163 lines
4.5 KiB
Go
163 lines
4.5 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package apiserver
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/golang/glog"
|
|
|
|
apierrors "k8s.io/kubernetes/pkg/api/errors"
|
|
"k8s.io/kubernetes/pkg/client/cache"
|
|
"k8s.io/kubernetes/pkg/controller"
|
|
utilruntime "k8s.io/kubernetes/pkg/util/runtime"
|
|
"k8s.io/kubernetes/pkg/util/wait"
|
|
"k8s.io/kubernetes/pkg/util/workqueue"
|
|
|
|
"k8s.io/kubernetes/cmd/kubernetes-discovery/pkg/apis/apiregistration"
|
|
informers "k8s.io/kubernetes/cmd/kubernetes-discovery/pkg/client/informers/apiregistration/internalversion"
|
|
listers "k8s.io/kubernetes/cmd/kubernetes-discovery/pkg/client/listers/apiregistration/internalversion"
|
|
)
|
|
|
|
type APIHandlerManager interface {
|
|
AddAPIService(apiServer *apiregistration.APIService)
|
|
RemoveAPIService(apiServerName string)
|
|
}
|
|
|
|
type APIServiceRegistrationController struct {
|
|
apiHandlerManager APIHandlerManager
|
|
|
|
apiServerLister listers.APIServiceLister
|
|
|
|
// To allow injection for testing.
|
|
syncFn func(key string) error
|
|
|
|
queue workqueue.RateLimitingInterface
|
|
}
|
|
|
|
func NewAPIServiceRegistrationController(apiServerInformer informers.APIServiceInformer, apiHandlerManager APIHandlerManager) *APIServiceRegistrationController {
|
|
c := &APIServiceRegistrationController{
|
|
apiHandlerManager: apiHandlerManager,
|
|
apiServerLister: apiServerInformer.Lister(),
|
|
queue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "APIServiceRegistrationController"),
|
|
}
|
|
|
|
apiServerInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
|
|
AddFunc: c.addAPIService,
|
|
UpdateFunc: c.updateAPIService,
|
|
DeleteFunc: c.deleteAPIService,
|
|
})
|
|
|
|
c.syncFn = c.sync
|
|
|
|
return c
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) sync(key string) error {
|
|
apiServer, err := c.apiServerLister.Get(key)
|
|
if apierrors.IsNotFound(err) {
|
|
c.apiHandlerManager.RemoveAPIService(key)
|
|
return nil
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
c.apiHandlerManager.AddAPIService(apiServer)
|
|
return nil
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) Run(stopCh <-chan struct{}) {
|
|
defer utilruntime.HandleCrash()
|
|
defer c.queue.ShutDown()
|
|
defer glog.Infof("Shutting down APIServiceRegistrationController")
|
|
|
|
glog.Infof("Starting APIServiceRegistrationController")
|
|
|
|
// only start one worker thread since its a slow moving API and the discovery server adding bits
|
|
// aren't threadsafe
|
|
go wait.Until(c.runWorker, time.Second, stopCh)
|
|
|
|
<-stopCh
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) runWorker() {
|
|
for c.processNextWorkItem() {
|
|
}
|
|
}
|
|
|
|
// processNextWorkItem deals with one key off the queue. It returns false when it's time to quit.
|
|
func (c *APIServiceRegistrationController) processNextWorkItem() bool {
|
|
key, quit := c.queue.Get()
|
|
if quit {
|
|
return false
|
|
}
|
|
defer c.queue.Done(key)
|
|
|
|
err := c.syncFn(key.(string))
|
|
if err == nil {
|
|
c.queue.Forget(key)
|
|
return true
|
|
}
|
|
|
|
utilruntime.HandleError(fmt.Errorf("%v failed with : %v", key, err))
|
|
c.queue.AddRateLimited(key)
|
|
|
|
return true
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) enqueue(obj *apiregistration.APIService) {
|
|
key, err := controller.KeyFunc(obj)
|
|
if err != nil {
|
|
glog.Errorf("Couldn't get key for object %#v: %v", obj, err)
|
|
return
|
|
}
|
|
|
|
c.queue.Add(key)
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) addAPIService(obj interface{}) {
|
|
castObj := obj.(*apiregistration.APIService)
|
|
glog.V(4).Infof("Adding %s", castObj.Name)
|
|
c.enqueue(castObj)
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) updateAPIService(obj, _ interface{}) {
|
|
castObj := obj.(*apiregistration.APIService)
|
|
glog.V(4).Infof("Updating %s", castObj.Name)
|
|
c.enqueue(castObj)
|
|
}
|
|
|
|
func (c *APIServiceRegistrationController) deleteAPIService(obj interface{}) {
|
|
castObj, ok := obj.(*apiregistration.APIService)
|
|
if !ok {
|
|
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
|
|
if !ok {
|
|
glog.Errorf("Couldn't get object from tombstone %#v", obj)
|
|
return
|
|
}
|
|
castObj, ok = tombstone.Obj.(*apiregistration.APIService)
|
|
if !ok {
|
|
glog.Errorf("Tombstone contained object that is not expected %#v", obj)
|
|
return
|
|
}
|
|
}
|
|
glog.V(4).Infof("Deleting %q", castObj.Name)
|
|
c.enqueue(castObj)
|
|
}
|