7fcdbbef06
- We use the new v22 module released on May 10 - We drop the unmaintained `github.com/coreos/pkg` Signed-off-by: Davanum Srinivas <davanum@gmail.com>
475 lines
19 KiB
Go
475 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 e2enode
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import (
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"fmt"
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"io/ioutil"
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"os/exec"
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"strings"
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"time"
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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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kubeletstatsv1alpha1 "k8s.io/kubelet/pkg/apis/stats/v1alpha1"
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"k8s.io/kubernetes/test/e2e/framework"
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e2ekubectl "k8s.io/kubernetes/test/e2e/framework/kubectl"
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e2evolume "k8s.io/kubernetes/test/e2e/framework/volume"
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systemdutil "github.com/coreos/go-systemd/v22/util"
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"github.com/onsi/ginkgo"
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"github.com/onsi/gomega"
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"github.com/onsi/gomega/gstruct"
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"github.com/onsi/gomega/types"
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)
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var _ = SIGDescribe("Summary API [NodeConformance]", func() {
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f := framework.NewDefaultFramework("summary-test")
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ginkgo.Context("when querying /stats/summary", func() {
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ginkgo.AfterEach(func() {
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if !ginkgo.CurrentGinkgoTestDescription().Failed {
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return
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}
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if framework.TestContext.DumpLogsOnFailure {
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e2ekubectl.LogFailedContainers(f.ClientSet, f.Namespace.Name, framework.Logf)
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}
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ginkgo.By("Recording processes in system cgroups")
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recordSystemCgroupProcesses()
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})
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ginkgo.It("should report resource usage through the stats api", func() {
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const pod0 = "stats-busybox-0"
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const pod1 = "stats-busybox-1"
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ginkgo.By("Creating test pods")
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numRestarts := int32(1)
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pods := getSummaryTestPods(f, numRestarts, pod0, pod1)
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f.PodClient().CreateBatch(pods)
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ginkgo.By("restarting the containers to ensure container metrics are still being gathered after a container is restarted")
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gomega.Eventually(func() error {
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for _, pod := range pods {
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err := verifyPodRestartCount(f, pod.Name, len(pod.Spec.Containers), numRestarts)
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if 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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}, time.Minute, 5*time.Second).Should(gomega.BeNil())
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ginkgo.By("Waiting 15 seconds for cAdvisor to collect 2 stats points")
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time.Sleep(15 * time.Second)
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// Setup expectations.
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const (
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maxStartAge = time.Hour * 24 * 365 // 1 year
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maxStatsAge = time.Minute
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)
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ginkgo.By("Fetching node so we can match against an appropriate memory limit")
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node := getLocalNode(f)
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memoryCapacity := node.Status.Capacity["memory"]
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memoryLimit := memoryCapacity.Value()
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fsCapacityBounds := bounded(100*e2evolume.Mb, 10*e2evolume.Tb)
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// Expectations for system containers.
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sysContExpectations := func() types.GomegaMatcher {
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return gstruct.MatchAllFields(gstruct.Fields{
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"Name": gstruct.Ignore(),
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"StartTime": recent(maxStartAge),
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"CPU": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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// CRI stats provider tries to estimate the value of UsageNanoCores. This value can be
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// either 0 or between 10000 and 2e9.
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// Please refer, https://github.com/kubernetes/kubernetes/pull/95345#discussion_r501630942
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// for more information.
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"UsageNanoCores": gomega.SatisfyAny(gomega.BeZero(), bounded(10000, 2e9)),
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"UsageCoreNanoSeconds": bounded(10000000, 1e15),
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}),
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"Memory": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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// We don't limit system container memory.
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"AvailableBytes": gomega.BeNil(),
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"UsageBytes": bounded(1*e2evolume.Mb, memoryLimit),
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"WorkingSetBytes": bounded(1*e2evolume.Mb, memoryLimit),
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// this now returns /sys/fs/cgroup/memory.stat total_rss
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"RSSBytes": bounded(1*e2evolume.Mb, memoryLimit),
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"PageFaults": bounded(1000, 1e9),
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"MajorPageFaults": bounded(0, 100000),
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}),
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"Accelerators": gomega.BeEmpty(),
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"Rootfs": gomega.BeNil(),
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"Logs": gomega.BeNil(),
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"UserDefinedMetrics": gomega.BeEmpty(),
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})
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}
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expectedMajorPageFaultsUpperBound := 10
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if IsCgroup2UnifiedMode() {
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expectedMajorPageFaultsUpperBound = 1000
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}
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podsContExpectations := sysContExpectations().(*gstruct.FieldsMatcher)
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podsContExpectations.Fields["Memory"] = ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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// Pods are limited by Node Allocatable
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"AvailableBytes": bounded(1*e2evolume.Kb, memoryLimit),
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"UsageBytes": bounded(10*e2evolume.Kb, memoryLimit),
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"WorkingSetBytes": bounded(10*e2evolume.Kb, memoryLimit),
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"RSSBytes": bounded(1*e2evolume.Kb, memoryLimit),
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"PageFaults": bounded(0, 1000000),
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"MajorPageFaults": bounded(0, expectedMajorPageFaultsUpperBound),
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})
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runtimeContExpectations := sysContExpectations().(*gstruct.FieldsMatcher)
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if systemdutil.IsRunningSystemd() && framework.TestContext.ContainerRuntime == "docker" {
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// Some Linux distributions still ship a docker.service that is missing
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// a `Delegate=yes` setting (or equivalent CPUAccounting= and MemoryAccounting=)
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// that allows us to monitor the container runtime resource usage through
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// the "cpu" and "memory" cgroups.
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//
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// Make an exception here for those distros, only for Docker, so that they
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// can pass the full node e2e tests even in that case.
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//
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// For newer container runtimes (using CRI) and even distros that still
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// ship Docker, we should encourage them to always set `Delegate=yes` in
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// order to make monitoring of the runtime possible.
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stdout, err := exec.Command("systemctl", "show", "-p", "Delegate", "docker.service").CombinedOutput()
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if err == nil && strings.TrimSpace(string(stdout)) == "Delegate=no" {
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// Only make these optional if we can successfully confirm that
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// Delegate is set to "no" (in other words, unset.) If we fail
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// to check that, default to requiring it, which might cause
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// false positives, but that should be the safer approach.
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ginkgo.By("Making runtime container expectations optional, since systemd was not configured to Delegate=yes the cgroups")
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runtimeContExpectations.Fields["Memory"] = gomega.Or(gomega.BeNil(), runtimeContExpectations.Fields["Memory"])
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runtimeContExpectations.Fields["CPU"] = gomega.Or(gomega.BeNil(), runtimeContExpectations.Fields["CPU"])
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}
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}
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systemContainers := gstruct.Elements{
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"kubelet": sysContExpectations(),
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"runtime": runtimeContExpectations,
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"pods": podsContExpectations,
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}
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// The Kubelet only manages the 'misc' system container if the host is not running systemd.
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if !systemdutil.IsRunningSystemd() {
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framework.Logf("Host not running systemd; expecting 'misc' system container.")
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miscContExpectations := sysContExpectations().(*gstruct.FieldsMatcher)
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// Misc processes are system-dependent, so relax the memory constraints.
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miscContExpectations.Fields["Memory"] = ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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// We don't limit system container memory.
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"AvailableBytes": gomega.BeNil(),
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"UsageBytes": bounded(100*e2evolume.Kb, memoryLimit),
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"WorkingSetBytes": bounded(100*e2evolume.Kb, memoryLimit),
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"RSSBytes": bounded(100*e2evolume.Kb, memoryLimit),
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"PageFaults": bounded(1000, 1e9),
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"MajorPageFaults": bounded(0, 100000),
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})
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systemContainers["misc"] = miscContExpectations
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}
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// Expectations for pods.
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podExpectations := gstruct.MatchAllFields(gstruct.Fields{
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"PodRef": gstruct.Ignore(),
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"StartTime": recent(maxStartAge),
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"Containers": gstruct.MatchAllElements(summaryObjectID, gstruct.Elements{
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"busybox-container": gstruct.MatchAllFields(gstruct.Fields{
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"Name": gomega.Equal("busybox-container"),
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"StartTime": recent(maxStartAge),
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"CPU": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"UsageNanoCores": bounded(10000, 1e9),
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"UsageCoreNanoSeconds": bounded(10000000, 1e11),
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}),
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"Memory": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": bounded(1*e2evolume.Kb, 80*e2evolume.Mb),
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"UsageBytes": bounded(10*e2evolume.Kb, 80*e2evolume.Mb),
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"WorkingSetBytes": bounded(10*e2evolume.Kb, 80*e2evolume.Mb),
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"RSSBytes": bounded(1*e2evolume.Kb, 80*e2evolume.Mb),
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"PageFaults": bounded(100, 1000000),
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"MajorPageFaults": bounded(0, 10),
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}),
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"Accelerators": gomega.BeEmpty(),
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"Rootfs": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(e2evolume.Kb, 10*e2evolume.Mb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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"Logs": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(e2evolume.Kb, 10*e2evolume.Mb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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"UserDefinedMetrics": gomega.BeEmpty(),
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}),
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}),
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"Network": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"InterfaceStats": gstruct.MatchAllFields(gstruct.Fields{
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"Name": gomega.Equal("eth0"),
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"RxBytes": bounded(10, 10*e2evolume.Mb),
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"RxErrors": bounded(0, 1000),
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"TxBytes": bounded(10, 10*e2evolume.Mb),
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"TxErrors": bounded(0, 1000),
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}),
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"Interfaces": gomega.Not(gomega.BeNil()),
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}),
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"CPU": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"UsageNanoCores": bounded(10000, 1e9),
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"UsageCoreNanoSeconds": bounded(10000000, 1e11),
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}),
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"Memory": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": bounded(1*e2evolume.Kb, 80*e2evolume.Mb),
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"UsageBytes": bounded(10*e2evolume.Kb, 80*e2evolume.Mb),
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"WorkingSetBytes": bounded(10*e2evolume.Kb, 80*e2evolume.Mb),
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"RSSBytes": bounded(1*e2evolume.Kb, 80*e2evolume.Mb),
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"PageFaults": bounded(0, 1000000),
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"MajorPageFaults": bounded(0, 10),
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}),
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"VolumeStats": gstruct.MatchAllElements(summaryObjectID, gstruct.Elements{
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"test-empty-dir": gstruct.MatchAllFields(gstruct.Fields{
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"Name": gomega.Equal("test-empty-dir"),
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"PVCRef": gomega.BeNil(),
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"FsStats": gstruct.MatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(e2evolume.Kb, 1*e2evolume.Mb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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}),
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}),
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"EphemeralStorage": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(e2evolume.Kb, 21*e2evolume.Mb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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"ProcessStats": ptrMatchAllFields(gstruct.Fields{
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"ProcessCount": bounded(0, 1e8),
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}),
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})
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matchExpectations := ptrMatchAllFields(gstruct.Fields{
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"Node": gstruct.MatchAllFields(gstruct.Fields{
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"NodeName": gomega.Equal(framework.TestContext.NodeName),
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"StartTime": recent(maxStartAge),
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"SystemContainers": gstruct.MatchAllElements(summaryObjectID, systemContainers),
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"CPU": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"UsageNanoCores": bounded(100e3, 2e9),
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"UsageCoreNanoSeconds": bounded(1e9, 1e15),
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}),
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"Memory": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": bounded(100*e2evolume.Mb, memoryLimit),
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"UsageBytes": bounded(10*e2evolume.Mb, memoryLimit),
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"WorkingSetBytes": bounded(10*e2evolume.Mb, memoryLimit),
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// this now returns /sys/fs/cgroup/memory.stat total_rss
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"RSSBytes": bounded(1*e2evolume.Kb, memoryLimit),
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"PageFaults": bounded(1000, 1e9),
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"MajorPageFaults": bounded(0, 100000),
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}),
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// TODO(#28407): Handle non-eth0 network interface names.
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"Network": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"InterfaceStats": gstruct.MatchAllFields(gstruct.Fields{
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"Name": gomega.Or(gomega.BeEmpty(), gomega.Equal("eth0")),
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"RxBytes": gomega.Or(gomega.BeNil(), bounded(1*e2evolume.Mb, 100*e2evolume.Gb)),
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"RxErrors": gomega.Or(gomega.BeNil(), bounded(0, 100000)),
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"TxBytes": gomega.Or(gomega.BeNil(), bounded(10*e2evolume.Kb, 10*e2evolume.Gb)),
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"TxErrors": gomega.Or(gomega.BeNil(), bounded(0, 100000)),
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}),
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"Interfaces": gomega.Not(gomega.BeNil()),
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}),
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"Fs": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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// we assume we are not running tests on machines more than 10tb of disk
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"UsedBytes": bounded(e2evolume.Kb, 10*e2evolume.Tb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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"Runtime": ptrMatchAllFields(gstruct.Fields{
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"ImageFs": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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// we assume we are not running tests on machines more than 10tb of disk
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"UsedBytes": bounded(e2evolume.Kb, 10*e2evolume.Tb),
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"InodesFree": bounded(1e4, 1e8),
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"Inodes": bounded(1e4, 1e8),
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"InodesUsed": bounded(0, 1e8),
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}),
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}),
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"Rlimit": ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"MaxPID": bounded(0, 1e8),
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"NumOfRunningProcesses": bounded(0, 1e8),
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}),
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}),
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// Ignore extra pods since the tests run in parallel.
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"Pods": gstruct.MatchElements(summaryObjectID, gstruct.IgnoreExtras, gstruct.Elements{
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fmt.Sprintf("%s::%s", f.Namespace.Name, pod0): podExpectations,
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fmt.Sprintf("%s::%s", f.Namespace.Name, pod1): podExpectations,
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}),
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})
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ginkgo.By("Validating /stats/summary")
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// Give pods a minute to actually start up.
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gomega.Eventually(getNodeSummary, 90*time.Second, 15*time.Second).Should(matchExpectations)
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// Then the summary should match the expectations a few more times.
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gomega.Consistently(getNodeSummary, 30*time.Second, 15*time.Second).Should(matchExpectations)
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})
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})
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})
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func getSummaryTestPods(f *framework.Framework, numRestarts int32, names ...string) []*v1.Pod {
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pods := make([]*v1.Pod, 0, len(names))
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for _, name := range names {
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pods = append(pods, &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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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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{
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Name: "busybox-container",
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Image: busyboxImage,
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SecurityContext: &v1.SecurityContext{
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Capabilities: &v1.Capabilities{
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Add: []v1.Capability{"NET_RAW"},
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},
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},
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Command: getRestartingContainerCommand("/test-empty-dir-mnt", 0, numRestarts, "echo 'some bytes' >/outside_the_volume.txt; ping -c 1 google.com; echo 'hello world' >> /test-empty-dir-mnt/file;"),
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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// Must set memory limit to get MemoryStats.AvailableBytes
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v1.ResourceMemory: resource.MustParse("80M"),
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},
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},
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VolumeMounts: []v1.VolumeMount{
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{MountPath: "/test-empty-dir-mnt", Name: "test-empty-dir"},
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},
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},
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},
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SecurityContext: &v1.PodSecurityContext{
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SELinuxOptions: &v1.SELinuxOptions{
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Level: "s0",
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},
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},
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Volumes: []v1.Volume{
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// TODO(#28393): Test secret volumes
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// TODO(#28394): Test hostpath volumes
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{Name: "test-empty-dir", VolumeSource: v1.VolumeSource{EmptyDir: &v1.EmptyDirVolumeSource{}}},
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},
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},
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})
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}
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return pods
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}
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// Mapping function for gstruct.MatchAllElements
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func summaryObjectID(element interface{}) string {
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switch el := element.(type) {
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case kubeletstatsv1alpha1.PodStats:
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return fmt.Sprintf("%s::%s", el.PodRef.Namespace, el.PodRef.Name)
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case kubeletstatsv1alpha1.ContainerStats:
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return el.Name
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case kubeletstatsv1alpha1.VolumeStats:
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return el.Name
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case kubeletstatsv1alpha1.UserDefinedMetric:
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return el.Name
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default:
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framework.Failf("Unknown type: %T", el)
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return "???"
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}
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}
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// Convenience functions for common matcher combinations.
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func ptrMatchAllFields(fields gstruct.Fields) types.GomegaMatcher {
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return gstruct.PointTo(gstruct.MatchAllFields(fields))
|
|
}
|
|
|
|
func bounded(lower, upper interface{}) types.GomegaMatcher {
|
|
return gstruct.PointTo(gomega.And(
|
|
gomega.BeNumerically(">=", lower),
|
|
gomega.BeNumerically("<=", upper)))
|
|
}
|
|
|
|
func recent(d time.Duration) types.GomegaMatcher {
|
|
return gomega.WithTransform(func(t metav1.Time) time.Time {
|
|
return t.Time
|
|
}, gomega.And(
|
|
gomega.BeTemporally(">=", time.Now().Add(-d)),
|
|
// Now() is the test start time, not the match time, so permit a few extra minutes.
|
|
gomega.BeTemporally("<", time.Now().Add(2*time.Minute))))
|
|
}
|
|
|
|
func recordSystemCgroupProcesses() {
|
|
cfg, err := getCurrentKubeletConfig()
|
|
if err != nil {
|
|
framework.Logf("Failed to read kubelet config: %v", err)
|
|
return
|
|
}
|
|
cgroups := map[string]string{
|
|
"kubelet": cfg.KubeletCgroups,
|
|
"misc": cfg.SystemCgroups,
|
|
}
|
|
for name, cgroup := range cgroups {
|
|
if cgroup == "" {
|
|
framework.Logf("Skipping unconfigured cgroup %s", name)
|
|
continue
|
|
}
|
|
|
|
filePattern := "/sys/fs/cgroup/cpu/%s/cgroup.procs"
|
|
if IsCgroup2UnifiedMode() {
|
|
filePattern = "/sys/fs/cgroup/%s/cgroup.procs"
|
|
}
|
|
pids, err := ioutil.ReadFile(fmt.Sprintf(filePattern, cgroup))
|
|
if err != nil {
|
|
framework.Logf("Failed to read processes in cgroup %s: %v", name, err)
|
|
continue
|
|
}
|
|
|
|
framework.Logf("Processes in %s cgroup (%s):", name, cgroup)
|
|
for _, pid := range strings.Fields(string(pids)) {
|
|
path := fmt.Sprintf("/proc/%s/cmdline", pid)
|
|
cmd, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
framework.Logf(" ginkgo.Failed to read %s: %v", path, err)
|
|
} else {
|
|
framework.Logf(" %s", cmd)
|
|
}
|
|
}
|
|
}
|
|
}
|