Add eviction e2e tests.

Also refactor the test a bit.

pkg/client/clientset_generated/release_1_4/typed/core/v1/fake/fake_pod_expansion.go

@@ -18,6 +18,7 @@ package fake
 
 import (
 	"k8s.io/kubernetes/pkg/api/v1"
+	policy "k8s.io/kubernetes/pkg/apis/policy/v1alpha1"
 	"k8s.io/kubernetes/pkg/client/restclient"
 	"k8s.io/kubernetes/pkg/client/testing/core"
 )
@@ -44,3 +45,14 @@ func (c *FakePods) GetLogs(name string, opts *v1.PodLogOptions) *restclient.Requ
 	_, _ = c.Fake.Invokes(action, &v1.Pod{})
 	return &restclient.Request{}
 }
+
+func (c *FakePods) Evict(eviction *policy.Eviction) error {
+	action := core.CreateActionImpl{}
+	action.Verb = "create"
+	action.Resource = podsResource
+	action.Subresource = "evictions"
+	action.Object = eviction
+
+	_, err := c.Fake.Invokes(action, eviction)
+	return err
+}

pkg/client/clientset_generated/release_1_4/typed/core/v1/pod_expansion.go

@@ -19,12 +19,14 @@ package v1
 import (
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/v1"
+	policy "k8s.io/kubernetes/pkg/apis/policy/v1alpha1"
 	"k8s.io/kubernetes/pkg/client/restclient"
 )
 
 // The PodExpansion interface allows manually adding extra methods to the PodInterface.
 type PodExpansion interface {
 	Bind(binding *v1.Binding) error
+	Evict(eviction *policy.Eviction) error
 	GetLogs(name string, opts *v1.PodLogOptions) *restclient.Request
 }
 
@@ -33,6 +35,10 @@ func (c *pods) Bind(binding *v1.Binding) error {
 	return c.client.Post().Namespace(c.ns).Resource("pods").Name(binding.Name).SubResource("binding").Body(binding).Do().Error()
 }
 
+func (c *pods) Evict(eviction *policy.Eviction) error {
+	return c.client.Post().Namespace(c.ns).Resource("pods").Name(eviction.Name).SubResource("eviction").Body(eviction).Do().Error()
+}
+
 // Get constructs a request for getting the logs for a pod
 func (c *pods) GetLogs(name string, opts *v1.PodLogOptions) *restclient.Request {
 	return c.client.Get().Namespace(c.ns).Name(name).Resource("pods").SubResource("log").VersionedParams(opts, api.ParameterCodec)

test/e2e/disruption.go

@@ -31,7 +31,7 @@ import (
 	"k8s.io/kubernetes/test/e2e/framework"
 )
 
-var _ = framework.KubeDescribe("DisruptionController [Feature:PodDisruptionbudget]", func() {
+var _ = framework.KubeDescribe("DisruptionController", func() {
 	f := framework.NewDefaultFramework("disruption")
 	var ns string
 	var cs *release_1_4.Clientset
@@ -42,55 +42,17 @@ var _ = framework.KubeDescribe("DisruptionController [Feature:PodDisruptionbudge
 	})
 
 	It("should create a PodDisruptionBudget", func() {
-		pdb := policy.PodDisruptionBudget{
-			ObjectMeta: api.ObjectMeta{
-				Name:      "foo",
-				Namespace: ns,
-			},
-			Spec: policy.PodDisruptionBudgetSpec{
-				Selector:     &unversioned.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
-				MinAvailable: intstr.FromString("1%"),
-			},
-		}
-		_, err := cs.Policy().PodDisruptionBudgets(ns).Create(&pdb)
-		Expect(err).NotTo(HaveOccurred())
+		createPodDisruptionBudgetOrDie(cs, ns, intstr.FromString("1%"))
 	})
 
 	It("should update PodDisruptionBudget status", func() {
-		pdb := policy.PodDisruptionBudget{
-			ObjectMeta: api.ObjectMeta{
-				Name:      "foo",
-				Namespace: ns,
-			},
-			Spec: policy.PodDisruptionBudgetSpec{
-				Selector:     &unversioned.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
-				MinAvailable: intstr.FromInt(2),
-			},
-		}
-		_, err := cs.Policy().PodDisruptionBudgets(ns).Create(&pdb)
-		Expect(err).NotTo(HaveOccurred())
-		for i := 0; i < 2; i++ {
-			pod := &api.Pod{
-				ObjectMeta: api.ObjectMeta{
-					Name:      fmt.Sprintf("pod-%d", i),
-					Namespace: ns,
-					Labels:    map[string]string{"foo": "bar"},
-				},
-				Spec: api.PodSpec{
-					Containers: []api.Container{
-						{
-							Name:  "busybox",
-							Image: "gcr.io/google_containers/echoserver:1.4",
-						},
-					},
-					RestartPolicy: api.RestartPolicyAlways,
-				},
-			}
+		createPodDisruptionBudgetOrDie(cs, ns, intstr.FromInt(2))
 
-			_, err := cs.Pods(ns).Create(pod)
-			framework.ExpectNoError(err, "Creating pod %q in namespace %q", pod.Name, ns)
-		}
-		err = wait.PollImmediate(framework.Poll, 60*time.Second, func() (bool, error) {
+		createPodsOrDie(cs, ns, 2)
+
+		// Since disruptionAllowed starts out false, if we see it ever become true,
+		// that means the controller is working.
+		err := wait.PollImmediate(framework.Poll, 60*time.Second, func() (bool, error) {
 			pdb, err := cs.Policy().PodDisruptionBudgets(ns).Get("foo")
 			if err != nil {
 				return false, err
@@ -101,4 +63,110 @@ var _ = framework.KubeDescribe("DisruptionController [Feature:PodDisruptionbudge
 
 	})
 
+	It("should allow an eviction when there is no PDB", func() {
+		createPodsOrDie(cs, ns, 1)
+
+		pod, err := cs.Pods(ns).Get("pod-0")
+		Expect(err).NotTo(HaveOccurred())
+
+		e := &policy.Eviction{
+			ObjectMeta: api.ObjectMeta{
+				Name:      pod.Name,
+				Namespace: ns,
+			},
+		}
+
+		err = cs.Pods(ns).Evict(e)
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	It("should not allow an eviction when too few pods", func() {
+		createPodDisruptionBudgetOrDie(cs, ns, intstr.FromInt(2))
+
+		createPodsOrDie(cs, ns, 1)
+
+		pod, err := cs.Pods(ns).Get("pod-0")
+		Expect(err).NotTo(HaveOccurred())
+
+		e := &policy.Eviction{
+			ObjectMeta: api.ObjectMeta{
+				Name:      pod.Name,
+				Namespace: ns,
+			},
+		}
+
+		// Since disruptionAllowed starts out false, wait at least 60s hoping that
+		// this gives the controller enough time to have truly set the status.
+		time.Sleep(60 * time.Second)
+
+		err = cs.Pods(ns).Evict(e)
+		Expect(err).Should(MatchError("Cannot evict pod as it would violate the pod's disruption budget."))
+	})
+
+	It("should allow an eviction when enough pods", func() {
+		createPodDisruptionBudgetOrDie(cs, ns, intstr.FromInt(2))
+
+		createPodsOrDie(cs, ns, 2)
+
+		pod, err := cs.Pods(ns).Get("pod-0")
+		Expect(err).NotTo(HaveOccurred())
+
+		e := &policy.Eviction{
+			ObjectMeta: api.ObjectMeta{
+				Name:      pod.Name,
+				Namespace: ns,
+			},
+		}
+
+		// Since disruptionAllowed starts out false, if an eviction is ever allowed,
+		// that means the controller is working.
+		err = wait.PollImmediate(framework.Poll, 60*time.Second, func() (bool, error) {
+			err = cs.Pods(ns).Evict(e)
+			if err != nil {
+				return false, nil
+			} else {
+				return true, nil
+			}
+		})
+		Expect(err).NotTo(HaveOccurred())
+	})
 })
+
+func createPodDisruptionBudgetOrDie(cs *release_1_4.Clientset, ns string, minAvailable intstr.IntOrString) {
+	pdb := policy.PodDisruptionBudget{
+		ObjectMeta: api.ObjectMeta{
+			Name:      "foo",
+			Namespace: ns,
+		},
+		Spec: policy.PodDisruptionBudgetSpec{
+			Selector:     &unversioned.LabelSelector{MatchLabels: map[string]string{"foo": "bar"}},
+			MinAvailable: minAvailable,
+		},
+	}
+	_, err := cs.Policy().PodDisruptionBudgets(ns).Create(&pdb)
+	Expect(err).NotTo(HaveOccurred())
+}
+
+func createPodsOrDie(cs *release_1_4.Clientset, ns string, n int) {
+	for i := 0; i < n; i++ {
+		pod := &api.Pod{
+			ObjectMeta: api.ObjectMeta{
+				Name:      fmt.Sprintf("pod-%d", i),
+				Namespace: ns,
+				Labels:    map[string]string{"foo": "bar"},
+			},
+			Spec: api.PodSpec{
+				Containers: []api.Container{
+					{
+						Name:  "busybox",
+						Image: "gcr.io/google_containers/echoserver:1.4",
+					},
+				},
+				RestartPolicy: api.RestartPolicyAlways,
+			},
+		}
+
+		_, err := cs.Pods(ns).Create(pod)
+		framework.ExpectNoError(err, "Creating pod %q in namespace %q", pod.Name, ns)
+	}
+}