// UpdatePodWithRetries updates a pod with given applyUpdate function. Note that pod not found error is ignored.
// The returned bool value can be used to tell if the pod is actually updated.
func UpdatePodWithRetries(podClient v1core.PodInterface, podLister *cache.StoreToPodLister, namespace, name string, applyUpdate updatePodFunc) (*v1.Pod, error) {
var pod *v1.Pod
retryErr := retry.RetryOnConflict(retry.DefaultBackoff, func() error {
var err error
pod, err = podLister.Pods(namespace).Get(name)
if err != nil {
return err
}
obj, deepCopyErr := api.Scheme.DeepCopy(pod)
if deepCopyErr != nil {
return deepCopyErr
}
pod = obj.(*v1.Pod)
// Apply the update, then attempt to push it to the apiserver.
if applyErr := applyUpdate(pod); applyErr != nil {
return applyErr
}
pod, err = podClient.Update(pod)
return err
})
// Ignore the precondition violated error, this pod is already updated
// with the desired label.
if retryErr == errorsutil.ErrPreconditionViolated {
glog.V(4).Infof("Pod %s/%s precondition doesn't hold, skip updating it.", namespace, name)
retryErr = nil
}
return pod, retryErr
}
func filterPods(store cache.StoreToPodLister, podList []string) []string {
filteredList := make([]string, 0, len(podList))
for _, key := range podList {
item, exists, err := store.GetByKey(key)
if err != nil || !exists {
continue
}
pod := item.(*api.Pod)
if IgnorePod(pod) {
continue
}
filteredList = append(filteredList, key)
}
return filteredList
}