mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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fd459beeff
Rather than testing out for both pod restart and kubelet restart, we change the tests to just handle pod restart scenario. Clarify the test purpose and add extra check to tighten the test. We would be adding additional tests to cover kubelet restart scenarios in subsequent commits. Signed-off-by: Swati Sehgal <swsehgal@redhat.com> Signed-off-by: Francesco Romani <fromani@redhat.com>
430 lines
19 KiB
Go
430 lines
19 KiB
Go
/*
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Copyright 2017 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 e2enode
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import (
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"context"
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"fmt"
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"path/filepath"
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"regexp"
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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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appsv1 "k8s.io/api/apps/v1"
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/apimachinery/pkg/util/sets"
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kubeletdevicepluginv1beta1 "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
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admissionapi "k8s.io/pod-security-admission/api"
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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/util/uuid"
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kubeletpodresourcesv1 "k8s.io/kubelet/pkg/apis/podresources/v1"
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kubeletpodresourcesv1alpha1 "k8s.io/kubelet/pkg/apis/podresources/v1alpha1"
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"k8s.io/kubernetes/test/e2e/framework"
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e2enode "k8s.io/kubernetes/test/e2e/framework/node"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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)
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var (
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appsScheme = runtime.NewScheme()
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appsCodecs = serializer.NewCodecFactory(appsScheme)
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)
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// Serial because the test restarts Kubelet
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var _ = SIGDescribe("Device Plugin [Feature:DevicePluginProbe][NodeFeature:DevicePluginProbe][Serial]", func() {
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f := framework.NewDefaultFramework("device-plugin-errors")
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f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
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testDevicePlugin(f, kubeletdevicepluginv1beta1.DevicePluginPath)
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})
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// readDaemonSetV1OrDie reads daemonset object from bytes. Panics on error.
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func readDaemonSetV1OrDie(objBytes []byte) *appsv1.DaemonSet {
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appsv1.AddToScheme(appsScheme)
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requiredObj, err := runtime.Decode(appsCodecs.UniversalDecoder(appsv1.SchemeGroupVersion), objBytes)
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if err != nil {
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panic(err)
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}
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return requiredObj.(*appsv1.DaemonSet)
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}
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const (
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// TODO(vikasc): Instead of hard-coding number of devices, provide number of devices in the sample-device-plugin using configmap
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// and then use the same here
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expectedSampleDevsAmount int64 = 2
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)
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func testDevicePlugin(f *framework.Framework, pluginSockDir string) {
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pluginSockDir = filepath.Join(pluginSockDir) + "/"
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ginkgo.Context("DevicePlugin [Serial] [Disruptive]", func() {
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var devicePluginPod, dptemplate *v1.Pod
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var v1alphaPodResources *kubeletpodresourcesv1alpha1.ListPodResourcesResponse
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var v1PodResources *kubeletpodresourcesv1.ListPodResourcesResponse
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var err error
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ginkgo.BeforeEach(func(ctx context.Context) {
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ginkgo.By("Wait for node to be ready")
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gomega.Eventually(ctx, func(ctx context.Context) bool {
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nodes, err := e2enode.TotalReady(ctx, f.ClientSet)
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framework.ExpectNoError(err)
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return nodes == 1
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}, time.Minute, time.Second).Should(gomega.BeTrue())
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// Before we run the device plugin test, we need to ensure
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// that the cluster is in a clean state and there are no
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// pods running on this node.
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// This is done in a gomega.Eventually with retries since a prior test in a different test suite could've run and the deletion of it's resources may still be in progress.
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// xref: https://issue.k8s.io/115381
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gomega.Eventually(ctx, func(ctx context.Context) error {
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v1alphaPodResources, err = getV1alpha1NodeDevices(ctx)
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if err != nil {
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return fmt.Errorf("failed to get node local podresources by accessing the (v1alpha) podresources API endpoint: %v", err)
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}
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v1PodResources, err = getV1NodeDevices(ctx)
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if err != nil {
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return fmt.Errorf("failed to get node local podresources by accessing the (v1) podresources API endpoint: %v", err)
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}
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if len(v1alphaPodResources.PodResources) > 0 {
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return fmt.Errorf("expected v1alpha pod resources to be empty, but got non-empty resources: %+v", v1alphaPodResources.PodResources)
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}
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if len(v1PodResources.PodResources) > 0 {
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return fmt.Errorf("expected v1 pod resources to be empty, but got non-empty resources: %+v", v1PodResources.PodResources)
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}
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return nil
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}, f.Timeouts.PodDelete, f.Timeouts.Poll).Should(gomega.Succeed())
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ginkgo.By("Scheduling a sample device plugin pod")
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dp := getSampleDevicePluginPod(pluginSockDir)
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dptemplate = dp.DeepCopy()
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devicePluginPod = e2epod.NewPodClient(f).CreateSync(ctx, dp)
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ginkgo.By("Waiting for devices to become available on the local node")
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gomega.Eventually(ctx, func(ctx context.Context) bool {
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node, ready := getLocalTestNode(ctx, f)
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return ready && CountSampleDeviceCapacity(node) > 0
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}, 5*time.Minute, framework.Poll).Should(gomega.BeTrue())
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framework.Logf("Successfully created device plugin pod")
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ginkgo.By(fmt.Sprintf("Waiting for the resource exported by the sample device plugin to become available on the local node (instances: %d)", expectedSampleDevsAmount))
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gomega.Eventually(ctx, func(ctx context.Context) bool {
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node, ready := getLocalTestNode(ctx, f)
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return ready &&
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CountSampleDeviceCapacity(node) == expectedSampleDevsAmount &&
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CountSampleDeviceAllocatable(node) == expectedSampleDevsAmount
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}, 30*time.Second, framework.Poll).Should(gomega.BeTrue())
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})
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ginkgo.AfterEach(func(ctx context.Context) {
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ginkgo.By("Deleting the device plugin pod")
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e2epod.NewPodClient(f).DeleteSync(ctx, devicePluginPod.Name, metav1.DeleteOptions{}, time.Minute)
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ginkgo.By("Deleting any Pods created by the test")
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l, err := e2epod.NewPodClient(f).List(ctx, metav1.ListOptions{})
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framework.ExpectNoError(err)
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for _, p := range l.Items {
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if p.Namespace != f.Namespace.Name {
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continue
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}
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framework.Logf("Deleting pod: %s", p.Name)
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e2epod.NewPodClient(f).DeleteSync(ctx, p.Name, metav1.DeleteOptions{}, 2*time.Minute)
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}
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restartKubelet(true)
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ginkgo.By("Waiting for devices to become unavailable on the local node")
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gomega.Eventually(ctx, func(ctx context.Context) bool {
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node, ready := getLocalTestNode(ctx, f)
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return ready && CountSampleDeviceCapacity(node) <= 0
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}, 5*time.Minute, framework.Poll).Should(gomega.BeTrue())
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ginkgo.By("devices now unavailable on the local node")
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})
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ginkgo.It("Can schedule a pod that requires a device", func(ctx context.Context) {
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podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
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pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
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deviceIDRE := "stub devices: (Dev-[0-9]+)"
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devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
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gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")), "pod1 requested a device but started successfully without")
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v1alphaPodResources, err = getV1alpha1NodeDevices(ctx)
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framework.ExpectNoError(err)
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v1PodResources, err = getV1NodeDevices(ctx)
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framework.ExpectNoError(err)
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framework.Logf("v1alphaPodResources.PodResources:%+v\n", v1alphaPodResources.PodResources)
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framework.Logf("v1PodResources.PodResources:%+v\n", v1PodResources.PodResources)
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framework.Logf("len(v1alphaPodResources.PodResources):%+v", len(v1alphaPodResources.PodResources))
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framework.Logf("len(v1PodResources.PodResources):%+v", len(v1PodResources.PodResources))
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framework.ExpectEqual(len(v1alphaPodResources.PodResources), 2)
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framework.ExpectEqual(len(v1PodResources.PodResources), 2)
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var v1alphaResourcesForOurPod *kubeletpodresourcesv1alpha1.PodResources
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for _, res := range v1alphaPodResources.GetPodResources() {
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if res.Name == pod1.Name {
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v1alphaResourcesForOurPod = res
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}
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}
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var v1ResourcesForOurPod *kubeletpodresourcesv1.PodResources
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for _, res := range v1PodResources.GetPodResources() {
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if res.Name == pod1.Name {
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v1ResourcesForOurPod = res
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}
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}
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gomega.Expect(v1alphaResourcesForOurPod).NotTo(gomega.BeNil())
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gomega.Expect(v1ResourcesForOurPod).NotTo(gomega.BeNil())
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framework.ExpectEqual(v1alphaResourcesForOurPod.Name, pod1.Name)
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framework.ExpectEqual(v1ResourcesForOurPod.Name, pod1.Name)
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framework.ExpectEqual(v1alphaResourcesForOurPod.Namespace, pod1.Namespace)
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framework.ExpectEqual(v1ResourcesForOurPod.Namespace, pod1.Namespace)
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framework.ExpectEqual(len(v1alphaResourcesForOurPod.Containers), 1)
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framework.ExpectEqual(len(v1ResourcesForOurPod.Containers), 1)
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framework.ExpectEqual(v1alphaResourcesForOurPod.Containers[0].Name, pod1.Spec.Containers[0].Name)
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framework.ExpectEqual(v1ResourcesForOurPod.Containers[0].Name, pod1.Spec.Containers[0].Name)
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framework.ExpectEqual(len(v1alphaResourcesForOurPod.Containers[0].Devices), 1)
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framework.ExpectEqual(len(v1ResourcesForOurPod.Containers[0].Devices), 1)
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framework.ExpectEqual(v1alphaResourcesForOurPod.Containers[0].Devices[0].ResourceName, SampleDeviceResourceName)
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framework.ExpectEqual(v1ResourcesForOurPod.Containers[0].Devices[0].ResourceName, SampleDeviceResourceName)
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framework.ExpectEqual(len(v1alphaResourcesForOurPod.Containers[0].Devices[0].DeviceIds), 1)
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framework.ExpectEqual(len(v1ResourcesForOurPod.Containers[0].Devices[0].DeviceIds), 1)
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})
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// simulate container restart, while all other involved components (kubelet, device plugin) stay stable. To do so, in the container
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// entry point we sleep for a limited and short period of time. The device assignment should be kept and be stable across the container
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// restarts. For the sake of brevity we however check just the fist restart.
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ginkgo.It("Keeps device plugin assignments across pod restarts (no kubelet restart, device plugin re-registration)", func(ctx context.Context) {
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podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
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pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
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deviceIDRE := "stub devices: (Dev-[0-9]+)"
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devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
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gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")), "pod1 requested a device but started successfully without")
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pod1, err = e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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ginkgo.By("Waiting for container to restart")
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ensurePodContainerRestart(ctx, f, pod1.Name, pod1.Name)
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// check from the device assignment is preserved and stable from perspective of the container
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ginkgo.By("Confirming that after a container restart, fake-device assignment is kept")
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devIDRestart1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
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framework.ExpectEqual(devIDRestart1, devID1)
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// crosscheck from the device assignment is preserved and stable from perspective of the kubelet.
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// needs to match the container perspective.
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ginkgo.By("Verifying the device assignment after container restart using podresources API")
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v1PodResources, err = getV1NodeDevices(ctx)
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if err != nil {
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framework.ExpectNoError(err, "getting pod resources assignment after pod restart")
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}
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err = checkPodResourcesAssignment(v1PodResources, pod1.Namespace, pod1.Name, pod1.Spec.Containers[0].Name, SampleDeviceResourceName, []string{devID1})
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framework.ExpectNoError(err, "inconsistent device assignment after pod restart")
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ginkgo.By("Creating another pod")
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pod2 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
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err = e2epod.WaitTimeoutForPodRunningInNamespace(ctx, f.ClientSet, pod2.Name, f.Namespace.Name, 1*time.Minute)
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framework.ExpectNoError(err)
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ginkgo.By("Checking that pod got a fake device")
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devID2, err := parseLog(ctx, f, pod2.Name, pod2.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod2.Name)
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gomega.Expect(devID2).To(gomega.Not(gomega.Equal("")), "pod2 requested a device but started successfully without")
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ginkgo.By("Verifying the device assignment after extra container start using podresources API")
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v1PodResources, err = getV1NodeDevices(ctx)
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if err != nil {
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framework.ExpectNoError(err, "getting pod resources assignment after pod restart")
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}
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err = checkPodResourcesAssignment(v1PodResources, pod1.Namespace, pod1.Name, pod1.Spec.Containers[0].Name, SampleDeviceResourceName, []string{devID1})
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framework.ExpectNoError(err, "inconsistent device assignment after extra container restart - pod1")
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err = checkPodResourcesAssignment(v1PodResources, pod2.Namespace, pod2.Name, pod2.Spec.Containers[0].Name, SampleDeviceResourceName, []string{devID2})
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framework.ExpectNoError(err, "inconsistent device assignment after extra container restart - pod2")
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})
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ginkgo.It("Keeps device plugin assignments after the device plugin has been re-registered", func(ctx context.Context) {
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podRECMD := "devs=$(ls /tmp/ | egrep '^Dev-[0-9]+$') && echo stub devices: $devs && sleep 60"
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pod1 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
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deviceIDRE := "stub devices: (Dev-[0-9]+)"
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devID1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
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gomega.Expect(devID1).To(gomega.Not(gomega.Equal("")), "pod1 requested a device but started successfully without")
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pod1, err = e2epod.NewPodClient(f).Get(ctx, pod1.Name, metav1.GetOptions{})
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framework.ExpectNoError(err)
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ginkgo.By("Restarting Kubelet")
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restartKubelet(true)
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ginkgo.By("Wait for node to be ready again")
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e2enode.WaitForAllNodesSchedulable(ctx, f.ClientSet, 5*time.Minute)
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ginkgo.By("Re-Register resources and delete the plugin pod")
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gp := int64(0)
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deleteOptions := metav1.DeleteOptions{
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GracePeriodSeconds: &gp,
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}
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e2epod.NewPodClient(f).DeleteSync(ctx, devicePluginPod.Name, deleteOptions, time.Minute)
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waitForContainerRemoval(ctx, devicePluginPod.Spec.Containers[0].Name, devicePluginPod.Name, devicePluginPod.Namespace)
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ginkgo.By("Recreating the plugin pod")
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devicePluginPod = e2epod.NewPodClient(f).CreateSync(ctx, dptemplate)
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ginkgo.By("Confirming that after a kubelet and pod restart, fake-device assignment is kept")
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ensurePodContainerRestart(ctx, f, pod1.Name, pod1.Name)
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devIDRestart1, err := parseLog(ctx, f, pod1.Name, pod1.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod1.Name)
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framework.ExpectEqual(devIDRestart1, devID1)
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ginkgo.By("Waiting for resource to become available on the local node after re-registration")
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gomega.Eventually(ctx, func() bool {
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node, ready := getLocalTestNode(ctx, f)
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return ready &&
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CountSampleDeviceCapacity(node) == expectedSampleDevsAmount &&
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CountSampleDeviceAllocatable(node) == expectedSampleDevsAmount
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}, 30*time.Second, framework.Poll).Should(gomega.BeTrue())
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ginkgo.By("Creating another pod")
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pod2 := e2epod.NewPodClient(f).CreateSync(ctx, makeBusyboxPod(SampleDeviceResourceName, podRECMD))
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ginkgo.By("Checking that pod got a different fake device")
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devID2, err := parseLog(ctx, f, pod2.Name, pod2.Name, deviceIDRE)
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framework.ExpectNoError(err, "getting logs for pod %q", pod2.Name)
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gomega.Expect(devID1).To(gomega.Not(gomega.Equal(devID2)), "pod2 requested a device but started successfully without")
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})
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})
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}
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// makeBusyboxPod returns a simple Pod spec with a busybox container
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// that requests SampleDeviceResourceName and runs the specified command.
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func makeBusyboxPod(SampleDeviceResourceName, cmd string) *v1.Pod {
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podName := "device-plugin-test-" + string(uuid.NewUUID())
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rl := v1.ResourceList{v1.ResourceName(SampleDeviceResourceName): *resource.NewQuantity(1, resource.DecimalSI)}
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return &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{Name: podName},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyAlways,
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Containers: []v1.Container{{
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Image: busyboxImage,
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Name: podName,
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// Runs the specified command in the test pod.
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Command: []string{"sh", "-c", cmd},
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Resources: v1.ResourceRequirements{
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Limits: rl,
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Requests: rl,
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},
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}},
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},
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}
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}
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// ensurePodContainerRestart confirms that pod container has restarted at least once
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func ensurePodContainerRestart(ctx context.Context, f *framework.Framework, podName string, contName string) {
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var initialCount int32
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var currentCount int32
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p, err := e2epod.NewPodClient(f).Get(ctx, podName, metav1.GetOptions{})
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if err != nil || len(p.Status.ContainerStatuses) < 1 {
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framework.Failf("ensurePodContainerRestart failed for pod %q: %v", podName, err)
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}
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initialCount = p.Status.ContainerStatuses[0].RestartCount
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gomega.Eventually(ctx, func() bool {
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p, err = e2epod.NewPodClient(f).Get(ctx, podName, metav1.GetOptions{})
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if err != nil || len(p.Status.ContainerStatuses) < 1 {
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return false
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}
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currentCount = p.Status.ContainerStatuses[0].RestartCount
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framework.Logf("initial %v, current %v", initialCount, currentCount)
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return currentCount > initialCount
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}, 5*time.Minute, framework.Poll).Should(gomega.BeTrue())
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}
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// parseLog returns the matching string for the specified regular expression parsed from the container logs.
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func parseLog(ctx context.Context, f *framework.Framework, podName string, contName string, re string) (string, error) {
|
|
logs, err := e2epod.GetPodLogs(ctx, f.ClientSet, f.Namespace.Name, podName, contName)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
framework.Logf("got pod logs: %v", logs)
|
|
regex := regexp.MustCompile(re)
|
|
matches := regex.FindStringSubmatch(logs)
|
|
if len(matches) < 2 {
|
|
return "", fmt.Errorf("unexpected match in logs: %q", logs)
|
|
}
|
|
|
|
return matches[1], nil
|
|
}
|
|
|
|
func checkPodResourcesAssignment(v1PodRes *kubeletpodresourcesv1.ListPodResourcesResponse, podNamespace, podName, containerName, resourceName string, devs []string) error {
|
|
for _, podRes := range v1PodRes.PodResources {
|
|
if podRes.Namespace != podNamespace || podRes.Name != podName {
|
|
continue
|
|
}
|
|
for _, contRes := range podRes.Containers {
|
|
if contRes.Name != containerName {
|
|
continue
|
|
}
|
|
return matchContainerDevices(podNamespace+"/"+podName+"/"+containerName, contRes.Devices, resourceName, devs)
|
|
}
|
|
}
|
|
return fmt.Errorf("no resources found for %s/%s/%s", podNamespace, podName, containerName)
|
|
}
|
|
|
|
func matchContainerDevices(ident string, contDevs []*kubeletpodresourcesv1.ContainerDevices, resourceName string, devs []string) error {
|
|
expected := sets.New[string](devs...)
|
|
assigned := sets.New[string]()
|
|
for _, contDev := range contDevs {
|
|
if contDev.ResourceName != resourceName {
|
|
continue
|
|
}
|
|
assigned = assigned.Insert(contDev.DeviceIds...)
|
|
}
|
|
expectedStr := strings.Join(expected.UnsortedList(), ",")
|
|
assignedStr := strings.Join(assigned.UnsortedList(), ",")
|
|
framework.Logf("%s: devices expected %q assigned %q", ident, expectedStr, assignedStr)
|
|
if !assigned.Equal(expected) {
|
|
return fmt.Errorf("device allocation mismatch for %s expected %s assigned %s", ident, expectedStr, assignedStr)
|
|
}
|
|
return nil
|
|
}
|