github.com/jiasir/docker@v1.3.3-0.20170609024000-252e610103e7/integration-cli/docker_cli_attach_test.go (about) 1 package main 2 3 import ( 4 "bufio" 5 "fmt" 6 "io" 7 "os/exec" 8 "runtime" 9 "strings" 10 "sync" 11 "time" 12 13 "github.com/docker/docker/integration-cli/cli" 14 icmd "github.com/docker/docker/pkg/testutil/cmd" 15 "github.com/go-check/check" 16 ) 17 18 const attachWait = 5 * time.Second 19 20 func (s *DockerSuite) TestAttachMultipleAndRestart(c *check.C) { 21 endGroup := &sync.WaitGroup{} 22 startGroup := &sync.WaitGroup{} 23 endGroup.Add(3) 24 startGroup.Add(3) 25 26 cli.DockerCmd(c, "run", "--name", "attacher", "-d", "busybox", "/bin/sh", "-c", "while true; do sleep 1; echo hello; done") 27 cli.WaitRun(c, "attacher") 28 29 startDone := make(chan struct{}) 30 endDone := make(chan struct{}) 31 32 go func() { 33 endGroup.Wait() 34 close(endDone) 35 }() 36 37 go func() { 38 startGroup.Wait() 39 close(startDone) 40 }() 41 42 for i := 0; i < 3; i++ { 43 go func() { 44 cmd := exec.Command(dockerBinary, "attach", "attacher") 45 46 defer func() { 47 cmd.Wait() 48 endGroup.Done() 49 }() 50 51 out, err := cmd.StdoutPipe() 52 if err != nil { 53 c.Fatal(err) 54 } 55 defer out.Close() 56 57 if err := cmd.Start(); err != nil { 58 c.Fatal(err) 59 } 60 61 buf := make([]byte, 1024) 62 63 if _, err := out.Read(buf); err != nil && err != io.EOF { 64 c.Fatal(err) 65 } 66 67 startGroup.Done() 68 69 if !strings.Contains(string(buf), "hello") { 70 c.Fatalf("unexpected output %s expected hello\n", string(buf)) 71 } 72 }() 73 } 74 75 select { 76 case <-startDone: 77 case <-time.After(attachWait): 78 c.Fatalf("Attaches did not initialize properly") 79 } 80 81 cli.DockerCmd(c, "kill", "attacher") 82 83 select { 84 case <-endDone: 85 case <-time.After(attachWait): 86 c.Fatalf("Attaches did not finish properly") 87 } 88 } 89 90 func (s *DockerSuite) TestAttachTTYWithoutStdin(c *check.C) { 91 out, _ := dockerCmd(c, "run", "-d", "-ti", "busybox") 92 93 id := strings.TrimSpace(out) 94 c.Assert(waitRun(id), check.IsNil) 95 96 done := make(chan error) 97 go func() { 98 defer close(done) 99 100 cmd := exec.Command(dockerBinary, "attach", id) 101 if _, err := cmd.StdinPipe(); err != nil { 102 done <- err 103 return 104 } 105 106 expected := "the input device is not a TTY" 107 if runtime.GOOS == "windows" { 108 expected += ". If you are using mintty, try prefixing the command with 'winpty'" 109 } 110 if out, _, err := runCommandWithOutput(cmd); err == nil { 111 done <- fmt.Errorf("attach should have failed") 112 return 113 } else if !strings.Contains(out, expected) { 114 done <- fmt.Errorf("attach failed with error %q: expected %q", out, expected) 115 return 116 } 117 }() 118 119 select { 120 case err := <-done: 121 c.Assert(err, check.IsNil) 122 case <-time.After(attachWait): 123 c.Fatal("attach is running but should have failed") 124 } 125 } 126 127 func (s *DockerSuite) TestAttachDisconnect(c *check.C) { 128 testRequires(c, DaemonIsLinux) 129 out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat") 130 id := strings.TrimSpace(out) 131 132 cmd := exec.Command(dockerBinary, "attach", id) 133 stdin, err := cmd.StdinPipe() 134 if err != nil { 135 c.Fatal(err) 136 } 137 defer stdin.Close() 138 stdout, err := cmd.StdoutPipe() 139 c.Assert(err, check.IsNil) 140 defer stdout.Close() 141 c.Assert(cmd.Start(), check.IsNil) 142 defer cmd.Process.Kill() 143 144 _, err = stdin.Write([]byte("hello\n")) 145 c.Assert(err, check.IsNil) 146 out, err = bufio.NewReader(stdout).ReadString('\n') 147 c.Assert(err, check.IsNil) 148 c.Assert(strings.TrimSpace(out), check.Equals, "hello") 149 150 c.Assert(stdin.Close(), check.IsNil) 151 152 // Expect container to still be running after stdin is closed 153 running := inspectField(c, id, "State.Running") 154 c.Assert(running, check.Equals, "true") 155 } 156 157 func (s *DockerSuite) TestAttachPausedContainer(c *check.C) { 158 testRequires(c, IsPausable) 159 runSleepingContainer(c, "-d", "--name=test") 160 dockerCmd(c, "pause", "test") 161 162 result := dockerCmdWithResult("attach", "test") 163 c.Assert(result, icmd.Matches, icmd.Expected{ 164 Error: "exit status 1", 165 ExitCode: 1, 166 Err: "You cannot attach to a paused container, unpause it first", 167 }) 168 }