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Merge pull request #27636 from mml/fed-dns-followup

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Automatic merge from submit-queue

Cleanups following #27587

- Add back the negative assertions, but mark them [Slow].
- Use the current DNS TTL of 180 sec as our timeout for all DNS tests.
- Assorted cleanups and refactoring.
This commit is contained in:
k8s-merge-robot 2016-06-17 22:05:39 -07:00 committed by GitHub
commit d1115dc184
1 changed files with 63 additions and 52 deletions
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115
test/e2e/federated-service.go
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@ -50,6 +50,9 @@ const (
FederatedServicePod = "federated-service-test-pod"
DefaultFederationName = "federation"
// We use this to decide how long to wait for our DNS probes to succeed.
DNSTTL = 180 * time.Second
)
var _ = framework.KubeDescribe("[Feature:Federation] Federated Services", func() {
@ -149,7 +152,7 @@ var _ = framework.KubeDescribe("[Feature:Federation] Federated Services", func()
// pods, perhaps in the BeforeEach, and then just poll until we get
// successes/failures from them all.
for _, name := range svcDNSNames {
discoverService(f, name)
discoverService(f, name, true)
}
})
@ -158,6 +161,8 @@ var _ = framework.KubeDescribe("[Feature:Federation] Federated Services", func()
framework.SkipUnlessFederated(f.Client)
// Delete a federated service shard in the default e2e Kubernetes cluster.
// TODO(mml): This should not work: #27623. We should use a load
// balancer with actual back-ends, some of which we delete or disable.
err := f.Clientset_1_3.Core().Services(f.Namespace.Name).Delete(FederatedServiceName, &api.DeleteOptions{})
Expect(err).NotTo(HaveOccurred())
waitForFederatedServiceShard(f.Clientset_1_3, f.Namespace.Name, nil, 0)
@ -171,14 +176,12 @@ var _ = framework.KubeDescribe("[Feature:Federation] Federated Services", func()
fmt.Sprintf("%s.%s.%s.svc.cluster.local.", FederatedServiceName, f.Namespace.Name, federationName),
}
for _, name := range svcDNSNames {
discoverService(f, name)
discoverService(f, name, true)
}
// TODO(mml): Unclear how to make this meaningful and not terribly
// slow. How long (how many minutes?) do we verify that a given DNS
// lookup *doesn't* work before we call it a success? For now,
// commenting out.
/*
// TODO(mml): This currently takes 9 minutes. Consider reducing the
// TTL and/or running the pods in parallel.
Context("[Slow]", func() {
localSvcDNSNames := []string{
FederatedServiceName,
fmt.Sprintf("%s.%s", FederatedServiceName, f.Namespace.Name),
@ -187,7 +190,7 @@ var _ = framework.KubeDescribe("[Feature:Federation] Federated Services", func()
for _, name := range localSvcDNSNames {
discoverService(f, name, false)
}
*/
})
})
})
})
@ -273,10 +276,50 @@ func createService(fcs *federation_release_1_3.Clientset, clusterClientSets []*r
}
}
func discoverService(f *framework.Framework, name string) {
command := []string{"sh", "-c", fmt.Sprintf("until nslookup '%s'; do sleep 1; done", name)}
func podExitCodeDetector(f *framework.Framework, name string, code int32) func() error {
// If we ever get any container logs, stash them here.
logs := ""
defer f.Client.Pods(f.Namespace.Name).Delete(FederatedServicePod, api.NewDeleteOptions(0))
logerr := func(err error) error {
if err == nil {
return nil
}
if logs == "" {
return err
}
return fmt.Errorf("%s (%v)", logs, err)
}
return func() error {
pod, err := f.Client.Pods(f.Namespace.Name).Get(name)
if err != nil {
return logerr(err)
}
if len(pod.Status.ContainerStatuses) < 1 {
return logerr(fmt.Errorf("no container statuses"))
}
// Best effort attempt to grab pod logs for debugging
logs, err = framework.GetPodLogs(f.Client, f.Namespace.Name, name, pod.Spec.Containers[0].Name)
if err != nil {
framework.Logf("Cannot fetch pod logs: %v", err)
}
status := pod.Status.ContainerStatuses[0]
if status.State.Terminated == nil {
return logerr(fmt.Errorf("container is not in terminated state"))
}
if status.State.Terminated.ExitCode == code {
return nil
}
return logerr(fmt.Errorf("exited %d", status.State.Terminated.ExitCode))
}
}
func discoverService(f *framework.Framework, name string, exists bool) {
command := []string{"sh", "-c", fmt.Sprintf("until nslookup '%s'; do sleep 1; done", name)}
By(fmt.Sprintf("Looking up %q", name))
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
@ -296,47 +339,15 @@ func discoverService(f *framework.Framework, name string) {
}
_, err := f.Client.Pods(f.Namespace.Name).Create(pod)
Expect(err).
NotTo(HaveOccurred(), "Trying to create pod to run %q", command)
Expect(err).NotTo(HaveOccurred(), "Trying to create pod to run %q", command)
defer f.Client.Pods(f.Namespace.Name).Delete(FederatedServicePod, api.NewDeleteOptions(0))
// If we ever get any container logs, stash them here.
logs := ""
logerr := func(err error) error {
if err == nil {
return nil
}
if logs == "" {
return err
}
return fmt.Errorf("%s (%v)", logs, err)
if exists {
// TODO(mml): Eventually check the IP address is correct, too.
Eventually(podExitCodeDetector(f, FederatedServicePod, 0), DNSTTL, time.Second*2).
Should(BeNil(), "%q should exit 0, but it never did", command)
} else {
Consistently(podExitCodeDetector(f, FederatedServicePod, 0), DNSTTL, time.Second*2).
ShouldNot(BeNil(), "%q should never exit 0, but it did", command)
}
// TODO(mml): Eventually check the IP address is correct, too.
Eventually(func() error {
pod, err := f.Client.Pods(f.Namespace.Name).Get(FederatedServicePod)
if err != nil {
return logerr(err)
}
if len(pod.Status.ContainerStatuses) < 1 {
return logerr(fmt.Errorf("no container statuses"))
}
// Best effort attempt to grab pod logs for debugging
logs, err = framework.GetPodLogs(f.Client, f.Namespace.Name, FederatedServicePod, "federated-service-discovery-container")
if err != nil {
framework.Logf("Cannot fetch pod logs: %v", err)
}
status := pod.Status.ContainerStatuses[0]
if status.State.Terminated == nil {
return logerr(fmt.Errorf("container is not in terminated state"))
}
if status.State.Terminated.ExitCode == 0 {
return nil
}
return logerr(fmt.Errorf("exited %d", status.State.Terminated.ExitCode))
}, time.Minute*2, time.Second*2).
Should(BeNil(), "%q should exit 0, but it never did", command)
}