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https://github.com/k3s-io/kubernetes.git
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303 lines
10 KiB
Go
303 lines
10 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 e2e_node
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import (
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"strings"
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"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/util/uuid"
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"k8s.io/kubernetes/pkg/kubelet/cm"
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"k8s.io/kubernetes/test/e2e/framework"
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imageutils "k8s.io/kubernetes/test/utils/image"
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"github.com/golang/glog"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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// getResourceList returns a ResourceList with the
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// specified cpu and memory resource values
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func getResourceList(cpu, memory string) v1.ResourceList {
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res := v1.ResourceList{}
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if cpu != "" {
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res[v1.ResourceCPU] = resource.MustParse(cpu)
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}
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if memory != "" {
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res[v1.ResourceMemory] = resource.MustParse(memory)
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}
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return res
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}
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// getResourceRequirements returns a ResourceRequirements object
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func getResourceRequirements(requests, limits v1.ResourceList) v1.ResourceRequirements {
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res := v1.ResourceRequirements{}
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res.Requests = requests
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res.Limits = limits
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return res
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}
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const (
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// Kubelet internal cgroup name for burstable tier
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burstableCgroup = "burstable"
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// Kubelet internal cgroup name for besteffort tier
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bestEffortCgroup = "besteffort"
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)
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// makePodToVerifyCgroups returns a pod that verifies the existence of the specified cgroups.
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func makePodToVerifyCgroups(cgroupNames []string) *v1.Pod {
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// convert the names to their literal cgroupfs forms...
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cgroupFsNames := []string{}
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rootCgroupName := cm.NewCgroupName(cm.RootCgroupName, defaultNodeAllocatableCgroup)
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for _, baseName := range cgroupNames {
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// Add top level cgroup used to enforce node allocatable.
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cgroupComponents := strings.Split(baseName, "/")
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cgroupName := cm.NewCgroupName(rootCgroupName, cgroupComponents...)
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cgroupFsNames = append(cgroupFsNames, toCgroupFsName(cgroupName))
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}
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glog.Infof("expecting %v cgroups to be found", cgroupFsNames)
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// build the pod command to either verify cgroups exist
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command := ""
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for _, cgroupFsName := range cgroupFsNames {
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localCommand := "if [ ! -d /tmp/memory/" + cgroupFsName + " ] || [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 1; fi; "
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command += localCommand
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}
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod" + string(uuid.NewUUID()),
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyNever,
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Containers: []v1.Container{
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{
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Image: busyboxImage,
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Name: "container" + string(uuid.NewUUID()),
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Command: []string{"sh", "-c", command},
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "sysfscgroup",
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MountPath: "/tmp",
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},
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},
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},
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},
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Volumes: []v1.Volume{
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{
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Name: "sysfscgroup",
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{Path: "/sys/fs/cgroup"},
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},
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},
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},
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},
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}
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return pod
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}
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// makePodToVerifyCgroupRemoved verfies the specified cgroup does not exist.
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func makePodToVerifyCgroupRemoved(baseName string) *v1.Pod {
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components := strings.Split(baseName, "/")
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cgroupName := cm.NewCgroupName(cm.RootCgroupName, components...)
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cgroupFsName := toCgroupFsName(cgroupName)
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod" + string(uuid.NewUUID()),
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyOnFailure,
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Containers: []v1.Container{
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{
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Image: busyboxImage,
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Name: "container" + string(uuid.NewUUID()),
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Command: []string{"sh", "-c", "for i in `seq 1 10`; do if [ ! -d /tmp/memory/" + cgroupFsName + " ] && [ ! -d /tmp/cpu/" + cgroupFsName + " ]; then exit 0; else sleep 10; fi; done; exit 1"},
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VolumeMounts: []v1.VolumeMount{
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{
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Name: "sysfscgroup",
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MountPath: "/tmp",
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},
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},
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},
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},
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Volumes: []v1.Volume{
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{
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Name: "sysfscgroup",
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VolumeSource: v1.VolumeSource{
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HostPath: &v1.HostPathVolumeSource{Path: "/sys/fs/cgroup"},
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},
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},
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},
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},
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}
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return pod
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}
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var _ = framework.KubeDescribe("Kubelet Cgroup Manager", func() {
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f := framework.NewDefaultFramework("kubelet-cgroup-manager")
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Describe("QOS containers", func() {
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Context("On enabling QOS cgroup hierarchy", func() {
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It("Top level QoS containers should have been created [NodeConformance]", func() {
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if !framework.TestContext.KubeletConfig.CgroupsPerQOS {
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return
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}
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cgroupsToVerify := []string{burstableCgroup, bestEffortCgroup}
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pod := makePodToVerifyCgroups(cgroupsToVerify)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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})
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})
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Describe("Pod containers [NodeConformance]", func() {
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Context("On scheduling a Guaranteed Pod", func() {
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It("Pod containers should have been created under the cgroup-root", func() {
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if !framework.TestContext.KubeletConfig.CgroupsPerQOS {
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return
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}
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var (
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guaranteedPod *v1.Pod
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podUID string
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)
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By("Creating a Guaranteed pod in Namespace", func() {
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guaranteedPod = f.PodClient().Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod" + string(uuid.NewUUID()),
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Namespace: f.Namespace.Name,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Image: imageutils.GetPauseImageName(),
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Name: "container" + string(uuid.NewUUID()),
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Resources: getResourceRequirements(getResourceList("100m", "100Mi"), getResourceList("100m", "100Mi")),
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},
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},
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},
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})
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podUID = string(guaranteedPod.UID)
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})
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By("Checking if the pod cgroup was created", func() {
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cgroupsToVerify := []string{"pod" + podUID}
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pod := makePodToVerifyCgroups(cgroupsToVerify)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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By("Checking if the pod cgroup was deleted", func() {
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gp := int64(1)
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Expect(f.PodClient().Delete(guaranteedPod.Name, &metav1.DeleteOptions{GracePeriodSeconds: &gp})).NotTo(HaveOccurred())
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pod := makePodToVerifyCgroupRemoved("pod" + podUID)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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})
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})
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Context("On scheduling a BestEffort Pod", func() {
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It("Pod containers should have been created under the BestEffort cgroup", func() {
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if !framework.TestContext.KubeletConfig.CgroupsPerQOS {
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return
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}
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var (
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podUID string
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bestEffortPod *v1.Pod
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)
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By("Creating a BestEffort pod in Namespace", func() {
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bestEffortPod = f.PodClient().Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod" + string(uuid.NewUUID()),
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Namespace: f.Namespace.Name,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Image: imageutils.GetPauseImageName(),
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Name: "container" + string(uuid.NewUUID()),
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Resources: getResourceRequirements(getResourceList("", ""), getResourceList("", "")),
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},
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},
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},
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})
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podUID = string(bestEffortPod.UID)
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})
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By("Checking if the pod cgroup was created", func() {
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cgroupsToVerify := []string{"besteffort/pod" + podUID}
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pod := makePodToVerifyCgroups(cgroupsToVerify)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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By("Checking if the pod cgroup was deleted", func() {
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gp := int64(1)
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Expect(f.PodClient().Delete(bestEffortPod.Name, &metav1.DeleteOptions{GracePeriodSeconds: &gp})).NotTo(HaveOccurred())
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pod := makePodToVerifyCgroupRemoved("besteffort/pod" + podUID)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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})
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})
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Context("On scheduling a Burstable Pod", func() {
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It("Pod containers should have been created under the Burstable cgroup", func() {
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if !framework.TestContext.KubeletConfig.CgroupsPerQOS {
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return
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}
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var (
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podUID string
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burstablePod *v1.Pod
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)
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By("Creating a Burstable pod in Namespace", func() {
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burstablePod = f.PodClient().Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "pod" + string(uuid.NewUUID()),
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Namespace: f.Namespace.Name,
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Image: imageutils.GetPauseImageName(),
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Name: "container" + string(uuid.NewUUID()),
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Resources: getResourceRequirements(getResourceList("100m", "100Mi"), getResourceList("200m", "200Mi")),
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},
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},
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},
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})
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podUID = string(burstablePod.UID)
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})
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By("Checking if the pod cgroup was created", func() {
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cgroupsToVerify := []string{"burstable/pod" + podUID}
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pod := makePodToVerifyCgroups(cgroupsToVerify)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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By("Checking if the pod cgroup was deleted", func() {
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gp := int64(1)
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Expect(f.PodClient().Delete(burstablePod.Name, &metav1.DeleteOptions{GracePeriodSeconds: &gp})).NotTo(HaveOccurred())
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pod := makePodToVerifyCgroupRemoved("burstable/pod" + podUID)
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f.PodClient().Create(pod)
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err := framework.WaitForPodSuccessInNamespace(f.ClientSet, pod.Name, f.Namespace.Name)
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Expect(err).NotTo(HaveOccurred())
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})
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})
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})
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})
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})
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