/
controller.go
701 lines (644 loc) · 24.6 KB
/
controller.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. 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. You may obtain a copy of the
* License at
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package tappcontroller
import (
"context"
normalerrors "errors"
"fmt"
"reflect"
"sync"
"time"
"tkestack.io/tke/pkg/platform/controller/addon/tappcontroller/images"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
clientset "tkestack.io/tke/api/client/clientset/versioned"
platformv1informer "tkestack.io/tke/api/client/informers/externalversions/platform/v1"
platformv1lister "tkestack.io/tke/api/client/listers/platform/v1"
v1 "tkestack.io/tke/api/platform/v1"
controllerutil "tkestack.io/tke/pkg/controller"
"tkestack.io/tke/pkg/platform/util"
"tkestack.io/tke/pkg/util/log"
"tkestack.io/tke/pkg/util/metrics"
)
const (
clientRetryCount = 5
clientRetryInterval = 5 * time.Second
maxRetryCount = 5
timeOut = 5 * time.Minute
)
const (
controllerName = "tapp-controller"
deployTappControllerName = "tapp-controller"
svcTappControllerName = "tapp-controller"
svcAccountTappControllerName = "tapp-controller"
crbTappControllerName = "tapp-controller"
)
// Controller is responsible for performing actions dependent upon a tapp controller phase.
type Controller struct {
client clientset.Interface
cache *tappControllerCache
health sync.Map
checking sync.Map
upgrading sync.Map
queue workqueue.RateLimitingInterface
lister platformv1lister.TappControllerLister
listerSynced cache.InformerSynced
stopCh <-chan struct{}
}
// NewController creates a new Controller object.
func NewController(client clientset.Interface, informer platformv1informer.TappControllerInformer, resyncPeriod time.Duration) *Controller {
// create the controller so we can inject the enqueue function
controller := &Controller{
client: client,
cache: &tappControllerCache{tappControllerMap: make(map[string]*cachedTappController)},
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), controllerName),
}
if client != nil && client.PlatformV1().RESTClient().GetRateLimiter() != nil {
_ = metrics.RegisterMetricAndTrackRateLimiterUsage(controllerName, client.PlatformV1().RESTClient().GetRateLimiter())
}
// configure the tapp controller informer event handlers
informer.Informer().AddEventHandlerWithResyncPeriod(
cache.ResourceEventHandlerFuncs{
AddFunc: controller.enqueueTappController,
UpdateFunc: func(oldObj, newObj interface{}) {
oldTappController, ok1 := oldObj.(*v1.TappController)
curTappController, ok2 := newObj.(*v1.TappController)
if ok1 && ok2 && controller.needsUpdate(oldTappController, curTappController) {
controller.enqueueTappController(newObj)
}
},
DeleteFunc: controller.enqueueTappController,
},
resyncPeriod,
)
controller.lister = informer.Lister()
controller.listerSynced = informer.Informer().HasSynced
return controller
}
// obj could be an *v1.TappController, or a DeletionFinalStateUnknown marker item.
func (c *Controller) enqueueTappController(obj interface{}) {
key, err := controllerutil.KeyFunc(obj)
if err != nil {
log.Error("Couldn't get key for object", log.Any("object", obj), log.Err(err))
return
}
c.queue.Add(key)
}
func (c *Controller) needsUpdate(old *v1.TappController, new *v1.TappController) bool {
return !reflect.DeepEqual(old, new)
}
// Run will set up the event handlers for types we are interested in, as well
// as syncing informer caches and starting workers.
func (c *Controller) Run(workers int, stopCh <-chan struct{}) error {
defer runtime.HandleCrash()
defer c.queue.ShutDown()
// Start the informer factories to begin populating the informer caches
log.Info("Starting tappcontroller controller")
defer log.Info("Shutting down tappcontroller controller")
if ok := cache.WaitForCacheSync(stopCh, c.listerSynced); !ok {
return fmt.Errorf("failed to wait for cluster caches to sync")
}
c.stopCh = stopCh
for i := 0; i < workers; i++ {
go wait.Until(c.worker, time.Second, stopCh)
}
<-stopCh
return nil
}
// worker processes the queue of namespace objects.
// Each namespace can be in the queue at most once.
// The system ensures that no two workers can process
// the same namespace at the same time.
func (c *Controller) worker() {
for c.processNextWorkItem() {
}
}
func (c *Controller) processNextWorkItem() bool {
key, quit := c.queue.Get()
if quit {
return false
}
defer c.queue.Done(key)
err := c.syncTappController(key.(string))
if err == nil {
c.queue.Forget(key)
return true
}
runtime.HandleError(fmt.Errorf("error processing tapp controller %v (will retry): %v", key, err))
c.queue.AddRateLimited(key)
return true
}
// syncTappController will sync the tapp controller with the given key if it has had
// its expectations fulfilled, meaning it did not expect to see any more of its
// namespaces created or deleted. This function is not meant to be invoked
// concurrently with the same key.
func (c *Controller) syncTappController(key string) error {
startTime := time.Now()
defer func() {
log.Info("Finished syncing tappController", log.String("tappControllerName", key), log.Duration("processTime", time.Since(startTime)))
}()
_, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
return err
}
// tappController holds the latest tappController info from apiserver
tappController, err := c.lister.Get(name)
switch {
case errors.IsNotFound(err):
log.Info("Tapp controller has been deleted. Attempting to cleanup resources", log.String("tappControllerName", key))
err = c.processTappControllerDeletion(context.Background(), key)
case err != nil:
log.Warn("Unable to retrieve tapp controller from store", log.String("tappControllerName", key), log.Err(err))
default:
cachedTappController := c.cache.getOrCreate(key)
err = c.processTappControllerUpdate(context.Background(), cachedTappController, tappController, key)
}
return err
}
func (c *Controller) processTappControllerDeletion(ctx context.Context, key string) error {
cachedTappController, ok := c.cache.get(key)
if !ok {
log.Error("Tapp controller not in cache even though the watcher thought it was. Ignoring the deletion", log.String("tappControllerName", key))
return nil
}
return c.processTappControllerDelete(ctx, cachedTappController, key)
}
func (c *Controller) processTappControllerDelete(ctx context.Context, cachedTappController *cachedTappController, key string) error {
log.Info("Tapp controller will be dropped", log.String("tappControllerName", key))
if c.cache.Exist(key) {
log.Info("Delete the tapp controller cache", log.String("tappControllerName", key))
c.cache.delete(key)
}
if _, ok := c.health.Load(key); ok {
log.Info("Delete the tapp controller health cache", log.String("tappControllerName", key))
c.health.Delete(key)
}
tappController := cachedTappController.state
return c.uninstallTappController(ctx, tappController)
}
func (c *Controller) processTappControllerUpdate(ctx context.Context, cachedTappController *cachedTappController, tappController *v1.TappController, key string) error {
if cachedTappController.state != nil {
// exist and the cluster name changed
if cachedTappController.state.UID != tappController.UID {
if err := c.processTappControllerDelete(ctx, cachedTappController, key); err != nil {
return err
}
}
}
err := c.createTappControllerIfNeeded(ctx, key, cachedTappController, tappController)
if err != nil {
return err
}
cachedTappController.state = tappController
// Always update the cache upon success.
c.cache.set(key, cachedTappController)
return nil
}
func (c *Controller) tappControllerReinitialize(ctx context.Context, key string, cachedTappController *cachedTappController, tappController *v1.TappController) func() (bool, error) {
// this func will always return true that keeps the poll once
return func() (bool, error) {
err := c.installTappController(ctx, tappController)
if err == nil {
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseChecking
tappController.Status.Reason = ""
tappController.Status.LastReInitializingTimestamp = metav1.NewTime(time.Now())
err = c.persistUpdate(ctx, tappController)
if err != nil {
return true, err
}
return true, nil
}
// First, rollback the tappController
if err := c.uninstallTappController(ctx, tappController); err != nil {
log.Error("Uninstall tapp controller error.")
return true, err
}
if tappController.Status.RetryCount == maxRetryCount {
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseFailed
tappController.Status.Reason = fmt.Sprintf("Install error and retried max(%d) times already.", maxRetryCount)
err := c.persistUpdate(ctx, tappController)
if err != nil {
log.Error("Update tapp controller error.")
return true, err
}
return true, nil
}
// Add the retry count will trigger reinitialize function from the persistent controller again.
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseReinitializing
tappController.Status.Reason = err.Error()
tappController.Status.LastReInitializingTimestamp = metav1.NewTime(time.Now())
tappController.Status.RetryCount++
err = c.persistUpdate(ctx, tappController)
if err != nil {
return true, err
}
return true, nil
}
}
func (c *Controller) createTappControllerIfNeeded(ctx context.Context, key string, cachedTappController *cachedTappController, tappController *v1.TappController) error {
switch tappController.Status.Phase {
case v1.AddonPhaseInitializing:
log.Error("Tapp controller will be created", log.String("tappControllerName", key))
err := c.installTappController(ctx, tappController)
if err == nil {
tappController = tappController.DeepCopy()
tappController.Status.Version = tappController.Spec.Version
tappController.Status.Phase = v1.AddonPhaseChecking
tappController.Status.Reason = ""
tappController.Status.RetryCount = 0
return c.persistUpdate(ctx, tappController)
}
tappController = tappController.DeepCopy()
tappController.Status.Version = tappController.Spec.Version
tappController.Status.Phase = v1.AddonPhaseReinitializing
tappController.Status.Reason = err.Error()
tappController.Status.RetryCount = 1
tappController.Status.LastReInitializingTimestamp = metav1.Now()
return c.persistUpdate(ctx, tappController)
case v1.AddonPhaseReinitializing:
var interval = time.Since(tappController.Status.LastReInitializingTimestamp.Time)
var waitTime time.Duration
if interval >= timeOut {
waitTime = time.Duration(1)
} else {
waitTime = timeOut - interval
}
go wait.Poll(waitTime, timeOut, c.tappControllerReinitialize(ctx, key, cachedTappController, tappController))
case v1.AddonPhaseChecking:
if _, ok := c.checking.Load(key); !ok {
c.checking.Store(key, true)
initDelay := time.Now().Add(5 * time.Minute)
go func() {
defer c.checking.Delete(key)
wait.PollImmediate(5*time.Second, 5*time.Minute, c.checkTappControllerStatus(ctx, tappController, key, initDelay))
}()
}
case v1.AddonPhaseRunning:
if needUpgrade(tappController) {
c.health.Delete(key)
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseUpgrading
tappController.Status.Reason = ""
tappController.Status.RetryCount = 0
return c.persistUpdate(ctx, tappController)
}
c.checkHealth(ctx, key)
case v1.AddonPhaseUpgrading:
if _, ok := c.upgrading.Load(key); !ok {
c.upgrading.Store(key, true)
upgradeDelay := time.Now().Add(timeOut)
go func() {
defer c.upgrading.Delete(key)
wait.PollImmediate(5*time.Second, timeOut, c.upgradeTappController(ctx, tappController, key, upgradeDelay))
}()
}
case v1.AddonPhaseFailed:
log.Info("Tapp controller is error", log.String("tappControllerName", key))
c.checkHealth(ctx, key)
}
return nil
}
func (c *Controller) checkHealth(ctx context.Context, key string) {
if _, ok := c.health.Load(key); !ok {
c.health.Store(key, true)
go func() {
defer c.health.Delete(key)
wait.PollImmediateUntil(5*time.Minute, c.watchTappControllerHealth(ctx, key), c.stopCh)
}()
}
}
func needUpgrade(tappController *v1.TappController) bool {
return tappController.Spec.Version != tappController.Status.Version
}
func (c *Controller) installTappController(ctx context.Context, tappController *v1.TappController) error {
cluster, err := c.client.PlatformV1().Clusters().Get(ctx, tappController.Spec.ClusterName, metav1.GetOptions{})
if err != nil {
return err
}
kubeClient, err := util.BuildExternalClientSet(ctx, cluster, c.client.PlatformV1())
if err != nil {
return err
}
// ServiceAccount TappController
if _, err := kubeClient.CoreV1().ServiceAccounts(metav1.NamespaceSystem).Create(ctx, serviceAccountTappController(), metav1.CreateOptions{}); err != nil {
return err
}
// ClusterRoleBinding TappController
if _, err := kubeClient.RbacV1().ClusterRoleBindings().Create(ctx, crbTappController(), metav1.CreateOptions{}); err != nil {
return err
}
// Deployment TappController
if _, err := kubeClient.AppsV1().Deployments(metav1.NamespaceSystem).Create(ctx, deploymentTappController(images.Get(tappController.Spec.Version)), metav1.CreateOptions{}); err != nil {
return err
}
// Service TappController
if _, err := kubeClient.CoreV1().Services(metav1.NamespaceSystem).Create(ctx, serviceTappController(), metav1.CreateOptions{}); err != nil {
return err
}
return nil
}
func serviceAccountTappController() *corev1.ServiceAccount {
return &corev1.ServiceAccount{
TypeMeta: metav1.TypeMeta{
Kind: "ServiceAccount",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: svcAccountTappControllerName,
Namespace: metav1.NamespaceSystem,
},
}
}
func crbTappController() *rbacv1.ClusterRoleBinding {
return &rbacv1.ClusterRoleBinding{
TypeMeta: metav1.TypeMeta{
Kind: "ClusterRoleBinding",
APIVersion: "rbac.authorization.k8s.io/v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: crbTappControllerName,
},
RoleRef: rbacv1.RoleRef{
APIGroup: "rbac.authorization.k8s.io",
Kind: "ClusterRole",
Name: "cluster-admin",
},
Subjects: []rbacv1.Subject{
{
Kind: "ServiceAccount",
Name: svcAccountTappControllerName,
Namespace: metav1.NamespaceSystem,
},
},
}
}
func deploymentTappController(components images.Components) *appsv1.Deployment {
return &appsv1.Deployment{
TypeMeta: metav1.TypeMeta{
Kind: "Deployment",
APIVersion: "apps/v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: deployTappControllerName,
Labels: map[string]string{"app": controllerName},
Namespace: metav1.NamespaceSystem,
},
Spec: appsv1.DeploymentSpec{
Replicas: int32Ptr(1),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{"app": controllerName},
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{"app": controllerName},
},
Spec: corev1.PodSpec{
PriorityClassName: "system-cluster-critical",
ServiceAccountName: svcAccountTappControllerName,
Containers: []corev1.Container{
{
Name: controllerName,
Image: components.TappController.FullName(),
Args: []string{"--v", "3", "--register-admission", "true"},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
// TODO: add support for configuring them
corev1.ResourceCPU: *resource.NewQuantity(1, resource.DecimalSI),
corev1.ResourceMemory: *resource.NewQuantity(512*1024*1024, resource.BinarySI),
},
},
},
},
},
},
},
}
}
func serviceTappController() *corev1.Service {
return &corev1.Service{
TypeMeta: metav1.TypeMeta{
Kind: "Service",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: svcTappControllerName,
Labels: map[string]string{"app": controllerName},
Namespace: metav1.NamespaceSystem,
},
Spec: corev1.ServiceSpec{
Ports: []corev1.ServicePort{
{Name: "https", Port: 443, TargetPort: intstr.FromInt(8443)},
},
Selector: map[string]string{"app": controllerName},
Type: corev1.ServiceTypeClusterIP,
},
}
}
func int32Ptr(i int32) *int32 { return &i }
func (c *Controller) uninstallTappController(ctx context.Context, tappController *v1.TappController) error {
cluster, err := c.client.PlatformV1().Clusters().Get(ctx, tappController.Spec.ClusterName, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
return nil
}
if err != nil {
return err
}
if cluster.Status.Phase == v1.ClusterTerminating {
log.Info(fmt.Sprintf("Keep the components of TappController %s when deleting the cluster", tappController.Name))
return nil
}
kubeClient, err := util.BuildExternalClientSet(ctx, cluster, c.client.PlatformV1())
if err != nil {
return err
}
// Deployment TappController
deployTappControllerErr := kubeClient.AppsV1().Deployments(metav1.NamespaceSystem).Delete(ctx, deployTappControllerName, metav1.DeleteOptions{})
// ClusterRoleBinding TappController
crbTappControllerErr := kubeClient.RbacV1().ClusterRoleBindings().Delete(ctx, crbTappControllerName, metav1.DeleteOptions{})
// ServiceAccount TappController
svcAccountTappControllerErr := kubeClient.CoreV1().ServiceAccounts(metav1.NamespaceSystem).Delete(ctx, svcAccountTappControllerName, metav1.DeleteOptions{})
// Service TappController
svcTappControllerErr := kubeClient.CoreV1().Services(metav1.NamespaceSystem).Delete(ctx, svcTappControllerName, metav1.DeleteOptions{})
if (deployTappControllerErr != nil && !errors.IsNotFound(deployTappControllerErr)) ||
(crbTappControllerErr != nil && !errors.IsNotFound(crbTappControllerErr)) ||
(svcAccountTappControllerErr != nil && !errors.IsNotFound(svcAccountTappControllerErr)) ||
(svcTappControllerErr != nil && !errors.IsNotFound(svcTappControllerErr)) {
return normalerrors.New("delete tapp controller error")
}
return nil
}
func (c *Controller) watchTappControllerHealth(ctx context.Context, key string) func() (bool, error) {
return func() (bool, error) {
log.Info("Start check tapp controller in cluster health", log.String("tappControllerName", key))
tappController, err := c.lister.Get(key)
if err != nil {
return false, err
}
cluster, err := c.client.PlatformV1().Clusters().Get(ctx, tappController.Spec.ClusterName, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
return false, err
}
if err != nil {
return false, nil
}
if _, ok := c.health.Load(key); !ok {
log.Info("Health check over.")
return true, nil
}
kubeClient, err := util.BuildExternalClientSet(ctx, cluster, c.client.PlatformV1())
if err != nil {
return false, err
}
// TODO: check tapp controller service
if _, err := kubeClient.AppsV1().Deployments(metav1.NamespaceSystem).Get(ctx, deployTappControllerName, metav1.GetOptions{}); err != nil {
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseFailed
tappController.Status.Reason = "Tapp controller is not healthy."
if err = c.persistUpdate(ctx, tappController); err != nil {
return false, err
}
return true, nil
}
return false, nil
}
}
func (c *Controller) checkTappControllerStatus(ctx context.Context, tappController *v1.TappController, key string, initDelay time.Time) func() (bool, error) {
return func() (bool, error) {
log.Info("Start to check tapp controller health", log.String("tappControllerName", tappController.Name))
cluster, err := c.client.PlatformV1().Clusters().Get(ctx, tappController.Spec.ClusterName, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
return false, err
}
if err != nil {
return false, nil
}
if _, ok := c.checking.Load(key); !ok {
log.Debug("Checking over tapp controller addon status")
return true, nil
}
kubeClient, err := util.BuildExternalClientSet(ctx, cluster, c.client.PlatformV1())
if err != nil {
return false, err
}
tappController, err := c.lister.Get(key)
if err != nil {
return false, err
}
if deploy, err := kubeClient.AppsV1().Deployments(metav1.NamespaceSystem).Get(ctx, deployTappControllerName, metav1.GetOptions{}); err != nil ||
(deploy.Spec.Replicas != nil && deploy.Status.AvailableReplicas < *deploy.Spec.Replicas) {
if time.Now().After(initDelay) {
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseFailed
tappController.Status.Reason = "Tapp controller is not healthy."
if err = c.persistUpdate(ctx, tappController); err != nil {
return false, err
}
return true, nil
}
return false, nil
}
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseRunning
tappController.Status.Reason = ""
if err = c.persistUpdate(ctx, tappController); err != nil {
return false, err
}
return true, nil
}
}
func (c *Controller) upgradeTappController(ctx context.Context, tappController *v1.TappController, key string, initDelay time.Time) func() (bool, error) {
return func() (bool, error) {
log.Info("Start to upgrade tapp controller", log.String("tappControllerName", tappController.Name))
cluster, err := c.client.PlatformV1().Clusters().Get(ctx, tappController.Spec.ClusterName, metav1.GetOptions{})
if err != nil && errors.IsNotFound(err) {
return false, err
}
if err != nil {
return false, nil
}
if _, ok := c.upgrading.Load(key); !ok {
log.Debug("Upgrading tapp controller", log.String("tappControllerName", tappController.Name))
return true, nil
}
kubeClient, err := util.BuildExternalClientSet(ctx, cluster, c.client.PlatformV1())
if err != nil {
return false, err
}
tappController, err := c.lister.Get(key)
if err != nil {
return false, err
}
newImage := images.Get(tappController.Spec.Version).TappController.FullName()
patch := fmt.Sprintf(`[{"op":"replace","path":"/spec/template/spec/containers/0/image","value":"%s"}]`, newImage)
if _, err := kubeClient.AppsV1().Deployments(metav1.NamespaceSystem).Patch(ctx, deployTappControllerName, types.JSONPatchType, []byte(patch), metav1.PatchOptions{}); err != nil {
if time.Now().After(initDelay) {
tappController = tappController.DeepCopy()
tappController.Status.Phase = v1.AddonPhaseFailed
tappController.Status.Reason = "Failed to upgrade tapp controller."
if err = c.persistUpdate(ctx, tappController); err != nil {
return false, err
}
return true, nil
}
return false, nil
}
tappController = tappController.DeepCopy()
tappController.Status.Version = tappController.Spec.Version
tappController.Status.Phase = v1.AddonPhaseChecking
tappController.Status.Reason = ""
if err = c.persistUpdate(ctx, tappController); err != nil {
return false, err
}
return true, nil
}
}
func (c *Controller) persistUpdate(ctx context.Context, tappController *v1.TappController) error {
var err error
for i := 0; i < clientRetryCount; i++ {
_, err = c.client.PlatformV1().TappControllers().UpdateStatus(ctx, tappController, metav1.UpdateOptions{})
if err == nil {
return nil
}
// If the object no longer exists, we don't want to recreate it. Just bail
// out so that we can process the delete, which we should soon be receiving
// if we haven't already.
if errors.IsNotFound(err) {
log.Info("Not persisting update to tappController that no longer exists", log.String("clusterName", tappController.Spec.ClusterName), log.Err(err))
return nil
}
if errors.IsConflict(err) {
return fmt.Errorf("not persisting update to tappController '%s' that has been changed since we received it: %v", tappController.Spec.ClusterName, err)
}
log.Warn(fmt.Sprintf("Failed to persist updated status of tappController '%s/%s'", tappController.Spec.ClusterName, tappController.Status.Phase), log.String("clusterName", tappController.Spec.ClusterName), log.Err(err))
time.Sleep(clientRetryInterval)
}
return err
}