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moby--moby/commands_test.go

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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
}()
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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()
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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()
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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")
}
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// Try to avoid the timeout in destroy. Best effort, don't check error
cStdin, _ := container.StdinPipe()
cStdin.Close()
container.Wait()
}