208 lines
7.0 KiB
Go
208 lines
7.0 KiB
Go
/*
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Copyright 2017 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 integration
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import (
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/containerd/containerd"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"golang.org/x/net/context"
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"golang.org/x/sys/unix"
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runtime "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
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)
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// Restart test must run sequentially.
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// NOTE(random-liu): Current restart test only support standalone cri-containerd mode.
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func TestSandboxAcrossCRIContainerdRestart(t *testing.T) {
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if !*standaloneCRIContainerd {
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t.Skip("Skip because cri-containerd does not run in standalone mode")
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}
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ctx := context.Background()
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sandboxNS := "sandbox-restart-cri-containerd"
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sandboxes := []struct {
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name string
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id string
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stateBeforeExit runtime.PodSandboxState
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actionAfterExit string
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expectedState runtime.PodSandboxState
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}{
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{
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name: "task-always-ready",
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stateBeforeExit: runtime.PodSandboxState_SANDBOX_READY,
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expectedState: runtime.PodSandboxState_SANDBOX_READY,
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},
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{
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name: "task-always-not-ready",
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stateBeforeExit: runtime.PodSandboxState_SANDBOX_NOTREADY,
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expectedState: runtime.PodSandboxState_SANDBOX_NOTREADY,
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},
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{
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name: "task-exit-before-restart",
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stateBeforeExit: runtime.PodSandboxState_SANDBOX_READY,
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actionAfterExit: "kill",
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expectedState: runtime.PodSandboxState_SANDBOX_NOTREADY,
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},
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{
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name: "task-deleted-before-restart",
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stateBeforeExit: runtime.PodSandboxState_SANDBOX_READY,
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actionAfterExit: "delete",
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expectedState: runtime.PodSandboxState_SANDBOX_NOTREADY,
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},
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}
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t.Logf("Make sure no sandbox is running before test")
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existingSandboxes, err := runtimeService.ListPodSandbox(&runtime.PodSandboxFilter{})
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require.NoError(t, err)
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require.Empty(t, existingSandboxes)
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t.Logf("Start test sandboxes")
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for i := range sandboxes {
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s := &sandboxes[i]
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cfg := PodSandboxConfig(s.name, sandboxNS)
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sb, err := runtimeService.RunPodSandbox(cfg)
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require.NoError(t, err)
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defer func() {
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// Make sure the sandbox is cleaned up in any case.
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runtimeService.StopPodSandbox(sb)
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runtimeService.RemovePodSandbox(sb)
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}()
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s.id = sb
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if s.stateBeforeExit == runtime.PodSandboxState_SANDBOX_NOTREADY {
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require.NoError(t, runtimeService.StopPodSandbox(sb))
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}
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}
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t.Logf("Kill cri-containerd")
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require.NoError(t, KillProcess("cri-containerd"))
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defer func() {
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assert.NoError(t, Eventually(func() (bool, error) {
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return ConnectDaemons() == nil, nil
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}, time.Second, 30*time.Second), "make sure cri-containerd is running before test finish")
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}()
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t.Logf("Change sandbox state, must finish before cri-containerd is restarted")
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for _, s := range sandboxes {
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if s.actionAfterExit == "" {
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continue
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}
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cntr, err := containerdClient.LoadContainer(ctx, s.id)
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require.NoError(t, err)
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task, err := cntr.Task(ctx, nil)
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require.NoError(t, err)
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switch s.actionAfterExit {
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case "kill":
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require.NoError(t, task.Kill(ctx, unix.SIGKILL, containerd.WithKillAll))
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case "delete":
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_, err := task.Delete(ctx, containerd.WithProcessKill)
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require.NoError(t, err)
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}
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}
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t.Logf("Wait until cri-containerd is restarted")
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require.NoError(t, Eventually(func() (bool, error) {
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return ConnectDaemons() == nil, nil
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}, time.Second, 30*time.Second), "wait for cri-containerd to be restarted")
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t.Logf("Check sandbox state after restart")
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loadedSandboxes, err := runtimeService.ListPodSandbox(&runtime.PodSandboxFilter{})
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require.NoError(t, err)
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assert.Len(t, loadedSandboxes, len(sandboxes))
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for _, s := range sandboxes {
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for _, loaded := range loadedSandboxes {
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if s.id == loaded.Id {
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assert.Equal(t, s.expectedState, loaded.State)
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break
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}
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}
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}
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t.Logf("Should be able to stop and remove sandbox after restart")
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for _, s := range sandboxes {
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// Properly stop the sandbox if it's ready before restart.
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if s.stateBeforeExit == runtime.PodSandboxState_SANDBOX_READY {
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assert.NoError(t, runtimeService.StopPodSandbox(s.id))
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}
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assert.NoError(t, runtimeService.RemovePodSandbox(s.id))
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}
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}
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// TestSandboxDeletionAcrossCRIContainerdRestart tests the case that sandbox container
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// is deleted from containerd during cri-containerd is down. This should not happen.
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// However, if this really happens, cri-containerd should not load such sandbox and
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// should do best effort cleanup of the sandbox root directory. Note that in this case,
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// cri-containerd loses the network namespace of the sandbox, so it won't be able to
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// teardown the network properly.
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// This test uses host network sandbox to avoid resource leakage.
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func TestSandboxDeletionAcrossCRIContainerdRestart(t *testing.T) {
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if !*standaloneCRIContainerd {
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t.Skip("Skip because cri-containerd does not run in standalone mode")
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}
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ctx := context.Background()
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sandboxNS := "sandbox-delete-restart-cri-containerd"
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t.Logf("Make sure no sandbox is running before test")
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existingSandboxes, err := runtimeService.ListPodSandbox(&runtime.PodSandboxFilter{})
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require.NoError(t, err)
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require.Empty(t, existingSandboxes)
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t.Logf("Start test sandboxes")
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cfg := PodSandboxConfig("sandbox", sandboxNS, WithHostNetwork)
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sb, err := runtimeService.RunPodSandbox(cfg)
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require.NoError(t, err)
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defer func() {
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// Make sure the sandbox is cleaned up in any case.
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runtimeService.StopPodSandbox(sb)
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runtimeService.RemovePodSandbox(sb)
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}()
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t.Logf("Kill cri-containerd")
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require.NoError(t, KillProcess("cri-containerd"))
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defer func() {
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assert.NoError(t, Eventually(func() (bool, error) {
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return ConnectDaemons() == nil, nil
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}, time.Second, 30*time.Second), "make sure cri-containerd is running before test finish")
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}()
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t.Logf("Delete sandbox container from containerd")
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cntr, err := containerdClient.LoadContainer(ctx, sb)
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require.NoError(t, err)
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task, err := cntr.Task(ctx, nil)
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require.NoError(t, err)
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_, err = task.Delete(ctx, containerd.WithProcessKill)
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require.NoError(t, err)
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require.NoError(t, cntr.Delete(ctx, containerd.WithSnapshotCleanup))
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t.Logf("Wait until cri-containerd is restarted")
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require.NoError(t, Eventually(func() (bool, error) {
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return ConnectDaemons() == nil, nil
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}, time.Second, 30*time.Second), "wait for cri-containerd to be restarted")
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t.Logf("Check sandbox state after restart")
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loadedSandboxes, err := runtimeService.ListPodSandbox(&runtime.PodSandboxFilter{})
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require.NoError(t, err)
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assert.Empty(t, loadedSandboxes)
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t.Logf("Make sure sandbox root is removed")
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sandboxRoot := filepath.Join(*criContainerdRoot, "sandboxes", sb)
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_, err = os.Stat(sandboxRoot)
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assert.True(t, os.IsNotExist(err))
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}
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