mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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246 lines
7.8 KiB
Go
246 lines
7.8 KiB
Go
// +build linux
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/*
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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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"fmt"
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"os/exec"
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"path"
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"strconv"
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"strings"
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"time"
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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/sets"
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"k8s.io/apimachinery/pkg/util/uuid"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/test/e2e/framework"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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func getOOMScoreForPid(pid int) (int, error) {
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procfsPath := path.Join("/proc", strconv.Itoa(pid), "oom_score_adj")
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out, err := exec.Command("sudo", "cat", procfsPath).CombinedOutput()
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if err != nil {
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return 0, err
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}
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return strconv.Atoi(strings.TrimSpace(string(out)))
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}
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func validateOOMScoreAdjSetting(pid int, expectedOOMScoreAdj int) error {
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oomScore, err := getOOMScoreForPid(pid)
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if err != nil {
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return fmt.Errorf("failed to get oom_score_adj for %d: %v", pid, err)
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}
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if expectedOOMScoreAdj != oomScore {
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return fmt.Errorf("expected pid %d's oom_score_adj to be %d; found %d", pid, expectedOOMScoreAdj, oomScore)
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}
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return nil
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}
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func validateOOMScoreAdjSettingIsInRange(pid int, expectedMinOOMScoreAdj, expectedMaxOOMScoreAdj int) error {
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oomScore, err := getOOMScoreForPid(pid)
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if err != nil {
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return fmt.Errorf("failed to get oom_score_adj for %d", pid)
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}
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if oomScore < expectedMinOOMScoreAdj {
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return fmt.Errorf("expected pid %d's oom_score_adj to be >= %d; found %d", pid, expectedMinOOMScoreAdj, oomScore)
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}
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if oomScore < expectedMaxOOMScoreAdj {
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return fmt.Errorf("expected pid %d's oom_score_adj to be < %d; found %d", pid, expectedMaxOOMScoreAdj, oomScore)
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}
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return nil
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}
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var _ = framework.KubeDescribe("Container Manager Misc [Serial]", func() {
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f := framework.NewDefaultFramework("kubelet-container-manager")
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Describe("Validate OOM score adjustments", func() {
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Context("once the node is setup", func() {
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It("docker daemon's oom-score-adj should be -999", func() {
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dockerPids, err := getPidsForProcess(dockerProcessName, dockerPidFile)
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Expect(err).To(BeNil(), "failed to get list of docker daemon pids")
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for _, pid := range dockerPids {
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Eventually(func() error {
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return validateOOMScoreAdjSetting(pid, -999)
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}, 5*time.Minute, 30*time.Second).Should(BeNil())
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}
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})
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It("Kubelet's oom-score-adj should be -999", func() {
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kubeletPids, err := getPidsForProcess(kubeletProcessName, "")
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Expect(err).To(BeNil(), "failed to get list of kubelet pids")
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Expect(len(kubeletPids)).To(Equal(1), "expected only one kubelet process; found %d", len(kubeletPids))
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Eventually(func() error {
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return validateOOMScoreAdjSetting(kubeletPids[0], -999)
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}, 5*time.Minute, 30*time.Second).Should(BeNil())
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})
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Context("", func() {
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It("pod infra containers oom-score-adj should be -998 and best effort container's should be 1000", func() {
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// Take a snapshot of existing pause processes. These were
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// created before this test, and may not be infra
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// containers. They should be excluded from the test.
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existingPausePIDs, err := getPidsForProcess("pause", "")
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Expect(err).To(BeNil(), "failed to list all pause processes on the node")
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existingPausePIDSet := sets.NewInt(existingPausePIDs...)
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podClient := f.PodClient()
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podName := "besteffort" + string(uuid.NewUUID())
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podClient.Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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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: framework.ServeHostnameImage,
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Name: podName,
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},
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},
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},
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})
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var pausePids []int
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By("checking infra container's oom-score-adj")
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Eventually(func() error {
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pausePids, err = getPidsForProcess("pause", "")
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if err != nil {
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return fmt.Errorf("failed to get list of pause pids: %v", err)
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}
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for _, pid := range pausePids {
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if existingPausePIDSet.Has(pid) {
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// Not created by this test. Ignore it.
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continue
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}
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if err := validateOOMScoreAdjSetting(pid, -998); err != nil {
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return err
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}
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}
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return nil
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}, 2*time.Minute, time.Second*4).Should(BeNil())
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var shPids []int
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By("checking besteffort container's oom-score-adj")
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Eventually(func() error {
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shPids, err = getPidsForProcess("serve_hostname", "")
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if err != nil {
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return fmt.Errorf("failed to get list of serve hostname process pids: %v", err)
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}
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if len(shPids) != 1 {
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return fmt.Errorf("expected only one serve_hostname process; found %d", len(shPids))
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}
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return validateOOMScoreAdjSetting(shPids[0], 1000)
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}, 2*time.Minute, time.Second*4).Should(BeNil())
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})
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// Log the running containers here to help debugging. Use `docker ps`
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// directly for now because the test is already docker specific.
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AfterEach(func() {
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if CurrentGinkgoTestDescription().Failed {
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By("Dump all running docker containers")
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output, err := exec.Command("docker", "ps").CombinedOutput()
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Expect(err).NotTo(HaveOccurred())
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framework.Logf("Running docker containers:\n%s", string(output))
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}
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})
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})
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It("guaranteed container's oom-score-adj should be -998", func() {
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podClient := f.PodClient()
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podName := "guaranteed" + string(uuid.NewUUID())
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podClient.Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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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: "gcr.io/google_containers/nginx-slim:0.7",
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Name: podName,
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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"cpu": resource.MustParse("100m"),
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"memory": resource.MustParse("50Mi"),
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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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var (
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ngPids []int
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err error
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)
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Eventually(func() error {
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ngPids, err = getPidsForProcess("nginx", "")
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if err != nil {
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return fmt.Errorf("failed to get list of nginx process pids: %v", err)
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}
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for _, pid := range ngPids {
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if err := validateOOMScoreAdjSetting(pid, -998); err != nil {
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return err
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}
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}
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return nil
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}, 2*time.Minute, time.Second*4).Should(BeNil())
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})
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It("burstable container's oom-score-adj should be between [2, 1000)", func() {
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podClient := f.PodClient()
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podName := "burstable" + string(uuid.NewUUID())
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podClient.Create(&v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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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: "gcr.io/google_containers/test-webserver:e2e",
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Name: podName,
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Resources: v1.ResourceRequirements{
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Requests: v1.ResourceList{
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"cpu": resource.MustParse("100m"),
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"memory": resource.MustParse("50Mi"),
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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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var (
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wsPids []int
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err error
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)
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Eventually(func() error {
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wsPids, err = getPidsForProcess("test-webserver", "")
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if err != nil {
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return fmt.Errorf("failed to get list of test-webserver process pids: %v", err)
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}
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for _, pid := range wsPids {
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if err := validateOOMScoreAdjSettingIsInRange(pid, 2, 1000); err != nil {
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return err
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}
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}
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return nil
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}, 2*time.Minute, time.Second*4).Should(BeNil())
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// TODO: Test the oom-score-adj logic for burstable more accurately.
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})
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})
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})
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})
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