add cluster api group (#1992)
This commit is contained in:
zryfish
230
pkg/controller/cluster/cluster_controller.go
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230
pkg/controller/cluster/cluster_controller.go
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@@ -0,0 +1,230 @@
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package cluster
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import (
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"fmt"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/kubernetes/scheme"
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v1core "k8s.io/client-go/kubernetes/typed/core/v1"
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"k8s.io/client-go/tools/cache"
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"k8s.io/client-go/tools/record"
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"k8s.io/client-go/util/retry"
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"k8s.io/client-go/util/workqueue"
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"k8s.io/klog"
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clusterv1alpha1 "kubesphere.io/kubesphere/pkg/apis/cluster/v1alpha1"
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clusterclient "kubesphere.io/kubesphere/pkg/client/clientset/versioned/typed/cluster/v1alpha1"
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clusterinformer "kubesphere.io/kubesphere/pkg/client/informers/externalversions/cluster/v1alpha1"
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clusterlister "kubesphere.io/kubesphere/pkg/client/listers/cluster/v1alpha1"
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"time"
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)
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const (
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// maxRetries is the number of times a service will be retried before it is dropped out of the queue.
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// With the current rate-limiter in use (5ms*2^(maxRetries-1)) the following numbers represent the
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// sequence of delays between successive queuings of a service.
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//
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// 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, 320ms, 640ms, 1.3s, 2.6s, 5.1s, 10.2s, 20.4s, 41s, 82s
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maxRetries = 15
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)
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type ClusterController struct {
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eventBroadcaster record.EventBroadcaster
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eventRecorder record.EventRecorder
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agentClient clusterclient.AgentInterface
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clusterClient clusterclient.ClusterInterface
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agentLister clusterlister.AgentLister
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agentHasSynced cache.InformerSynced
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clusterLister clusterlister.ClusterLister
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clusterHasSynced cache.InformerSynced
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queue workqueue.RateLimitingInterface
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workerLoopPeriod time.Duration
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}
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func NewClusterController(
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client kubernetes.Interface,
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clusterInformer clusterinformer.ClusterInformer,
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agentInformer clusterinformer.AgentInformer,
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agentClient clusterclient.AgentInterface,
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clusterClient clusterclient.ClusterInterface,
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) *ClusterController {
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broadcaster := record.NewBroadcaster()
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broadcaster.StartLogging(func(format string, args ...interface{}) {
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klog.Info(fmt.Sprintf(format, args))
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})
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broadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: client.CoreV1().Events("")})
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recorder := broadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "cluster-controller"})
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c := &ClusterController{
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eventBroadcaster: broadcaster,
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eventRecorder: recorder,
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agentClient: agentClient,
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clusterClient: clusterClient,
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queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "cluster"),
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workerLoopPeriod: time.Second,
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}
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c.agentLister = agentInformer.Lister()
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c.agentHasSynced = agentInformer.Informer().HasSynced
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c.clusterLister = clusterInformer.Lister()
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c.clusterHasSynced = clusterInformer.Informer().HasSynced
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clusterInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
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AddFunc: c.addCluster,
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UpdateFunc: func(oldObj, newObj interface{}) {
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c.addCluster(newObj)
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},
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DeleteFunc: c.addCluster,
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})
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return c
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}
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func (c *ClusterController) Start(stopCh <-chan struct{}) error {
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return c.Run(5, stopCh)
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}
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func (c *ClusterController) Run(workers int, stopCh <-chan struct{}) error {
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defer utilruntime.HandleCrash()
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defer c.queue.ShutDown()
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klog.V(0).Info("starting cluster controller")
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defer klog.Info("shutting down cluster controller")
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if !cache.WaitForCacheSync(stopCh, c.clusterHasSynced, c.agentHasSynced) {
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return fmt.Errorf("failed to wait for caches to sync")
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}
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for i := 0; i < workers; i++ {
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go wait.Until(c.worker, c.workerLoopPeriod, stopCh)
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}
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<-stopCh
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return nil
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}
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func (c *ClusterController) worker() {
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for c.processNextItem() {
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}
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}
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func (c *ClusterController) processNextItem() bool {
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key, quit := c.queue.Get()
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if quit {
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return false
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}
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defer c.queue.Done(key)
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err := c.syncCluster(key.(string))
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c.handleErr(err, key)
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return true
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}
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func (c *ClusterController) syncCluster(key string) error {
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startTime := time.Now()
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_, name, err := cache.SplitMetaNamespaceKey(key)
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if err != nil {
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klog.Errorf("not a valid controller key %s, %#v", key, err)
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return err
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}
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defer func() {
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klog.V(4).Info("Finished syncing cluster.", "name", name, "duration", time.Since(startTime))
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}()
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cluster, err := c.clusterLister.Get(name)
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if err != nil {
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// cluster not found, possibly been deleted
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// need to do the cleanup
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if errors.IsNotFound(err) {
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_, err = c.agentLister.Get(name)
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if err != nil && errors.IsNotFound(err) {
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return nil
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}
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if err != nil {
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klog.Errorf("Failed to get cluster agent %s, %#v", name, err)
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return err
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}
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// do the real cleanup work
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err = c.agentClient.Delete(name, &metav1.DeleteOptions{})
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return err
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}
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klog.Errorf("Failed to get cluster with name %s, %#v", name, err)
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return err
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}
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newAgent := &clusterv1alpha1.Agent{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"app.kubernetes.io/name": "tower",
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"cluster.kubesphere.io/name": name,
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},
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},
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Spec: clusterv1alpha1.AgentSpec{
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Token: "",
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KubeSphereAPIServerPort: 0,
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KubernetesAPIServerPort: 0,
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Proxy: "",
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Paused: !cluster.Spec.Active,
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},
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}
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agent, err := c.agentLister.Get(name)
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if err != nil && errors.IsNotFound(err) {
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agent, err = c.agentClient.Create(newAgent)
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if err != nil {
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klog.Errorf("Failed to create agent %s, %#v", name, err)
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return err
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}
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return nil
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}
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if err != nil {
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klog.Errorf("Failed to get agent %s, %#v", name, err)
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return err
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}
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if agent.Spec.Paused != newAgent.Spec.Paused {
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agent.Spec.Paused = newAgent.Spec.Paused
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return retry.RetryOnConflict(retry.DefaultBackoff, func() error {
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_, err = c.agentClient.Update(agent)
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return err
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})
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}
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return nil
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}
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func (c *ClusterController) addCluster(obj interface{}) {
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cluster := obj.(*clusterv1alpha1.Cluster)
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key, err := cache.MetaNamespaceKeyFunc(obj)
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if err != nil {
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utilruntime.HandleError(fmt.Errorf("get cluster key %s/%s failed", cluster.Namespace, cluster.Name))
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return
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}
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c.queue.Add(key)
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}
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func (c *ClusterController) handleErr(err error, key interface{}) {
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}
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