switch to use shared informer
This commit is contained in:
Minhan Xia
parent
46c73032bb
commit
3839faf536
3 changed files with 81 additions and 70 deletions
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@ -24,10 +24,11 @@ import (
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"github.com/golang/glog"
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api_v1 "k8s.io/api/core/v1"
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apiv1 "k8s.io/api/core/v1"
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extensions "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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informerv1 "k8s.io/client-go/informers/core/v1"
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informerv1beta1 "k8s.io/client-go/informers/extensions/v1beta1"
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"k8s.io/client-go/kubernetes"
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scheme "k8s.io/client-go/kubernetes/scheme"
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unversionedcore "k8s.io/client-go/kubernetes/typed/core/v1"
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@ -53,14 +54,42 @@ var (
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storeSyncPollPeriod = 5 * time.Second
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)
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// ControllerContext holds
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type ControllerContext struct {
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IngressInformer cache.SharedIndexInformer
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ServiceInformer cache.SharedIndexInformer
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PodInformer cache.SharedIndexInformer
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NodeInformer cache.SharedIndexInformer
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// Stop is the stop channel shared among controllers
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StopCh chan struct{}
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}
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func NewControllerContext(kubeClient kubernetes.Interface, namespace string, resyncPeriod time.Duration) *ControllerContext {
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return &ControllerContext{
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IngressInformer: informerv1beta1.NewIngressInformer(kubeClient, namespace, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}),
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ServiceInformer: informerv1.NewServiceInformer(kubeClient, namespace, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}),
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PodInformer: informerv1.NewPodInformer(kubeClient, namespace, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}),
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NodeInformer: informerv1.NewNodeInformer(kubeClient, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}),
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StopCh: make(chan struct{}),
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}
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}
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func (ctx *ControllerContext) Start() {
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go ctx.IngressInformer.Run(ctx.StopCh)
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go ctx.ServiceInformer.Run(ctx.StopCh)
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go ctx.PodInformer.Run(ctx.StopCh)
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go ctx.NodeInformer.Run(ctx.StopCh)
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}
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// LoadBalancerController watches the kubernetes api and adds/removes services
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// from the loadbalancer, via loadBalancerConfig.
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type LoadBalancerController struct {
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client kubernetes.Interface
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ingController cache.Controller
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nodeController cache.Controller
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svcController cache.Controller
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podController cache.Controller
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ingressSynced cache.InformerSynced
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serviceSynced cache.InformerSynced
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podSynced cache.InformerSynced
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nodeSynced cache.InformerSynced
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ingLister StoreToIngressLister
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nodeLister StoreToNodeLister
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svcLister StoreToServiceLister
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@ -90,7 +119,7 @@ type LoadBalancerController struct {
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// - clusterManager: A ClusterManager capable of creating all cloud resources
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// required for L7 loadbalancing.
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// - resyncPeriod: Watchers relist from the Kubernetes API server this often.
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func NewLoadBalancerController(kubeClient kubernetes.Interface, clusterManager *ClusterManager, resyncPeriod time.Duration, namespace string) (*LoadBalancerController, error) {
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func NewLoadBalancerController(kubeClient kubernetes.Interface, ctx *ControllerContext, clusterManager *ClusterManager) (*LoadBalancerController, error) {
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eventBroadcaster := record.NewBroadcaster()
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eventBroadcaster.StartLogging(glog.Infof)
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eventBroadcaster.StartRecordingToSink(&unversionedcore.EventSinkImpl{
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@ -99,23 +128,32 @@ func NewLoadBalancerController(kubeClient kubernetes.Interface, clusterManager *
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lbc := LoadBalancerController{
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client: kubeClient,
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CloudClusterManager: clusterManager,
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stopCh: make(chan struct{}),
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stopCh: ctx.StopCh,
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recorder: eventBroadcaster.NewRecorder(scheme.Scheme,
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api_v1.EventSource{Component: "loadbalancer-controller"}),
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apiv1.EventSource{Component: "loadbalancer-controller"}),
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}
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lbc.nodeQueue = NewTaskQueue(lbc.syncNodes)
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lbc.ingQueue = NewTaskQueue(lbc.sync)
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lbc.hasSynced = lbc.storesSynced
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// Ingress watch handlers
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pathHandlers := cache.ResourceEventHandlerFuncs{
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lbc.ingressSynced = ctx.IngressInformer.HasSynced
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lbc.serviceSynced = ctx.ServiceInformer.HasSynced
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lbc.podSynced = ctx.PodInformer.HasSynced
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lbc.nodeSynced = ctx.NodeInformer.HasSynced
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lbc.ingLister.Store = ctx.IngressInformer.GetStore()
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lbc.svcLister.Indexer = ctx.ServiceInformer.GetIndexer()
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lbc.podLister.Indexer = ctx.PodInformer.GetIndexer()
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lbc.nodeLister.Indexer = ctx.NodeInformer.GetIndexer()
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// ingress event handler
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ctx.IngressInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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addIng := obj.(*extensions.Ingress)
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if !isGCEIngress(addIng) {
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glog.Infof("Ignoring add for ingress %v based on annotation %v", addIng.Name, ingressClassKey)
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return
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}
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lbc.recorder.Eventf(addIng, api_v1.EventTypeNormal, "ADD", fmt.Sprintf("%s/%s", addIng.Namespace, addIng.Name))
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lbc.recorder.Eventf(addIng, apiv1.EventTypeNormal, "ADD", fmt.Sprintf("%s/%s", addIng.Namespace, addIng.Name))
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lbc.ingQueue.enqueue(obj)
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},
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DeleteFunc: func(obj interface{}) {
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@ -137,13 +175,10 @@ func NewLoadBalancerController(kubeClient kubernetes.Interface, clusterManager *
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}
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lbc.ingQueue.enqueue(cur)
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},
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}
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lbc.ingLister.Store, lbc.ingController = cache.NewInformer(
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cache.NewListWatchFromClient(lbc.client.Extensions().RESTClient(), "ingresses", namespace, fields.Everything()),
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&extensions.Ingress{}, resyncPeriod, pathHandlers)
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})
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// Service watch handlers
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svcHandlers := cache.ResourceEventHandlerFuncs{
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// service event handler
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ctx.ServiceInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
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AddFunc: lbc.enqueueIngressForService,
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UpdateFunc: func(old, cur interface{}) {
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if !reflect.DeepEqual(old, cur) {
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@ -151,38 +186,14 @@ func NewLoadBalancerController(kubeClient kubernetes.Interface, clusterManager *
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}
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},
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// Ingress deletes matter, service deletes don't.
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}
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})
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lbc.svcLister.Indexer, lbc.svcController = cache.NewIndexerInformer(
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cache.NewListWatchFromClient(lbc.client.Core().RESTClient(), "services", namespace, fields.Everything()),
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&api_v1.Service{},
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resyncPeriod,
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svcHandlers,
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cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
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)
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lbc.podLister.Indexer, lbc.podController = cache.NewIndexerInformer(
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cache.NewListWatchFromClient(lbc.client.Core().RESTClient(), "pods", namespace, fields.Everything()),
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&api_v1.Pod{},
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resyncPeriod,
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cache.ResourceEventHandlerFuncs{},
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cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
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)
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// Node watch handlers
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nodeHandlers := cache.ResourceEventHandlerFuncs{
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// node event handler
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ctx.NodeInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
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AddFunc: lbc.nodeQueue.enqueue,
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DeleteFunc: lbc.nodeQueue.enqueue,
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// Nodes are updated every 10s and we don't care, so no update handler.
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}
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lbc.nodeLister.Indexer, lbc.nodeController = cache.NewIndexerInformer(
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cache.NewListWatchFromClient(lbc.client.Core().RESTClient(), "nodes", api_v1.NamespaceAll, fields.Everything()),
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&api_v1.Node{},
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resyncPeriod,
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nodeHandlers,
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cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc},
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)
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})
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lbc.tr = &GCETranslator{&lbc}
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lbc.tlsLoader = &apiServerTLSLoader{client: lbc.client}
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@ -193,7 +204,7 @@ func NewLoadBalancerController(kubeClient kubernetes.Interface, clusterManager *
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// enqueueIngressForService enqueues all the Ingress' for a Service.
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func (lbc *LoadBalancerController) enqueueIngressForService(obj interface{}) {
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svc := obj.(*api_v1.Service)
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svc := obj.(*apiv1.Service)
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ings, err := lbc.ingLister.GetServiceIngress(svc)
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if err != nil {
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glog.V(5).Infof("ignoring service %v: %v", svc.Name, err)
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@ -210,10 +221,6 @@ func (lbc *LoadBalancerController) enqueueIngressForService(obj interface{}) {
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// Run starts the loadbalancer controller.
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func (lbc *LoadBalancerController) Run() {
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glog.Infof("Starting loadbalancer controller")
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go lbc.ingController.Run(lbc.stopCh)
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go lbc.nodeController.Run(lbc.stopCh)
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go lbc.svcController.Run(lbc.stopCh)
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go lbc.podController.Run(lbc.stopCh)
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go lbc.ingQueue.run(time.Second, lbc.stopCh)
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go lbc.nodeQueue.run(time.Second, lbc.stopCh)
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<-lbc.stopCh
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@ -250,14 +257,14 @@ func (lbc *LoadBalancerController) storesSynced() bool {
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return (
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// wait for pods to sync so we don't allocate a default health check when
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// an endpoint has a readiness probe.
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lbc.podController.HasSynced() &&
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lbc.podSynced() &&
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// wait for services so we don't thrash on backend creation.
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lbc.svcController.HasSynced() &&
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lbc.serviceSynced() &&
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// wait for nodes so we don't disconnect a backend from an instance
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// group just because we don't realize there are nodes in that zone.
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lbc.nodeController.HasSynced() &&
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lbc.nodeSynced() &&
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// Wait for ingresses as a safety measure. We don't really need this.
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lbc.ingController.HasSynced())
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lbc.ingressSynced())
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}
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// sync manages Ingress create/updates/deletes.
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@ -312,7 +319,7 @@ func (lbc *LoadBalancerController) sync(key string) (err error) {
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// TODO: Implement proper backoff for the queue.
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eventMsg := "GCE"
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if ingExists {
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lbc.recorder.Eventf(obj.(*extensions.Ingress), api_v1.EventTypeWarning, eventMsg, err.Error())
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lbc.recorder.Eventf(obj.(*extensions.Ingress), apiv1.EventTypeWarning, eventMsg, err.Error())
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} else {
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err = fmt.Errorf("%v, error: %v", eventMsg, err)
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}
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@ -333,10 +340,10 @@ func (lbc *LoadBalancerController) sync(key string) (err error) {
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if urlMap, err := lbc.tr.toURLMap(&ing); err != nil {
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syncError = fmt.Errorf("%v, convert to url map error %v", syncError, err)
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} else if err := l7.UpdateUrlMap(urlMap); err != nil {
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lbc.recorder.Eventf(&ing, api_v1.EventTypeWarning, "UrlMap", err.Error())
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lbc.recorder.Eventf(&ing, apiv1.EventTypeWarning, "UrlMap", err.Error())
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syncError = fmt.Errorf("%v, update url map error: %v", syncError, err)
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} else if err := lbc.updateIngressStatus(l7, ing); err != nil {
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lbc.recorder.Eventf(&ing, api_v1.EventTypeWarning, "Status", err.Error())
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lbc.recorder.Eventf(&ing, apiv1.EventTypeWarning, "Status", err.Error())
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syncError = fmt.Errorf("%v, update ingress error: %v", syncError, err)
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}
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return syncError
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@ -354,8 +361,8 @@ func (lbc *LoadBalancerController) updateIngressStatus(l7 *loadbalancers.L7, ing
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return err
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}
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currIng.Status = extensions.IngressStatus{
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LoadBalancer: api_v1.LoadBalancerStatus{
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Ingress: []api_v1.LoadBalancerIngress{
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LoadBalancer: apiv1.LoadBalancerStatus{
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Ingress: []apiv1.LoadBalancerIngress{
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{IP: ip},
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},
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},
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@ -369,7 +376,7 @@ func (lbc *LoadBalancerController) updateIngressStatus(l7 *loadbalancers.L7, ing
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if _, err := ingClient.UpdateStatus(currIng); err != nil {
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return err
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}
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lbc.recorder.Eventf(currIng, api_v1.EventTypeNormal, "CREATE", "ip: %v", ip)
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lbc.recorder.Eventf(currIng, apiv1.EventTypeNormal, "CREATE", "ip: %v", ip)
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}
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}
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// Update annotations through /update endpoint
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@ -437,11 +444,11 @@ func (lbc *LoadBalancerController) syncNodes(key string) error {
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}
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func getNodeReadyPredicate() listers.NodeConditionPredicate {
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return func(node *api_v1.Node) bool {
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return func(node *apiv1.Node) bool {
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for ix := range node.Status.Conditions {
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condition := &node.Status.Conditions[ix]
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if condition.Type == api_v1.NodeReady {
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return condition.Status == api_v1.ConditionTrue
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if condition.Type == apiv1.NodeReady {
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return condition.Status == apiv1.ConditionTrue
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}
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}
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return false
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@ -53,7 +53,8 @@ func defaultBackendName(clusterName string) string {
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// newLoadBalancerController create a loadbalancer controller.
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func newLoadBalancerController(t *testing.T, cm *fakeClusterManager) *LoadBalancerController {
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kubeClient := fake.NewSimpleClientset()
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lb, err := NewLoadBalancerController(kubeClient, cm.ClusterManager, 1*time.Second, api_v1.NamespaceAll)
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ctx := NewControllerContext(kubeClient, api_v1.NamespaceAll, 1*time.Second)
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lb, err := NewLoadBalancerController(kubeClient, ctx, cm.ClusterManager)
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if err != nil {
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t.Fatalf("%v", err)
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}
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@ -256,8 +256,10 @@ func main() {
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clusterManager = controller.NewFakeClusterManager(*clusterName, controller.DefaultFirewallName).ClusterManager
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}
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ctx := controller.NewControllerContext(kubeClient, *watchNamespace, *resyncPeriod)
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// Start loadbalancer controller
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lbc, err := controller.NewLoadBalancerController(kubeClient, clusterManager, *resyncPeriod, *watchNamespace)
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lbc, err := controller.NewLoadBalancerController(kubeClient, ctx, clusterManager)
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if err != nil {
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glog.Fatalf("%v", err)
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}
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@ -268,6 +270,7 @@ func main() {
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go registerHandlers(lbc)
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go handleSigterm(lbc, *deleteAllOnQuit)
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ctx.Start()
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lbc.Run()
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for {
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glog.Infof("Handled quit, awaiting pod deletion.")
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