139 lines
4.3 KiB
Go
139 lines
4.3 KiB
Go
/*
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Copyright 2015 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
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import (
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"time"
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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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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/kubernetes/pkg/api/v1"
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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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var _ = framework.KubeDescribe("Etcd failure [Disruptive]", func() {
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f := framework.NewDefaultFramework("etcd-failure")
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BeforeEach(func() {
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// This test requires:
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// - SSH
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// - master access
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// ... so the provider check should be identical to the intersection of
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// providers that provide those capabilities.
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framework.SkipUnlessProviderIs("gce")
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Expect(framework.RunRC(testutils.RCConfig{
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Client: f.ClientSet,
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Name: "baz",
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Namespace: f.Namespace.Name,
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Image: framework.GetPauseImageName(f.ClientSet),
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Replicas: 1,
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})).NotTo(HaveOccurred())
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})
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It("should recover from network partition with master", func() {
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etcdFailTest(
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f,
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"sudo iptables -A INPUT -p tcp --destination-port 2379 -j DROP",
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"sudo iptables -D INPUT -p tcp --destination-port 2379 -j DROP",
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)
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})
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It("should recover from SIGKILL", func() {
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etcdFailTest(
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f,
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"pgrep etcd | xargs -I {} sudo kill -9 {}",
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"echo 'do nothing. monit should restart etcd.'",
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)
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})
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})
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func etcdFailTest(f *framework.Framework, failCommand, fixCommand string) {
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doEtcdFailure(failCommand, fixCommand)
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checkExistingRCRecovers(f)
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ServeImageOrFail(f, "basic", "gcr.io/google_containers/serve_hostname:v1.4")
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}
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// For this duration, etcd will be failed by executing a failCommand on the master.
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// If repeat is true, the failCommand will be called at a rate of once per second for
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// the failure duration. If repeat is false, failCommand will only be called once at the
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// beginning of the failure duration. After this duration, we execute a fixCommand on the
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// master and go on to assert that etcd and kubernetes components recover.
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const etcdFailureDuration = 20 * time.Second
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func doEtcdFailure(failCommand, fixCommand string) {
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By("failing etcd")
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masterExec(failCommand)
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time.Sleep(etcdFailureDuration)
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masterExec(fixCommand)
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}
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func masterExec(cmd string) {
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result, err := framework.SSH(cmd, framework.GetMasterHost()+":22", framework.TestContext.Provider)
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Expect(err).NotTo(HaveOccurred())
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if result.Code != 0 {
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framework.LogSSHResult(result)
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framework.Failf("master exec command returned non-zero")
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}
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}
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func checkExistingRCRecovers(f *framework.Framework) {
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By("assert that the pre-existing replication controller recovers")
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podClient := f.ClientSet.Core().Pods(f.Namespace.Name)
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rcSelector := labels.Set{"name": "baz"}.AsSelector()
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By("deleting pods from existing replication controller")
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framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
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options := metav1.ListOptions{LabelSelector: rcSelector.String()}
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pods, err := podClient.List(options)
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if err != nil {
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framework.Logf("apiserver returned error, as expected before recovery: %v", err)
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return false, nil
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}
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if len(pods.Items) == 0 {
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return false, nil
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}
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for _, pod := range pods.Items {
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err = podClient.Delete(pod.Name, metav1.NewDeleteOptions(0))
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Expect(err).NotTo(HaveOccurred())
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}
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framework.Logf("apiserver has recovered")
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return true, nil
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}))
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By("waiting for replication controller to recover")
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framework.ExpectNoError(wait.Poll(time.Millisecond*500, time.Second*60, func() (bool, error) {
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options := metav1.ListOptions{LabelSelector: rcSelector.String()}
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pods, err := podClient.List(options)
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Expect(err).NotTo(HaveOccurred())
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for _, pod := range pods.Items {
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if pod.DeletionTimestamp == nil && v1.IsPodReady(&pod) {
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return true, nil
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}
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}
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return false, nil
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}))
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}
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