// runDensitySeqTest runs the density sequential pod creation test
func runDensitySeqTest(f *framework.Framework, rc *ResourceCollector, testArg densityTest) (time.Duration, []framework.PodLatencyData) {
const (
podType = "density_test_pod"
sleepBeforeCreatePods = 30 * time.Second
)
bgPods := newTestPods(testArg.bgPodsNr, ImageRegistry[pauseImage], "background_pod")
testPods := newTestPods(testArg.podsNr, ImageRegistry[pauseImage], podType)
By("Creating a batch of background pods")
// CreatBatch is synchronized, all pods are running when it returns
f.PodClient().CreateBatch(bgPods)
time.Sleep(sleepBeforeCreatePods)
rc.Start()
// Explicitly delete pods to prevent namespace controller cleanning up timeout
defer deletePodsSync(f, append(bgPods, append(testPods, getCadvisorPod())...))
defer rc.Stop()
// Create pods sequentially (back-to-back). e2eLags have been sorted.
batchlag, e2eLags := createBatchPodSequential(f, testPods)
// Log throughput data.
logPodCreateThroughput(batchlag, e2eLags, testArg.podsNr, testArg.getTestName())
return batchlag, e2eLags
}
// Clean both server and client pods.
func volumeTestCleanup(f *framework.Framework, config VolumeTestConfig) {
By(fmt.Sprint("cleaning the environment after ", config.prefix))
defer GinkgoRecover()
podClient := f.PodClient()
err := podClient.Delete(config.prefix+"-client", nil)
if err != nil {
// Log the error before failing test: if the test has already failed,
// framework.ExpectNoError() won't print anything to logs!
glog.Warningf("Failed to delete client pod: %v", err)
framework.ExpectNoError(err, "Failed to delete client pod: %v", err)
}
if config.serverImage != "" {
if err := f.WaitForPodTerminated(config.prefix+"-client", ""); !apierrs.IsNotFound(err) {
framework.ExpectNoError(err, "Failed to wait client pod terminated: %v", err)
}
// See issue #24100.
// Prevent umount errors by making sure making sure the client pod exits cleanly *before* the volume server pod exits.
By("sleeping a bit so client can stop and unmount")
time.Sleep(20 * time.Second)
err = podClient.Delete(config.prefix+"-server", nil)
if err != nil {
glog.Warningf("Failed to delete server pod: %v", err)
framework.ExpectNoError(err, "Failed to delete server pod: %v", err)
}
}
}
func testDownwardAPI(f *framework.Framework, podName string, env []api.EnvVar, expectations []string) {
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: podName,
Labels: map[string]string{"name": podName},
},
Spec: api.PodSpec{
Containers: []api.Container{
{
Name: "dapi-container",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"sh", "-c", "env"},
Resources: api.ResourceRequirements{
Requests: api.ResourceList{
api.ResourceCPU: resource.MustParse("250m"),
api.ResourceMemory: resource.MustParse("32Mi"),
},
Limits: api.ResourceList{
api.ResourceCPU: resource.MustParse("1250m"),
api.ResourceMemory: resource.MustParse("64Mi"),
},
},
Env: env,
},
},
RestartPolicy: api.RestartPolicyNever,
},
}
// TODO(random-liu): Change TestContainerOutputRegexp to use PodClient and avoid MungeSpec explicitly
f.PodClient().MungeSpec(pod)
f.TestContainerOutputRegexp("downward api env vars", pod, 0, expectations)
}
func reportLogsFromFluentdPod(f *framework.Framework) error {
synthLoggerPod, err := f.PodClient().Get(synthLoggerPodName, metav1.GetOptions{})
if err != nil {
return fmt.Errorf("Failed to get synth logger pod due to %v", err)
}
synthLoggerNodeName := synthLoggerPod.Spec.NodeName
if synthLoggerNodeName == "" {
return errors.New("Synthlogger pod is not assigned to the node")
}
label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "fluentd-logging"}))
options := v1.ListOptions{LabelSelector: label.String()}
fluentdPods, err := f.ClientSet.Core().Pods(api.NamespaceSystem).List(options)
for _, fluentdPod := range fluentdPods.Items {
if fluentdPod.Spec.NodeName == synthLoggerNodeName {
containerName := fluentdPod.Spec.Containers[0].Name
logs, err := framework.GetPodLogs(f.ClientSet, api.NamespaceSystem, fluentdPod.Name, containerName)
if err != nil {
return fmt.Errorf("Failed to get logs from fluentd pod %s due to %v", fluentdPod.Name, err)
}
framework.Logf("Logs from fluentd pod %s:\n%s", fluentdPod.Name, logs)
return nil
}
}
return fmt.Errorf("Failed to find fluentd pod running on node %s", synthLoggerNodeName)
}
func runAppArmorTest(f *framework.Framework, profile string) api.PodStatus {
pod := createPodWithAppArmor(f, profile)
framework.ExpectNoError(f.WaitForPodNoLongerRunning(pod.Name))
p, err := f.PodClient().Get(pod.Name)
framework.ExpectNoError(err)
return p.Status
}
func runAppArmorTest(f *framework.Framework, shouldRun bool, profile string) v1.PodStatus {
pod := createPodWithAppArmor(f, profile)
if shouldRun {
// The pod needs to start before it stops, so wait for the longer start timeout.
framework.ExpectNoError(framework.WaitTimeoutForPodNoLongerRunningInNamespace(
f.ClientSet, pod.Name, f.Namespace.Name, "", framework.PodStartTimeout))
} else {
// Pod should remain in the pending state. Wait for the Reason to be set to "AppArmor".
w, err := f.PodClient().Watch(v1.SingleObject(metav1.ObjectMeta{Name: pod.Name}))
framework.ExpectNoError(err)
_, err = watch.Until(framework.PodStartTimeout, w, func(e watch.Event) (bool, error) {
switch e.Type {
case watch.Deleted:
return false, errors.NewNotFound(schema.GroupResource{Resource: "pods"}, pod.Name)
}
switch t := e.Object.(type) {
case *v1.Pod:
if t.Status.Reason == "AppArmor" {
return true, nil
}
}
return false, nil
})
framework.ExpectNoError(err)
}
p, err := f.PodClient().Get(pod.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
return p.Status
}
func runLivenessTest(f *framework.Framework, pod *v1.Pod, expectNumRestarts int, timeout time.Duration) {
podClient := f.PodClient()
ns := f.Namespace.Name
Expect(pod.Spec.Containers).NotTo(BeEmpty())
containerName := pod.Spec.Containers[0].Name
// At the end of the test, clean up by removing the pod.
defer func() {
By("deleting the pod")
podClient.Delete(pod.Name, v1.NewDeleteOptions(0))
}()
By(fmt.Sprintf("Creating pod %s in namespace %s", pod.Name, ns))
podClient.Create(pod)
// 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(f.ClientSet, ns, pod.Name, pod.ResourceVersion),
fmt.Sprintf("starting pod %s in namespace %s", pod.Name, ns))
framework.Logf("Started pod %s in namespace %s", pod.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 := podClient.Get(pod.Name, metav1.GetOptions{})
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s in namespace %s", pod.Name, ns))
initialRestartCount := v1.GetExistingContainerStatus(pod.Status.ContainerStatuses, containerName).RestartCount
framework.Logf("Initial restart count of pod %s is %d", pod.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 = podClient.Get(pod.Name, metav1.GetOptions{})
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s", pod.Name))
restartCount := v1.GetExistingContainerStatus(pod.Status.ContainerStatuses, containerName).RestartCount
if restartCount != lastRestartCount {
framework.Logf("Restart count of pod %s/%s is now %d (%v elapsed)",
ns, pod.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, pod.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: %d, found restarts: %d",
ns, pod.Name, expectNumRestarts, observedRestarts)
}
}
func runAppArmorTest(f *framework.Framework, profile string) api.PodStatus {
pod := createPodWithAppArmor(f, profile)
// The pod needs to start before it stops, so wait for the longer start timeout.
framework.ExpectNoError(framework.WaitTimeoutForPodNoLongerRunningInNamespace(
f.Client, pod.Name, f.Namespace.Name, "", framework.PodStartTimeout))
p, err := f.PodClient().Get(pod.Name)
framework.ExpectNoError(err)
return p.Status
}
// createBatchPodWithRateControl creates a batch of pods concurrently, uses one goroutine for each creation.
// between creations there is an interval for throughput control
func createBatchPodWithRateControl(f *framework.Framework, pods []*api.Pod, interval time.Duration) map[string]unversioned.Time {
createTimes := make(map[string]unversioned.Time)
for _, pod := range pods {
createTimes[pod.ObjectMeta.Name] = unversioned.Now()
go f.PodClient().Create(pod)
time.Sleep(interval)
}
return createTimes
}
// createBatchPodSequential creats pods back-to-back in sequence.
func createBatchPodSequential(f *framework.Framework, pods []*api.Pod) (time.Duration, []framework.PodLatencyData) {
batchStartTime := unversioned.Now()
e2eLags := make([]framework.PodLatencyData, 0)
for _, pod := range pods {
create := unversioned.Now()
f.PodClient().CreateSync(pod)
e2eLags = append(e2eLags,
framework.PodLatencyData{Name: pod.Name, Latency: unversioned.Now().Time.Sub(create.Time)})
}
batchLag := unversioned.Now().Time.Sub(batchStartTime.Time)
sort.Sort(framework.LatencySlice(e2eLags))
return batchLag, e2eLags
}
func createMemhogPod(f *framework.Framework, genName string, ctnName string, res api.ResourceRequirements) *api.Pod {
env := []api.EnvVar{
{
Name: "MEMORY_LIMIT",
ValueFrom: &api.EnvVarSource{
ResourceFieldRef: &api.ResourceFieldSelector{
Resource: "limits.memory",
},
},
},
}
// If there is a limit specified, pass 80% of it for -mem-total, otherwise use the downward API
// to pass limits.memory, which will be the total memory available.
// This helps prevent a guaranteed pod from triggering an OOM kill due to it's low memory limit,
// which will cause the test to fail inappropriately.
var memLimit string
if limit, ok := res.Limits["memory"]; ok {
memLimit = strconv.Itoa(int(
float64(limit.Value()) * 0.8))
} else {
memLimit = "$(MEMORY_LIMIT)"
}
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
GenerateName: genName,
},
Spec: api.PodSpec{
RestartPolicy: api.RestartPolicyNever,
Containers: []api.Container{
{
Name: ctnName,
Image: "gcr.io/google-containers/stress:v1",
ImagePullPolicy: "Always",
Env: env,
// 60 min timeout * 60s / tick per 10s = 360 ticks before timeout => ~11.11Mi/tick
// to fill ~4Gi of memory, so initial ballpark 12Mi/tick.
// We might see flakes due to timeout if the total memory on the nodes increases.
Args: []string{"-mem-alloc-size", "12Mi", "-mem-alloc-sleep", "10s", "-mem-total", memLimit},
Resources: res,
},
},
},
}
// The generated pod.Name will be on the pod spec returned by CreateSync
pod = f.PodClient().CreateSync(pod)
glog.Infof("pod created with name: %s", pod.Name)
return pod
}
// runResourceUsageTest runs the resource usage test
func runResourceUsageTest(f *framework.Framework, rc *ResourceCollector, testArg resourceTest) {
const (
// The monitoring time for one test
monitoringTime = 10 * time.Minute
// The periodic reporting period
reportingPeriod = 5 * time.Minute
// sleep for an interval here to measure steady data
sleepAfterCreatePods = 10 * time.Second
)
pods := newTestPods(testArg.podsNr, ImageRegistry[pauseImage], "test_pod")
rc.Start()
// Explicitly delete pods to prevent namespace controller cleanning up timeout
defer deletePodsSync(f, append(pods, getCadvisorPod()))
defer rc.Stop()
By("Creating a batch of Pods")
f.PodClient().CreateBatch(pods)
// wait for a while to let the node be steady
time.Sleep(sleepAfterCreatePods)
// Log once and flush the stats.
rc.LogLatest()
rc.Reset()
By("Start monitoring resource usage")
// Periodically dump the cpu summary until the deadline is met.
// Note that without calling framework.ResourceMonitor.Reset(), the stats
// would occupy increasingly more memory. This should be fine
// for the current test duration, but we should reclaim the
// entries if we plan to monitor longer (e.g., 8 hours).
deadline := time.Now().Add(monitoringTime)
for time.Now().Before(deadline) {
timeLeft := deadline.Sub(time.Now())
framework.Logf("Still running...%v left", timeLeft)
if timeLeft < reportingPeriod {
time.Sleep(timeLeft)
} else {
time.Sleep(reportingPeriod)
}
logPods(f.Client)
}
By("Reporting overall resource usage")
logPods(f.Client)
}
// deletePodsSync deletes a list of pods and block until pods disappear.
func deletePodsSync(f *framework.Framework, pods []*v1.Pod) {
var wg sync.WaitGroup
for _, pod := range pods {
wg.Add(1)
go func(pod *v1.Pod) {
defer wg.Done()
err := f.PodClient().Delete(pod.ObjectMeta.Name, v1.NewDeleteOptions(30))
Expect(err).NotTo(HaveOccurred())
Expect(framework.WaitForPodToDisappear(f.ClientSet, f.Namespace.Name, pod.ObjectMeta.Name, labels.Everything(),
30*time.Second, 10*time.Minute)).NotTo(HaveOccurred())
}(pod)
}
wg.Wait()
return
}
func createPodWithAppArmor(f *framework.Framework, profile string) *v1.Pod {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("test-apparmor-%s", strings.Replace(profile, "/", "-", -1)),
Annotations: map[string]string{
apparmor.ContainerAnnotationKeyPrefix + "test": profile,
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{{
Name: "test",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"touch", "foo"},
}},
RestartPolicy: v1.RestartPolicyNever,
},
}
return f.PodClient().Create(pod)
}
func createPodWithAppArmor(f *framework.Framework, profile string) *api.Pod {
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: fmt.Sprintf("test-apparmor-%s", strings.Replace(profile, "/", "-", -1)),
Annotations: map[string]string{
"container.apparmor.security.alpha.kubernetes.io/test": profile,
},
},
Spec: api.PodSpec{
Containers: []api.Container{{
Name: "test",
Image: ImageRegistry[busyBoxImage],
Command: []string{"touch", "foo"},
}},
RestartPolicy: api.RestartPolicyNever,
},
}
return f.PodClient().Create(pod)
}
func createSynthLogger(f *framework.Framework, linesCount int) {
f.PodClient().Create(&v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: synthLoggerPodName,
Namespace: f.Namespace.Name,
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyOnFailure,
Containers: []v1.Container{
{
Name: synthLoggerPodName,
Image: "gcr.io/google_containers/busybox:1.24",
// notice: the subshell syntax is escaped with `$$`
Command: []string{"/bin/sh", "-c", fmt.Sprintf("i=0; while [ $i -lt %d ]; do echo $i; i=`expr $i + 1`; done", linesCount)},
},
},
},
})
}
func createSummaryTestPods(f *framework.Framework, names ...string) {
pods := make([]*v1.Pod, 0, len(names))
for _, name := range names {
pods = append(pods, &v1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: name,
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyAlways,
Containers: []v1.Container{
{
Name: "busybox-container",
Image: "gcr.io/google_containers/busybox:1.24",
Command: []string{"sh", "-c", "ping -c 1 google.com; while true; do echo 'hello world' >> /test-empty-dir-mnt/file ; sleep 1; done"},
Resources: v1.ResourceRequirements{
Limits: v1.ResourceList{
// Must set memory limit to get MemoryStats.AvailableBytes
v1.ResourceMemory: resource.MustParse("10M"),
},
},
VolumeMounts: []v1.VolumeMount{
{MountPath: "/test-empty-dir-mnt", Name: "test-empty-dir"},
},
},
},
SecurityContext: &v1.PodSecurityContext{
SELinuxOptions: &v1.SELinuxOptions{
Level: "s0",
},
},
Volumes: []v1.Volume{
// TODO(#28393): Test secret volumes
// TODO(#28394): Test hostpath volumes
{Name: "test-empty-dir", VolumeSource: v1.VolumeSource{EmptyDir: &v1.EmptyDirVolumeSource{}}},
},
},
})
}
f.PodClient().CreateBatch(pods)
}
// waitForPods waits for timeout duration, for pod_count.
// If the timeout is hit, it returns the list of currently running pods.
func waitForPods(f *framework.Framework, pod_count int, timeout time.Duration) (runningPods []*v1.Pod) {
for start := time.Now(); time.Since(start) < timeout; time.Sleep(10 * time.Second) {
podList, err := f.PodClient().List(v1.ListOptions{})
if err != nil {
framework.Logf("Failed to list pods on node: %v", err)
continue
}
runningPods = []*v1.Pod{}
for _, pod := range podList.Items {
if r, err := testutils.PodRunningReady(&pod); err != nil || !r {
continue
}
runningPods = append(runningPods, &pod)
}
framework.Logf("Running pod count %d", len(runningPods))
if len(runningPods) >= pod_count {
break
}
}
return runningPods
}
// Start a client pod using given VolumeSource (exported by startVolumeServer())
// and check that the pod sees the data from the server pod.
func testVolumeClient(f *framework.Framework, config VolumeTestConfig, volume v1.VolumeSource, fsGroup *int64, expectedContent string) {
By(fmt.Sprint("starting ", config.prefix, " client"))
clientPod := &v1.Pod{
TypeMeta: metav1.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: config.prefix + "-client",
Labels: map[string]string{
"role": config.prefix + "-client",
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.prefix + "-client",
Image: "gcr.io/google_containers/busybox:1.24",
WorkingDir: "/opt",
// An imperative and easily debuggable container which reads vol contents for
// us to scan in the tests or by eye.
// We expect that /opt is empty in the minimal containers which we use in this test.
Command: []string{
"/bin/sh",
"-c",
"while true ; do cat /opt/index.html ; sleep 2 ; ls -altrh /opt/ ; sleep 2 ; done ",
},
VolumeMounts: []v1.VolumeMount{
{
Name: config.prefix + "-volume",
MountPath: "/opt/",
},
},
},
},
SecurityContext: &v1.PodSecurityContext{
SELinuxOptions: &v1.SELinuxOptions{
Level: "s0:c0,c1",
},
},
Volumes: []v1.Volume{
{
Name: config.prefix + "-volume",
VolumeSource: volume,
},
},
},
}
podClient := f.PodClient()
if fsGroup != nil {
clientPod.Spec.SecurityContext.FSGroup = fsGroup
}
clientPod = podClient.CreateSync(clientPod)
By("Checking that text file contents are perfect.")
result := f.ExecCommandInPod(clientPod.Name, "cat", "/opt/index.html")
var err error
if !strings.Contains(result, expectedContent) {
err = fmt.Errorf("Failed to find \"%s\", last result: \"%s\"", expectedContent, result)
}
Expect(err).NotTo(HaveOccurred(), "failed: finding the contents of the mounted file.")
if fsGroup != nil {
By("Checking fsGroup is correct.")
_, err := framework.LookForStringInPodExec(config.namespace, clientPod.Name, []string{"ls", "-ld", "/opt"}, strconv.Itoa(int(*fsGroup)), time.Minute)
Expect(err).NotTo(HaveOccurred(), "failed: getting the right priviliges in the file %v", int(*fsGroup))
}
}
// runEvictionTest sets up a testing environment given the provided nodes, and checks a few things:
// It ensures that the desired testCondition is actually triggered.
// It ensures that evictionPriority 0 pods are not evicted
// It ensures that lower evictionPriority pods are always evicted before higher evictionPriority pods (2 evicted before 1, etc.)
// It ensures that all lower evictionPriority pods are eventually evicted.
// runEvictionTest then cleans up the testing environment by deleting provided nodes, and ensures that testCondition no longer exists
func runEvictionTest(f *framework.Framework, testCondition string, podTestSpecs []podTestSpec,
evictionTestTimeout time.Duration, hasPressureCondition func(*framework.Framework, string) (bool, error)) {
Context(fmt.Sprintf("when we run containers that should cause %s", testCondition), func() {
BeforeEach(func() {
By("seting up pods to be used by tests")
for _, spec := range podTestSpecs {
By(fmt.Sprintf("creating pod with container: %s", spec.pod.Name))
f.PodClient().CreateSync(&spec.pod)
}
})
It(fmt.Sprintf("should eventually see %s, and then evict all of the correct pods", testCondition), func() {
Eventually(func() error {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
if hasPressure {
return nil
}
return fmt.Errorf("Condition: %s not encountered", testCondition)
}, evictionTestTimeout, evictionPollInterval).Should(BeNil())
Eventually(func() error {
// Gather current information
updatedPodList, err := f.ClientSet.Core().Pods(f.Namespace.Name).List(v1.ListOptions{})
updatedPods := updatedPodList.Items
for _, p := range updatedPods {
framework.Logf("fetching pod %s; phase= %v", p.Name, p.Status.Phase)
}
_, err = hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
By("checking eviction ordering and ensuring important pods dont fail")
done := true
for _, priorityPodSpec := range podTestSpecs {
var priorityPod v1.Pod
for _, p := range updatedPods {
if p.Name == priorityPodSpec.pod.Name {
priorityPod = p
}
}
Expect(priorityPod).NotTo(BeNil())
// Check eviction ordering.
// Note: it is alright for a priority 1 and priority 2 pod (for example) to fail in the same round
for _, lowPriorityPodSpec := range podTestSpecs {
var lowPriorityPod v1.Pod
for _, p := range updatedPods {
if p.Name == lowPriorityPodSpec.pod.Name {
lowPriorityPod = p
}
}
Expect(lowPriorityPod).NotTo(BeNil())
if priorityPodSpec.evictionPriority < lowPriorityPodSpec.evictionPriority && lowPriorityPod.Status.Phase == v1.PodRunning {
Expect(priorityPod.Status.Phase).NotTo(Equal(v1.PodFailed),
fmt.Sprintf("%s pod failed before %s pod", priorityPodSpec.pod.Name, lowPriorityPodSpec.pod.Name))
}
}
// EvictionPriority 0 pods should not fail
if priorityPodSpec.evictionPriority == 0 {
Expect(priorityPod.Status.Phase).NotTo(Equal(v1.PodFailed),
fmt.Sprintf("%s pod failed (and shouldn't have failed)", priorityPod.Name))
}
// If a pod that is not evictionPriority 0 has not been evicted, we are not done
if priorityPodSpec.evictionPriority != 0 && priorityPod.Status.Phase != v1.PodFailed {
done = false
}
}
if done {
return nil
}
return fmt.Errorf("pods that caused %s have not been evicted.", testCondition)
}, evictionTestTimeout, evictionPollInterval).Should(BeNil())
})
AfterEach(func() {
By("making sure conditions eventually return to normal")
Eventually(func() bool {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
return hasPressure
}, evictionTestTimeout, evictionPollInterval).Should(BeFalse())
By("making sure conditions do not return")
Consistently(func() bool {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
return hasPressure
}, postTestConditionMonitoringPeriod, evictionPollInterval).Should(BeFalse())
By("making sure we can start a new pod after the test")
podName := "test-admit-pod"
f.PodClient().Create(&v1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Image: "gcr.io/google_containers/busybox:1.24",
Name: podName,
},
},
},
})
if CurrentGinkgoTestDescription().Failed && framework.TestContext.DumpLogsOnFailure {
logPodEvents(f)
logNodeEvents(f)
}
})
})
}
// runEvictionTest sets up a testing environment given the provided nodes, and checks a few things:
// It ensures that the desired testCondition is actually triggered.
// It ensures that evictionPriority 0 pods are not evicted
// It ensures that lower evictionPriority pods are always evicted before higher evictionPriority pods (2 evicted before 1, etc.)
// It ensures that all lower evictionPriority pods are eventually evicted.
// runEvictionTest then cleans up the testing environment by deleting provided nodes, and ensures that testCondition no longer exists
func runEvictionTest(f *framework.Framework, testCondition string, podTestSpecs []podTestSpec,
evictionTestTimeout time.Duration, hasPressureCondition func(*framework.Framework, string) (bool, error)) {
Context(fmt.Sprintf("when we run containers that should cause %s", testCondition), func() {
BeforeEach(func() {
By("seting up pods to be used by tests")
for _, spec := range podTestSpecs {
By(fmt.Sprintf("creating pod with container: %s", spec.pod.Name))
f.PodClient().CreateSync(&spec.pod)
}
})
It(fmt.Sprintf("should eventually see %s, and then evict all of the correct pods", testCondition), func() {
Eventually(func() error {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
if hasPressure {
return nil
}
return fmt.Errorf("Condition: %s not encountered", testCondition)
}, evictionTestTimeout, evictionPollInterval).Should(BeNil())
Eventually(func() error {
// Gather current information
updatedPodList, err := f.ClientSet.Core().Pods(f.Namespace.Name).List(v1.ListOptions{})
updatedPods := updatedPodList.Items
for _, p := range updatedPods {
framework.Logf("fetching pod %s; phase= %v", p.Name, p.Status.Phase)
}
_, err = hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
By("checking eviction ordering and ensuring important pods dont fail")
done := true
for _, priorityPodSpec := range podTestSpecs {
var priorityPod v1.Pod
for _, p := range updatedPods {
if p.Name == priorityPodSpec.pod.Name {
priorityPod = p
}
}
Expect(priorityPod).NotTo(BeNil())
// Check eviction ordering.
// Note: it is alright for a priority 1 and priority 2 pod (for example) to fail in the same round
for _, lowPriorityPodSpec := range podTestSpecs {
var lowPriorityPod v1.Pod
for _, p := range updatedPods {
if p.Name == lowPriorityPodSpec.pod.Name {
lowPriorityPod = p
}
}
Expect(lowPriorityPod).NotTo(BeNil())
if priorityPodSpec.evictionPriority < lowPriorityPodSpec.evictionPriority && lowPriorityPod.Status.Phase == v1.PodRunning {
Expect(priorityPod.Status.Phase).NotTo(Equal(v1.PodFailed),
fmt.Sprintf("%s pod failed before %s pod", priorityPodSpec.pod.Name, lowPriorityPodSpec.pod.Name))
}
}
// EvictionPriority 0 pods should not fail
if priorityPodSpec.evictionPriority == 0 {
Expect(priorityPod.Status.Phase).NotTo(Equal(v1.PodFailed),
fmt.Sprintf("%s pod failed (and shouldn't have failed)", priorityPod.Name))
}
// If a pod that is not evictionPriority 0 has not been evicted, we are not done
if priorityPodSpec.evictionPriority != 0 && priorityPod.Status.Phase != v1.PodFailed {
done = false
}
}
if done {
return nil
}
return fmt.Errorf("pods that caused %s have not been evicted.", testCondition)
}, evictionTestTimeout, evictionPollInterval).Should(BeNil())
// We observe pressure from the API server. The eviction manager observes pressure from the kubelet internal stats.
// This means the eviction manager will observe pressure before we will, creating a delay between when the eviction manager
// evicts a pod, and when we observe the pressure by querrying the API server. Add a delay here to account for this delay
By("making sure pressure from test has surfaced before continuing")
time.Sleep(pressureDelay)
By("making sure conditions eventually return to normal")
Eventually(func() error {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
if hasPressure {
return fmt.Errorf("Conditions havent returned to normal, we still have %s", testCondition)
}
return nil
}, evictionTestTimeout, evictionPollInterval).Should(BeNil())
By("making sure conditions do not return")
Consistently(func() error {
hasPressure, err := hasPressureCondition(f, testCondition)
framework.ExpectNoError(err, fmt.Sprintf("checking if we have %s", testCondition))
if hasPressure {
return fmt.Errorf("%s dissappeared and then reappeared", testCondition)
}
return nil
}, postTestConditionMonitoringPeriod, evictionPollInterval).Should(BeNil())
By("making sure we can start a new pod after the test")
podName := "test-admit-pod"
f.PodClient().CreateSync(&v1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Image: framework.GetPauseImageNameForHostArch(),
Name: podName,
},
},
},
})
})
AfterEach(func() {
By("deleting pods")
for _, spec := range podTestSpecs {
By(fmt.Sprintf("deleting pod: %s", spec.pod.Name))
f.PodClient().DeleteSync(spec.pod.Name, &v1.DeleteOptions{}, podDisappearTimeout)
}
if CurrentGinkgoTestDescription().Failed {
if framework.TestContext.DumpLogsOnFailure {
logPodEvents(f)
logNodeEvents(f)
}
By("sleeping to allow for cleanup of test")
time.Sleep(postTestConditionMonitoringPeriod)
}
})
})
}
func createGitServer(f *framework.Framework) (gitURL string, gitRepo string, cleanup func()) {
var err error
gitServerPodName := "git-server-" + string(uuid.NewUUID())
containerPort := 8000
labels := map[string]string{"name": gitServerPodName}
gitServerPod := &v1.Pod{
ObjectMeta: v1.ObjectMeta{
Name: gitServerPodName,
Labels: labels,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "git-repo",
Image: "gcr.io/google_containers/fakegitserver:0.1",
ImagePullPolicy: "IfNotPresent",
Ports: []v1.ContainerPort{
{ContainerPort: int32(containerPort)},
},
},
},
},
}
f.PodClient().CreateSync(gitServerPod)
// Portal IP and port
httpPort := 2345
gitServerSvc := &v1.Service{
ObjectMeta: v1.ObjectMeta{
Name: "git-server-svc",
},
Spec: v1.ServiceSpec{
Selector: labels,
Ports: []v1.ServicePort{
{
Name: "http-portal",
Port: int32(httpPort),
TargetPort: intstr.FromInt(containerPort),
},
},
},
}
if gitServerSvc, err = f.ClientSet.Core().Services(f.Namespace.Name).Create(gitServerSvc); err != nil {
framework.Failf("unable to create test git server service %s: %v", gitServerSvc.Name, err)
}
return "http://" + gitServerSvc.Spec.ClusterIP + ":" + strconv.Itoa(httpPort), "test", func() {
By("Cleaning up the git server pod")
if err := f.ClientSet.Core().Pods(f.Namespace.Name).Delete(gitServerPod.Name, v1.NewDeleteOptions(0)); err != nil {
framework.Failf("unable to delete git server pod %v: %v", gitServerPod.Name, err)
}
By("Cleaning up the git server svc")
if err := f.ClientSet.Core().Services(f.Namespace.Name).Delete(gitServerSvc.Name, nil); err != nil {
framework.Failf("unable to delete git server svc %v: %v", gitServerSvc.Name, err)
}
}
}
func createCadvisorPod(f *framework.Framework) {
f.PodClient().CreateSync(&api.Pod{
ObjectMeta: api.ObjectMeta{
Name: cadvisorPodName,
},
Spec: api.PodSpec{
// It uses a host port for the tests to collect data.
// Currently we can not use port mapping in test-e2e-node.
SecurityContext: &api.PodSecurityContext{
HostNetwork: true,
},
Containers: []api.Container{
{
Image: cadvisorImageName,
Name: cadvisorPodName,
Ports: []api.ContainerPort{
{
Name: "http",
HostPort: cadvisorPort,
ContainerPort: cadvisorPort,
Protocol: api.ProtocolTCP,
},
},
VolumeMounts: []api.VolumeMount{
{
Name: "sys",
ReadOnly: true,
MountPath: "/sys",
},
{
Name: "var-run",
ReadOnly: false,
MountPath: "/var/run",
},
{
Name: "docker",
ReadOnly: true,
MountPath: "/var/lib/docker/",
},
{
Name: "rootfs",
ReadOnly: true,
MountPath: "/rootfs",
},
},
Args: []string{
"--profiling",
fmt.Sprintf("--housekeeping_interval=%ds", houseKeepingInterval),
fmt.Sprintf("--port=%d", cadvisorPort),
},
},
},
Volumes: []api.Volume{
{
Name: "rootfs",
VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/"}},
},
{
Name: "var-run",
VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/var/run"}},
},
{
Name: "sys",
VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/sys"}},
},
{
Name: "docker",
VolumeSource: api.VolumeSource{HostPath: &api.HostPathVolumeSource{Path: "/var/lib/docker"}},
},
},
},
})
}
// Tests the following:
// pods are created, and all containers restart the specified number of times
// while contianers are running, the number of copies of a single container does not exceed maxPerPodContainer
// while containers are running, the total number of containers does not exceed maxTotalContainers
// while containers are running, if not constrained by maxPerPodContainer or maxTotalContainers, keep an extra copy of each container
// once pods are killed, all containers are eventually cleaned up
func containerGCTest(f *framework.Framework, test testRun) {
Context(fmt.Sprintf("Garbage Collection Test: %s", test.testName), func() {
BeforeEach(func() {
realPods := getPods(test.testPods)
f.PodClient().CreateBatch(realPods)
By("Making sure all containers restart the specified number of times")
Eventually(func() error {
for _, podSpec := range test.testPods {
updatedPod, err := f.ClientSet.Core().Pods(f.Namespace.Name).Get(podSpec.podName, metav1.GetOptions{})
if err != nil {
return err
}
if len(updatedPod.Status.ContainerStatuses) != podSpec.numContainers {
return fmt.Errorf("expected pod %s to have %d containers, actual: %d",
updatedPod.Name, podSpec.numContainers, len(updatedPod.Status.ContainerStatuses))
}
for _, containerStatus := range updatedPod.Status.ContainerStatuses {
if containerStatus.RestartCount != podSpec.restartCount {
return fmt.Errorf("pod %s had container with restartcount %d. Should have been at least %d",
updatedPod.Name, containerStatus.RestartCount, podSpec.restartCount)
}
}
}
return nil
}, setupDuration, runtimePollInterval).Should(BeNil())
})
It(fmt.Sprintf("Should eventually garbage collect containers when we exceed the number of dead containers per container"), func() {
totalContainers := 0
for _, pod := range test.testPods {
totalContainers += pod.numContainers*2 + 1
}
Eventually(func() error {
total := 0
for _, pod := range test.testPods {
containerNames, err := pod.getContainerNames()
if err != nil {
return err
}
total += len(containerNames)
// Check maxPerPodContainer for each container in the pod
for i := 0; i < pod.numContainers; i++ {
containerCount := 0
for _, containerName := range containerNames {
if strings.Contains(containerName, pod.getContainerName(i)) {
containerCount += 1
}
}
if containerCount > maxPerPodContainer+1 {
return fmt.Errorf("expected number of copies of container: %s, to be <= maxPerPodContainer: %d; list of containers: %v",
pod.getContainerName(i), maxPerPodContainer, containerNames)
}
}
}
//Check maxTotalContainers. Currently, the default is -1, so this will never happen until we can configure maxTotalContainers
if maxTotalContainers > 0 && totalContainers <= maxTotalContainers && total > maxTotalContainers {
return fmt.Errorf("expected total number of containers: %v, to be <= maxTotalContainers: %v", total, maxTotalContainers)
}
return nil
}, garbageCollectDuration, runtimePollInterval).Should(BeNil())
if maxPerPodContainer >= 2 && maxTotalContainers < 0 { // make sure constraints wouldn't make us gc old containers
By("Making sure the kubelet consistently keeps around an extra copy of each container.")
Consistently(func() error {
for _, pod := range test.testPods {
containerNames, err := pod.getContainerNames()
if err != nil {
return err
}
for i := 0; i < pod.numContainers; i++ {
containerCount := 0
for _, containerName := range containerNames {
if strings.Contains(containerName, pod.getContainerName(i)) {
containerCount += 1
}
}
if pod.restartCount > 0 && containerCount < maxPerPodContainer+1 {
return fmt.Errorf("expected pod %v to have extra copies of old containers", pod.podName)
}
}
}
return nil
}, garbageCollectDuration, runtimePollInterval).Should(BeNil())
}
})
AfterEach(func() {
for _, pod := range test.testPods {
By(fmt.Sprintf("Deleting Pod %v", pod.podName))
f.PodClient().DeleteSync(pod.podName, &v1.DeleteOptions{}, defaultRuntimeRequestTimeoutDuration)
}
By("Making sure all containers get cleaned up")
Eventually(func() error {
for _, pod := range test.testPods {
containerNames, err := pod.getContainerNames()
if err != nil {
return err
}
if len(containerNames) > 0 {
return fmt.Errorf("%v containers still remain", containerNames)
}
}
return nil
}, garbageCollectDuration, runtimePollInterval).Should(BeNil())
if CurrentGinkgoTestDescription().Failed && framework.TestContext.DumpLogsOnFailure {
logNodeEvents(f)
logPodEvents(f)
}
})
})
}
// Starts a container specified by config.serverImage and exports all
// config.serverPorts from it. The returned pod should be used to get the server
// IP address and create appropriate VolumeSource.
func startVolumeServer(f *framework.Framework, config VolumeTestConfig) *v1.Pod {
podClient := f.PodClient()
portCount := len(config.serverPorts)
serverPodPorts := make([]v1.ContainerPort, portCount)
for i := 0; i < portCount; i++ {
portName := fmt.Sprintf("%s-%d", config.prefix, i)
serverPodPorts[i] = v1.ContainerPort{
Name: portName,
ContainerPort: int32(config.serverPorts[i]),
Protocol: v1.ProtocolTCP,
}
}
volumeCount := len(config.volumes)
volumes := make([]v1.Volume, volumeCount)
mounts := make([]v1.VolumeMount, volumeCount)
i := 0
for src, dst := range config.volumes {
mountName := fmt.Sprintf("path%d", i)
volumes[i].Name = mountName
volumes[i].VolumeSource.HostPath = &v1.HostPathVolumeSource{
Path: src,
}
mounts[i].Name = mountName
mounts[i].ReadOnly = false
mounts[i].MountPath = dst
i++
}
By(fmt.Sprint("creating ", config.prefix, " server pod"))
privileged := new(bool)
*privileged = true
serverPod := &v1.Pod{
TypeMeta: metav1.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
},
ObjectMeta: metav1.ObjectMeta{
Name: config.prefix + "-server",
Labels: map[string]string{
"role": config.prefix + "-server",
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: config.prefix + "-server",
Image: config.serverImage,
SecurityContext: &v1.SecurityContext{
Privileged: privileged,
},
Args: config.serverArgs,
Ports: serverPodPorts,
VolumeMounts: mounts,
},
},
Volumes: volumes,
},
}
serverPod = podClient.CreateSync(serverPod)
By("locating the server pod")
pod, err := podClient.Get(serverPod.Name, metav1.GetOptions{})
framework.ExpectNoError(err, "Cannot locate the server pod %v: %v", serverPod.Name, err)
By("sleeping a bit to give the server time to start")
time.Sleep(20 * time.Second)
return pod
}
func doConfigMapE2EWithMappings(f *framework.Framework, uid, fsGroup int64) {
var (
name = "configmap-test-volume-map-" + string(util.NewUUID())
volumeName = "configmap-volume"
volumeMountPath = "/etc/configmap-volume"
configMap = newConfigMap(f, name)
)
By(fmt.Sprintf("Creating configMap with name %s", configMap.Name))
var err error
if configMap, err = f.Client.ConfigMaps(f.Namespace.Name).Create(configMap); err != nil {
framework.Failf("unable to create test configMap %s: %v", configMap.Name, err)
}
pod := &api.Pod{
ObjectMeta: api.ObjectMeta{
Name: "pod-configmaps-" + string(util.NewUUID()),
},
Spec: api.PodSpec{
SecurityContext: &api.PodSecurityContext{},
Volumes: []api.Volume{
{
Name: volumeName,
VolumeSource: api.VolumeSource{
ConfigMap: &api.ConfigMapVolumeSource{
LocalObjectReference: api.LocalObjectReference{
Name: name,
},
Items: []api.KeyToPath{
{
Key: "data-2",
Path: "path/to/data-2",
},
},
},
},
},
},
Containers: []api.Container{
{
Name: "configmap-volume-test",
Image: "gcr.io/google_containers/mounttest:0.6",
Args: []string{"--file_content=/etc/configmap-volume/path/to/data-2"},
VolumeMounts: []api.VolumeMount{
{
Name: volumeName,
MountPath: volumeMountPath,
ReadOnly: true,
},
},
},
},
RestartPolicy: api.RestartPolicyNever,
},
}
if uid != 0 {
pod.Spec.SecurityContext.RunAsUser = &uid
}
if fsGroup != 0 {
pod.Spec.SecurityContext.FSGroup = &fsGroup
}
f.PodClient().MungeSpec(pod)
framework.TestContainerOutput("consume configMaps", f.Client, pod, 0, []string{
"content of file \"/etc/configmap-volume/path/to/data-2\": value-2",
}, f.Namespace.Name)
}
