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2f6c4f5eab
All code must use the context from Ginkgo when doing API calls or polling for a change, otherwise the code would not return immediately when the test gets aborted.
569 lines
19 KiB
Go
569 lines
19 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package node
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import (
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"context"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/client-go/tools/cache"
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watchtools "k8s.io/client-go/tools/watch"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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"k8s.io/kubernetes/pkg/client/conditions"
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"k8s.io/kubernetes/test/e2e/framework"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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imageutils "k8s.io/kubernetes/test/utils/image"
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admissionapi "k8s.io/pod-security-admission/api"
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)
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func recordEvents(events []watch.Event, f func(watch.Event) (bool, error)) func(watch.Event) (bool, error) {
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return func(e watch.Event) (bool, error) {
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events = append(events, e)
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return f(e)
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}
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}
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// invariantFunc is a func that checks for invariant.
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type invariantFunc func(older, newer runtime.Object) error
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// checkInvariants checks for invariant of the each events.
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func checkInvariants(events []watch.Event, fns ...invariantFunc) error {
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errs := sets.NewString()
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for i := range events {
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j := i + 1
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if j >= len(events) {
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continue
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}
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for _, fn := range fns {
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if err := fn(events[i].Object, events[j].Object); err != nil {
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errs.Insert(err.Error())
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}
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}
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}
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if errs.Len() > 0 {
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return fmt.Errorf("invariants violated:\n* %s", strings.Join(errs.List(), "\n* "))
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}
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return nil
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}
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// containerInitInvariant checks for an init containers are initialized and invariant on both older and newer.
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func containerInitInvariant(older, newer runtime.Object) error {
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oldPod := older.(*v1.Pod)
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newPod := newer.(*v1.Pod)
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if len(oldPod.Spec.InitContainers) == 0 {
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return nil
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}
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if len(oldPod.Spec.InitContainers) != len(newPod.Spec.InitContainers) {
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return fmt.Errorf("init container list changed")
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}
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if oldPod.UID != newPod.UID {
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return fmt.Errorf("two different pods exist in the condition: %s vs %s", oldPod.UID, newPod.UID)
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}
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if err := initContainersInvariants(oldPod); err != nil {
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return err
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}
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if err := initContainersInvariants(newPod); err != nil {
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return err
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}
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oldInit, _, _ := initialized(oldPod)
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newInit, _, _ := initialized(newPod)
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if oldInit && !newInit {
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// TODO: we may in the future enable resetting initialized = false if the kubelet needs to restart it
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// from scratch
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return fmt.Errorf("pod cannot be initialized and then regress to not being initialized")
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}
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return nil
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}
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// initialized checks the state of all init containers in the pod.
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func initialized(pod *v1.Pod) (ok bool, failed bool, err error) {
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allInit := true
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initFailed := false
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for _, s := range pod.Status.InitContainerStatuses {
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switch {
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case initFailed && s.State.Waiting == nil:
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return allInit, initFailed, fmt.Errorf("container %s is after a failed container but isn't waiting", s.Name)
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case allInit && s.State.Waiting == nil:
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return allInit, initFailed, fmt.Errorf("container %s is after an initializing container but isn't waiting", s.Name)
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case s.State.Terminated == nil:
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allInit = false
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case s.State.Terminated.ExitCode != 0:
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allInit = false
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initFailed = true
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case !s.Ready:
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return allInit, initFailed, fmt.Errorf("container %s initialized but isn't marked as ready", s.Name)
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}
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}
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return allInit, initFailed, nil
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}
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func initContainersInvariants(pod *v1.Pod) error {
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allInit, initFailed, err := initialized(pod)
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if err != nil {
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return err
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}
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if !allInit || initFailed {
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for _, s := range pod.Status.ContainerStatuses {
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if s.State.Waiting == nil || s.RestartCount != 0 {
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return fmt.Errorf("container %s is not waiting but initialization not complete", s.Name)
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}
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if s.State.Waiting.Reason != "PodInitializing" {
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return fmt.Errorf("container %s should have reason PodInitializing: %s", s.Name, s.State.Waiting.Reason)
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}
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}
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}
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_, c := podutil.GetPodCondition(&pod.Status, v1.PodInitialized)
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if c == nil {
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return fmt.Errorf("pod does not have initialized condition")
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}
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if c.LastTransitionTime.IsZero() {
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return fmt.Errorf("PodInitialized condition should always have a transition time")
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}
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switch {
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case c.Status == v1.ConditionUnknown:
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return fmt.Errorf("PodInitialized condition should never be Unknown")
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case c.Status == v1.ConditionTrue && (initFailed || !allInit):
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return fmt.Errorf("PodInitialized condition was True but all not all containers initialized")
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case c.Status == v1.ConditionFalse && (!initFailed && allInit):
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return fmt.Errorf("PodInitialized condition was False but all containers initialized")
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}
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return nil
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}
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var _ = SIGDescribe("InitContainer [NodeConformance]", func() {
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f := framework.NewDefaultFramework("init-container")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelBaseline
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var podClient *e2epod.PodClient
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ginkgo.BeforeEach(func() {
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podClient = e2epod.NewPodClient(f)
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})
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/*
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Release: v1.12
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Testname: init-container-starts-app-restartnever-pod
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Description: Ensure that all InitContainers are started
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and all containers in pod are voluntarily terminated with exit status 0,
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and the system is not going to restart any of these containers
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when Pod has restart policy as RestartNever.
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*/
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framework.ConformanceIt("should invoke init containers on a RestartNever pod", func(ctx context.Context) {
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ginkgo.By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyNever,
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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{
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Name: "init2",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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},
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},
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}
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framework.Logf("PodSpec: initContainers in spec.initContainers")
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startedPod := podClient.Create(ctx, pod)
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fieldSelector := fields.OneTermEqualSelector("metadata.name", startedPod.Name).String()
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w := &cache.ListWatch{
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WatchFunc: func(options metav1.ListOptions) (i watch.Interface, e error) {
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options.FieldSelector = fieldSelector
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return podClient.Watch(ctx, options)
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},
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}
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var events []watch.Event
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ctx, cancel := watchtools.ContextWithOptionalTimeout(ctx, framework.PodStartTimeout)
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defer cancel()
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event, err := watchtools.Until(ctx, startedPod.ResourceVersion, w,
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recordEvents(events, conditions.PodCompleted),
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)
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framework.ExpectNoError(err)
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checkInvariants(events, containerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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framework.ExpectEqual(endPod.Status.Phase, v1.PodSucceeded)
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_, init := podutil.GetPodCondition(&endPod.Status, v1.PodInitialized)
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gomega.Expect(init).NotTo(gomega.BeNil())
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framework.ExpectEqual(init.Status, v1.ConditionTrue)
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framework.ExpectEqual(len(endPod.Status.InitContainerStatuses), 2)
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for _, status := range endPod.Status.InitContainerStatuses {
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if !status.Ready {
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framework.Failf("init container %s should be in Ready status", status.Name)
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}
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gomega.Expect(status.State.Terminated).NotTo(gomega.BeNil())
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gomega.Expect(status.State.Terminated.ExitCode).To(gomega.BeZero())
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}
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})
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/*
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Release: v1.12
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Testname: init-container-starts-app-restartalways-pod
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Description: Ensure that all InitContainers are started
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and all containers in pod started
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and at least one container is still running or is in the process of being restarted
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when Pod has restart policy as RestartAlways.
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*/
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framework.ConformanceIt("should invoke init containers on a RestartAlways pod", func(ctx context.Context) {
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ginkgo.By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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{
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Name: "init2",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: imageutils.GetPauseImageName(),
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
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},
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},
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},
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},
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},
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}
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framework.Logf("PodSpec: initContainers in spec.initContainers")
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startedPod := podClient.Create(ctx, pod)
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fieldSelector := fields.OneTermEqualSelector("metadata.name", startedPod.Name).String()
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w := &cache.ListWatch{
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WatchFunc: func(options metav1.ListOptions) (i watch.Interface, e error) {
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options.FieldSelector = fieldSelector
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return podClient.Watch(ctx, options)
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},
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}
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var events []watch.Event
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ctx, cancel := watchtools.ContextWithOptionalTimeout(ctx, framework.PodStartTimeout)
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defer cancel()
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event, err := watchtools.Until(ctx, startedPod.ResourceVersion, w, recordEvents(events, conditions.PodRunning))
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framework.ExpectNoError(err)
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checkInvariants(events, containerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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framework.ExpectEqual(endPod.Status.Phase, v1.PodRunning)
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_, init := podutil.GetPodCondition(&endPod.Status, v1.PodInitialized)
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gomega.Expect(init).NotTo(gomega.BeNil())
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framework.ExpectEqual(init.Status, v1.ConditionTrue)
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framework.ExpectEqual(len(endPod.Status.InitContainerStatuses), 2)
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for _, status := range endPod.Status.InitContainerStatuses {
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if !status.Ready {
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framework.Failf("init container %s should be in Ready status", status.Name)
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}
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gomega.Expect(status.State.Terminated).NotTo(gomega.BeNil())
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gomega.Expect(status.State.Terminated.ExitCode).To(gomega.BeZero())
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}
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})
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/*
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Release: v1.12
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Testname: init-container-fails-stops-app-restartalways-pod
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Description: Ensure that app container is not started
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when all InitContainers failed to start
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and Pod has restarted for few occurrences
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and pod has restart policy as RestartAlways.
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*/
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framework.ConformanceIt("should not start app containers if init containers fail on a RestartAlways pod", func(ctx context.Context) {
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ginkgo.By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/false"},
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},
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{
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Name: "init2",
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Image: imageutils.GetE2EImage(imageutils.BusyBox),
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: imageutils.GetPauseImageName(),
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
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},
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},
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},
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},
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},
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}
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framework.Logf("PodSpec: initContainers in spec.initContainers")
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startedPod := podClient.Create(ctx, pod)
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fieldSelector := fields.OneTermEqualSelector("metadata.name", startedPod.Name).String()
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w := &cache.ListWatch{
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WatchFunc: func(options metav1.ListOptions) (i watch.Interface, e error) {
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options.FieldSelector = fieldSelector
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return podClient.Watch(ctx, options)
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},
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}
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var events []watch.Event
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ctx, cancel := watchtools.ContextWithOptionalTimeout(ctx, framework.PodStartTimeout)
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defer cancel()
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event, err := watchtools.Until(
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ctx,
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startedPod.ResourceVersion,
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w,
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// check for the first container to fail at least once
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func(evt watch.Event) (bool, error) {
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switch t := evt.Object.(type) {
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case *v1.Pod:
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for _, status := range t.Status.ContainerStatuses {
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if status.State.Waiting == nil {
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return false, fmt.Errorf("container %q should not be out of waiting: %#v", status.Name, status)
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}
|
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if status.State.Waiting.Reason != "PodInitializing" {
|
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return false, fmt.Errorf("container %q should have reason PodInitializing: %#v", status.Name, status)
|
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}
|
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}
|
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if len(t.Status.InitContainerStatuses) != 2 {
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return false, nil
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}
|
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status := t.Status.InitContainerStatuses[1]
|
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if status.State.Waiting == nil {
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return false, fmt.Errorf("second init container should not be out of waiting: %#v", status)
|
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}
|
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if status.State.Waiting.Reason != "PodInitializing" {
|
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return false, fmt.Errorf("second init container should have reason PodInitializing: %#v", status)
|
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}
|
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status = t.Status.InitContainerStatuses[0]
|
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if status.State.Terminated != nil && status.State.Terminated.ExitCode == 0 {
|
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return false, fmt.Errorf("first init container should have exitCode != 0: %#v", status)
|
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}
|
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// continue until we see an attempt to restart the pod
|
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return status.LastTerminationState.Terminated != nil, nil
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default:
|
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return false, fmt.Errorf("unexpected object: %#v", t)
|
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}
|
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},
|
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// verify we get two restarts
|
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func(evt watch.Event) (bool, error) {
|
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switch t := evt.Object.(type) {
|
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case *v1.Pod:
|
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status := t.Status.InitContainerStatuses[0]
|
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if status.RestartCount < 3 {
|
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return false, nil
|
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}
|
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framework.Logf("init container has failed twice: %#v", t)
|
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// TODO: more conditions
|
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return true, nil
|
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default:
|
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return false, fmt.Errorf("unexpected object: %#v", t)
|
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}
|
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},
|
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)
|
|
framework.ExpectNoError(err)
|
|
|
|
checkInvariants(events, containerInitInvariant)
|
|
endPod := event.Object.(*v1.Pod)
|
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framework.ExpectEqual(endPod.Status.Phase, v1.PodPending)
|
|
_, init := podutil.GetPodCondition(&endPod.Status, v1.PodInitialized)
|
|
gomega.Expect(init).NotTo(gomega.BeNil())
|
|
framework.ExpectEqual(init.Status, v1.ConditionFalse)
|
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framework.ExpectEqual(init.Reason, "ContainersNotInitialized")
|
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framework.ExpectEqual(init.Message, "containers with incomplete status: [init1 init2]")
|
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framework.ExpectEqual(len(endPod.Status.InitContainerStatuses), 2)
|
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})
|
|
|
|
/*
|
|
Release: v1.12
|
|
Testname: init-container-fails-stops-app-restartnever-pod
|
|
Description: Ensure that app container is not started
|
|
when at least one InitContainer fails to start and Pod has restart policy as RestartNever.
|
|
*/
|
|
framework.ConformanceIt("should not start app containers and fail the pod if init containers fail on a RestartNever pod", func(ctx context.Context) {
|
|
ginkgo.By("creating the pod")
|
|
name := "pod-init-" + string(uuid.NewUUID())
|
|
value := strconv.Itoa(time.Now().Nanosecond())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
Labels: map[string]string{
|
|
"name": "foo",
|
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"time": value,
|
|
},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
RestartPolicy: v1.RestartPolicyNever,
|
|
InitContainers: []v1.Container{
|
|
{
|
|
Name: "init1",
|
|
Image: imageutils.GetE2EImage(imageutils.BusyBox),
|
|
Command: []string{"/bin/true"},
|
|
},
|
|
{
|
|
Name: "init2",
|
|
Image: imageutils.GetE2EImage(imageutils.BusyBox),
|
|
Command: []string{"/bin/false"},
|
|
},
|
|
},
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "run1",
|
|
Image: imageutils.GetE2EImage(imageutils.BusyBox),
|
|
Command: []string{"/bin/true"},
|
|
Resources: v1.ResourceRequirements{
|
|
Limits: v1.ResourceList{
|
|
v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
|
|
},
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
framework.Logf("PodSpec: initContainers in spec.initContainers")
|
|
startedPod := podClient.Create(ctx, pod)
|
|
|
|
fieldSelector := fields.OneTermEqualSelector("metadata.name", startedPod.Name).String()
|
|
w := &cache.ListWatch{
|
|
WatchFunc: func(options metav1.ListOptions) (i watch.Interface, e error) {
|
|
options.FieldSelector = fieldSelector
|
|
return podClient.Watch(ctx, options)
|
|
},
|
|
}
|
|
|
|
var events []watch.Event
|
|
ctx, cancel := watchtools.ContextWithOptionalTimeout(ctx, framework.PodStartTimeout)
|
|
defer cancel()
|
|
event, err := watchtools.Until(
|
|
ctx, startedPod.ResourceVersion, w,
|
|
recordEvents(events,
|
|
// check for the second container to fail at least once
|
|
func(evt watch.Event) (bool, error) {
|
|
switch t := evt.Object.(type) {
|
|
case *v1.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 {
|
|
return false, fmt.Errorf("second init container should have failed: %#v", status)
|
|
}
|
|
return true, nil
|
|
default:
|
|
return false, fmt.Errorf("unexpected object: %#v", t)
|
|
}
|
|
}),
|
|
recordEvents(events, conditions.PodCompleted),
|
|
)
|
|
framework.ExpectNoError(err)
|
|
|
|
checkInvariants(events, containerInitInvariant)
|
|
endPod := event.Object.(*v1.Pod)
|
|
|
|
framework.ExpectEqual(endPod.Status.Phase, v1.PodFailed)
|
|
_, init := podutil.GetPodCondition(&endPod.Status, v1.PodInitialized)
|
|
gomega.Expect(init).NotTo(gomega.BeNil())
|
|
framework.ExpectEqual(init.Status, v1.ConditionFalse)
|
|
framework.ExpectEqual(init.Reason, "ContainersNotInitialized")
|
|
framework.ExpectEqual(init.Message, "containers with incomplete status: [init2]")
|
|
framework.ExpectEqual(len(endPod.Status.InitContainerStatuses), 2)
|
|
gomega.Expect(endPod.Status.ContainerStatuses[0].State.Waiting).ToNot(gomega.BeNil())
|
|
})
|
|
})
|