// syncReplicationController will sync the rc with the given key if it has had its expectations fulfilled, meaning
// it did not expect to see any more of its pods created or deleted. This function is not meant to be invoked
// concurrently with the same key.
func (rm *ReplicationManager) syncReplicationController(key string) error {
startTime := time.Now()
defer func() {
glog.V(4).Infof("Finished syncing controller %q (%v)", key, time.Now().Sub(startTime))
}()
obj, exists, err := rm.rcStore.Store.GetByKey(key)
if !exists {
glog.Infof("Replication Controller has been deleted %v", key)
rm.expectations.DeleteExpectations(key)
return nil
}
if err != nil {
glog.Infof("Unable to retrieve rc %v from store: %v", key, err)
rm.queue.Add(key)
return err
}
rc := *obj.(*api.ReplicationController)
if !rm.podStoreSynced() {
// Sleep so we give the pod reflector goroutine a chance to run.
time.Sleep(PodStoreSyncedPollPeriod)
glog.Infof("Waiting for pods controller to sync, requeuing rc %v", rc.Name)
rm.enqueueController(&rc)
return nil
}
// Check the expectations of the rc before counting active pods, otherwise a new pod can sneak in
// and update the expectations after we've retrieved active pods from the store. If a new pod enters
// the store after we've checked the expectation, the rc sync is just deferred till the next relist.
rcKey, err := controller.KeyFunc(&rc)
if err != nil {
glog.Errorf("Couldn't get key for replication controller %#v: %v", rc, err)
return err
}
rcNeedsSync := rm.expectations.SatisfiedExpectations(rcKey)
podList, err := rm.podStore.Pods(rc.Namespace).List(labels.Set(rc.Spec.Selector).AsSelector())
if err != nil {
glog.Errorf("Error getting pods for rc %q: %v", key, err)
rm.queue.Add(key)
return err
}
// TODO: Do this in a single pass, or use an index.
filteredPods := controller.FilterActivePods(podList.Items)
if rcNeedsSync {
rm.manageReplicas(filteredPods, &rc)
}
// Always updates status as pods come up or die.
if err := updateReplicaCount(rm.kubeClient.ReplicationControllers(rc.Namespace), rc, len(filteredPods)); err != nil {
// Multiple things could lead to this update failing. Requeuing the controller ensures
// we retry with some fairness.
glog.V(2).Infof("Failed to update replica count for controller %v, requeuing", rc.Name)
rm.enqueueController(&rc)
}
return nil
}
// syncJob will sync the job with the given key if it has had its expectations fulfilled, meaning
// it did not expect to see any more of its pods created or deleted. This function is not meant to be invoked
// concurrently with the same key.
func (jm *JobController) syncJob(key string) error {
startTime := time.Now()
defer func() {
glog.V(4).Infof("Finished syncing job %q (%v)", key, time.Now().Sub(startTime))
}()
obj, exists, err := jm.jobStore.Store.GetByKey(key)
if !exists {
glog.V(4).Infof("Job has been deleted: %v", key)
jm.expectations.DeleteExpectations(key)
return nil
}
if err != nil {
glog.Errorf("Unable to retrieve job %v from store: %v", key, err)
jm.queue.Add(key)
return err
}
job := *obj.(*extensions.Job)
if !jm.podStoreSynced() {
// Sleep so we give the pod reflector goroutine a chance to run.
time.Sleep(replicationcontroller.PodStoreSyncedPollPeriod)
glog.V(4).Infof("Waiting for pods controller to sync, requeuing job %v", job.Name)
jm.enqueueController(&job)
return nil
}
// Check the expectations of the job before counting active pods, otherwise a new pod can sneak in
// and update the expectations after we've retrieved active pods from the store. If a new pod enters
// the store after we've checked the expectation, the job sync is just deferred till the next relist.
jobKey, err := controller.KeyFunc(&job)
if err != nil {
glog.Errorf("Couldn't get key for job %#v: %v", job, err)
return err
}
jobNeedsSync := jm.expectations.SatisfiedExpectations(jobKey)
selector, _ := extensions.PodSelectorAsSelector(job.Spec.Selector)
podList, err := jm.podStore.Pods(job.Namespace).List(selector)
if err != nil {
glog.Errorf("Error getting pods for job %q: %v", key, err)
jm.queue.Add(key)
return err
}
activePods := controller.FilterActivePods(podList.Items)
active := len(activePods)
succeeded, failed := getStatus(podList.Items)
if jobNeedsSync {
active = jm.manageJob(activePods, succeeded, &job)
}
completions := succeeded
if completions == *job.Spec.Completions {
job.Status.Conditions = append(job.Status.Conditions, newCondition())
}
// no need to update the job if the status hasn't changed since last time
if job.Status.Active != active || job.Status.Succeeded != succeeded || job.Status.Failed != failed {
job.Status.Active = active
job.Status.Succeeded = succeeded
job.Status.Failed = failed
if err := jm.updateHandler(&job); err != nil {
glog.Errorf("Failed to update job %v, requeuing. Error: %v", job.Name, err)
jm.enqueueController(&job)
}
}
return nil
}