package docker import ( "bufio" "fmt" "github.com/dotcloud/docker/utils" "io" "io/ioutil" "strings" "testing" "time" ) func closeWrap(args ...io.Closer) error { e := false ret := fmt.Errorf("Error closing elements") for _, c := range args { if err := c.Close(); err != nil { e = true ret = fmt.Errorf("%s\n%s", ret, err) } } if e { return ret } return nil } func setTimeout(t *testing.T, msg string, d time.Duration, f func()) { c := make(chan bool) // Make sure we are not too long go func() { time.Sleep(d) c <- true }() go func() { f() c <- false }() if <-c && msg != "" { t.Fatal(msg) } } func assertPipe(input, output string, r io.Reader, w io.Writer, count int) error { for i := 0; i < count; i++ { if _, err := w.Write([]byte(input)); err != nil { return err } o, err := bufio.NewReader(r).ReadString('\n') if err != nil { return err } if strings.Trim(o, " \r\n") != output { return fmt.Errorf("Unexpected output. Expected [%s], received [%s]", output, o) } } return nil } // TestRunHostname checks that 'docker run -h' correctly sets a custom hostname func TestRunHostname(t *testing.T) { stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(nil, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) c := make(chan struct{}) go func() { defer close(c) if err := cli.CmdRun("-h", "foobar", unitTestImageID, "hostname"); err != nil { t.Fatal(err) } }() setTimeout(t, "Reading command output time out", 2*time.Second, func() { cmdOutput, err := bufio.NewReader(stdout).ReadString('\n') if err != nil { t.Fatal(err) } if cmdOutput != "foobar\n" { t.Fatalf("'hostname' should display '%s', not '%s'", "foobar\n", cmdOutput) } }) setTimeout(t, "CmdRun timed out", 5*time.Second, func() { <-c }) } func TestRunExit(t *testing.T) { stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) c1 := make(chan struct{}) go func() { cli.CmdRun("-i", unitTestImageID, "/bin/cat") close(c1) }() setTimeout(t, "Read/Write assertion timed out", 2*time.Second, func() { if err := assertPipe("hello\n", "hello", stdout, stdinPipe, 15); err != nil { t.Fatal(err) } }) container := globalRuntime.List()[0] // Closing /bin/cat stdin, expect it to exit if err := stdin.Close(); err != nil { t.Fatal(err) } // as the process exited, CmdRun must finish and unblock. Wait for it setTimeout(t, "Waiting for CmdRun timed out", 10*time.Second, func() { <-c1 go func() { cli.CmdWait(container.ID) }() if _, err := bufio.NewReader(stdout).ReadString('\n'); err != nil { t.Fatal(err) } }) // Make sure that the client has been disconnected setTimeout(t, "The client should have been disconnected once the remote process exited.", 2*time.Second, func() { // Expecting pipe i/o error, just check that read does not block stdin.Read([]byte{}) }) // Cleanup pipes if err := closeWrap(stdin, stdinPipe, stdout, stdoutPipe); err != nil { t.Fatal(err) } } // Expected behaviour: the process dies when the client disconnects func TestRunDisconnect(t *testing.T) { stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) c1 := make(chan struct{}) go func() { // We're simulating a disconnect so the return value doesn't matter. What matters is the // fact that CmdRun returns. cli.CmdRun("-i", unitTestImageID, "/bin/cat") close(c1) }() setTimeout(t, "Read/Write assertion timed out", 2*time.Second, func() { if err := assertPipe("hello\n", "hello", stdout, stdinPipe, 15); err != nil { t.Fatal(err) } }) // Close pipes (simulate disconnect) if err := closeWrap(stdin, stdinPipe, stdout, stdoutPipe); err != nil { t.Fatal(err) } // as the pipes are close, we expect the process to die, // therefore CmdRun to unblock. Wait for CmdRun setTimeout(t, "Waiting for CmdRun timed out", 2*time.Second, func() { <-c1 }) // Client disconnect after run -i should cause stdin to be closed, which should // cause /bin/cat to exit. setTimeout(t, "Waiting for /bin/cat to exit timed out", 2*time.Second, func() { container := globalRuntime.List()[0] container.Wait() if container.State.Running { t.Fatalf("/bin/cat is still running after closing stdin") } }) } // Expected behaviour: the process dies when the client disconnects func TestRunDisconnectTty(t *testing.T) { stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) c1 := make(chan struct{}) go func() { // We're simulating a disconnect so the return value doesn't matter. What matters is the // fact that CmdRun returns. if err := cli.CmdRun("-i", "-t", unitTestImageID, "/bin/cat"); err != nil { utils.Debugf("Error CmdRun: %s\n", err) } close(c1) }() setTimeout(t, "Waiting for the container to be started timed out", 10*time.Second, func() { for { // Client disconnect after run -i should keep stdin out in TTY mode l := globalRuntime.List() if len(l) == 1 && l[0].State.Running { break } time.Sleep(10 * time.Millisecond) } }) // Client disconnect after run -i should keep stdin out in TTY mode container := globalRuntime.List()[0] setTimeout(t, "Read/Write assertion timed out", 2000*time.Second, func() { if err := assertPipe("hello\n", "hello", stdout, stdinPipe, 15); err != nil { t.Fatal(err) } }) // Close pipes (simulate disconnect) if err := closeWrap(stdin, stdinPipe, stdout, stdoutPipe); err != nil { t.Fatal(err) } // In tty mode, we expect the process to stay alive even after client's stdin closes. // Do not wait for run to finish // Give some time to monitor to do his thing container.WaitTimeout(500 * time.Millisecond) if !container.State.Running { t.Fatalf("/bin/cat should still be running after closing stdin (tty mode)") } } // TestAttachStdin checks attaching to stdin without stdout and stderr. // 'docker run -i -a stdin' should sends the client's stdin to the command, // then detach from it and print the container id. func TestRunAttachStdin(t *testing.T) { stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) ch := make(chan struct{}) go func() { defer close(ch) cli.CmdRun("-i", "-a", "stdin", unitTestImageID, "sh", "-c", "echo hello && cat") }() // Send input to the command, close stdin setTimeout(t, "Write timed out", 10*time.Second, func() { if _, err := stdinPipe.Write([]byte("hi there\n")); err != nil { t.Fatal(err) } if err := stdinPipe.Close(); err != nil { t.Fatal(err) } }) container := globalRuntime.List()[0] // Check output setTimeout(t, "Reading command output time out", 10*time.Second, func() { cmdOutput, err := bufio.NewReader(stdout).ReadString('\n') if err != nil { t.Fatal(err) } if cmdOutput != container.ShortID()+"\n" { t.Fatalf("Wrong output: should be '%s', not '%s'\n", container.ShortID()+"\n", cmdOutput) } }) // wait for CmdRun to return setTimeout(t, "Waiting for CmdRun timed out", 5*time.Second, func() { // Unblock hijack end stdout.Read([]byte{}) <-ch }) setTimeout(t, "Waiting for command to exit timed out", 5*time.Second, func() { container.Wait() }) // Check logs if cmdLogs, err := container.ReadLog("json"); err != nil { t.Fatal(err) } else { if output, err := ioutil.ReadAll(cmdLogs); err != nil { t.Fatal(err) } else { expectedLogs := []string{"{\"log\":\"hello\\n\",\"stream\":\"stdout\"", "{\"log\":\"hi there\\n\",\"stream\":\"stdout\""} for _, expectedLog := range expectedLogs { if !strings.Contains(string(output), expectedLog) { t.Fatalf("Unexpected logs: should contains '%s', it is not '%s'\n", expectedLog, output) } } } } } // Expected behaviour, the process stays alive when the client disconnects func TestAttachDisconnect(t *testing.T) { stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() cli := NewDockerCli(stdin, stdoutPipe, ioutil.Discard, testDaemonProto, testDaemonAddr) defer cleanup(globalRuntime) go func() { // Start a process in daemon mode if err := cli.CmdRun("-d", "-i", unitTestImageID, "/bin/cat"); err != nil { utils.Debugf("Error CmdRun: %s\n", err) } }() setTimeout(t, "Waiting for CmdRun timed out", 10*time.Second, func() { if _, err := bufio.NewReader(stdout).ReadString('\n'); err != nil { t.Fatal(err) } }) setTimeout(t, "Waiting for the container to be started timed out", 10*time.Second, func() { for { l := globalRuntime.List() if len(l) == 1 && l[0].State.Running { break } time.Sleep(10 * time.Millisecond) } }) container := globalRuntime.List()[0] // Attach to it c1 := make(chan struct{}) go func() { // We're simulating a disconnect so the return value doesn't matter. What matters is the // fact that CmdAttach returns. cli.CmdAttach(container.ID) close(c1) }() setTimeout(t, "First read/write assertion timed out", 2*time.Second, func() { if err := assertPipe("hello\n", "hello", stdout, stdinPipe, 15); err != nil { t.Fatal(err) } }) // Close pipes (client disconnects) if err := closeWrap(stdin, stdinPipe, stdout, stdoutPipe); err != nil { t.Fatal(err) } // Wait for attach to finish, the client disconnected, therefore, Attach finished his job setTimeout(t, "Waiting for CmdAttach timed out", 2*time.Second, func() { <-c1 }) // We closed stdin, expect /bin/cat to still be running // Wait a little bit to make sure container.monitor() did his thing err := container.WaitTimeout(500 * time.Millisecond) if err == nil || !container.State.Running { t.Fatalf("/bin/cat is not running after closing stdin") } // Try to avoid the timeoout in destroy. Best effort, don't check error cStdin, _ := container.StdinPipe() cStdin.Close() container.Wait() }