04bdd37bc4
Automatic merge from submit-queue Use pause image depending on the server's platform when testing Removed all pause image constant strings, now the pause image is chosen by arch. Part of the effort of making e2e arch-agnostic. The pause image name and version is also now only in two places, and it's documented to bump both Also removed "amd64" constants in the code. Such constants should be replaced by `runtime.GOARCH` or by looking up the server platform Fixes: #22876 and #15140 Makes it easier for: #25730 Related: #17981 This is for `v1.3` @ixdy @thockin @vishh @kubernetes/sig-testing @andyzheng0831 @pensu
609 lines
21 KiB
Go
609 lines
21 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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
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import (
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"fmt"
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"math"
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"os"
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"sort"
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"strconv"
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"sync"
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"time"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/client/cache"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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controllerframework "k8s.io/kubernetes/pkg/controller/framework"
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"k8s.io/kubernetes/pkg/fields"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/util"
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"k8s.io/kubernetes/pkg/watch"
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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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const (
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MinSaturationThreshold = 2 * time.Minute
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MinPodsPerSecondThroughput = 8
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)
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// Maximum container failures this test tolerates before failing.
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var MaxContainerFailures = 0
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func density30AddonResourceVerifier() map[string]framework.ResourceConstraint {
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constraints := make(map[string]framework.ResourceConstraint)
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constraints["fluentd-elasticsearch"] = framework.ResourceConstraint{
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CPUConstraint: 0.2,
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MemoryConstraint: 250 * (1024 * 1024),
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}
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constraints["elasticsearch-logging"] = framework.ResourceConstraint{
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CPUConstraint: 2,
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// TODO: bring it down to 750MB again, when we lower Kubelet verbosity level. I.e. revert #19164
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MemoryConstraint: 5000 * (1024 * 1024),
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}
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constraints["heapster"] = framework.ResourceConstraint{
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CPUConstraint: 2,
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MemoryConstraint: 1800 * (1024 * 1024),
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}
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constraints["kibana-logging"] = framework.ResourceConstraint{
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CPUConstraint: 0.2,
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MemoryConstraint: 100 * (1024 * 1024),
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}
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constraints["kube-proxy"] = framework.ResourceConstraint{
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CPUConstraint: 0.05,
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MemoryConstraint: 20 * (1024 * 1024),
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}
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constraints["l7-lb-controller"] = framework.ResourceConstraint{
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CPUConstraint: 0.05,
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MemoryConstraint: 20 * (1024 * 1024),
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}
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constraints["influxdb"] = framework.ResourceConstraint{
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CPUConstraint: 2,
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MemoryConstraint: 500 * (1024 * 1024),
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}
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return constraints
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}
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func logPodStartupStatus(c *client.Client, expectedPods int, ns string, observedLabels map[string]string, period time.Duration, stopCh chan struct{}) {
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label := labels.SelectorFromSet(labels.Set(observedLabels))
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podStore := framework.NewPodStore(c, ns, label, fields.Everything())
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defer podStore.Stop()
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ticker := time.NewTicker(period)
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for {
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select {
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case <-ticker.C:
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pods := podStore.List()
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startupStatus := framework.ComputeRCStartupStatus(pods, expectedPods)
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startupStatus.Print("Density")
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case <-stopCh:
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pods := podStore.List()
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startupStatus := framework.ComputeRCStartupStatus(pods, expectedPods)
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startupStatus.Print("Density")
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return
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}
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}
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}
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// This test suite can take a long time to run, and can affect or be affected by other tests.
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// So by default it is added to the ginkgo.skip list (see driver.go).
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// To run this suite you must explicitly ask for it by setting the
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// -t/--test flag or ginkgo.focus flag.
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// IMPORTANT: This test is designed to work on large (>= 100 Nodes) clusters. For smaller ones
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// results will not be representative for control-plane performance as we'll start hitting
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// limits on Docker's concurrent container startup.
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var _ = framework.KubeDescribe("Density", func() {
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var c *client.Client
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var nodeCount int
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var RCName string
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var additionalPodsPrefix string
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var ns string
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var uuid string
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var e2eStartupTime time.Duration
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var totalPods int
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var nodeCpuCapacity int64
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var nodeMemCapacity int64
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// Gathers data prior to framework namespace teardown
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AfterEach(func() {
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saturationThreshold := time.Duration((totalPods / MinPodsPerSecondThroughput)) * time.Second
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if saturationThreshold < MinSaturationThreshold {
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saturationThreshold = MinSaturationThreshold
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}
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Expect(e2eStartupTime).NotTo(BeNumerically(">", saturationThreshold))
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saturationData := framework.SaturationTime{
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TimeToSaturate: e2eStartupTime,
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NumberOfNodes: nodeCount,
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NumberOfPods: totalPods,
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Throughput: float32(totalPods) / float32(e2eStartupTime/time.Second),
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}
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framework.Logf("Cluster saturation time: %s", framework.PrettyPrintJSON(saturationData))
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// Verify latency metrics.
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highLatencyRequests, err := framework.HighLatencyRequests(c)
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framework.ExpectNoError(err)
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Expect(highLatencyRequests).NotTo(BeNumerically(">", 0), "There should be no high-latency requests")
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// Verify scheduler metrics.
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// TODO: Reset metrics at the beginning of the test.
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// We should do something similar to how we do it for APIserver.
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framework.ExpectNoError(framework.VerifySchedulerLatency(c))
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})
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// Explicitly put here, to delete namespace at the end of the test
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// (after measuring latency metrics, etc.).
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f := framework.NewDefaultFramework("density")
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f.NamespaceDeletionTimeout = time.Hour
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BeforeEach(func() {
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c = f.Client
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ns = f.Namespace.Name
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nodes := framework.GetReadySchedulableNodesOrDie(c)
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nodeCount = len(nodes.Items)
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Expect(nodeCount).NotTo(BeZero())
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nodeCpuCapacity = nodes.Items[0].Status.Allocatable.Cpu().MilliValue()
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nodeMemCapacity = nodes.Items[0].Status.Allocatable.Memory().Value()
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// Terminating a namespace (deleting the remaining objects from it - which
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// generally means events) can affect the current run. Thus we wait for all
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// terminating namespace to be finally deleted before starting this test.
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err := framework.CheckTestingNSDeletedExcept(c, ns)
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framework.ExpectNoError(err)
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uuid = string(util.NewUUID())
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framework.ExpectNoError(framework.ResetMetrics(c))
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framework.ExpectNoError(os.Mkdir(fmt.Sprintf(framework.TestContext.OutputDir+"/%s", uuid), 0777))
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framework.Logf("Listing nodes for easy debugging:\n")
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for _, node := range nodes.Items {
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var internalIP, externalIP string
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for _, address := range node.Status.Addresses {
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if address.Type == api.NodeInternalIP {
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internalIP = address.Address
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}
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if address.Type == api.NodeExternalIP {
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externalIP = address.Address
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}
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}
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framework.Logf("Name: %v, clusterIP: %v, externalIP: %v", node.ObjectMeta.Name, internalIP, externalIP)
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}
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})
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type Density struct {
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// Controls if e2e latency tests should be run (they are slow)
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runLatencyTest bool
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podsPerNode int
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// Controls how often the apiserver is polled for pods
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interval time.Duration
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}
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densityTests := []Density{
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// TODO: Expose runLatencyTest as ginkgo flag.
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{podsPerNode: 3, runLatencyTest: false, interval: 10 * time.Second},
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{podsPerNode: 30, runLatencyTest: true, interval: 10 * time.Second},
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{podsPerNode: 50, runLatencyTest: false, interval: 10 * time.Second},
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{podsPerNode: 95, runLatencyTest: true, interval: 10 * time.Second},
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{podsPerNode: 100, runLatencyTest: false, interval: 10 * time.Second},
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}
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for _, testArg := range densityTests {
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name := fmt.Sprintf("should allow starting %d pods per node", testArg.podsPerNode)
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switch testArg.podsPerNode {
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case 30:
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name = "[Feature:Performance] " + name
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f.AddonResourceConstraints = density30AddonResourceVerifier()
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case 95:
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name = "[Feature:HighDensityPerformance]" + name
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default:
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name = "[Feature:ManualPerformance] " + name
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}
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itArg := testArg
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It(name, func() {
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fileHndl, err := os.Create(fmt.Sprintf(framework.TestContext.OutputDir+"/%s/pod_states.csv", uuid))
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framework.ExpectNoError(err)
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defer fileHndl.Close()
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podsPerNode := itArg.podsPerNode
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totalPods = podsPerNode * nodeCount
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// TODO: loop to podsPerNode instead of 1 when we're ready.
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numberOrRCs := 1
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RCConfigs := make([]framework.RCConfig, numberOrRCs)
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for i := 0; i < numberOrRCs; i++ {
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RCName = "density" + strconv.Itoa(totalPods) + "-" + strconv.Itoa(i) + "-" + uuid
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RCConfigs[i] = framework.RCConfig{Client: c,
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Image: framework.GetPauseImageName(f.Client),
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Name: RCName,
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Namespace: ns,
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Labels: map[string]string{"type": "densityPod"},
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PollInterval: itArg.interval,
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PodStatusFile: fileHndl,
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Replicas: (totalPods + numberOrRCs - 1) / numberOrRCs,
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CpuRequest: nodeCpuCapacity / 100,
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MemRequest: nodeMemCapacity / 100,
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MaxContainerFailures: &MaxContainerFailures,
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Silent: true,
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}
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}
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// Create a listener for events.
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// eLock is a lock protects the events
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var eLock sync.Mutex
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events := make([](*api.Event), 0)
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_, controller := controllerframework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (runtime.Object, error) {
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return c.Events(ns).List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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return c.Events(ns).Watch(options)
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},
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},
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&api.Event{},
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0,
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controllerframework.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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eLock.Lock()
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defer eLock.Unlock()
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events = append(events, obj.(*api.Event))
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},
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},
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)
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stop := make(chan struct{})
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go controller.Run(stop)
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// Create a listener for api updates
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// uLock is a lock protects the updateCount
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var uLock sync.Mutex
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updateCount := 0
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label := labels.SelectorFromSet(labels.Set(map[string]string{"type": "densityPod"}))
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_, updateController := controllerframework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (runtime.Object, error) {
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options.LabelSelector = label
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return c.Pods(ns).List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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options.LabelSelector = label
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return c.Pods(ns).Watch(options)
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},
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},
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&api.Pod{},
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0,
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controllerframework.ResourceEventHandlerFuncs{
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UpdateFunc: func(_, _ interface{}) {
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uLock.Lock()
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defer uLock.Unlock()
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updateCount++
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},
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},
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)
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go updateController.Run(stop)
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// Start all replication controllers.
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startTime := time.Now()
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wg := sync.WaitGroup{}
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wg.Add(len(RCConfigs))
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for i := range RCConfigs {
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rcConfig := RCConfigs[i]
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go func() {
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framework.ExpectNoError(framework.RunRC(rcConfig))
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wg.Done()
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}()
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}
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logStopCh := make(chan struct{})
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go logPodStartupStatus(c, totalPods, ns, map[string]string{"type": "densityPod"}, itArg.interval, logStopCh)
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wg.Wait()
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e2eStartupTime = time.Now().Sub(startTime)
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close(logStopCh)
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framework.Logf("E2E startup time for %d pods: %v", totalPods, e2eStartupTime)
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framework.Logf("Throughput (pods/s) during cluster saturation phase: %v", float32(totalPods)/float32(e2eStartupTime/time.Second))
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By("Waiting for all events to be recorded")
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last := -1
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current := len(events)
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lastCount := -1
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currentCount := updateCount
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timeout := 10 * time.Minute
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for start := time.Now(); (last < current || lastCount < currentCount) && time.Since(start) < timeout; time.Sleep(10 * time.Second) {
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func() {
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eLock.Lock()
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defer eLock.Unlock()
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last = current
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current = len(events)
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}()
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func() {
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uLock.Lock()
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defer uLock.Unlock()
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lastCount = currentCount
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currentCount = updateCount
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}()
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}
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close(stop)
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if current != last {
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framework.Logf("Warning: Not all events were recorded after waiting %.2f minutes", timeout.Minutes())
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}
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framework.Logf("Found %d events", current)
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if currentCount != lastCount {
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framework.Logf("Warning: Not all updates were recorded after waiting %.2f minutes", timeout.Minutes())
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}
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framework.Logf("Found %d updates", currentCount)
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// Tune the threshold for allowed failures.
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badEvents := framework.BadEvents(events)
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Expect(badEvents).NotTo(BeNumerically(">", int(math.Floor(0.01*float64(totalPods)))))
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// Print some data about Pod to Node allocation
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By("Printing Pod to Node allocation data")
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podList, err := c.Pods(api.NamespaceAll).List(api.ListOptions{})
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framework.ExpectNoError(err)
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pausePodAllocation := make(map[string]int)
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systemPodAllocation := make(map[string][]string)
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for _, pod := range podList.Items {
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if pod.Namespace == api.NamespaceSystem {
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systemPodAllocation[pod.Spec.NodeName] = append(systemPodAllocation[pod.Spec.NodeName], pod.Name)
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} else {
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pausePodAllocation[pod.Spec.NodeName]++
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}
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}
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nodeNames := make([]string, 0)
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for k := range pausePodAllocation {
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nodeNames = append(nodeNames, k)
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}
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sort.Strings(nodeNames)
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for _, node := range nodeNames {
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framework.Logf("%v: %v pause pods, system pods: %v", node, pausePodAllocation[node], systemPodAllocation[node])
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}
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if itArg.runLatencyTest {
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By("Scheduling additional Pods to measure startup latencies")
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createTimes := make(map[string]unversioned.Time, 0)
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nodes := make(map[string]string, 0)
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scheduleTimes := make(map[string]unversioned.Time, 0)
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runTimes := make(map[string]unversioned.Time, 0)
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watchTimes := make(map[string]unversioned.Time, 0)
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var mutex sync.Mutex
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checkPod := func(p *api.Pod) {
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mutex.Lock()
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defer mutex.Unlock()
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defer GinkgoRecover()
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if p.Status.Phase == api.PodRunning {
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if _, found := watchTimes[p.Name]; !found {
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watchTimes[p.Name] = unversioned.Now()
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createTimes[p.Name] = p.CreationTimestamp
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nodes[p.Name] = p.Spec.NodeName
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var startTime unversioned.Time
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for _, cs := range p.Status.ContainerStatuses {
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if cs.State.Running != nil {
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if startTime.Before(cs.State.Running.StartedAt) {
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startTime = cs.State.Running.StartedAt
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}
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}
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}
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if startTime != unversioned.NewTime(time.Time{}) {
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runTimes[p.Name] = startTime
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} else {
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framework.Failf("Pod %v is reported to be running, but none of its containers is", p.Name)
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}
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}
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}
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}
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additionalPodsPrefix = "density-latency-pod"
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latencyPodsStore, controller := controllerframework.NewInformer(
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&cache.ListWatch{
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ListFunc: func(options api.ListOptions) (runtime.Object, error) {
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options.LabelSelector = labels.SelectorFromSet(labels.Set{"type": additionalPodsPrefix})
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return c.Pods(ns).List(options)
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},
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WatchFunc: func(options api.ListOptions) (watch.Interface, error) {
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options.LabelSelector = labels.SelectorFromSet(labels.Set{"type": additionalPodsPrefix})
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return c.Pods(ns).Watch(options)
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},
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},
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&api.Pod{},
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0,
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controllerframework.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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p, ok := obj.(*api.Pod)
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Expect(ok).To(Equal(true))
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go checkPod(p)
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},
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UpdateFunc: func(oldObj, newObj interface{}) {
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p, ok := newObj.(*api.Pod)
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Expect(ok).To(Equal(true))
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go checkPod(p)
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},
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},
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)
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stopCh := make(chan struct{})
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go controller.Run(stopCh)
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// Create some additional pods with throughput ~5 pods/sec.
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var wg sync.WaitGroup
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wg.Add(nodeCount)
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// Explicitly set requests here.
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// Thanks to it we trigger increasing priority function by scheduling
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// a pod to a node, which in turn will result in spreading latency pods
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// more evenly between nodes.
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cpuRequest := *resource.NewMilliQuantity(nodeCpuCapacity/5, resource.DecimalSI)
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memRequest := *resource.NewQuantity(nodeMemCapacity/5, resource.DecimalSI)
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if podsPerNode > 30 {
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// This is to make them schedulable on high-density tests
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// (e.g. 100 pods/node kubemark).
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cpuRequest = *resource.NewMilliQuantity(0, resource.DecimalSI)
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memRequest = *resource.NewQuantity(0, resource.DecimalSI)
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}
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for i := 1; i <= nodeCount; i++ {
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name := additionalPodsPrefix + "-" + strconv.Itoa(i)
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go createRunningPodFromRC(&wg, c, name, ns, framework.GetPauseImageName(f.Client), additionalPodsPrefix, cpuRequest, memRequest)
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time.Sleep(200 * time.Millisecond)
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}
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wg.Wait()
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By("Waiting for all Pods begin observed by the watch...")
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for start := time.Now(); len(watchTimes) < nodeCount; time.Sleep(10 * time.Second) {
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if time.Since(start) < timeout {
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|
framework.Failf("Timeout reached waiting for all Pods being observed by the watch.")
|
|
}
|
|
}
|
|
close(stopCh)
|
|
|
|
nodeToLatencyPods := make(map[string]int)
|
|
for _, item := range latencyPodsStore.List() {
|
|
pod := item.(*api.Pod)
|
|
nodeToLatencyPods[pod.Spec.NodeName]++
|
|
}
|
|
for node, count := range nodeToLatencyPods {
|
|
if count > 1 {
|
|
framework.Logf("%d latency pods scheduled on %s", count, node)
|
|
}
|
|
}
|
|
|
|
selector := fields.Set{
|
|
"involvedObject.kind": "Pod",
|
|
"involvedObject.namespace": ns,
|
|
"source": api.DefaultSchedulerName,
|
|
}.AsSelector()
|
|
options := api.ListOptions{FieldSelector: selector}
|
|
schedEvents, err := c.Events(ns).List(options)
|
|
framework.ExpectNoError(err)
|
|
for k := range createTimes {
|
|
for _, event := range schedEvents.Items {
|
|
if event.InvolvedObject.Name == k {
|
|
scheduleTimes[k] = event.FirstTimestamp
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
scheduleLag := make([]framework.PodLatencyData, 0)
|
|
startupLag := make([]framework.PodLatencyData, 0)
|
|
watchLag := make([]framework.PodLatencyData, 0)
|
|
schedToWatchLag := make([]framework.PodLatencyData, 0)
|
|
e2eLag := make([]framework.PodLatencyData, 0)
|
|
|
|
for name, create := range createTimes {
|
|
sched, ok := scheduleTimes[name]
|
|
Expect(ok).To(Equal(true))
|
|
run, ok := runTimes[name]
|
|
Expect(ok).To(Equal(true))
|
|
watch, ok := watchTimes[name]
|
|
Expect(ok).To(Equal(true))
|
|
node, ok := nodes[name]
|
|
Expect(ok).To(Equal(true))
|
|
|
|
scheduleLag = append(scheduleLag, framework.PodLatencyData{Name: name, Node: node, Latency: sched.Time.Sub(create.Time)})
|
|
startupLag = append(startupLag, framework.PodLatencyData{Name: name, Node: node, Latency: run.Time.Sub(sched.Time)})
|
|
watchLag = append(watchLag, framework.PodLatencyData{Name: name, Node: node, Latency: watch.Time.Sub(run.Time)})
|
|
schedToWatchLag = append(schedToWatchLag, framework.PodLatencyData{Name: name, Node: node, Latency: watch.Time.Sub(sched.Time)})
|
|
e2eLag = append(e2eLag, framework.PodLatencyData{Name: name, Node: node, Latency: watch.Time.Sub(create.Time)})
|
|
}
|
|
|
|
sort.Sort(framework.LatencySlice(scheduleLag))
|
|
sort.Sort(framework.LatencySlice(startupLag))
|
|
sort.Sort(framework.LatencySlice(watchLag))
|
|
sort.Sort(framework.LatencySlice(schedToWatchLag))
|
|
sort.Sort(framework.LatencySlice(e2eLag))
|
|
|
|
framework.PrintLatencies(scheduleLag, "worst schedule latencies")
|
|
framework.PrintLatencies(startupLag, "worst run-after-schedule latencies")
|
|
framework.PrintLatencies(watchLag, "worst watch latencies")
|
|
framework.PrintLatencies(schedToWatchLag, "worst scheduled-to-end total latencies")
|
|
framework.PrintLatencies(e2eLag, "worst e2e total latencies")
|
|
|
|
// Test whether e2e pod startup time is acceptable.
|
|
podStartupLatency := framework.PodStartupLatency{Latency: framework.ExtractLatencyMetrics(e2eLag)}
|
|
framework.ExpectNoError(framework.VerifyPodStartupLatency(podStartupLatency))
|
|
|
|
framework.LogSuspiciousLatency(startupLag, e2eLag, nodeCount, c)
|
|
}
|
|
|
|
By("Deleting ReplicationController")
|
|
// We explicitly delete all pods to have API calls necessary for deletion accounted in metrics.
|
|
for i := range RCConfigs {
|
|
rcName := RCConfigs[i].Name
|
|
rc, err := c.ReplicationControllers(ns).Get(rcName)
|
|
if err == nil && rc.Spec.Replicas != 0 {
|
|
By("Cleaning up the replication controller")
|
|
err := framework.DeleteRC(c, ns, rcName)
|
|
framework.ExpectNoError(err)
|
|
}
|
|
}
|
|
|
|
By("Removing additional replication controllers if any")
|
|
for i := 1; i <= nodeCount; i++ {
|
|
name := additionalPodsPrefix + "-" + strconv.Itoa(i)
|
|
c.ReplicationControllers(ns).Delete(name)
|
|
}
|
|
})
|
|
}
|
|
})
|
|
|
|
func createRunningPodFromRC(wg *sync.WaitGroup, c *client.Client, name, ns, image, podType string, cpuRequest, memRequest resource.Quantity) {
|
|
defer GinkgoRecover()
|
|
defer wg.Done()
|
|
labels := map[string]string{
|
|
"type": podType,
|
|
"name": name,
|
|
}
|
|
rc := &api.ReplicationController{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Name: name,
|
|
Labels: labels,
|
|
},
|
|
Spec: api.ReplicationControllerSpec{
|
|
Replicas: 1,
|
|
Selector: labels,
|
|
Template: &api.PodTemplateSpec{
|
|
ObjectMeta: api.ObjectMeta{
|
|
Labels: labels,
|
|
},
|
|
Spec: api.PodSpec{
|
|
Containers: []api.Container{
|
|
{
|
|
Name: name,
|
|
Image: image,
|
|
Resources: api.ResourceRequirements{
|
|
Requests: api.ResourceList{
|
|
api.ResourceCPU: cpuRequest,
|
|
api.ResourceMemory: memRequest,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
DNSPolicy: api.DNSDefault,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
_, err := c.ReplicationControllers(ns).Create(rc)
|
|
framework.ExpectNoError(err)
|
|
framework.ExpectNoError(framework.WaitForRCPodsRunning(c, ns, name))
|
|
framework.Logf("Found pod '%s' running", name)
|
|
}
|