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Merge pull request kubernetes#44475 from freehan/checkpoint-test
Automatic merge from submit-queue add dockershim checkpoint node e2e test Add a bunch of disruptive cases to test kubelet/dockershim's checkpoint work flow. Some steps are quite hacky. Not sure if there is better ways to do things.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,224 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package e2e_node | ||
|
|
||
| import ( | ||
| "crypto/md5" | ||
| "fmt" | ||
| "os" | ||
| "os/exec" | ||
| "path" | ||
| "regexp" | ||
| "strings" | ||
| "time" | ||
|
|
||
| . "github.com/onsi/ginkgo" | ||
| . "github.com/onsi/gomega" | ||
| "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/util/uuid" | ||
| "k8s.io/apimachinery/pkg/util/wait" | ||
| "k8s.io/kubernetes/test/e2e/framework" | ||
| ) | ||
|
|
||
| const ( | ||
| testCheckpoint = "checkpoint-test" | ||
| // Container GC Period is 1 minute | ||
| gcTimeout = 3 * time.Minute | ||
| testCheckpointContent = `{"version":"v1","name":"fluentd-gcp-v2.0-vmnqx","namespace":"kube-system","data":{},"checksum":1799154314}` | ||
| ) | ||
|
|
||
| var _ = framework.KubeDescribe("Dockershim [Serial] [Disruptive] [Feature:Docker]", func() { | ||
| f := framework.NewDefaultFramework("dockerhism-checkpoint-test") | ||
|
|
||
| It("should clean up pod sandbox checkpoint after pod deletion", func() { | ||
| podName := "pod-checkpoint-no-disrupt" | ||
| runPodCheckpointTest(f, podName, func() { | ||
| checkpoints := findCheckpoints(podName) | ||
| if len(checkpoints) == 0 { | ||
| framework.Failf("No checkpoint for the pod was found") | ||
| } | ||
| }) | ||
| }) | ||
|
|
||
| It("should remove dangling checkpoint file", func() { | ||
| filename := fmt.Sprintf("%x", md5.Sum([]byte(fmt.Sprintf("%s/%s", testCheckpoint, f.Namespace.Name)))) | ||
| fullpath := path.Join(framework.TestContext.DockershimCheckpointDir, filename) | ||
|
|
||
| By(fmt.Sprintf("Write a file at %q", fullpath)) | ||
| err := writeFileAndSync(fullpath, []byte(testCheckpointContent)) | ||
| framework.ExpectNoError(err, "Failed to create file %q", fullpath) | ||
|
|
||
| By("Check if file is removed") | ||
| Eventually(func() bool { | ||
| if _, err := os.Stat(fullpath); os.IsNotExist(err) { | ||
| return true | ||
| } | ||
| return false | ||
| }, gcTimeout, 10*time.Second).Should(BeTrue()) | ||
|
|
||
| }) | ||
|
|
||
| Context("When pod sandbox checkpoint is missing", func() { | ||
| It("should complete pod sandbox clean up", func() { | ||
| podName := "pod-checkpoint-missing" | ||
| runPodCheckpointTest(f, podName, func() { | ||
| checkpoints := findCheckpoints(podName) | ||
| if len(checkpoints) == 0 { | ||
| framework.Failf("No checkpoint for the pod was found") | ||
| } | ||
| By("Removing checkpoint of test pod") | ||
| for _, filename := range checkpoints { | ||
| if len(filename) == 0 { | ||
| continue | ||
| } | ||
| framework.Logf("Removing checkpiont %q", filename) | ||
| _, err := exec.Command("sudo", "rm", filename).CombinedOutput() | ||
| framework.ExpectNoError(err, "Failed to remove checkpoint file %q: %v", string(filename), err) | ||
| } | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| Context("When all containers in pod are missing", func() { | ||
| It("should complete pod sandbox clean up based on the information in sandbox checkpoint", func() { | ||
| runPodCheckpointTest(f, "pod-containers-missing", func() { | ||
| By("Gathering pod container ids") | ||
| stdout, err := exec.Command("sudo", "docker", "ps", "-q", "-f", | ||
| fmt.Sprintf("name=%s", f.Namespace.Name)).CombinedOutput() | ||
| framework.ExpectNoError(err, "Failed to run docker ps: %v", err) | ||
| lines := strings.Split(string(stdout), "\n") | ||
| ids := []string{} | ||
| for _, id := range lines { | ||
| id = cleanString(id) | ||
| if len(id) > 0 { | ||
| ids = append(ids, id) | ||
| } | ||
| } | ||
|
|
||
| By("Stop and remove pod containers") | ||
| dockerStopCmd := append([]string{"docker", "stop"}, ids...) | ||
| _, err = exec.Command("sudo", dockerStopCmd...).CombinedOutput() | ||
| framework.ExpectNoError(err, "Failed to run command %v: %v", dockerStopCmd, err) | ||
| dockerRmCmd := append([]string{"docker", "rm"}, ids...) | ||
| _, err = exec.Command("sudo", dockerRmCmd...).CombinedOutput() | ||
| framework.ExpectNoError(err, "Failed to run command %v: %v", dockerRmCmd, err) | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| Context("When checkpoint file is corrupted", func() { | ||
| It("should complete pod sandbox clean up", func() { | ||
| podName := "pod-checkpoint-corrupted" | ||
| runPodCheckpointTest(f, podName, func() { | ||
| By("Corrupt checkpoint file") | ||
| checkpoints := findCheckpoints(podName) | ||
| if len(checkpoints) == 0 { | ||
| framework.Failf("No checkpoint for the pod was found") | ||
| } | ||
| for _, file := range checkpoints { | ||
| f, err := os.OpenFile(file, os.O_WRONLY|os.O_APPEND, 0644) | ||
| framework.ExpectNoError(err, "Failed to open file %q", file) | ||
| _, err = f.WriteString("blabblab") | ||
| framework.ExpectNoError(err, "Failed to write to file %q", file) | ||
| f.Sync() | ||
| f.Close() | ||
| } | ||
| }) | ||
| }) | ||
| }) | ||
| }) | ||
|
|
||
| func runPodCheckpointTest(f *framework.Framework, podName string, twist func()) { | ||
| podName = podName + string(uuid.NewUUID()) | ||
| By(fmt.Sprintf("Creating test pod: %s", podName)) | ||
| f.PodClient().CreateSync(&v1.Pod{ | ||
| ObjectMeta: metav1.ObjectMeta{Name: podName}, | ||
| Spec: v1.PodSpec{ | ||
| Containers: []v1.Container{ | ||
| { | ||
| Image: framework.GetPauseImageName(f.ClientSet), | ||
| Name: "pause-container", | ||
| }, | ||
| }, | ||
| }, | ||
| }) | ||
|
|
||
| By("Performing disruptive operations") | ||
| twist() | ||
|
|
||
| By("Remove test pod") | ||
| f.PodClient().DeleteSync(podName, &metav1.DeleteOptions{}, framework.DefaultPodDeletionTimeout) | ||
|
|
||
| By("Waiting for checkpoint to be removed") | ||
| if err := wait.PollImmediate(10*time.Second, gcTimeout, func() (bool, error) { | ||
| checkpoints := findCheckpoints(podName) | ||
| if len(checkpoints) == 0 { | ||
| return true, nil | ||
| } | ||
| framework.Logf("Checkpoint of %q still exists: %v", podName, checkpoints) | ||
| return false, nil | ||
| }); err != nil { | ||
| framework.Failf("Failed to observe checkpoint being removed within timeout: %v", err) | ||
| } | ||
| } | ||
|
|
||
| // cleanString cleans up any trailing spaces and new line character for the input string | ||
| func cleanString(output string) string { | ||
| processed := strings.TrimSpace(string(output)) | ||
| regex := regexp.MustCompile(`\r?\n`) | ||
| processed = regex.ReplaceAllString(processed, "") | ||
| return processed | ||
| } | ||
|
|
||
| func writeFileAndSync(path string, data []byte) error { | ||
| f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| _, err = f.Write(data) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| f.Sync() | ||
| if err1 := f.Close(); err == nil { | ||
| err = err1 | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| // findCheckpoints returns all checkpoint files containing input string | ||
| func findCheckpoints(match string) []string { | ||
| By(fmt.Sprintf("Search checkpoints containing %q", match)) | ||
| checkpoints := []string{} | ||
| stdout, err := exec.Command("sudo", "grep", "-rl", match, framework.TestContext.DockershimCheckpointDir).CombinedOutput() | ||
| if err != nil { | ||
| framework.Logf("grep from dockershim checkpoint directory returns error: %v", err) | ||
| } | ||
| if stdout == nil { | ||
| return checkpoints | ||
| } | ||
| files := strings.Split(string(stdout), "\n") | ||
| for _, file := range files { | ||
| cleaned := cleanString(file) | ||
| if len(cleaned) == 0 { | ||
| continue | ||
| } | ||
| checkpoints = append(checkpoints, cleaned) | ||
| } | ||
| return checkpoints | ||
| } |