package docker import ( "bufio" "fmt" "github.com/dotcloud/docker/rcli" "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 { 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 } func cmdWait(srv *Server, container *Container) error { stdout, stdoutPipe := io.Pipe() go func() { srv.CmdWait(nil, stdoutPipe, container.Id) }() if _, err := bufio.NewReader(stdout).ReadString('\n'); err != nil { return err } // Cleanup pipes return closeWrap(stdout, stdoutPipe) } // TestRunHostname checks that 'docker run -h' correctly sets a custom hostname func TestRunHostname(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} stdin, _ := io.Pipe() stdout, stdoutPipe := io.Pipe() c := make(chan struct{}) go func() { if err := srv.CmdRun(stdin, rcli.NewDockerLocalConn(stdoutPipe), "-h", "foobar", GetTestImage(runtime).Id, "hostname"); err != nil { t.Fatal(err) } close(c) }() 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", 2*time.Second, func() { <-c cmdWait(srv, srv.runtime.List()[0]) }) } func TestRunExit(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() c1 := make(chan struct{}) go func() { srv.CmdRun(stdin, rcli.NewDockerLocalConn(stdoutPipe), "-i", GetTestImage(runtime).Id, "/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 := runtime.List()[0] // Closing /bin/cat stdin, expect it to exit p, err := container.StdinPipe() if err != nil { t.Fatal(err) } if err := p.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", 2*time.Second, func() { <-c1 cmdWait(srv, container) }) // 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) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() 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. srv.CmdRun(stdin, rcli.NewDockerLocalConn(stdoutPipe), "-i", GetTestImage(runtime).Id, "/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 := runtime.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) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() 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. srv.CmdRun(stdin, rcli.NewDockerLocalConn(stdoutPipe), "-i", "-t", GetTestImage(runtime).Id, "/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 keep stdin out in TTY mode container := runtime.List()[0] // 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) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() ch := make(chan struct{}) go func() { srv.CmdRun(stdin, rcli.NewDockerLocalConn(stdoutPipe), "-i", "-a", "stdin", GetTestImage(runtime).Id, "sh", "-c", "echo hello; cat") close(ch) }() // Send input to the command, close stdin setTimeout(t, "Write timed out", 2*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 := runtime.List()[0] // Check output 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", 2*time.Second, func() { <-ch }) setTimeout(t, "Waiting for command to exit timed out", 2*time.Second, func() { container.Wait() }) // Check logs if cmdLogs, err := container.ReadLog("stdout"); err != nil { t.Fatal(err) } else { if output, err := ioutil.ReadAll(cmdLogs); err != nil { t.Fatal(err) } else { expectedLog := "hello\nhi there\n" if string(output) != expectedLog { t.Fatalf("Unexpected logs: should be '%s', not '%s'\n", expectedLog, output) } } } } // Expected behaviour, the process stays alive when the client disconnects func TestAttachDisconnect(t *testing.T) { runtime, err := newTestRuntime() if err != nil { t.Fatal(err) } defer nuke(runtime) srv := &Server{runtime: runtime} container, err := runtime.Create( &Config{ Image: GetTestImage(runtime).Id, Memory: 33554432, Cmd: []string{"/bin/cat"}, OpenStdin: true, }, ) if err != nil { t.Fatal(err) } defer runtime.Destroy(container) // Start the process if err := container.Start(); err != nil { t.Fatal(err) } stdin, stdinPipe := io.Pipe() stdout, stdoutPipe := io.Pipe() // 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. srv.CmdAttach(stdin, rcli.NewDockerLocalConn(stdoutPipe), 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() }