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package main
import ( |
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"bufio" |
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"fmt" |
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"io" |
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"os/exec"
"strings"
"sync"
"time" |
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"github.com/go-check/check" |
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)
|
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const attachWait = 5 * time.Second
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func (s *DockerSuite) TestAttachMultipleAndRestart(c *check.C) { |
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endGroup := &sync.WaitGroup{}
startGroup := &sync.WaitGroup{}
endGroup.Add(3)
startGroup.Add(3)
if err := waitForContainer("attacher", "-d", "busybox", "/bin/sh", "-c", "while true; do sleep 1; echo hello; done"); err != nil { |
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c.Fatal(err) |
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}
startDone := make(chan struct{})
endDone := make(chan struct{})
go func() {
endGroup.Wait()
close(endDone) |
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}()
|
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go func() { |
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startGroup.Wait()
close(startDone) |
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}()
for i := 0; i < 3; i++ {
go func() { |
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cmd := exec.Command(dockerBinary, "attach", "attacher") |
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|
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defer func() { |
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cmd.Wait() |
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endGroup.Done()
}()
|
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out, err := cmd.StdoutPipe() |
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if err != nil { |
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c.Fatal(err) |
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}
|
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if err := cmd.Start(); err != nil {
c.Fatal(err) |
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} |
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buf := make([]byte, 1024)
if _, err := out.Read(buf); err != nil && err != io.EOF { |
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c.Fatal(err) |
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}
startGroup.Done()
if !strings.Contains(string(buf), "hello") { |
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c.Fatalf("unexpected output %s expected hello\n", string(buf)) |
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}
}()
}
|
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select {
case <-startDone:
case <-time.After(attachWait): |
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c.Fatalf("Attaches did not initialize properly") |
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}
cmd := exec.Command(dockerBinary, "kill", "attacher")
if _, err := runCommand(cmd); err != nil { |
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c.Fatal(err) |
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}
select {
case <-endDone:
case <-time.After(attachWait): |
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c.Fatalf("Attaches did not finish properly") |
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} |
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} |
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|
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func (s *DockerSuite) TestAttachTtyWithoutStdin(c *check.C) { |
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cmd := exec.Command(dockerBinary, "run", "-d", "-ti", "busybox")
out, _, err := runCommandWithOutput(cmd)
if err != nil { |
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c.Fatalf("failed to start container: %v (%v)", out, err) |
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}
id := strings.TrimSpace(out)
if err := waitRun(id); err != nil { |
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c.Fatal(err) |
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}
defer func() {
cmd := exec.Command(dockerBinary, "kill", id)
if out, _, err := runCommandWithOutput(cmd); err != nil { |
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c.Fatalf("failed to kill container: %v (%v)", out, err) |
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}
}()
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done := make(chan error) |
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go func() {
defer close(done)
cmd := exec.Command(dockerBinary, "attach", id)
if _, err := cmd.StdinPipe(); err != nil { |
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done <- err
return |
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}
expected := "cannot enable tty mode"
if out, _, err := runCommandWithOutput(cmd); err == nil { |
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done <- fmt.Errorf("attach should have failed")
return |
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} else if !strings.Contains(out, expected) { |
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done <- fmt.Errorf("attach failed with error %q: expected %q", out, expected)
return |
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}
}()
select { |
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case err := <-done:
c.Assert(err, check.IsNil) |
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case <-time.After(attachWait): |
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c.Fatal("attach is running but should have failed") |
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}
} |
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|
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func (s *DockerSuite) TestAttachDisconnect(c *check.C) {
out, _ := dockerCmd(c, "run", "-di", "busybox", "/bin/cat") |
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id := strings.TrimSpace(out)
cmd := exec.Command(dockerBinary, "attach", id)
stdin, err := cmd.StdinPipe()
if err != nil { |
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c.Fatal(err) |
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}
defer stdin.Close()
stdout, err := cmd.StdoutPipe()
if err != nil { |
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c.Fatal(err) |
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}
defer stdout.Close()
if err := cmd.Start(); err != nil { |
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c.Fatal(err) |
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}
defer cmd.Process.Kill()
if _, err := stdin.Write([]byte("hello\n")); err != nil { |
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c.Fatal(err) |
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}
out, err = bufio.NewReader(stdout).ReadString('\n')
if err != nil { |
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c.Fatal(err) |
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}
if strings.TrimSpace(out) != "hello" { |
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c.Fatalf("expected 'hello', got %q", out) |
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}
if err := stdin.Close(); err != nil { |
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c.Fatal(err) |
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}
// Expect container to still be running after stdin is closed
running, err := inspectField(id, "State.Running")
if err != nil { |
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c.Fatal(err) |
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}
if running != "true" { |
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c.Fatal("expected container to still be running") |
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}
} |