vendor files

vendor/k8s.io/kubernetes/test/e2e/apps/rc.go

@@ -0,0 +1,328 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package apps
+
+import (
+	"fmt"
+	"time"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/uuid"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/kubernetes/pkg/controller/replication"
+	"k8s.io/kubernetes/test/e2e/framework"
+	imageutils "k8s.io/kubernetes/test/utils/image"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = SIGDescribe("ReplicationController", func() {
+	f := framework.NewDefaultFramework("replication-controller")
+
+	framework.ConformanceIt("should serve a basic image on each replica with a public image ", func() {
+		TestReplicationControllerServeImageOrFail(f, "basic", framework.ServeHostnameImage)
+	})
+
+	It("should serve a basic image on each replica with a private image", func() {
+		// requires private images
+		framework.SkipUnlessProviderIs("gce", "gke")
+		privateimage := imageutils.ServeHostname
+		privateimage.SetRegistry(imageutils.PrivateRegistry)
+		TestReplicationControllerServeImageOrFail(f, "private", imageutils.GetE2EImage(privateimage))
+	})
+
+	It("should surface a failure condition on a common issue like exceeded quota", func() {
+		testReplicationControllerConditionCheck(f)
+	})
+
+	It("should adopt matching pods on creation", func() {
+		testRCAdoptMatchingOrphans(f)
+	})
+
+	It("should release no longer matching pods", func() {
+		testRCReleaseControlledNotMatching(f)
+	})
+})
+
+func newRC(rsName string, replicas int32, rcPodLabels map[string]string, imageName string, image string) *v1.ReplicationController {
+	zero := int64(0)
+	return &v1.ReplicationController{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: rsName,
+		},
+		Spec: v1.ReplicationControllerSpec{
+			Replicas: func(i int32) *int32 { return &i }(replicas),
+			Template: &v1.PodTemplateSpec{
+				ObjectMeta: metav1.ObjectMeta{
+					Labels: rcPodLabels,
+				},
+				Spec: v1.PodSpec{
+					TerminationGracePeriodSeconds: &zero,
+					Containers: []v1.Container{
+						{
+							Name:  imageName,
+							Image: image,
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// A basic test to check the deployment of an image using
+// a replication controller. The image serves its hostname
+// which is checked for each replica.
+func TestReplicationControllerServeImageOrFail(f *framework.Framework, test string, image string) {
+	name := "my-hostname-" + test + "-" + string(uuid.NewUUID())
+	replicas := int32(1)
+
+	// Create a replication controller for a service
+	// that serves its hostname.
+	// The source for the Docker containter kubernetes/serve_hostname is
+	// in contrib/for-demos/serve_hostname
+	By(fmt.Sprintf("Creating replication controller %s", name))
+	newRC := newRC(name, replicas, map[string]string{"name": name}, name, image)
+	newRC.Spec.Template.Spec.Containers[0].Ports = []v1.ContainerPort{{ContainerPort: 9376}}
+	_, err := f.ClientSet.CoreV1().ReplicationControllers(f.Namespace.Name).Create(newRC)
+	Expect(err).NotTo(HaveOccurred())
+
+	// Check that pods for the new RC were created.
+	// TODO: Maybe switch PodsCreated to just check owner references.
+	pods, err := framework.PodsCreated(f.ClientSet, f.Namespace.Name, name, replicas)
+	Expect(err).NotTo(HaveOccurred())
+
+	// Wait for the pods to enter the running state. Waiting loops until the pods
+	// are running so non-running pods cause a timeout for this test.
+	framework.Logf("Ensuring all pods for ReplicationController %q are running", name)
+	running := int32(0)
+	for _, pod := range pods.Items {
+		if pod.DeletionTimestamp != nil {
+			continue
+		}
+		err = f.WaitForPodRunning(pod.Name)
+		if err != nil {
+			updatePod, getErr := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(pod.Name, metav1.GetOptions{})
+			if getErr == nil {
+				err = fmt.Errorf("Pod %q never run (phase: %s, conditions: %+v): %v", updatePod.Name, updatePod.Status.Phase, updatePod.Status.Conditions, err)
+			} else {
+				err = fmt.Errorf("Pod %q never run: %v", pod.Name, err)
+			}
+		}
+		Expect(err).NotTo(HaveOccurred())
+		framework.Logf("Pod %q is running (conditions: %+v)", pod.Name, pod.Status.Conditions)
+		running++
+	}
+
+	// Sanity check
+	if running != replicas {
+		Expect(fmt.Errorf("unexpected number of running pods: %+v", pods.Items)).NotTo(HaveOccurred())
+	}
+
+	// Verify that something is listening.
+	framework.Logf("Trying to dial the pod")
+	retryTimeout := 2 * time.Minute
+	retryInterval := 5 * time.Second
+	label := labels.SelectorFromSet(labels.Set(map[string]string{"name": name}))
+	err = wait.Poll(retryInterval, retryTimeout, framework.PodProxyResponseChecker(f.ClientSet, f.Namespace.Name, label, name, true, pods).CheckAllResponses)
+	if err != nil {
+		framework.Failf("Did not get expected responses within the timeout period of %.2f seconds.", retryTimeout.Seconds())
+	}
+}
+
+// 1. Create a quota restricting pods in the current namespace to 2.
+// 2. Create a replication controller that wants to run 3 pods.
+// 3. Check replication controller conditions for a ReplicaFailure condition.
+// 4. Relax quota or scale down the controller and observe the condition is gone.
+func testReplicationControllerConditionCheck(f *framework.Framework) {
+	c := f.ClientSet
+	namespace := f.Namespace.Name
+	name := "condition-test"
+
+	framework.Logf("Creating quota %q that allows only two pods to run in the current namespace", name)
+	quota := newPodQuota(name, "2")
+	_, err := c.CoreV1().ResourceQuotas(namespace).Create(quota)
+	Expect(err).NotTo(HaveOccurred())
+
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		quota, err = c.CoreV1().ResourceQuotas(namespace).Get(name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+		podQuota := quota.Status.Hard[v1.ResourcePods]
+		quantity := resource.MustParse("2")
+		return (&podQuota).Cmp(quantity) == 0, nil
+	})
+	if err == wait.ErrWaitTimeout {
+		err = fmt.Errorf("resource quota %q never synced", name)
+	}
+	Expect(err).NotTo(HaveOccurred())
+
+	By(fmt.Sprintf("Creating rc %q that asks for more than the allowed pod quota", name))
+	rc := newRC(name, 3, map[string]string{"name": name}, NginxImageName, NginxImage)
+	rc, err = c.CoreV1().ReplicationControllers(namespace).Create(rc)
+	Expect(err).NotTo(HaveOccurred())
+
+	By(fmt.Sprintf("Checking rc %q has the desired failure condition set", name))
+	generation := rc.Generation
+	conditions := rc.Status.Conditions
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		rc, err = c.CoreV1().ReplicationControllers(namespace).Get(name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+
+		if generation > rc.Status.ObservedGeneration {
+			return false, nil
+		}
+		conditions = rc.Status.Conditions
+
+		cond := replication.GetCondition(rc.Status, v1.ReplicationControllerReplicaFailure)
+		return cond != nil, nil
+	})
+	if err == wait.ErrWaitTimeout {
+		err = fmt.Errorf("rc manager never added the failure condition for rc %q: %#v", name, conditions)
+	}
+	Expect(err).NotTo(HaveOccurred())
+
+	By(fmt.Sprintf("Scaling down rc %q to satisfy pod quota", name))
+	rc, err = framework.UpdateReplicationControllerWithRetries(c, namespace, name, func(update *v1.ReplicationController) {
+		x := int32(2)
+		update.Spec.Replicas = &x
+	})
+	Expect(err).NotTo(HaveOccurred())
+
+	By(fmt.Sprintf("Checking rc %q has no failure condition set", name))
+	generation = rc.Generation
+	conditions = rc.Status.Conditions
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		rc, err = c.CoreV1().ReplicationControllers(namespace).Get(name, metav1.GetOptions{})
+		if err != nil {
+			return false, err
+		}
+
+		if generation > rc.Status.ObservedGeneration {
+			return false, nil
+		}
+		conditions = rc.Status.Conditions
+
+		cond := replication.GetCondition(rc.Status, v1.ReplicationControllerReplicaFailure)
+		return cond == nil, nil
+	})
+	if err == wait.ErrWaitTimeout {
+		err = fmt.Errorf("rc manager never removed the failure condition for rc %q: %#v", name, conditions)
+	}
+	Expect(err).NotTo(HaveOccurred())
+}
+
+func testRCAdoptMatchingOrphans(f *framework.Framework) {
+	name := "pod-adoption"
+	By(fmt.Sprintf("Given a Pod with a 'name' label %s is created", name))
+	p := f.PodClient().CreateSync(&v1.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: name,
+			Labels: map[string]string{
+				"name": name,
+			},
+		},
+		Spec: v1.PodSpec{
+			Containers: []v1.Container{
+				{
+					Name:  name,
+					Image: NginxImageName,
+				},
+			},
+		},
+	})
+
+	By("When a replication controller with a matching selector is created")
+	replicas := int32(1)
+	rcSt := newRC(name, replicas, map[string]string{"name": name}, name, NginxImageName)
+	rcSt.Spec.Selector = map[string]string{"name": name}
+	rc, err := f.ClientSet.CoreV1().ReplicationControllers(f.Namespace.Name).Create(rcSt)
+	Expect(err).NotTo(HaveOccurred())
+
+	By("Then the orphan pod is adopted")
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		p2, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(p.Name, metav1.GetOptions{})
+		// The Pod p should either be adopted or deleted by the RC
+		if errors.IsNotFound(err) {
+			return true, nil
+		}
+		Expect(err).NotTo(HaveOccurred())
+		for _, owner := range p2.OwnerReferences {
+			if *owner.Controller && owner.UID == rc.UID {
+				// pod adopted
+				return true, nil
+			}
+		}
+		// pod still not adopted
+		return false, nil
+	})
+	Expect(err).NotTo(HaveOccurred())
+}
+
+func testRCReleaseControlledNotMatching(f *framework.Framework) {
+	name := "pod-release"
+	By("Given a ReplicationController is created")
+	replicas := int32(1)
+	rcSt := newRC(name, replicas, map[string]string{"name": name}, name, NginxImageName)
+	rcSt.Spec.Selector = map[string]string{"name": name}
+	rc, err := f.ClientSet.CoreV1().ReplicationControllers(f.Namespace.Name).Create(rcSt)
+	Expect(err).NotTo(HaveOccurred())
+
+	By("When the matched label of one of its pods change")
+	pods, err := framework.PodsCreated(f.ClientSet, f.Namespace.Name, rc.Name, replicas)
+	Expect(err).NotTo(HaveOccurred())
+
+	p := pods.Items[0]
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		pod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(p.Name, metav1.GetOptions{})
+		Expect(err).NotTo(HaveOccurred())
+
+		pod.Labels = map[string]string{"name": "not-matching-name"}
+		_, err = f.ClientSet.CoreV1().Pods(f.Namespace.Name).Update(pod)
+		if err != nil && errors.IsConflict(err) {
+			return false, nil
+		}
+		if err != nil {
+			return false, err
+		}
+		return true, nil
+	})
+	Expect(err).NotTo(HaveOccurred())
+
+	By("Then the pod is released")
+	err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
+		p2, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(p.Name, metav1.GetOptions{})
+		Expect(err).NotTo(HaveOccurred())
+		for _, owner := range p2.OwnerReferences {
+			if *owner.Controller && owner.UID == rc.UID {
+				// pod still belonging to the replication controller
+				return false, nil
+			}
+		}
+		// pod already released
+		return true, nil
+	})
+	Expect(err).NotTo(HaveOccurred())
+}