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pods.go
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pods.go
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/*
Copyright 2014 The Kubernetes Authors All rights reserved.
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 e2e
import (
"bytes"
"fmt"
"io"
"strconv"
"strings"
"time"
"golang.org/x/net/websocket"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
"k8s.io/kubernetes/pkg/api/resource"
client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/kubelet"
"k8s.io/kubernetes/pkg/labels"
"k8s.io/kubernetes/pkg/util"
"k8s.io/kubernetes/pkg/util/intstr"
"k8s.io/kubernetes/pkg/util/wait"
"k8s.io/kubernetes/pkg/watch"
"k8s.io/kubernetes/test/e2e/framework"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
const (
defaultObservationTimeout = time.Minute * 2
)
var (
buildBackOffDuration = time.Minute
syncLoopFrequency = 10 * time.Second
maxBackOffTolerance = time.Duration(1.3 * float64(kubelet.MaxContainerBackOff))
)
func runLivenessTest(c *client.Client, ns string, podDescr *api.Pod, expectNumRestarts int, timeout time.Duration) {
By(fmt.Sprintf("Creating pod %s in namespace %s", podDescr.Name, ns))
_, err := c.Pods(ns).Create(podDescr)
framework.ExpectNoError(err, fmt.Sprintf("creating pod %s", podDescr.Name))
// At the end of the test, clean up by removing the pod.
defer func() {
By("deleting the pod")
c.Pods(ns).Delete(podDescr.Name, api.NewDeleteOptions(0))
}()
// Wait until the pod is not pending. (Here we need to check for something other than
// 'Pending' other than checking for 'Running', since when failures occur, we go to
// 'Terminated' which can cause indefinite blocking.)
framework.ExpectNoError(framework.WaitForPodNotPending(c, ns, podDescr.Name),
fmt.Sprintf("starting pod %s in namespace %s", podDescr.Name, ns))
framework.Logf("Started pod %s in namespace %s", podDescr.Name, ns)
// Check the pod's current state and verify that restartCount is present.
By("checking the pod's current state and verifying that restartCount is present")
pod, err := c.Pods(ns).Get(podDescr.Name)
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s in namespace %s", podDescr.Name, ns))
initialRestartCount := api.GetExistingContainerStatus(pod.Status.ContainerStatuses, "liveness").RestartCount
framework.Logf("Initial restart count of pod %s is %d", podDescr.Name, initialRestartCount)
// Wait for the restart state to be as desired.
deadline := time.Now().Add(timeout)
lastRestartCount := initialRestartCount
observedRestarts := int32(0)
for start := time.Now(); time.Now().Before(deadline); time.Sleep(2 * time.Second) {
pod, err = c.Pods(ns).Get(podDescr.Name)
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s", podDescr.Name))
restartCount := api.GetExistingContainerStatus(pod.Status.ContainerStatuses, "liveness").RestartCount
if restartCount != lastRestartCount {
framework.Logf("Restart count of pod %s/%s is now %d (%v elapsed)",
ns, podDescr.Name, restartCount, time.Since(start))
if restartCount < lastRestartCount {
framework.Failf("Restart count should increment monotonically: restart cont of pod %s/%s changed from %d to %d",
ns, podDescr.Name, lastRestartCount, restartCount)
}
}
observedRestarts = restartCount - initialRestartCount
if expectNumRestarts > 0 && int(observedRestarts) >= expectNumRestarts {
// Stop if we have observed more than expectNumRestarts restarts.
break
}
lastRestartCount = restartCount
}
// If we expected 0 restarts, fail if observed any restart.
// If we expected n restarts (n > 0), fail if we observed < n restarts.
if (expectNumRestarts == 0 && observedRestarts > 0) || (expectNumRestarts > 0 &&
int(observedRestarts) < expectNumRestarts) {
framework.Failf("pod %s/%s - expected number of restarts: %t, found restarts: %t",
ns, podDescr.Name, expectNumRestarts, observedRestarts)
}
}
// testHostIP tests that a pod gets a host IP
func testHostIP(c *client.Client, ns string, pod *api.Pod) {
podClient := c.Pods(ns)
By("creating pod")
defer podClient.Delete(pod.Name, api.NewDeleteOptions(0))
if _, err := podClient.Create(pod); err != nil {
framework.Failf("Failed to create pod: %v", err)
}
By("ensuring that pod is running and has a hostIP")
// 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.
err := framework.WaitForPodRunningInNamespace(c, pod.Name, ns)
Expect(err).NotTo(HaveOccurred())
// Try to make sure we get a hostIP for each pod.
hostIPTimeout := 2 * time.Minute
t := time.Now()
for {
p, err := podClient.Get(pod.Name)
Expect(err).NotTo(HaveOccurred())
if p.Status.HostIP != "" {
framework.Logf("Pod %s has hostIP: %s", p.Name, p.Status.HostIP)
break
}
if time.Since(t) >= hostIPTimeout {
framework.Failf("Gave up waiting for hostIP of pod %s after %v seconds",
p.Name, time.Since(t).Seconds())
}
framework.Logf("Retrying to get the hostIP of pod %s", p.Name)
time.Sleep(5 * time.Second)
}
}
func runPodFromStruct(f *framework.Framework, pod *api.Pod) {
By("submitting the pod to kubernetes")
podClient := f.Client.Pods(f.Namespace.Name)
pod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Failed to create pod: %v", err)
}
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
By("verifying the pod is in kubernetes")
pod, err = podClient.Get(pod.Name)
if err != nil {
framework.Failf("failed to get pod: %v", err)
}
}
func startPodAndGetBackOffs(f *framework.Framework, pod *api.Pod, podName string, containerName string, sleepAmount time.Duration) (time.Duration, time.Duration) {
runPodFromStruct(f, pod)
time.Sleep(sleepAmount)
By("getting restart delay-0")
_, err := getRestartDelay(f.Client, pod, f.Namespace.Name, podName, containerName)
if err != nil {
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
}
By("getting restart delay-1")
delay1, err := getRestartDelay(f.Client, pod, f.Namespace.Name, podName, containerName)
if err != nil {
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
}
By("getting restart delay-2")
delay2, err := getRestartDelay(f.Client, pod, f.Namespace.Name, podName, containerName)
if err != nil {
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
}
return delay1, delay2
}
func getRestartDelay(c *client.Client, pod *api.Pod, ns string, name string, containerName string) (time.Duration, error) {
beginTime := time.Now()
for time.Since(beginTime) < (2 * maxBackOffTolerance) { // may just miss the 1st MaxContainerBackOff delay
time.Sleep(time.Second)
pod, err := c.Pods(ns).Get(name)
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s", name))
status, ok := api.GetContainerStatus(pod.Status.ContainerStatuses, containerName)
if !ok {
framework.Logf("getRestartDelay: status missing")
continue
}
if status.State.Waiting == nil && status.State.Running != nil && status.LastTerminationState.Terminated != nil && status.State.Running.StartedAt.Time.After(beginTime) {
startedAt := status.State.Running.StartedAt.Time
finishedAt := status.LastTerminationState.Terminated.FinishedAt.Time
framework.Logf("getRestartDelay: restartCount = %d, finishedAt=%s restartedAt=%s (%s)", status.RestartCount, finishedAt, startedAt, startedAt.Sub(finishedAt))
return startedAt.Sub(finishedAt), nil
}
}
return 0, fmt.Errorf("timeout getting pod restart delay")
}
var _ = framework.KubeDescribe("Pods", func() {
f := framework.NewDefaultFramework("pods")
It("should get a host IP [Conformance]", func() {
name := "pod-hostip-" + string(util.NewUUID())
testHostIP(f.Client, f.Namespace.Name, &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "test",
Image: framework.GetPauseImageName(f.Client),
},
},
},
})
})
It("should be schedule with cpu and memory limits [Conformance]", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-update-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "nginx",
Image: framework.GetPauseImageName(f.Client),
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(10*1024*1024, resource.DecimalSI),
},
},
},
},
},
}
defer podClient.Delete(pod.Name, nil)
_, err := podClient.Create(pod)
if err != nil {
framework.Failf("Error creating a pod: %v", err)
}
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
})
It("should be submitted and removed [Conformance]", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-update-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "nginx",
Image: "gcr.io/google_containers/nginx:1.7.9",
Ports: []api.ContainerPort{{ContainerPort: 80}},
LivenessProbe: &api.Probe{
Handler: api.Handler{
HTTPGet: &api.HTTPGetAction{
Path: "/index.html",
Port: intstr.FromInt(8080),
},
},
InitialDelaySeconds: 30,
},
},
},
},
}
By("setting up watch")
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options := api.ListOptions{LabelSelector: selector}
pods, err := podClient.List(options)
if err != nil {
framework.Failf("Failed to query for pods: %v", err)
}
Expect(len(pods.Items)).To(Equal(0))
options = api.ListOptions{
LabelSelector: selector,
ResourceVersion: pods.ListMeta.ResourceVersion,
}
w, err := podClient.Watch(options)
if err != nil {
framework.Failf("Failed to set up watch: %v", err)
}
By("submitting the pod to kubernetes")
// We call defer here in case there is a problem with
// the test so we can ensure that we clean up after
// ourselves
defer podClient.Delete(pod.Name, api.NewDeleteOptions(0))
_, err = podClient.Create(pod)
if err != nil {
framework.Failf("Failed to create pod: %v", err)
}
By("verifying the pod is in kubernetes")
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options = api.ListOptions{LabelSelector: selector}
pods, err = podClient.List(options)
if err != nil {
framework.Failf("Failed to query for pods: %v", err)
}
Expect(len(pods.Items)).To(Equal(1))
By("verifying pod creation was observed")
select {
case event, _ := <-w.ResultChan():
if event.Type != watch.Added {
framework.Failf("Failed to observe pod creation: %v", event)
}
case <-time.After(framework.PodStartTimeout):
Fail("Timeout while waiting for pod creation")
}
// We need to wait for the pod to be scheduled, otherwise the deletion
// will be carried out immediately rather than gracefully.
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
// save the scheduled pod
if pod, err = podClient.Get(pod.Name); err != nil {
Expect(err).NotTo(HaveOccurred(), "failed to GET scheduled pod")
}
framework.Logf("scheduled pod: %#v", pod)
By("deleting the pod gracefully")
if err := podClient.Delete(pod.Name, api.NewDeleteOptions(30)); err != nil {
framework.Failf("Failed to delete pod: %v", err)
}
By("verifying the kubelet observed the termination notice")
Expect(wait.Poll(time.Second*5, time.Second*30, func() (bool, error) {
podList, err := framework.GetKubeletPods(f.Client, pod.Spec.NodeName)
if err != nil {
framework.Logf("Unable to retrieve kubelet pods for node %v: %v", pod.Spec.NodeName, err)
return false, nil
}
for _, kubeletPod := range podList.Items {
if pod.Name != kubeletPod.Name {
continue
}
if kubeletPod.ObjectMeta.DeletionTimestamp == nil {
framework.Logf("deletion has not yet been observed")
return false, nil
}
return true, nil
}
framework.Logf("no pod exists with the name we were looking for, assuming the termination request was observed and completed")
return true, nil
})).NotTo(HaveOccurred(), "kubelet never observed the termination notice")
By("verifying pod deletion was observed")
deleted := false
timeout := false
var lastPod *api.Pod
timer := time.After(30 * time.Second)
for !deleted && !timeout {
select {
case event, _ := <-w.ResultChan():
if event.Type == watch.Deleted {
lastPod = event.Object.(*api.Pod)
deleted = true
}
case <-timer:
timeout = true
}
}
if !deleted {
Fail("Failed to observe pod deletion")
}
Expect(lastPod.DeletionTimestamp).ToNot(BeNil())
Expect(lastPod.Spec.TerminationGracePeriodSeconds).ToNot(BeZero())
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options = api.ListOptions{LabelSelector: selector}
pods, err = podClient.List(options)
if err != nil {
Fail(fmt.Sprintf("Failed to list pods to verify deletion: %v", err))
}
Expect(len(pods.Items)).To(Equal(0))
})
It("should be updated [Conformance]", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-update-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "nginx",
Image: "gcr.io/google_containers/nginx:1.7.9",
Ports: []api.ContainerPort{{ContainerPort: 80}},
LivenessProbe: &api.Probe{
Handler: api.Handler{
HTTPGet: &api.HTTPGetAction{
Path: "/index.html",
Port: intstr.FromInt(8080),
},
},
InitialDelaySeconds: 30,
},
},
},
},
}
By("submitting the pod to kubernetes")
defer func() {
By("deleting the pod")
podClient.Delete(pod.Name, api.NewDeleteOptions(0))
}()
pod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Failed to create pod: %v", err)
}
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
By("verifying the pod is in kubernetes")
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options := api.ListOptions{LabelSelector: selector}
pods, err := podClient.List(options)
Expect(len(pods.Items)).To(Equal(1))
// Standard get, update retry loop
framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*30, func() (bool, error) {
By("updating the pod")
value = strconv.Itoa(time.Now().Nanosecond())
if pod == nil { // on retries we need to re-get
pod, err = podClient.Get(name)
if err != nil {
return false, fmt.Errorf("failed to get pod: %v", err)
}
}
pod.Labels["time"] = value
pod, err = podClient.Update(pod)
if err == nil {
framework.Logf("Successfully updated pod")
return true, nil
}
if errors.IsConflict(err) {
framework.Logf("Conflicting update to pod, re-get and re-update: %v", err)
pod = nil // re-get it when we retry
return false, nil
}
return false, fmt.Errorf("failed to update pod: %v", err)
}))
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
By("verifying the updated pod is in kubernetes")
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options = api.ListOptions{LabelSelector: selector}
pods, err = podClient.List(options)
Expect(len(pods.Items)).To(Equal(1))
framework.Logf("Pod update OK")
})
It("should allow activeDeadlineSeconds to be updated [Conformance]", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-update-activedeadlineseconds-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "nginx",
Image: "gcr.io/google_containers/nginx:1.7.9",
Ports: []api.ContainerPort{{ContainerPort: 80}},
LivenessProbe: &api.Probe{
Handler: api.Handler{
HTTPGet: &api.HTTPGetAction{
Path: "/index.html",
Port: intstr.FromInt(8080),
},
},
InitialDelaySeconds: 30,
},
},
},
},
}
By("submitting the pod to kubernetes")
defer func() {
By("deleting the pod")
podClient.Delete(pod.Name, api.NewDeleteOptions(0))
}()
pod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Failed to create pod: %v", err)
}
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
By("verifying the pod is in kubernetes")
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
options := api.ListOptions{LabelSelector: selector}
pods, err := podClient.List(options)
Expect(len(pods.Items)).To(Equal(1))
// Standard get, update retry loop
framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*30, func() (bool, error) {
By("updating the pod")
value = strconv.Itoa(time.Now().Nanosecond())
if pod == nil { // on retries we need to re-get
pod, err = podClient.Get(name)
if err != nil {
return false, fmt.Errorf("failed to get pod: %v", err)
}
}
newDeadline := int64(5)
pod.Spec.ActiveDeadlineSeconds = &newDeadline
pod, err = podClient.Update(pod)
if err == nil {
framework.Logf("Successfully updated pod")
return true, nil
}
if errors.IsConflict(err) {
framework.Logf("Conflicting update to pod, re-get and re-update: %v", err)
pod = nil // re-get it when we retry
return false, nil
}
return false, fmt.Errorf("failed to update pod: %v", err)
}))
framework.ExpectNoError(f.WaitForPodTerminated(pod.Name, "DeadlineExceeded"))
})
It("should contain environment variables for services [Conformance]", func() {
// Make a pod that will be a service.
// This pod serves its hostname via HTTP.
serverName := "server-envvars-" + string(util.NewUUID())
serverPod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: serverName,
Labels: map[string]string{"name": serverName},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "srv",
Image: "gcr.io/google_containers/serve_hostname:v1.4",
Ports: []api.ContainerPort{{ContainerPort: 9376}},
},
},
},
}
defer f.Client.Pods(f.Namespace.Name).Delete(serverPod.Name, api.NewDeleteOptions(0))
_, err := f.Client.Pods(f.Namespace.Name).Create(serverPod)
if err != nil {
framework.Failf("Failed to create serverPod: %v", err)
}
framework.ExpectNoError(f.WaitForPodRunning(serverPod.Name))
// This service exposes port 8080 of the test pod as a service on port 8765
// TODO(filbranden): We would like to use a unique service name such as:
// svcName := "svc-envvars-" + randomSuffix()
// However, that affects the name of the environment variables which are the capitalized
// service name, so that breaks this test. One possibility is to tweak the variable names
// to match the service. Another is to rethink environment variable names and possibly
// allow overriding the prefix in the service manifest.
svcName := "fooservice"
svc := &api.Service{
ObjectMeta: api.ObjectMeta{
Name: svcName,
Labels: map[string]string{
"name": svcName,
},
},
Spec: api.ServiceSpec{
Ports: []api.ServicePort{{
Port: 8765,
TargetPort: intstr.FromInt(8080),
}},
Selector: map[string]string{
"name": serverName,
},
},
}
defer f.Client.Services(f.Namespace.Name).Delete(svc.Name)
_, err = f.Client.Services(f.Namespace.Name).Create(svc)
if err != nil {
framework.Failf("Failed to create service: %v", err)
}
// Make a client pod that verifies that it has the service environment variables.
podName := "client-envvars-" + string(util.NewUUID())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: podName,
Labels: map[string]string{"name": podName},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "env3cont",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"sh", "-c", "env"},
},
},
RestartPolicy: api.RestartPolicyNever,
},
}
f.TestContainerOutput("service env", pod, 0, []string{
"FOOSERVICE_SERVICE_HOST=",
"FOOSERVICE_SERVICE_PORT=",
"FOOSERVICE_PORT=",
"FOOSERVICE_PORT_8765_TCP_PORT=",
"FOOSERVICE_PORT_8765_TCP_PROTO=",
"FOOSERVICE_PORT_8765_TCP=",
"FOOSERVICE_PORT_8765_TCP_ADDR=",
})
})
It("should invoke init containers on a RestartNever pod", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-init-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyNever,
InitContainers: []api.Container{
{
Name: "init1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
{
Name: "init2",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
},
Containers: []api.Container{
{
Name: "run1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
},
},
}
defer podClient.Delete(pod.Name, nil)
startedPod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Error creating a pod: %v", err)
}
w, err := podClient.Watch(api.SingleObject(startedPod.ObjectMeta))
if err != nil {
framework.Failf("Error watching a pod: %v", err)
}
wr := watch.NewRecorder(w)
event, err := watch.Until(framework.PodStartTimeout, wr, client.PodCompleted)
Expect(err).To(BeNil())
framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
endPod := event.Object.(*api.Pod)
Expect(endPod.Status.Phase).To(Equal(api.PodSucceeded))
_, init := api.GetPodCondition(&endPod.Status, api.PodInitialized)
Expect(init).NotTo(BeNil())
Expect(init.Status).To(Equal(api.ConditionTrue))
Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
for _, status := range endPod.Status.InitContainerStatuses {
Expect(status.Ready).To(BeTrue())
Expect(status.State.Terminated).NotTo(BeNil())
Expect(status.State.Terminated.ExitCode).To(BeZero())
}
})
It("should invoke init containers on a RestartAlways pod", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-init-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
InitContainers: []api.Container{
{
Name: "init1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
{
Name: "init2",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
},
Containers: []api.Container{
{
Name: "run1",
Image: framework.GetPauseImageName(f.Client),
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(10*1024*1024, resource.DecimalSI),
},
},
},
},
},
}
defer podClient.Delete(pod.Name, nil)
startedPod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Error creating a pod: %v", err)
}
w, err := podClient.Watch(api.SingleObject(startedPod.ObjectMeta))
if err != nil {
framework.Failf("Error watching a pod: %v", err)
}
wr := watch.NewRecorder(w)
event, err := watch.Until(framework.PodStartTimeout, wr, client.PodRunning)
Expect(err).To(BeNil())
framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
endPod := event.Object.(*api.Pod)
Expect(endPod.Status.Phase).To(Equal(api.PodRunning))
_, init := api.GetPodCondition(&endPod.Status, api.PodInitialized)
Expect(init).NotTo(BeNil())
Expect(init.Status).To(Equal(api.ConditionTrue))
Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
for _, status := range endPod.Status.InitContainerStatuses {
Expect(status.Ready).To(BeTrue())
Expect(status.State.Terminated).NotTo(BeNil())
Expect(status.State.Terminated.ExitCode).To(BeZero())
}
})
It("should not start app containers if init containers fail on a RestartAlways pod", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-init-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
InitContainers: []api.Container{
{
Name: "init1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/false"},
},
{
Name: "init2",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
},
Containers: []api.Container{
{
Name: "run1",
Image: framework.GetPauseImageName(f.Client),
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(10*1024*1024, resource.DecimalSI),
},
},
},
},
},
}
defer podClient.Delete(pod.Name, nil)
startedPod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Error creating a pod: %v", err)
}
w, err := podClient.Watch(api.SingleObject(startedPod.ObjectMeta))
if err != nil {
framework.Failf("Error watching a pod: %v", err)
}
wr := watch.NewRecorder(w)
event, err := watch.Until(
framework.PodStartTimeout, wr,
// check for the first container to fail at least once
func(evt watch.Event) (bool, error) {
switch t := evt.Object.(type) {
case *api.Pod:
for _, status := range t.Status.ContainerStatuses {
if status.State.Waiting == nil {
return false, fmt.Errorf("container %q should not be out of waiting: %#v", status.Name, status)
}
if status.State.Waiting.Reason != "PodInitializing" {
return false, fmt.Errorf("container %q should have reason PodInitializing: %#v", status.Name, status)
}
}
if len(t.Status.InitContainerStatuses) != 2 {
return false, nil
}
status := t.Status.InitContainerStatuses[1]
if status.State.Waiting == nil {
return false, fmt.Errorf("second init container should not be out of waiting: %#v", status)
}
if status.State.Waiting.Reason != "PodInitializing" {
return false, fmt.Errorf("second init container should have reason PodInitializing: %#v", status)
}
status = t.Status.InitContainerStatuses[0]
if status.State.Terminated != nil && status.State.Terminated.ExitCode == 0 {
return false, fmt.Errorf("first init container should have exitCode != 0: %#v", status)
}
// continue until we see an attempt to restart the pod
return status.LastTerminationState.Terminated != nil, nil
default:
return false, fmt.Errorf("unexpected object: %#v", t)
}
},
// verify we get two restarts
func(evt watch.Event) (bool, error) {
switch t := evt.Object.(type) {
case *api.Pod:
status := t.Status.InitContainerStatuses[0]
if status.RestartCount < 3 {
return false, nil
}
framework.Logf("init container has failed twice: %#v", t)
// TODO: more conditions
return true, nil
default:
return false, fmt.Errorf("unexpected object: %#v", t)
}
},
)
Expect(err).To(BeNil())
framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
endPod := event.Object.(*api.Pod)
Expect(endPod.Status.Phase).To(Equal(api.PodPending))
_, init := api.GetPodCondition(&endPod.Status, api.PodInitialized)
Expect(init).NotTo(BeNil())
Expect(init.Status).To(Equal(api.ConditionFalse))
Expect(init.Reason).To(Equal("ContainersNotInitialized"))
Expect(init.Message).To(Equal("containers with incomplete status: [init1 init2]"))
Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
})
It("should not start app containers and fail the pod if init containers fail on a RestartNever pod", func() {
podClient := f.Client.Pods(f.Namespace.Name)
By("creating the pod")
name := "pod-init-" + string(util.NewUUID())
value := strconv.Itoa(time.Now().Nanosecond())
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: name,
Labels: map[string]string{
"name": "foo",
"time": value,
},
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyNever,
InitContainers: []api.Container{
{
Name: "init1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
},
{
Name: "init2",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/false"},
},
},
Containers: []api.Container{
{
Name: "run1",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"/bin/true"},
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(10*1024*1024, resource.DecimalSI),
},
},
},
},
},
}
defer podClient.Delete(pod.Name, nil)
startedPod, err := podClient.Create(pod)
if err != nil {
framework.Failf("Error creating a pod: %v", err)
}
w, err := podClient.Watch(api.SingleObject(startedPod.ObjectMeta))
if err != nil {
framework.Failf("Error watching a pod: %v", err)
}
wr := watch.NewRecorder(w)
event, err := watch.Until(
framework.PodStartTimeout, wr,
// check for the second container to fail at least once
func(evt watch.Event) (bool, error) {
switch t := evt.Object.(type) {
case *api.Pod:
for _, status := range t.Status.ContainerStatuses {
if status.State.Waiting == nil {
return false, fmt.Errorf("container %q should not be out of waiting: %#v", status.Name, status)
}
if status.State.Waiting.Reason != "PodInitializing" {
return false, fmt.Errorf("container %q should have reason PodInitializing: %#v", status.Name, status)
}
}
if len(t.Status.InitContainerStatuses) != 2 {
return false, nil
}
status := t.Status.InitContainerStatuses[0]
if status.State.Terminated == nil {
if status.State.Waiting != nil && status.State.Waiting.Reason != "PodInitializing" {
return false, fmt.Errorf("second init container should have reason PodInitializing: %#v", status)
}
return false, nil
}
if status.State.Terminated != nil && status.State.Terminated.ExitCode != 0 {
return false, fmt.Errorf("first init container should have exitCode != 0: %#v", status)
}
status = t.Status.InitContainerStatuses[1]
if status.State.Terminated == nil {
return false, nil
}
if status.State.Terminated.ExitCode == 0 {