerName),
scheme: mgr.GetScheme(),
clock: clock.RealClock{},
eventRecorder: recorder,
}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New(controllerName, mgr, controller.Options{Reconciler: r, MaxConcurrentReconciles: concurrentReconciles})
if err != nil {
return err
}
// Watch for changes to NodeImage
err = c.Watch(&source.Kind{Type: &appsv1alpha1.NodeImage{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
// Watch for changes to Node
err = c.Watch(&source.Kind{Type: &v1.Node{}}, &nodeHandler{Reader: mgr.GetCache()})
if err != nil {
return err
}
// Watch for deletion to ImagePullJob
err = c.Watch(&source.Kind{Type: &appsv1alpha1.ImagePullJob{}}, &imagePullJobHandler{Reader: mgr.GetCache()})
if err != nil {
return err
}
return nil
}
var _ reconcile.Reconciler = &ReconcileNodeImage{}
// ReconcileNodeImage reconciles a NodeImage object
type ReconcileNodeImage struct {
client.Client
scheme *runtime.Scheme
clock clock.Clock
eventRecorder record.EventRecorder
}
// +kubebuilder:rbac:groups=core,resources=nodes,verbs=get;list;watch
// +kubebuilder:rbac:groups=apps.kruise.io,resources=nodeimages,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=apps.kruise.io,resources=nodeimages/status,verbs=get;update;patch
// Reconcile reads that state of the cluster for a NodeImage object and makes changes based on the state read
// and what is in the NodeImage.Spec
// Automatically generate RBAC rules to allow the Controller to read and write nodes
func (r *ReconcileNodeImage) Reconcile(_ context.Context, request reconcile.Request) (res reconcile.Result, err error) {
start := time.Now()
klog.V(5).Infof("Starting to process NodeImage %v", request.Name)
var requeueMsg string
defer func() {
if err != nil {
klog.Warningf("Failed to process NodeImage %v err %v, elapsedTime %v", request.Name, time.Since(start), err)
} else if res.RequeueAfter > 0 {
klog.Infof("Finish to process NodeImage %v, elapsedTime %v, RetryAfter %v: %v", request.Name, time.Since(start), res.RequeueAfter, requeueMsg)
} else {
klog.Infof("Finish to process NodeImage %v, elapsedTime %v", request.Name, time.Since(start))
}
}()
// Fetch the Node
node := &v1.Node{}
err = r.Get(context.TODO(), request.NamespacedName, node)
if err != nil {
if !errors.IsNotFound(err) {
return reconcile.Result{}, fmt.Errorf("failed to get node %s: %v", request.NamespacedName.Name, err)
}
node = nil
}
// Fetch the NodeImage
nodeImage := &appsv1alpha1.NodeImage{}
err = r.Get(context.TODO(), request.NamespacedName, nodeImage)
if err != nil {
if !errors.IsNotFound(err) {
return reconcile.Result{}, fmt.Errorf("failed to get nodeimage %s: %v", request.NamespacedName.Name, err)
}
nodeImage = nil
}
// If Node not exists or has been deleted
if node == nil || node.DeletionTimestamp != nil {
// All been deleted
if nodeImage == nil || nodeImage.DeletionTimestamp != nil {
return reconcile.Result{}, nil
}
if _, ok := nodeImage.Labels[fakeLabelKey]; !ok {
// Delete nodeImage
if err = r.Delete(context.TODO(), nodeImage); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to delete nodeimage %v, err: %v", nodeImage.Name, err)
}
return reconcile.Result{}, nil
}
}
// If Node exists, we should create a NodeImage
if nodeImage == nil {
if isReady, delay := getNodeReadyAndDelayTime(node); !isReady {
klog.V(4).Infof("Skip to create NodeImage %s for Node has not ready yet.", request.Name)
return reconcile.Result{}, nil
} else if delay > 0 {
klog.V(4).Infof("Skip to create NodeImage %s for waiting Node ready for %s.", request.Name, delay)
return reconcile.Result{RequeueAfter: delay}, nil
}
nodeImage = &appsv1alpha1.NodeImage{
ObjectMeta: metav1.ObjectMeta{
Name: request.Name,
},
Spec: appsv1alpha1.NodeImageSpec{},
}
if err = r.Create(context.TODO(), nodeImage); err != nil {
return reconcile.Result{}, fmt.Errorf("failed to create nodeimage %v, err: %v", nodeImage.Name, err)
}
klog.Infof("Successfully create nodeimage %s", nodeImage.Name)
return reconcile.Result{}, nil
}
if nodeImage.DeletionTimestamp != nil {
return reconcile.Result{}, nil
}
duration := &requeueduration.Duration{}
if modified, err := r.updateNodeImage(nodeImage.Name, node, duration); err != nil {
return reconcile.Result{}, err
} else if modified {
return reconcile.Result{}, nil
}
if err = r.updateNodeImageStatus(nodeImage, duration); err != nil {
return reconcile.Result{}, err
}
res = reconcile.Result{}
res.RequeueAfter, requeueMsg = duration.GetWithMsg()
if res.RequeueAfter > 0 && res.RequeueAfter < minRequeueDuration {
// 3~5s
res.RequeueAfter = minRequeueDuration + time.Duration(rand.Int31n(2000))*time.Millisecond
}
return res, nil
}
func (r *ReconcileNodeImage) updateNodeImage(name string, node *v1.Node, duration *requeueduration.Duration) (bool, error) {
var modified bool
var messages []string
tmpDuration := &requeueduration.Duration{}
err := retry.RetryOnConflict(retry.DefaultBackoff, func() (err error) {
nodeImage := &appsv1alpha1.NodeImage{}
err = r.Get(context.TODO(), types.NamespacedName{Name: name}, nodeImage)
if err != nil {
return err
}
modified, messages, tmpDuration = r.doUpdateNodeImage(nodeImage, node)
if !modified {
return nil
}
return r.Update(context.TODO(), nodeImage)
})
duration.Merge(tmpDuration)
if err != nil {
klog.Errorf("Failed to update NodeImage %s spec(%v): %v", name, messages, err)
} else if modified {
klog.Infof("Successfully update NodeImage %s spec(%v)", name, messages)
}
return modified, err
}
func (r *ReconcileNodeImage) doUpdateNodeImage(nodeImage *appsv1alpha1.NodeImage, node *v1.Node) (modified bool, messages []string, wait *requeueduration.Duration) {
wait = &requeueduration.Duration{}
if node != nil {
if !reflect.DeepEqual(nodeImage.Labels, node.Labels) {
modified = true
messages = append(messages, "node labels changed")
nodeImage.Labels = node.Labels
}
}
newImageMap := make(map[string]appsv1alpha1.ImageSpec, len(nodeImage.Spec.Images))
for name, imageSpec := range nodeImage.Spec.Images {
var newTags []appsv1alpha1.ImageTagSpec
for i := range imageSpec.Tags {
tagSpec := &imageSpec.Tags[i]
fullName := fmt.Sprintf("%s:%s", name, tagSpec.Tag)
// If createdAt field has not been injected by webhook, delete it
if tagSpec.CreatedAt == nil {
modified = true
messages = append(messages, fmt.Sprintf("image %s has no createAt field", fullName))
continue
}
// If tag has owners which have been deleted, delete this tag
var activeRefs []v1.ObjectReference
for _, ref := range tagSpec.OwnerReferences {
gvk := ref.GroupVersionKind()
if gvk.Group != controllerKind.Group || gvk.Kind != "ImagePullJob" {
activeRefs = append(activeRefs, ref)
continue
}
job := appsv1alpha1.ImagePullJob{}
err := r.Get(context.TODO(), types.NamespacedName{Namespace: ref.Namespace, Name: ref.Name}, &job)
if err != nil {
if errors.IsNotFound(err) {
continue
}
klog.Errorf("Failed to check owners for %s in NodeImage %s, get job %v error: %v", fullName, name, util.DumpJSON(ref), err)
activeRefs = append(activeRefs, ref)
continue
}
if job.UID != ref.UID {
klog.Warningf("When check owners for %s in NodeImage %s, get job %v find UID %v not equal", fullName, name, util.DumpJSON(ref), job.UID)
continue
}
activeRefs = append(activeRefs, ref)
}
if len(activeRefs) != len(tagSpec.OwnerReferences) {
modified = true
messages = append(messages, fmt.Sprintf("image %s owners changed from %v to %v",
fullName, util.DumpJSON(tagSpec.OwnerReferences), util.DumpJSON(activeRefs)))
if len(activeRefs) == 0 {
continue
}
tagSpec.OwnerReferences = activeRefs
}
// If tag has TTL and status has completed, prepare to delete this tag
if tagSpec.PullPolicy != nil && tagSpec.PullPolicy.TTLSecondsAfterFinished != nil {
var completionTime *metav1.Time
if imageStatus, ok := nodeImage.Status.ImageStatuses[name]; ok {
for _, tagStatus := range imageStatus.Tags {
if tagStatus.Tag == tagSpec.Tag && tagStatus.Version == tagSpec.Version {
completionTime = tagStatus.CompletionTime
break
}
}
}
if completionTime != nil {
leftTime := time.Duration(*tagSpec.PullPolicy.TTLSecondsAfterFinished)*time.Second - time.Since(completionTime.Time)
if leftTime <= 0 {
modified = true
messages = append(messages, fmt.Sprintf("image %s has exceeded TTL (%v)s since %v completed", fullName, *tagSpec.PullPolicy.TTLSecondsAfterFinished, completionTime))
continue
}
wait.UpdateWithMsg(leftTime, "[spec]image %s wait TTL (%v)s since %v completed", fullName, *tagSpec.PullPolicy.TTLSecondsAfterFinished, completionTime)
}
}
newTags = append(newTags, *tagSpec)
}
if len(newTags) > 0 {
imageSpec.Tags = newTags
utilimagejob.SortSpecImageTags(&imageSpec)
newImageMap[name] = imageSpec
} else {
modified = true
messages = append(messages, fmt.Sprintf("no longer has %v image spec", name))
}
}
if modified {
nodeImage.Spec.Images = newImageMap
}
return
}
func (r *ReconcileNodeImage) updateNodeImageStatus(nodeImage *appsv1alpha1.NodeImage, duration *requeueduration.Duration) error {
now := metav1.NewTime(r.clock.Now())
specFullImages := sets.NewString()
newStatus := nodeImage.Status.DeepCopy()
for name, imageSpec := range nodeImage.Spec.Images {
imageStatus := newStatus.ImageStatuses[name]
for i := range imageSpec.Tags {
tagSpec := &imageSpec.Tags[i]
fullName := fmt.Sprintf("%s:%s", name, tagSpec.Tag)
specFullImages.Insert(fullName)
if tagSpec.CreatedAt == nil {
continue
}
var tagStatus *appsv1alpha1.ImageTagStatus
for i := range imageStatus.Tags {
if imageStatus.Tags[i].Tag == tagSpec.Tag {
tagStatus = &imageStatus.Tags[i]
break
}
}
var failed bool
// image-puller not responded for a 1min
if tagStatus == nil || tagStatus.Version != tagSpec.Version {
if leftTime := responseTimeout - time.Since(tagSpec.CreatedAt.Time); leftTime > 0 {
duration.UpdateWithMsg(leftTime, "[status]image %s wait response timeout (60)s since %v created", fullName, tagSpec.CreatedAt)
continue
}
if tagStatus == nil {
tagStatus = &appsv1alpha1.ImageTagStatus{
Tag: tagSpec.Tag,
Phase: appsv1alpha1.ImagePhaseFailed,
CompletionTime: &now,
Version: tagSpec.Version,
Message: "node has not responded for a long time",
}
imageStatus.Tags = append(imageStatus.Tags, *tagStatus)
} else {
tagStatus.Phase = appsv1alpha1.ImagePhaseFailed
tagStatus.CompletionTime = &now
tagStatus.Version = tagSpec.Version
tagStatus.Message = "node has not responded for a long time"
}
failed = true
}
// activeDeadlineSeconds timeout
if tagStatus.CompletionTime == nil && tagSpec.PullPolicy.ActiveDeadlineSeconds != nil {
if leftTime := time.Duration(*tagSpec.PullPolicy.ActiveDeadlineSeconds)*time.Second + responseTimeout - time.Since(tagSpec.CreatedAt.Time); leftTime > 0 {
duration.UpdateWithMsg(leftTime, "[status]image %s wait deadline (%v)s since %v created", fullName, *tagSpec.PullPolicy.ActiveDeadlineSeconds, tagSpec.CreatedAt)
continue
}
tagStatus.Phase = appsv1alpha1.ImagePhaseFailed
tagStatus.CompletionTime = &now
tagStatus.Version = tagSpec.Version
tagStatus.Message = "pulling exceeds the activeDeadlineSeconds"
failed = true
}
// It means this tag has been failed
if failed {
if r.eventRecorder != nil {
for _, owner := range tagSpec.OwnerReferences {
r.eventRecorder.Eventf(&owner, v1.EventTypeWarning, "PullImageFailed", "Failed to pull image %v on node %v for %v", fullName, nodeImage.Name, tagStatus.Message)
}
if ref, _ := reference.GetReference(r.scheme, nodeImage); ref != nil {
r.eventRecorder.Eventf(ref, v1.EventTypeWarning, "PullImageFailed", "Failed to pull image %v on node %v for %v", fullName, nodeImage.Name, tagStatus.Message)
}
}
}
}
if len(imageStatus.Tags) > 0 {
if newStatus.ImageStatuses == nil {
newStatus.ImageStatuses = make(map[string]appsv1alpha1.ImageStatus)
}
utilimagejob.SortStatusImageTags(&imageStatus)
newStatus.ImageStatuses[name] = imageStatus
}
}
if util.IsJSONObjectEqual(newStatus.ImageStatuses, nodeImage.Status.ImageStatuses) {
return nil
}
succeeded, failed, pulling := 0, 0, 0
newImagesStatus := make(map[string]appsv1alpha1.ImageStatus, len(nodeImage.Spec.Images))
for name, imageStatus := range newStatus.ImageStatuses {
if _, ok := nodeImage.Spec.Images[name]; !ok {
continue
}
newTags := make([]appsv1alpha1.ImageTagStatus, 0, len(imageStatus.Tags))
for _, tagStatus := range imageStatus.Tags {
fullName := fmt.Sprintf("%s:%s", name, tagStatus.Tag)
if !specFullImages.Has(fullName) {
continue
}
newTags = append(newTags, tagStatus)
switch tagStatus.Phase {
case appsv1alpha1.ImagePhaseSucceeded:
succeeded++
case appsv1alpha1.ImagePhasePulling:
pulling++
case appsv1alpha1.ImagePhaseFailed:
failed++
}
}
if len(newTags) > 0 {
imageStatus.Tags = newTags
newImagesStatus[name] = imageStatus
}
}
newStatus.ImageStatuses = newImagesStatus
newStatus.Desired = int32(specFullImages.Len())
newStatus.Pulling = int32(pulling)
newStatus.Succeeded = int32(succeeded)
newStatus.Failed = int32(failed)
klog.V(3).Infof("Preparing to update status for NodeImage %s, old: %v, new: %v", nodeImage.Name, util.DumpJSON(nodeImage.Status), util.DumpJSON(newStatus))
nodeImage.Status = *newStatus
err := r.Status().Update(context.TODO(), nodeImage)
if err != nil && !errors.IsConflict(err) {
klog.Errorf("Failed to update status for NodeImage %v: %v", nodeImage.Name, err)
}
return err
}
func getNodeReadyAndDelayTime(node *v1.Node) (bool, time.Duration) {
_, condition := nodeutil.GetNodeCondition(&node.Status, v1.NodeReady)
if condition == nil || condition.Status != v1.ConditionTrue {
return false, 0
}
delay := nodeImageCreationDelayAfterNodeReady - time.Since(condition.LastTransitionTime.Time)
if delay > 0 {
return true, delay
}
return true, 0
}