示例#1
0
// manageReplicas checks and updates replicas for the given replication controller.
func (rm *ReplicationManager) manageReplicas(filteredPods []*api.Pod, rc *api.ReplicationController) {
	diff := len(filteredPods) - rc.Spec.Replicas
	rcKey, err := controller.KeyFunc(rc)
	if err != nil {
		glog.Errorf("Couldn't get key for replication controller %#v: %v", rc, err)
		return
	}
	if diff < 0 {
		diff *= -1
		if diff > rm.burstReplicas {
			diff = rm.burstReplicas
		}
		rm.expectations.ExpectCreations(rcKey, diff)
		wait := sync.WaitGroup{}
		wait.Add(diff)
		glog.V(2).Infof("Too few %q/%q replicas, need %d, creating %d", rc.Namespace, rc.Name, rc.Spec.Replicas, diff)
		for i := 0; i < diff; i++ {
			go func() {
				defer wait.Done()
				if err := rm.podControl.CreatePods(rc.Namespace, rc.Spec.Template, rc); err != nil {
					// Decrement the expected number of creates because the informer won't observe this pod
					glog.V(2).Infof("Failed creation, decrementing expectations for controller %q/%q", rc.Namespace, rc.Name)
					rm.expectations.CreationObserved(rcKey)
					util.HandleError(err)
				}
			}()
		}
		wait.Wait()
	} else if diff > 0 {
		if diff > rm.burstReplicas {
			diff = rm.burstReplicas
		}
		rm.expectations.ExpectDeletions(rcKey, diff)
		glog.V(2).Infof("Too many %q/%q replicas, need %d, deleting %d", rc.Namespace, rc.Name, rc.Spec.Replicas, diff)
		// No need to sort pods if we are about to delete all of them
		if rc.Spec.Replicas != 0 {
			// Sort the pods in the order such that not-ready < ready, unscheduled
			// < scheduled, and pending < running. This ensures that we delete pods
			// in the earlier stages whenever possible.
			sort.Sort(controller.ActivePods(filteredPods))
		}

		wait := sync.WaitGroup{}
		wait.Add(diff)
		for i := 0; i < diff; i++ {
			go func(ix int) {
				defer wait.Done()
				if err := rm.podControl.DeletePod(rc.Namespace, filteredPods[ix].Name); err != nil {
					// Decrement the expected number of deletes because the informer won't observe this deletion
					glog.V(2).Infof("Failed deletion, decrementing expectations for controller %q/%q", rc.Namespace, rc.Name)
					rm.expectations.DeletionObserved(rcKey)
				}
			}(i)
		}
		wait.Wait()
	}
}
示例#2
0
func (jm *JobController) manageJob(activePods []*api.Pod, succeeded int, job *extensions.Job) int {
	var activeLock sync.Mutex
	active := len(activePods)
	parallelism := *job.Spec.Parallelism
	jobKey, err := controller.KeyFunc(job)
	if err != nil {
		glog.Errorf("Couldn't get key for job %#v: %v", job, err)
		return 0
	}

	if active > parallelism {
		diff := active - parallelism
		jm.expectations.ExpectDeletions(jobKey, diff)
		glog.V(4).Infof("Too many pods running job %q, need %d, deleting %d", jobKey, parallelism, diff)
		// Sort the pods in the order such that not-ready < ready, unscheduled
		// < scheduled, and pending < running. This ensures that we delete pods
		// in the earlier stages whenever possible.
		sort.Sort(controller.ActivePods(activePods))

		active -= diff
		wait := sync.WaitGroup{}
		wait.Add(diff)
		for i := 0; i < diff; i++ {
			go func(ix int) {
				defer wait.Done()
				if err := jm.podControl.DeletePod(job.Namespace, activePods[ix].Name); err != nil {
					defer util.HandleError(err)
					// Decrement the expected number of deletes because the informer won't observe this deletion
					jm.expectations.DeletionObserved(jobKey)
					activeLock.Lock()
					active++
					activeLock.Unlock()
				}
			}(i)
		}
		wait.Wait()

	} else if active < parallelism {
		// how many executions are left to run
		diff := *job.Spec.Completions - succeeded
		// limit to parallelism and count active pods as well
		if diff > parallelism {
			diff = parallelism
		}
		diff -= active
		jm.expectations.ExpectCreations(jobKey, diff)
		glog.V(4).Infof("Too few pods running job %q, need %d, creating %d", jobKey, parallelism, diff)

		active += diff
		wait := sync.WaitGroup{}
		wait.Add(diff)
		for i := 0; i < diff; i++ {
			go func() {
				defer wait.Done()
				if err := jm.podControl.CreatePods(job.Namespace, &job.Spec.Template, job); err != nil {
					defer util.HandleError(err)
					// Decrement the expected number of creates because the informer won't observe this pod
					jm.expectations.CreationObserved(jobKey)
					activeLock.Lock()
					active--
					activeLock.Unlock()
				}
			}()
		}
		wait.Wait()
	}

	return active
}