func crossScaled(c unversioned.Interface, oldRC, newRC *api.ReplicationController, settleDuration time.Duration) wait.ConditionFunc {
oldRCReady := unversioned.ControllerHasDesiredReplicas(c, oldRC)
newRCReady := unversioned.ControllerHasDesiredReplicas(c, newRC)
oldRCPodsReady := desiredPodsAreReady(c, oldRC, settleDuration)
newRCPodsReady := desiredPodsAreReady(c, newRC, settleDuration)
return func() (done bool, err error) {
if ok, err := oldRCReady(); err != nil || !ok {
return ok, err
}
if ok, err := newRCReady(); err != nil || !ok {
return ok, err
}
if ok, err := oldRCPodsReady(); err != nil || !ok {
return ok, err
}
if ok, err := newRCPodsReady(); err != nil || !ok {
return ok, err
}
return true, nil
}
}
// Scale updates a ReplicationController to a new size, with optional precondition check (if preconditions is not nil),
// optional retries (if retry is not nil), and then optionally waits for it's replica count to reach the new value
// (if wait is not nil).
func (scaler *ReplicationControllerScaler) Scale(namespace, name string, newSize uint, preconditions *ScalePrecondition, retry, waitForReplicas *RetryParams) error {
if preconditions == nil {
preconditions = &ScalePrecondition{-1, ""}
}
if retry == nil {
// Make it try only once, immediately
retry = &RetryParams{Interval: time.Millisecond, Timeout: time.Millisecond}
}
cond := ScaleCondition(scaler, preconditions, namespace, name, newSize)
if err := wait.Poll(retry.Interval, retry.Timeout, cond); err != nil {
return err
}
if waitForReplicas != nil {
rc, err := scaler.c.ReplicationControllers(namespace).Get(name)
if err != nil {
return err
}
err = wait.Poll(waitForReplicas.Interval, waitForReplicas.Timeout, client.ControllerHasDesiredReplicas(scaler.c, rc))
if err == wait.ErrWaitTimeout {
return fmt.Errorf("timed out waiting for %q to be synced", name)
}
return err
}
return nil
}
// Scale updates a replication controller created by the DeploymentConfig with the provided namespace/name,
// to a new size, with optional precondition check (if preconditions is not nil),optional retries (if retry
// is not nil), and then optionally waits for it's replica count to reach the new value (if wait is not nil).
func (scaler *DeploymentConfigScaler) Scale(namespace, name string, newSize uint, preconditions *kubectl.ScalePrecondition, retry, waitForReplicas *kubectl.RetryParams) error {
if preconditions == nil {
preconditions = &kubectl.ScalePrecondition{Size: -1, ResourceVersion: ""}
}
if retry == nil {
// Make it try only once, immediately
retry = &kubectl.RetryParams{Interval: time.Millisecond, Timeout: time.Millisecond}
}
cond := kubectl.ScaleCondition(scaler, preconditions, namespace, name, newSize)
if err := wait.Poll(retry.Interval, retry.Timeout, cond); err != nil {
if scaleErr := err.(kubectl.ControllerScaleError); kerrors.IsNotFound(scaleErr.ActualError) {
glog.Infof("No deployment found for dc/%s. Scaling the deployment configuration template...", name)
dc, err := scaler.dcClient.DeploymentConfigs(namespace).Get(name)
if err != nil {
return err
}
dc.Template.ControllerTemplate.Replicas = int(newSize)
if _, err := scaler.dcClient.DeploymentConfigs(namespace).Update(dc); err != nil {
return err
}
return nil
}
return err
}
if waitForReplicas != nil {
rc, err := scaler.rcClient.ReplicationControllers(namespace).Get(name)
if err != nil {
return err
}
return wait.Poll(waitForReplicas.Interval, waitForReplicas.Timeout, kclient.ControllerHasDesiredReplicas(scaler.clientInterface, rc))
}
return nil
}
func scaled(c unversioned.Interface, rc *api.ReplicationController, settleDuration time.Duration) wait.ConditionFunc {
rcReady := unversioned.ControllerHasDesiredReplicas(c, rc)
rcPodsReady := desiredPodsAreReady(c, rc, settleDuration)
return func() (done bool, err error) {
if ok, err := rcReady(); err != nil || !ok {
return ok, err
}
if ok, err := rcPodsReady(); err != nil || !ok {
return ok, err
}
return true, nil
}
}
func runReplicationControllerTest(c *client.Client) {
t := time.Now()
clientAPIVersion := c.APIVersion().String()
data, err := ioutil.ReadFile("cmd/integration/" + clientAPIVersion + "-controller.json")
if err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
glog.Infof("Done reading config file, took %v", time.Since(t))
t = time.Now()
var controller api.ReplicationController
if err := runtime.DecodeInto(testapi.Default.Codec(), data, &controller); err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
glog.Infof("Creating replication controllers")
updated, err := c.ReplicationControllers("test").Create(&controller)
if err != nil {
glog.Fatalf("Unexpected error: %v", err)
}
glog.Infof("Done creating replication controllers, took %v", time.Since(t))
t = time.Now()
// In practice the controller doesn't need 60s to create a handful of pods, but network latencies on CI
// systems have been observed to vary unpredictably, so give the controller enough time to create pods.
// Our e2e scalability tests will catch controllers that are *actually* slow.
if err := wait.Poll(time.Second, longTestTimeout, client.ControllerHasDesiredReplicas(c, updated)); err != nil {
glog.Fatalf("FAILED: pods never created %v", err)
}
glog.Infof("Done creating replicas, took %v", time.Since(t))
t = time.Now()
// Poll till we can retrieve the status of all pods matching the given label selector from their nodes.
// This involves 3 operations:
// - The scheduler must assign all pods to a node
// - The assignment must reflect in a `List` operation against the apiserver, for labels matching the selector
// - We need to be able to query the kubelet on that node for information about the pod
if err := wait.Poll(
time.Second, longTestTimeout, podsOnNodes(c, "test", labels.Set(updated.Spec.Selector).AsSelector())); err != nil {
glog.Fatalf("FAILED: pods never started running %v", err)
}
glog.Infof("Pods verified on nodes, took %v", time.Since(t))
}
// cleanupWithClients performs cleanup tasks after the rolling update. Update
// process related annotations are removed from oldRc and newRc. The
// CleanupPolicy on config is executed.
func (r *RollingUpdater) cleanupWithClients(oldRc, newRc *api.ReplicationController, config *RollingUpdaterConfig) error {
// Clean up annotations
var err error
newRc, err = r.c.ReplicationControllers(r.ns).Get(newRc.Name)
if err != nil {
return err
}
applyUpdate := func(rc *api.ReplicationController) {
delete(rc.Annotations, sourceIdAnnotation)
delete(rc.Annotations, desiredReplicasAnnotation)
}
if newRc, err = updateRcWithRetries(r.c, r.ns, newRc, applyUpdate); err != nil {
return err
}
if err = wait.Poll(config.Interval, config.Timeout, client.ControllerHasDesiredReplicas(r.c, newRc)); err != nil {
return err
}
newRc, err = r.c.ReplicationControllers(r.ns).Get(newRc.Name)
if err != nil {
return err
}
switch config.CleanupPolicy {
case DeleteRollingUpdateCleanupPolicy:
// delete old rc
fmt.Fprintf(config.Out, "Update succeeded. Deleting %s\n", oldRc.Name)
return r.c.ReplicationControllers(r.ns).Delete(oldRc.Name)
case RenameRollingUpdateCleanupPolicy:
// delete old rc
fmt.Fprintf(config.Out, "Update succeeded. Deleting old controller: %s\n", oldRc.Name)
if err := r.c.ReplicationControllers(r.ns).Delete(oldRc.Name); err != nil {
return err
}
fmt.Fprintf(config.Out, "Renaming %s to %s\n", newRc.Name, oldRc.Name)
return Rename(r.c, newRc, oldRc.Name)
case PreserveRollingUpdateCleanupPolicy:
return nil
default:
return nil
}
}
func (c *realScalerClient) ControllerHasDesiredReplicas(rc *api.ReplicationController) wait.ConditionFunc {
return client.ControllerHasDesiredReplicas(c.client, rc)
}
