dd9de90b0a
note that we don't change the behaviour of kubectl. For example it won't scale new resources. That's the end goal. The first step is to retrofit existing code to use the generic scaler.
133 lines
4.3 KiB
Go
133 lines
4.3 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 scheduling
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import (
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"fmt"
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"time"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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"k8s.io/kubernetes/test/e2e/framework"
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testutils "k8s.io/kubernetes/test/utils"
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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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defaultTimeout = 3 * time.Minute
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)
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// This test requires Rescheduler to be enabled.
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var _ = SIGDescribe("Rescheduler [Serial]", func() {
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f := framework.NewDefaultFramework("rescheduler")
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var ns string
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var totalMillicores int
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BeforeEach(func() {
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framework.SkipUnlessProviderIs("gce", "gke")
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ns = f.Namespace.Name
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nodes := framework.GetReadySchedulableNodesOrDie(f.ClientSet)
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nodeCount := len(nodes.Items)
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Expect(nodeCount).NotTo(BeZero())
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cpu := nodes.Items[0].Status.Capacity[v1.ResourceCPU]
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totalMillicores = int((&cpu).MilliValue()) * nodeCount
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})
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It("should ensure that critical pod is scheduled in case there is no resources available", func() {
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By("reserving all available cpu")
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err := reserveAllCpu(f, "reserve-all-cpu", totalMillicores)
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defer framework.DeleteRCAndPods(f.ClientSet, f.InternalClientset, ns, "reserve-all-cpu")
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framework.ExpectNoError(err)
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By("creating a new instance of Dashboard and waiting for Dashboard to be scheduled")
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label := labels.SelectorFromSet(labels.Set(map[string]string{"k8s-app": "kubernetes-dashboard"}))
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listOpts := metav1.ListOptions{LabelSelector: label.String()}
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deployments, err := f.ClientSet.ExtensionsV1beta1().Deployments(metav1.NamespaceSystem).List(listOpts)
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framework.ExpectNoError(err)
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Expect(len(deployments.Items)).Should(Equal(1))
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deployment := deployments.Items[0]
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replicas := uint(*(deployment.Spec.Replicas))
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err = framework.ScaleDeployment(f.ClientSet, f.InternalClientset, f.ScalesGetter, metav1.NamespaceSystem, deployment.Name, replicas+1, true)
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defer framework.ExpectNoError(framework.ScaleDeployment(f.ClientSet, f.InternalClientset, f.ScalesGetter, metav1.NamespaceSystem, deployment.Name, replicas, true))
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framework.ExpectNoError(err)
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})
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})
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func reserveAllCpu(f *framework.Framework, id string, millicores int) error {
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timeout := 5 * time.Minute
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replicas := millicores / 100
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reserveCpu(f, id, 1, 100)
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framework.ExpectNoError(framework.ScaleRC(f.ClientSet, f.InternalClientset, f.ScalesGetter, f.Namespace.Name, id, uint(replicas), false))
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for start := time.Now(); time.Since(start) < timeout; time.Sleep(10 * time.Second) {
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pods, err := framework.GetPodsInNamespace(f.ClientSet, f.Namespace.Name, framework.ImagePullerLabels)
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if err != nil {
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return err
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}
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if len(pods) != replicas {
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continue
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}
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allRunningOrUnschedulable := true
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for _, pod := range pods {
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if !podRunningOrUnschedulable(pod) {
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allRunningOrUnschedulable = false
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break
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}
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}
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if allRunningOrUnschedulable {
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return nil
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}
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}
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return fmt.Errorf("Pod name %s: Gave up waiting %v for %d pods to come up", id, timeout, replicas)
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}
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func podRunningOrUnschedulable(pod *v1.Pod) bool {
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_, cond := podutil.GetPodCondition(&pod.Status, v1.PodScheduled)
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if cond != nil && cond.Status == v1.ConditionFalse && cond.Reason == "Unschedulable" {
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return true
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}
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running, _ := testutils.PodRunningReady(pod)
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return running
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}
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func reserveCpu(f *framework.Framework, id string, replicas, millicores int) {
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By(fmt.Sprintf("Running RC which reserves %v millicores", millicores))
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request := int64(millicores / replicas)
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config := &testutils.RCConfig{
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Client: f.ClientSet,
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InternalClient: f.InternalClientset,
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Name: id,
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Namespace: f.Namespace.Name,
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Timeout: defaultTimeout,
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Image: framework.GetPauseImageName(f.ClientSet),
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Replicas: replicas,
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CpuRequest: request,
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}
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framework.ExpectNoError(framework.RunRC(*config))
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}
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