mirror of https://github.com/k3s-io/k3s
Merge pull request #30207 from mwielgus/namespace-controller
Automatic merge from submit-queue Federated namespace controller Implemented based on federation common libs. Depends on #30126. cc: @quinton-hoole @wojtek-t @kubernetes/sig-cluster-federationpull/6/head
Kubernetes Submit Queue
GitHub
commit
3a938dac07
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@ -30,6 +30,7 @@ import (
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"k8s.io/kubernetes/federation/cmd/federation-controller-manager/app/options"
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"k8s.io/kubernetes/federation/pkg/dnsprovider"
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clustercontroller "k8s.io/kubernetes/federation/pkg/federation-controller/cluster"
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namespacecontroller "k8s.io/kubernetes/federation/pkg/federation-controller/namespace"
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servicecontroller "k8s.io/kubernetes/federation/pkg/federation-controller/service"
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"k8s.io/kubernetes/federation/pkg/federation-controller/util"
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"k8s.io/kubernetes/pkg/client/restclient"
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@ -144,5 +145,10 @@ func StartControllers(s *options.CMServer, restClientCfg *restclient.Config) err
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if err := servicecontroller.Run(s.ConcurrentServiceSyncs, wait.NeverStop); err != nil {
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glog.Errorf("Failed to start service controller: %v", err)
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}
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nsClientset := federationclientset.NewForConfigOrDie(restclient.AddUserAgent(restClientCfg, "namespace-controller"))
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namespaceController := namespacecontroller.NewNamespaceController(nsClientset)
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namespaceController.Run(wait.NeverStop)
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select {}
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}
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@ -0,0 +1,302 @@
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/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package namespace
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import (
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"reflect"
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"time"
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federation_api "k8s.io/kubernetes/federation/apis/federation/v1beta1"
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federation_release_1_4 "k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_4"
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"k8s.io/kubernetes/federation/pkg/federation-controller/util"
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"k8s.io/kubernetes/pkg/api"
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api_v1 "k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/cache"
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"k8s.io/kubernetes/pkg/controller"
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"k8s.io/kubernetes/pkg/controller/framework"
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pkg_runtime "k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/util/flowcontrol"
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"k8s.io/kubernetes/pkg/watch"
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"github.com/golang/glog"
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)
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const (
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allClustersKey = "ALL_CLUSTERS"
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)
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type NamespaceController struct {
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// For triggering single namespace reconcilation. This is used when there is an
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// add/update/delete operation on a namespace in either federated API server or
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// in some member of the federation.
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namespaceDeliverer *util.DelayingDeliverer
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// For triggering all namespaces reconcilation. This is used when
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// a new cluster becomes available.
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clusterDeliverer *util.DelayingDeliverer
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// Contains namespaces present in members of federation.
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namespaceFederatedInformer util.FederatedInformer
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// For updating members of federation.
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federatedUpdater util.FederatedUpdater
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// Definitions of namespaces that should be federated.
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namespaceInformerStore cache.Store
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// Informer controller for namespaces that should be federated.
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namespaceInformerController framework.ControllerInterface
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// Client to federated api server.
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federatedApiClient federation_release_1_4.Interface
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// Backoff manager for namespaces
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namespaceBackoff *flowcontrol.Backoff
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namespaceReviewDelay time.Duration
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clusterAvailableDelay time.Duration
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smallDelay time.Duration
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updateTimeout time.Duration
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}
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// NewNamespaceController returns a new namespace controller
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func NewNamespaceController(client federation_release_1_4.Interface) *NamespaceController {
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nc := &NamespaceController{
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federatedApiClient: client,
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namespaceReviewDelay: time.Second * 10,
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clusterAvailableDelay: time.Second * 20,
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smallDelay: time.Second * 3,
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updateTimeout: time.Second * 30,
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namespaceBackoff: flowcontrol.NewBackOff(5*time.Second, time.Minute),
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}
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// Build delivereres for triggering reconcilations.
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nc.namespaceDeliverer = util.NewDelayingDeliverer()
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nc.clusterDeliverer = util.NewDelayingDeliverer()
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// Start informer in federated API servers on namespaces that should be federated.
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nc.namespaceInformerStore, nc.namespaceInformerController = framework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (pkg_runtime.Object, error) {
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return client.Core().Namespaces().List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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return client.Core().Namespaces().Watch(options)
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},
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},
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&api_v1.Namespace{},
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controller.NoResyncPeriodFunc(),
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util.NewTriggerOnAllChanges(func(obj pkg_runtime.Object) { nc.deliverNamespaceObj(obj, 0, false) }))
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// Federated informer on namespaces in members of federation.
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nc.namespaceFederatedInformer = util.NewFederatedInformer(
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client,
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func(cluster *federation_api.Cluster, targetClient federation_release_1_4.Interface) (cache.Store, framework.ControllerInterface) {
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return framework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (pkg_runtime.Object, error) {
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return targetClient.Core().Namespaces().List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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return targetClient.Core().Namespaces().Watch(options)
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},
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},
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&api_v1.Namespace{},
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controller.NoResyncPeriodFunc(),
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// Trigger reconcilation whenever something in federated cluster is changed. In most cases it
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// would be just confirmation that some namespace opration suceeded.
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util.NewTriggerOnMetaAndSpecChangesPreproc(
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func(obj pkg_runtime.Object) { nc.deliverNamespaceObj(obj, nc.namespaceReviewDelay, false) },
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func(obj pkg_runtime.Object) { util.SetClusterName(obj, cluster.Name) },
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))
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},
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&util.ClusterLifecycleHandlerFuncs{
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ClusterAvailable: func(cluster *federation_api.Cluster) {
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// When new cluster becomes available process all the namespaces again.
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nc.clusterDeliverer.DeliverAfter(allClustersKey, nil, nc.clusterAvailableDelay)
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},
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},
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)
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// Federated updeater along with Create/Update/Delete operations.
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nc.federatedUpdater = util.NewFederatedUpdater(nc.namespaceFederatedInformer,
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func(client federation_release_1_4.Interface, obj pkg_runtime.Object) error {
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namespace := obj.(*api_v1.Namespace)
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_, err := client.Core().Namespaces().Create(namespace)
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return err
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},
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func(client federation_release_1_4.Interface, obj pkg_runtime.Object) error {
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namespace := obj.(*api_v1.Namespace)
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_, err := client.Core().Namespaces().Update(namespace)
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return err
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},
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func(client federation_release_1_4.Interface, obj pkg_runtime.Object) error {
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namespace := obj.(*api_v1.Namespace)
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err := client.Core().Namespaces().Delete(namespace.Name, &api.DeleteOptions{})
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return err
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})
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return nc
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}
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func (nc *NamespaceController) Run(stopChan <-chan struct{}) {
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go nc.namespaceInformerController.Run(stopChan)
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nc.namespaceFederatedInformer.Start()
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go func() {
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<-stopChan
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nc.namespaceFederatedInformer.Stop()
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}()
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nc.namespaceDeliverer.StartWithHandler(func(item *util.DelayingDelivererItem) {
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namespace := item.Value.(string)
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nc.reconcileNamespace(namespace)
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})
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nc.clusterDeliverer.StartWithHandler(func(_ *util.DelayingDelivererItem) {
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nc.reconcileNamespacesOnClusterChange()
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})
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go func() {
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select {
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case <-time.After(time.Minute):
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nc.namespaceBackoff.GC()
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case <-stopChan:
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return
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}
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}()
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}
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func (nc *NamespaceController) deliverNamespaceObj(obj interface{}, delay time.Duration, failed bool) {
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namespace := obj.(*api_v1.Namespace)
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nc.deliverNamespace(namespace.Name, delay, failed)
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}
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// Adds backoff to delay if this delivery is related to some failure. Resets backoff if there was no failure.
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func (nc *NamespaceController) deliverNamespace(namespace string, delay time.Duration, failed bool) {
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if failed {
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nc.namespaceBackoff.Next(namespace, time.Now())
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delay = delay + nc.namespaceBackoff.Get(namespace)
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} else {
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nc.namespaceBackoff.Reset(namespace)
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}
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nc.namespaceDeliverer.DeliverAfter(namespace, namespace, delay)
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}
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// Check whether all data stores are in sync. False is returned if any of the informer/stores is not yet
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// synced with the coresponding api server.
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func (nc *NamespaceController) isSynced() bool {
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if !nc.namespaceFederatedInformer.ClustersSynced() {
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glog.V(2).Infof("Cluster list not synced")
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return false
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}
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clusters, err := nc.namespaceFederatedInformer.GetReadyClusters()
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if err != nil {
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glog.Errorf("Failed to get ready clusters: %v", err)
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return false
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}
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if !nc.namespaceFederatedInformer.GetTargetStore().ClustersSynced(clusters) {
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return false
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}
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return true
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}
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// The function triggers reconcilation of all federated namespaces.
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func (nc *NamespaceController) reconcileNamespacesOnClusterChange() {
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if !nc.isSynced() {
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nc.clusterDeliverer.DeliverAfter(allClustersKey, nil, nc.clusterAvailableDelay)
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}
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for _, obj := range nc.namespaceInformerStore.List() {
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namespace := obj.(*api_v1.Namespace)
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nc.deliverNamespace(namespace.Name, nc.smallDelay, false)
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}
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}
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func (nc *NamespaceController) reconcileNamespace(namespace string) {
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if !nc.isSynced() {
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nc.deliverNamespace(namespace, nc.clusterAvailableDelay, false)
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}
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baseNamespaceObj, exist, err := nc.namespaceInformerStore.GetByKey(namespace)
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if err != nil {
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glog.Errorf("Failed to query main namespace store for %v: %v", namespace, err)
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nc.deliverNamespace(namespace, 0, true)
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return
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}
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if !exist {
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// Not federated namespace, ignoring.
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return
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}
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baseNamespace := baseNamespaceObj.(*api_v1.Namespace)
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if baseNamespace.Status.Phase == api_v1.NamespaceTerminating {
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// TODO: What about namespaces in subclusters ???
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err = nc.federatedApiClient.Core().Namespaces().Delete(baseNamespace.Name, &api.DeleteOptions{})
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if err != nil {
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glog.Errorf("Failed to delete namespace %s: %v", baseNamespace.Name, err)
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nc.deliverNamespace(namespace, 0, true)
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}
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return
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}
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clusters, err := nc.namespaceFederatedInformer.GetReadyClusters()
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if err != nil {
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glog.Errorf("Failed to get cluster list: %v", err)
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nc.deliverNamespace(namespace, nc.clusterAvailableDelay, false)
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return
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}
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operations := make([]util.FederatedOperation, 0)
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for _, cluster := range clusters {
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clusterNamespaceObj, found, err := nc.namespaceFederatedInformer.GetTargetStore().GetByKey(cluster.Name, namespace)
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if err != nil {
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glog.Errorf("Failed to get %s from %s: %v", namespace, cluster.Name, err)
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nc.deliverNamespace(namespace, 0, true)
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return
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}
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desiredNamespace := &api_v1.Namespace{
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ObjectMeta: baseNamespace.ObjectMeta,
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Spec: baseNamespace.Spec,
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}
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util.SetClusterName(desiredNamespace, cluster.Name)
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if !found {
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operations = append(operations, util.FederatedOperation{
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Type: util.OperationTypeAdd,
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Obj: desiredNamespace,
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})
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} else {
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clusterNamespace := clusterNamespaceObj.(*api_v1.Namespace)
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// Update existing namespace, if needed.
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if !reflect.DeepEqual(desiredNamespace.ObjectMeta, clusterNamespace.ObjectMeta) ||
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!reflect.DeepEqual(desiredNamespace.Spec, clusterNamespace.Spec) {
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operations = append(operations, util.FederatedOperation{
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Type: util.OperationTypeUpdate,
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Obj: desiredNamespace,
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})
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}
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}
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}
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if len(operations) == 0 {
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// Everything is in order
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return
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}
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err = nc.federatedUpdater.Update(operations, nc.updateTimeout)
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if err != nil {
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glog.Errorf("Failed to execute updates for %s: %v", namespace, err)
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nc.deliverNamespace(namespace, 0, true)
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return
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}
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// Evertyhing is in order but lets be double sure
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nc.deliverNamespace(namespace, nc.namespaceReviewDelay, false)
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}
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|
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@ -0,0 +1,175 @@
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/*
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Copyright 2016 The Kubernetes Authors.
|
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|
||||
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 namespace
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|
||||
import (
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"fmt"
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"testing"
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"time"
|
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|
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federation_api "k8s.io/kubernetes/federation/apis/federation/v1beta1"
|
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federation_release_1_4 "k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_4"
|
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fake_federation_release_1_4 "k8s.io/kubernetes/federation/client/clientset_generated/federation_release_1_4/fake"
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"k8s.io/kubernetes/federation/pkg/federation-controller/util"
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api_v1 "k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/client/testing/core"
|
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"k8s.io/kubernetes/pkg/runtime"
|
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"k8s.io/kubernetes/pkg/watch"
|
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|
||||
"github.com/stretchr/testify/assert"
|
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)
|
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|
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func TestNamespaceController(t *testing.T) {
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cluster1 := mkCluster("cluster1", api_v1.ConditionTrue)
|
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cluster2 := mkCluster("cluster2", api_v1.ConditionTrue)
|
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|
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fakeClient := &fake_federation_release_1_4.Clientset{}
|
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RegisterList("clusters", fakeClient, &federation_api.ClusterList{Items: []federation_api.Cluster{*cluster1}})
|
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RegisterList("namespaces", fakeClient, &api_v1.NamespaceList{Items: []api_v1.Namespace{}})
|
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namespaceWatch := RegisterWatch("namespaces", fakeClient)
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clusterWatch := RegisterWatch("clusters", fakeClient)
|
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|
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cluster1Client := &fake_federation_release_1_4.Clientset{}
|
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cluster1Watch := RegisterWatch("namespaces", cluster1Client)
|
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RegisterList("namespaces", cluster1Client, &api_v1.NamespaceList{Items: []api_v1.Namespace{}})
|
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cluster1CreateChan := RegisterCopyOnCreate("namespaces", cluster1Client, cluster1Watch)
|
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cluster1UpdateChan := RegisterCopyOnUpdate("namespaces", cluster1Client, cluster1Watch)
|
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|
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cluster2Client := &fake_federation_release_1_4.Clientset{}
|
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cluster2Watch := RegisterWatch("namespaces", cluster2Client)
|
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RegisterList("namespaces", cluster2Client, &api_v1.NamespaceList{Items: []api_v1.Namespace{}})
|
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cluster2CreateChan := RegisterCopyOnCreate("namespaces", cluster2Client, cluster2Watch)
|
||||
|
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namespaceController := NewNamespaceController(fakeClient)
|
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informer := toFederatedInformerForTestOnly(namespaceController.namespaceFederatedInformer)
|
||||
informer.SetClientFactory(func(cluster *federation_api.Cluster) (federation_release_1_4.Interface, error) {
|
||||
switch cluster.Name {
|
||||
case cluster1.Name:
|
||||
return cluster1Client, nil
|
||||
case cluster2.Name:
|
||||
return cluster2Client, nil
|
||||
default:
|
||||
return nil, fmt.Errorf("Unknown cluster")
|
||||
}
|
||||
})
|
||||
namespaceController.clusterAvailableDelay = time.Second
|
||||
namespaceController.namespaceReviewDelay = 50 * time.Millisecond
|
||||
namespaceController.smallDelay = 20 * time.Millisecond
|
||||
namespaceController.updateTimeout = 5 * time.Second
|
||||
|
||||
stop := make(chan struct{})
|
||||
namespaceController.Run(stop)
|
||||
|
||||
ns1 := api_v1.Namespace{
|
||||
ObjectMeta: api_v1.ObjectMeta{
|
||||
Name: "test-namespace",
|
||||
},
|
||||
}
|
||||
|
||||
// Test add federated namespace.
|
||||
namespaceWatch.Add(&ns1)
|
||||
createdNamespace := GetNamespaceFromChan(cluster1CreateChan)
|
||||
assert.NotNil(t, createdNamespace)
|
||||
assert.Equal(t, ns1.Name, createdNamespace.Name)
|
||||
|
||||
// Test update federated namespace.
|
||||
ns1.Annotations = map[string]string{
|
||||
"A": "B",
|
||||
}
|
||||
namespaceWatch.Modify(&ns1)
|
||||
updatedNamespace := GetNamespaceFromChan(cluster1UpdateChan)
|
||||
assert.NotNil(t, updatedNamespace)
|
||||
assert.Equal(t, ns1.Name, updatedNamespace.Name)
|
||||
// assert.Contains(t, updatedNamespace.Annotations, "A")
|
||||
|
||||
// Test add cluster
|
||||
clusterWatch.Add(cluster2)
|
||||
createdNamespace2 := GetNamespaceFromChan(cluster2CreateChan)
|
||||
assert.NotNil(t, createdNamespace2)
|
||||
assert.Equal(t, ns1.Name, createdNamespace2.Name)
|
||||
// assert.Contains(t, createdNamespace2.Annotations, "A")
|
||||
|
||||
close(stop)
|
||||
}
|
||||
|
||||
func toFederatedInformerForTestOnly(informer util.FederatedInformer) util.FederatedInformerForTestOnly {
|
||||
inter := informer.(interface{})
|
||||
return inter.(util.FederatedInformerForTestOnly)
|
||||
}
|
||||
|
||||
func mkCluster(name string, readyStatus api_v1.ConditionStatus) *federation_api.Cluster {
|
||||
return &federation_api.Cluster{
|
||||
ObjectMeta: api_v1.ObjectMeta{
|
||||
Name: name,
|
||||
},
|
||||
Status: federation_api.ClusterStatus{
|
||||
Conditions: []federation_api.ClusterCondition{
|
||||
{Type: federation_api.ClusterReady, Status: readyStatus},
|
||||
},
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func RegisterWatch(resource string, client *fake_federation_release_1_4.Clientset) *watch.FakeWatcher {
|
||||
watcher := watch.NewFake()
|
||||
client.AddWatchReactor(resource, func(action core.Action) (bool, watch.Interface, error) { return true, watcher, nil })
|
||||
return watcher
|
||||
}
|
||||
|
||||
func RegisterList(resource string, client *fake_federation_release_1_4.Clientset, obj runtime.Object) {
|
||||
client.AddReactor("list", resource, func(action core.Action) (bool, runtime.Object, error) {
|
||||
return true, obj, nil
|
||||
})
|
||||
}
|
||||
|
||||
func RegisterCopyOnCreate(resource string, client *fake_federation_release_1_4.Clientset, watcher *watch.FakeWatcher) chan runtime.Object {
|
||||
objChan := make(chan runtime.Object, 100)
|
||||
client.AddReactor("create", resource, func(action core.Action) (bool, runtime.Object, error) {
|
||||
createAction := action.(core.CreateAction)
|
||||
obj := createAction.GetObject()
|
||||
go func() {
|
||||
watcher.Add(obj)
|
||||
objChan <- obj
|
||||
}()
|
||||
return true, obj, nil
|
||||
})
|
||||
return objChan
|
||||
}
|
||||
|
||||
func RegisterCopyOnUpdate(resource string, client *fake_federation_release_1_4.Clientset, watcher *watch.FakeWatcher) chan runtime.Object {
|
||||
objChan := make(chan runtime.Object, 100)
|
||||
client.AddReactor("update", resource, func(action core.Action) (bool, runtime.Object, error) {
|
||||
updateAction := action.(core.UpdateAction)
|
||||
obj := updateAction.GetObject()
|
||||
go func() {
|
||||
watcher.Modify(obj)
|
||||
objChan <- obj
|
||||
}()
|
||||
return true, obj, nil
|
||||
})
|
||||
return objChan
|
||||
}
|
||||
|
||||
func GetNamespaceFromChan(c chan runtime.Object) *api_v1.Namespace {
|
||||
select {
|
||||
case obj := <-c:
|
||||
namespace := obj.(*api_v1.Namespace)
|
||||
return namespace
|
||||
case <-time.After(time.Minute):
|
||||
return nil
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue