package container // import "github.com/docker/docker/integration/container" import ( "context" "fmt" "os/exec" "regexp" "sort" "testing" "time" "github.com/docker/docker/api/types" mounttypes "github.com/docker/docker/api/types/mount" "github.com/docker/docker/client" "github.com/docker/docker/integration/internal/container" "github.com/docker/docker/testutil/request" "gotest.tools/assert" is "gotest.tools/assert/cmp" "gotest.tools/poll" "gotest.tools/skip" ) func containerExec(t *testing.T, client client.APIClient, cID string, cmd []string) { t.Logf("Exec: %s", cmd) ctx := context.Background() r, err := container.Exec(ctx, client, cID, cmd) assert.NilError(t, err) t.Log(r.Combined()) assert.Equal(t, r.ExitCode, 0) } func TestCheckpoint(t *testing.T) { t.Skip("TestCheckpoint is broken; see https://github.com/moby/moby/issues/38963") skip.If(t, testEnv.DaemonInfo.OSType == "windows") skip.If(t, !testEnv.DaemonInfo.ExperimentalBuild) defer setupTest(t)() cmd := exec.Command("criu", "check") stdoutStderr, err := cmd.CombinedOutput() t.Logf("%s", stdoutStderr) assert.NilError(t, err) ctx := context.Background() client := request.NewAPIClient(t) mnt := mounttypes.Mount{ Type: mounttypes.TypeTmpfs, Target: "/tmp", } t.Log("Start a container") cID := container.Run(ctx, t, client, container.WithMount(mnt)) poll.WaitOn(t, container.IsInState(ctx, client, cID, "running"), poll.WithDelay(100*time.Millisecond), ) cptOpt := types.CheckpointCreateOptions{ Exit: false, CheckpointID: "test", } { // FIXME: ipv6 iptables modules are not uploaded in the test environment cmd := exec.Command("bash", "-c", "set -x; "+ "mount --bind $(type -P true) $(type -P ip6tables-restore) && "+ "mount --bind $(type -P true) $(type -P ip6tables-save)") stdoutStderr, err = cmd.CombinedOutput() t.Logf("%s", stdoutStderr) assert.NilError(t, err) defer func() { cmd := exec.Command("bash", "-c", "set -x; "+ "umount -c -i -l $(type -P ip6tables-restore); "+ "umount -c -i -l $(type -P ip6tables-save)") stdoutStderr, err = cmd.CombinedOutput() t.Logf("%s", stdoutStderr) assert.NilError(t, err) }() } t.Log("Do a checkpoint and leave the container running") err = client.CheckpointCreate(ctx, cID, cptOpt) if err != nil { // An error can contain a path to a dump file t.Logf("%s", err) re := regexp.MustCompile("path= (.*): ") m := re.FindStringSubmatch(fmt.Sprintf("%s", err)) if len(m) >= 2 { dumpLog := m[1] t.Logf("%s", dumpLog) cmd := exec.Command("cat", dumpLog) stdoutStderr, err = cmd.CombinedOutput() t.Logf("%s", stdoutStderr) } } assert.NilError(t, err) inspect, err := client.ContainerInspect(ctx, cID) assert.NilError(t, err) assert.Check(t, is.Equal(true, inspect.State.Running)) checkpoints, err := client.CheckpointList(ctx, cID, types.CheckpointListOptions{}) assert.NilError(t, err) assert.Equal(t, len(checkpoints), 1) assert.Equal(t, checkpoints[0].Name, "test") // Create a test file on a tmpfs mount. containerExec(t, client, cID, []string{"touch", "/tmp/test-file"}) // Do a second checkpoint cptOpt = types.CheckpointCreateOptions{ Exit: true, CheckpointID: "test2", } t.Log("Do a checkpoint and stop the container") err = client.CheckpointCreate(ctx, cID, cptOpt) assert.NilError(t, err) poll.WaitOn(t, container.IsInState(ctx, client, cID, "exited"), poll.WithDelay(100*time.Millisecond), ) inspect, err = client.ContainerInspect(ctx, cID) assert.NilError(t, err) assert.Check(t, is.Equal(false, inspect.State.Running)) // Check that both checkpoints are listed. checkpoints, err = client.CheckpointList(ctx, cID, types.CheckpointListOptions{}) assert.NilError(t, err) assert.Equal(t, len(checkpoints), 2) cptNames := make([]string, 2) for i, c := range checkpoints { cptNames[i] = c.Name } sort.Strings(cptNames) assert.Equal(t, cptNames[0], "test") assert.Equal(t, cptNames[1], "test2") // Restore the container from a second checkpoint. startOpt := types.ContainerStartOptions{ CheckpointID: "test2", } t.Log("Restore the container") err = client.ContainerStart(ctx, cID, startOpt) assert.NilError(t, err) inspect, err = client.ContainerInspect(ctx, cID) assert.NilError(t, err) assert.Check(t, is.Equal(true, inspect.State.Running)) // Check that the test file has been restored. containerExec(t, client, cID, []string{"test", "-f", "/tmp/test-file"}) for _, id := range []string{"test", "test2"} { cptDelOpt := types.CheckpointDeleteOptions{ CheckpointID: id, } err = client.CheckpointDelete(ctx, cID, cptDelOpt) assert.NilError(t, err) } }