func checkExistingRCRecovers(f *framework.Framework) {
By("assert that the pre-existing replication controller recovers")
podClient := f.ClientSet.Core().Pods(f.Namespace.Name)
rcSelector := labels.Set{"name": "baz"}.AsSelector()
By("deleting pods from existing replication controller")
framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
options := v1.ListOptions{LabelSelector: rcSelector.String()}
pods, err := podClient.List(options)
if err != nil {
framework.Logf("apiserver returned error, as expected before recovery: %v", err)
return false, nil
}
if len(pods.Items) == 0 {
return false, nil
}
for _, pod := range pods.Items {
err = podClient.Delete(pod.Name, v1.NewDeleteOptions(0))
Expect(err).NotTo(HaveOccurred())
}
framework.Logf("apiserver has recovered")
return true, nil
}))
By("waiting for replication controller to recover")
framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
options := v1.ListOptions{LabelSelector: rcSelector.String()}
pods, err := podClient.List(options)
Expect(err).NotTo(HaveOccurred())
for _, pod := range pods.Items {
if pod.DeletionTimestamp == nil && v1.IsPodReady(&pod) {
return true, nil
}
}
return false, nil
}))
}
var _ = Describe("DNS", func() {
f := NewDefaultFramework("dns")
It("should provide DNS for the cluster", func() {
// TODO: support DNS on vagrant #3580
SkipIfProviderIs("vagrant")
systemClient := f.Client.Pods(api.NamespaceSystem)
By("Waiting for DNS Service to be Running")
options := api.ListOptions{LabelSelector: dnsServiceLabelSelector}
dnsPods, err := systemClient.List(options)
if err != nil {
Failf("Failed to list all dns service pods")
}
if len(dnsPods.Items) != 1 {
Failf("Unexpected number of pods (%d) matches the label selector %v", len(dnsPods.Items), dnsServiceLabelSelector.String())
}
expectNoError(waitForPodRunningInNamespace(f.Client, dnsPods.Items[0].Name, api.NamespaceSystem))
// All the names we need to be able to resolve.
// TODO: Spin up a separate test service and test that dns works for that service.
namesToResolve := []string{
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster.local",
"google.com",
}
// Added due to #8512. This is critical for GCE and GKE deployments.
if providerIs("gce", "gke") {
namesToResolve = append(namesToResolve, "metadata")
}
func verifyExpectedRcsExistAndGetExpectedPods(c clientset.Interface) ([]string, error) {
expectedPods := []string{}
// Iterate over the labels that identify the replication controllers that we
// want to check. The rcLabels contains the value values for the k8s-app key
// that identify the replication controllers that we want to check. Using a label
// rather than an explicit name is preferred because the names will typically have
// a version suffix e.g. heapster-monitoring-v1 and this will change after a rolling
// update e.g. to heapster-monitoring-v2. By using a label query we can check for the
// situation when a heapster-monitoring-v1 and heapster-monitoring-v2 replication controller
// is running (which would be an error except during a rolling update).
for _, rcLabel := range rcLabels {
selector := labels.Set{"k8s-app": rcLabel}.AsSelector()
options := v1.ListOptions{LabelSelector: selector.String()}
deploymentList, err := c.Extensions().Deployments(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
rcList, err := c.Core().ReplicationControllers(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
psList, err := c.Apps().StatefulSets(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
if (len(rcList.Items) + len(deploymentList.Items) + len(psList.Items)) != 1 {
return nil, fmt.Errorf("expected to find one replica for RC or deployment with label %s but got %d",
rcLabel, len(rcList.Items))
}
// Check all the replication controllers.
for _, rc := range rcList.Items {
selector := labels.Set(rc.Spec.Selector).AsSelector()
options := v1.ListOptions{LabelSelector: selector.String()}
podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
for _, pod := range podList.Items {
if pod.DeletionTimestamp != nil {
continue
}
expectedPods = append(expectedPods, string(pod.UID))
}
}
// Do the same for all deployments.
for _, rc := range deploymentList.Items {
selector := labels.Set(rc.Spec.Selector.MatchLabels).AsSelector()
options := v1.ListOptions{LabelSelector: selector.String()}
podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
for _, pod := range podList.Items {
if pod.DeletionTimestamp != nil {
continue
}
expectedPods = append(expectedPods, string(pod.UID))
}
}
// And for pet sets.
for _, ps := range psList.Items {
selector := labels.Set(ps.Spec.Selector.MatchLabels).AsSelector()
options := v1.ListOptions{LabelSelector: selector.String()}
podList, err := c.Core().Pods(api.NamespaceSystem).List(options)
if err != nil {
return nil, err
}
for _, pod := range podList.Items {
if pod.DeletionTimestamp != nil {
continue
}
expectedPods = append(expectedPods, string(pod.UID))
}
}
}
return expectedPods, nil
}
