ec8972fef3
* Use the VKUBELET API for fetching the pods during testing, which makes it easier to run testing without wiring up an entire cluster * Runningpods does not require each provider to implement the optional stats interface for testing.
365 lines
12 KiB
Go
365 lines
12 KiB
Go
// +build e2e
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package e2e
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import (
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"fmt"
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"testing"
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"time"
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"github.com/virtual-kubelet/virtual-kubelet/vkubelet"
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"gotest.tools/assert"
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"k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/kubernetes/pkg/kubelet/apis/stats/v1alpha1"
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)
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const (
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// deleteGracePeriodForProvider is the maximum amount of time we allow for the provider to react to deletion of a pod
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// before proceeding to assert that the pod has been deleted.
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deleteGracePeriodForProvider = 1 * time.Second
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)
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// TestGetStatsSummary creates a pod having two containers and queries the /stats/summary endpoint of the virtual-kubelet.
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// It expects this endpoint to return stats for the current node, as well as for the aforementioned pod and each of its two containers.
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func TestGetStatsSummary(t *testing.T) {
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// Create a pod with prefix "nginx-" having three containers.
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pod, err := f.CreatePod(f.CreateDummyPodObjectWithPrefix(t.Name(), "nginx-", "foo", "bar", "baz"))
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if err != nil {
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t.Fatal(err)
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}
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// Delete the "nginx-0-X" pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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// Wait for the "nginx-" pod to be reported as running and ready.
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if _, err := f.WaitUntilPodReady(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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// Grab the stats from the provider.
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stats, err := f.GetStatsSummary()
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if err != nil {
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t.Fatal(err)
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}
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// Make sure that we've got stats for the current node.
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if stats.Node.NodeName != f.NodeName {
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t.Fatalf("expected stats for node %s, got stats for node %s", f.NodeName, stats.Node.NodeName)
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}
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// Make sure the "nginx-" pod exists in the slice of PodStats.
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idx, err := findPodInPodStats(stats, pod)
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if err != nil {
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t.Fatal(err)
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}
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// Make sure that we've got stats for all the containers in the "nginx-" pod.
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desiredContainerStatsCount := len(pod.Spec.Containers)
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currentContainerStatsCount := len(stats.Pods[idx].Containers)
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if currentContainerStatsCount != desiredContainerStatsCount {
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t.Fatalf("expected stats for %d containers, got stats for %d containers", desiredContainerStatsCount, currentContainerStatsCount)
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}
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}
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// TestPodLifecycleGracefulDelete creates a pod and verifies that the provider has been asked to create it.
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// Then, it deletes the pods and verifies that the provider has been asked to delete it.
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// These verifications are made using the /stats/summary endpoint of the virtual-kubelet, by checking for the presence or absence of the pods.
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// Hence, the provider being tested must implement the PodMetricsProvider interface.
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func TestPodLifecycleGracefulDelete(t *testing.T) {
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// Create a pod with prefix "nginx-" having a single container.
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podSpec := f.CreateDummyPodObjectWithPrefix(t.Name(), "nginx-", "foo")
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podSpec.Spec.NodeName = nodeName
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pod, err := f.CreatePod(podSpec)
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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t.Logf("Created pod: %s", pod.Name)
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// Wait for the "nginx-" pod to be reported as running and ready.
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if _, err := f.WaitUntilPodReady(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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t.Logf("Pod %s ready", pod.Name)
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of PodStats.
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assert.NilError(t, findPodInPods(pods, pod))
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podCh := make(chan error)
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var podLast *v1.Pod
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go func() {
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// Close the podCh channel, signaling we've observed deletion of the pod.
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defer close(podCh)
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var err error
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podLast, err = f.WaitUntilPodDeleted(pod.Namespace, pod.Name)
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if err != nil {
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// Propagate the error to the outside so we can fail the test.
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podCh <- err
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}
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}()
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// Gracefully delete the "nginx-" pod.
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if err := f.DeletePod(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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t.Logf("Deleted pod: %s", pod.Name)
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// Wait for the delete event to be ACKed.
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if err := <-podCh; err != nil {
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t.Fatal(err)
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}
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time.Sleep(deleteGracePeriodForProvider)
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// Give the provider some time to react to the MODIFIED/DELETED events before proceeding.
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// Grab the pods from the provider.
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pods, err = f.GetRunningPods()
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assert.NilError(t, err)
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// Make sure the pod DOES NOT exist in the provider's set of running pods
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assert.Assert(t, findPodInPods(pods, pod) != nil)
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// Make sure we saw the delete event, and the delete event was graceful
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assert.Assert(t, podLast != nil)
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assert.Assert(t, podLast.ObjectMeta.GetDeletionGracePeriodSeconds() != nil)
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assert.Assert(t, *podLast.ObjectMeta.GetDeletionGracePeriodSeconds() > 0)
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}
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// TestPodLifecycleNonGracefulDelete creates one podsand verifies that the provider has created them
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// and put them in the running lifecycle. It then does a force delete on the pod, and verifies the provider
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// has deleted it.
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func TestPodLifecycleForceDelete(t *testing.T) {
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podSpec := f.CreateDummyPodObjectWithPrefix(t.Name(), "nginx-", "foo")
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// Create a pod with prefix having a single container.
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pod, err := f.CreatePod(podSpec)
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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t.Logf("Created pod: %s", pod.Name)
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// Wait for the "nginx-" pod to be reported as running and ready.
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if _, err := f.WaitUntilPodReady(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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t.Logf("Pod %s ready", pod.Name)
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of Pods.
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assert.NilError(t, findPodInPods(pods, pod))
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// Wait for the pod to be deleted in a separate goroutine.
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// This ensures that we don't possibly miss the MODIFIED/DELETED events due to establishing the watch too late in the process.
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// It also makes sure that in light of soft deletes, we properly handle non-graceful pod deletion
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podCh := make(chan error)
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var podLast *v1.Pod
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go func() {
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// Close the podCh channel, signaling we've observed deletion of the pod.
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defer close(podCh)
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var err error
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// Wait for the pod to be reported as having been deleted.
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podLast, err = f.WaitUntilPodDeleted(pod.Namespace, pod.Name)
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if err != nil {
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// Propagate the error to the outside so we can fail the test.
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podCh <- err
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}
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}()
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time.Sleep(deleteGracePeriodForProvider)
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// Forcibly delete the pod.
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil {
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t.Logf("Last saw pod in state: %+v", podLast)
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t.Fatal(err)
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}
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t.Log("Force deleted pod: ", pod.Name)
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// Wait for the delete event to be ACKed.
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if err := <-podCh; err != nil {
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t.Logf("Last saw pod in state: %+v", podLast)
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t.Fatal(err)
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}
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// Give the provider some time to react to the MODIFIED/DELETED events before proceeding.
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time.Sleep(deleteGracePeriodForProvider)
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// Grab the pods from the provider.
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pods, err = f.GetRunningPods()
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assert.NilError(t, err)
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// Make sure the "nginx-" pod DOES NOT exist in the slice of Pods anymore.
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assert.Assert(t, findPodInPods(pods, pod) != nil)
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t.Logf("Pod ended as phase: %+v", podLast.Status.Phase)
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}
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// TestCreatePodWithOptionalInexistentSecrets tries to create a pod referencing optional, inexistent secrets.
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// It then verifies that the pod is created successfully.
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func TestCreatePodWithOptionalInexistentSecrets(t *testing.T) {
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// Create a pod with a single container referencing optional, inexistent secrets.
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pod, err := f.CreatePod(f.CreatePodObjectWithOptionalSecretKey(t.Name()))
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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// Wait for the pod to be reported as running and ready.
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if _, err := f.WaitUntilPodReady(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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// Wait for an event concerning the missing secret to be reported on the pod.
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if err := f.WaitUntilPodEventWithReason(pod, vkubelet.ReasonOptionalSecretNotFound); err != nil {
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t.Fatal(err)
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}
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of Pods.
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assert.NilError(t, findPodInPods(pods, pod))
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}
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// TestCreatePodWithMandatoryInexistentSecrets tries to create a pod referencing inexistent secrets.
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// It then verifies that the pod is not created.
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func TestCreatePodWithMandatoryInexistentSecrets(t *testing.T) {
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// Create a pod with a single container referencing inexistent secrets.
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pod, err := f.CreatePod(f.CreatePodObjectWithMandatorySecretKey(t.Name()))
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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// Wait for an event concerning the missing secret to be reported on the pod.
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if err := f.WaitUntilPodEventWithReason(pod, vkubelet.ReasonMandatorySecretNotFound); err != nil {
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t.Fatal(err)
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}
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of PodStats.
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assert.Assert(t, findPodInPods(pods, pod) != nil)
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}
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// TestCreatePodWithOptionalInexistentConfigMap tries to create a pod referencing optional, inexistent config map.
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// It then verifies that the pod is created successfully.
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func TestCreatePodWithOptionalInexistentConfigMap(t *testing.T) {
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// Create a pod with a single container referencing optional, inexistent config map.
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pod, err := f.CreatePod(f.CreatePodObjectWithOptionalConfigMapKey(t.Name()))
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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// Wait for the pod to be reported as running and ready.
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if _, err := f.WaitUntilPodReady(pod.Namespace, pod.Name); err != nil {
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t.Fatal(err)
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}
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// Wait for an event concerning the missing config map to be reported on the pod.
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if err := f.WaitUntilPodEventWithReason(pod, vkubelet.ReasonOptionalConfigMapNotFound); err != nil {
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t.Fatal(err)
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}
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of PodStats.
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assert.NilError(t, findPodInPods(pods, pod))
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}
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// TestCreatePodWithMandatoryInexistentConfigMap tries to create a pod referencing inexistent secrets.
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// It then verifies that the pod is not created.
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func TestCreatePodWithMandatoryInexistentConfigMap(t *testing.T) {
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// Create a pod with a single container referencing inexistent config map.
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pod, err := f.CreatePod(f.CreatePodObjectWithMandatoryConfigMapKey(t.Name()))
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if err != nil {
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t.Fatal(err)
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}
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// Delete the pod after the test finishes.
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defer func() {
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if err := f.DeletePodImmediately(pod.Namespace, pod.Name); err != nil && !apierrors.IsNotFound(err) {
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t.Error(err)
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}
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}()
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// Wait for an event concerning the missing config map to be reported on the pod.
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if err := f.WaitUntilPodEventWithReason(pod, vkubelet.ReasonMandatoryConfigMapNotFound); err != nil {
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t.Fatal(err)
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}
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// Grab the pods from the provider.
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pods, err := f.GetRunningPods()
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assert.NilError(t, err)
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// Check if the pod exists in the slice of PodStats.
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assert.Assert(t, findPodInPods(pods, pod) != nil)
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}
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// findPodInPodStats returns the index of the specified pod in the .pods field of the specified Summary object.
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// It returns an error if the specified pod is not found.
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func findPodInPodStats(summary *v1alpha1.Summary, pod *v1.Pod) (int, error) {
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for i, p := range summary.Pods {
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if p.PodRef.Namespace == pod.Namespace && p.PodRef.Name == pod.Name && string(p.PodRef.UID) == string(pod.UID) {
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return i, nil
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}
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}
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return -1, fmt.Errorf("failed to find pod \"%s/%s\" in the slice of pod stats", pod.Namespace, pod.Name)
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}
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// findPodInPodStats returns the index of the specified pod in the .pods field of the specified PodList object.
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// It returns error if the pod doesn't exist in the podlist
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func findPodInPods(pods *v1.PodList, pod *v1.Pod) error {
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for _, p := range pods.Items {
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if p.Namespace == pod.Namespace && p.Name == pod.Name && string(p.UID) == string(pod.UID) {
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return nil
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}
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}
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return fmt.Errorf("failed to find pod \"%s/%s\" in the slice of pod list", pod.Namespace, pod.Name)
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}
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