github.com/boynux/docker@v1.11.0-rc4/integration-cli/docker_cli_attach_test.go (about)

     1  package main
     2  
     3  import (
     4  	"bufio"
     5  	"fmt"
     6  	"io"
     7  	"os/exec"
     8  	"strings"
     9  	"sync"
    10  	"time"
    11  
    12  	"github.com/docker/docker/pkg/integration/checker"
    13  	"github.com/go-check/check"
    14  )
    15  
    16  const attachWait = 5 * time.Second
    17  
    18  func (s *DockerSuite) TestAttachMultipleAndRestart(c *check.C) {
    19  	testRequires(c, DaemonIsLinux)
    20  
    21  	endGroup := &sync.WaitGroup{}
    22  	startGroup := &sync.WaitGroup{}
    23  	endGroup.Add(3)
    24  	startGroup.Add(3)
    25  
    26  	err := waitForContainer("attacher", "-d", "busybox", "/bin/sh", "-c", "while true; do sleep 1; echo hello; done")
    27  	c.Assert(err, check.IsNil)
    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  
    56  			if err := cmd.Start(); err != nil {
    57  				c.Fatal(err)
    58  			}
    59  
    60  			buf := make([]byte, 1024)
    61  
    62  			if _, err := out.Read(buf); err != nil && err != io.EOF {
    63  				c.Fatal(err)
    64  			}
    65  
    66  			startGroup.Done()
    67  
    68  			if !strings.Contains(string(buf), "hello") {
    69  				c.Fatalf("unexpected output %s expected hello\n", string(buf))
    70  			}
    71  		}()
    72  	}
    73  
    74  	select {
    75  	case <-startDone:
    76  	case <-time.After(attachWait):
    77  		c.Fatalf("Attaches did not initialize properly")
    78  	}
    79  
    80  	dockerCmd(c, "kill", "attacher")
    81  
    82  	select {
    83  	case <-endDone:
    84  	case <-time.After(attachWait):
    85  		c.Fatalf("Attaches did not finish properly")
    86  	}
    87  }
    88  
    89  func (s *DockerSuite) TestAttachTTYWithoutStdin(c *check.C) {
    90  	testRequires(c, DaemonIsLinux)
    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 := "cannot enable tty mode"
   107  		if out, _, err := runCommandWithOutput(cmd); err == nil {
   108  			done <- fmt.Errorf("attach should have failed")
   109  			return
   110  		} else if !strings.Contains(out, expected) {
   111  			done <- fmt.Errorf("attach failed with error %q: expected %q", out, expected)
   112  			return
   113  		}
   114  	}()
   115  
   116  	select {
   117  	case err := <-done:
   118  		c.Assert(err, check.IsNil)
   119  	case <-time.After(attachWait):
   120  		c.Fatal("attach is running but should have failed")
   121  	}
   122  }
   123  
   124  func (s *DockerSuite) TestAttachDisconnect(c *check.C) {
   125  	testRequires(c, DaemonIsLinux)
   126  	out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat")
   127  	id := strings.TrimSpace(out)
   128  
   129  	cmd := exec.Command(dockerBinary, "attach", id)
   130  	stdin, err := cmd.StdinPipe()
   131  	if err != nil {
   132  		c.Fatal(err)
   133  	}
   134  	defer stdin.Close()
   135  	stdout, err := cmd.StdoutPipe()
   136  	c.Assert(err, check.IsNil)
   137  	defer stdout.Close()
   138  	c.Assert(cmd.Start(), check.IsNil)
   139  	defer cmd.Process.Kill()
   140  
   141  	_, err = stdin.Write([]byte("hello\n"))
   142  	c.Assert(err, check.IsNil)
   143  	out, err = bufio.NewReader(stdout).ReadString('\n')
   144  	c.Assert(err, check.IsNil)
   145  	c.Assert(strings.TrimSpace(out), check.Equals, "hello")
   146  
   147  	c.Assert(stdin.Close(), check.IsNil)
   148  
   149  	// Expect container to still be running after stdin is closed
   150  	running := inspectField(c, id, "State.Running")
   151  	c.Assert(running, check.Equals, "true")
   152  }
   153  
   154  func (s *DockerSuite) TestAttachPausedContainer(c *check.C) {
   155  	testRequires(c, DaemonIsLinux) // Containers cannot be paused on Windows
   156  	defer unpauseAllContainers()
   157  	dockerCmd(c, "run", "-d", "--name=test", "busybox", "top")
   158  	dockerCmd(c, "pause", "test")
   159  	out, _, err := dockerCmdWithError("attach", "test")
   160  	c.Assert(err, checker.NotNil, check.Commentf(out))
   161  	c.Assert(out, checker.Contains, "You cannot attach to a paused container, unpause it first")
   162  }