296 lines
10 KiB
Go
296 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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"fmt"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/stats"
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"k8s.io/kubernetes/test/e2e/framework"
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systemdutil "github.com/coreos/go-systemd/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 _ = framework.KubeDescribe("Summary API", func() {
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f := framework.NewDefaultFramework("summary-test")
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Context("when querying /stats/summary", func() {
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AfterEach(func() {
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if CurrentGinkgoTestDescription().Failed && framework.TestContext.DumpLogsOnFailure {
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framework.LogFailedContainers(f.ClientSet, f.Namespace.Name, framework.Logf)
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}
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})
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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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By("Creating test pods")
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createSummaryTestPods(f, pod0, pod1)
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// Wait 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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kb int64 = 1000
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mb int64 = 1000 * kb
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gb int64 = 1000 * mb
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tb int64 = 1000 * gb
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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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fsCapacityBounds := bounded(100*mb, 100*gb)
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// Expectations for system containers.
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sysContExpectations := 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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"UsageNanoCores": 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": BeNil(),
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"UsageBytes": bounded(1*mb, 10*gb),
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"WorkingSetBytes": bounded(1*mb, 10*gb),
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"RSSBytes": bounded(1*mb, 1*gb),
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"PageFaults": bounded(1000, 1E9),
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"MajorPageFaults": bounded(0, 100000),
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}),
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"Rootfs": BeNil(),
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"Logs": BeNil(),
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"UserDefinedMetrics": BeEmpty(),
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})
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systemContainers := gstruct.Elements{
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"kubelet": sysContExpectations,
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"runtime": sysContExpectations,
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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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systemContainers["misc"] = sysContExpectations
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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": 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(100000, 100000000),
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"UsageCoreNanoSeconds": bounded(10000000, 1000000000),
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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*mb, 10*mb),
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"UsageBytes": bounded(10*kb, 5*mb),
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"WorkingSetBytes": bounded(10*kb, mb),
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"RSSBytes": bounded(1*kb, mb),
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"PageFaults": bounded(100, 100000),
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"MajorPageFaults": bounded(0, 10),
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}),
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"Rootfs": ptrMatchAllFields(gstruct.Fields{
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(kb, 10*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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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(kb, 10*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": 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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"RxBytes": bounded(10, 10*mb),
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"RxErrors": bounded(0, 1000),
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"TxBytes": bounded(10, 10*mb),
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"TxErrors": bounded(0, 1000),
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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": Equal("test-empty-dir"),
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"FsStats": gstruct.MatchAllFields(gstruct.Fields{
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(kb, 1*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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})
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matchExpectations := ptrMatchAllFields(gstruct.Fields{
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"Node": gstruct.MatchAllFields(gstruct.Fields{
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"NodeName": 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*mb, 100*gb),
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"UsageBytes": bounded(10*mb, 10*gb),
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"WorkingSetBytes": bounded(10*mb, 10*gb),
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"RSSBytes": bounded(1*kb, 1*gb),
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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": Or(BeNil(), ptrMatchAllFields(gstruct.Fields{
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"Time": recent(maxStatsAge),
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"RxBytes": bounded(1*mb, 100*gb),
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"RxErrors": bounded(0, 100000),
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"TxBytes": bounded(10*kb, 10*gb),
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"TxErrors": bounded(0, 100000),
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})),
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"Fs": ptrMatchAllFields(gstruct.Fields{
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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(kb, 10*gb),
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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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"AvailableBytes": fsCapacityBounds,
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"CapacityBytes": fsCapacityBounds,
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"UsedBytes": bounded(kb, 10*gb),
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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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// 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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By("Validating /stats/summary")
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// Give pods a minute to actually start up.
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Eventually(getNodeSummary, 1*time.Minute, 15*time.Second).Should(matchExpectations)
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// Then the summary should match the expectations a few more times.
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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 createSummaryTestPods(f *framework.Framework, names ...string) {
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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: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"sh", "-c", "ping -c 1 google.com; while true; do echo 'hello world' >> /test-empty-dir-mnt/file ; sleep 1; done"},
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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("10M"),
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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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f.PodClient().CreateBatch(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 stats.PodStats:
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return fmt.Sprintf("%s::%s", el.PodRef.Namespace, el.PodRef.Name)
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case stats.ContainerStats:
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return el.Name
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case stats.VolumeStats:
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return el.Name
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case stats.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))
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}
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func bounded(lower, upper interface{}) types.GomegaMatcher {
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return gstruct.PointTo(And(
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BeNumerically(">=", lower),
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BeNumerically("<=", upper)))
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}
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func recent(d time.Duration) types.GomegaMatcher {
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return WithTransform(func(t metav1.Time) time.Time {
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return t.Time
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}, And(
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BeTemporally(">=", time.Now().Add(-d)),
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// Now() is the test start time, not the match time, so permit a few extra minutes.
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BeTemporally("<", time.Now().Add(2*time.Minute))))
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}
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