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Copy pathdocker_cli_exec_test.go
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package main
import (
"bufio"
"fmt"
"os"
"os/exec"
"reflect"
"sort"
"strings"
"sync"
"testing"
"time"
)
func TestExec(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && sleep 100")
if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
t.Fatal(out, err)
}
execCmd := exec.Command(dockerBinary, "exec", "testing", "cat", "/tmp/file")
out, _, err := runCommandWithOutput(execCmd)
if err != nil {
t.Fatal(out, err)
}
out = strings.Trim(out, "\r\n")
if expected := "test"; out != expected {
t.Errorf("container exec should've printed %q but printed %q", expected, out)
}
deleteAllContainers()
logDone("exec - basic test")
}
func TestExecInteractiveStdinClose(t *testing.T) {
defer deleteAllContainers()
out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "run", "-itd", "busybox", "/bin/cat"))
if err != nil {
t.Fatal(err)
}
contId := strings.TrimSpace(out)
returnchan := make(chan struct{})
go func() {
var err error
cmd := exec.Command(dockerBinary, "exec", "-i", contId, "/bin/ls", "/")
cmd.Stdin = os.Stdin
if err != nil {
t.Fatal(err)
}
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatal(err, out)
}
if string(out) == "" {
t.Fatalf("Output was empty, likely blocked by standard input")
}
returnchan <- struct{}{}
}()
select {
case <-returnchan:
case <-time.After(10 * time.Second):
t.Fatal("timed out running docker exec")
}
logDone("exec - interactive mode closes stdin after execution")
}
func TestExecInteractive(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && sleep 100")
if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
t.Fatal(out, err)
}
execCmd := exec.Command(dockerBinary, "exec", "-i", "testing", "sh")
stdin, err := execCmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
stdout, err := execCmd.StdoutPipe()
if err != nil {
t.Fatal(err)
}
if err := execCmd.Start(); err != nil {
t.Fatal(err)
}
if _, err := stdin.Write([]byte("cat /tmp/file\n")); err != nil {
t.Fatal(err)
}
r := bufio.NewReader(stdout)
line, err := r.ReadString('\n')
if err != nil {
t.Fatal(err)
}
line = strings.TrimSpace(line)
if line != "test" {
t.Fatalf("Output should be 'test', got '%q'", line)
}
if err := stdin.Close(); err != nil {
t.Fatal(err)
}
finish := make(chan struct{})
go func() {
if err := execCmd.Wait(); err != nil {
t.Fatal(err)
}
close(finish)
}()
select {
case <-finish:
case <-time.After(1 * time.Second):
t.Fatal("docker exec failed to exit on stdin close")
}
deleteAllContainers()
logDone("exec - Interactive test")
}
func TestExecAfterContainerRestart(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-d", "busybox", "top")
out, _, err := runCommandWithOutput(runCmd)
if err != nil {
t.Fatal(out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
runCmd = exec.Command(dockerBinary, "restart", cleanedContainerID)
if out, _, err = runCommandWithOutput(runCmd); err != nil {
t.Fatal(out, err)
}
runCmd = exec.Command(dockerBinary, "exec", cleanedContainerID, "echo", "hello")
out, _, err = runCommandWithOutput(runCmd)
if err != nil {
t.Fatal(out, err)
}
outStr := strings.TrimSpace(out)
if outStr != "hello" {
t.Errorf("container should've printed hello, instead printed %q", outStr)
}
deleteAllContainers()
logDone("exec - exec running container after container restart")
}
func TestExecAfterDaemonRestart(t *testing.T) {
d := NewDaemon(t)
if err := d.StartWithBusybox(); err != nil {
t.Fatalf("Could not start daemon with busybox: %v", err)
}
defer d.Stop()
if out, err := d.Cmd("run", "-d", "--name", "top", "-p", "80", "busybox:latest", "top"); err != nil {
t.Fatalf("Could not run top: err=%v\n%s", err, out)
}
if err := d.Restart(); err != nil {
t.Fatalf("Could not restart daemon: %v", err)
}
if out, err := d.Cmd("start", "top"); err != nil {
t.Fatalf("Could not start top after daemon restart: err=%v\n%s", err, out)
}
out, err := d.Cmd("exec", "top", "echo", "hello")
if err != nil {
t.Fatalf("Could not exec on container top: err=%v\n%s", err, out)
}
outStr := strings.TrimSpace(string(out))
if outStr != "hello" {
t.Errorf("container should've printed hello, instead printed %q", outStr)
}
logDone("exec - exec running container after daemon restart")
}
// Regresssion test for #9155, #9044
func TestExecEnv(t *testing.T) {
defer deleteAllContainers()
runCmd := exec.Command(dockerBinary, "run",
"-e", "LALA=value1",
"-e", "LALA=value2",
"-d", "--name", "testing", "busybox", "top")
if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
t.Fatal(out, err)
}
execCmd := exec.Command(dockerBinary, "exec", "testing", "env")
out, _, err := runCommandWithOutput(execCmd)
if err != nil {
t.Fatal(out, err)
}
if strings.Contains(out, "LALA=value1") ||
!strings.Contains(out, "LALA=value2") ||
!strings.Contains(out, "HOME=/root") {
t.Errorf("exec env(%q), expect %q, %q", out, "LALA=value2", "HOME=/root")
}
logDone("exec - exec inherits correct env")
}
func TestExecExitStatus(t *testing.T) {
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "top", "busybox", "top")
if out, _, _, err := runCommandWithStdoutStderr(runCmd); err != nil {
t.Fatal(out, err)
}
// Test normal (non-detached) case first
cmd := exec.Command(dockerBinary, "exec", "top", "sh", "-c", "exit 23")
ec, _ := runCommand(cmd)
if ec != 23 {
t.Fatalf("Should have had an ExitCode of 23, not: %d", ec)
}
logDone("exec - exec non-zero ExitStatus")
}
func TestExecPausedContainer(t *testing.T) {
defer deleteAllContainers()
defer unpauseAllContainers()
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top")
out, _, err := runCommandWithOutput(runCmd)
if err != nil {
t.Fatal(out, err)
}
ContainerID := stripTrailingCharacters(out)
pausedCmd := exec.Command(dockerBinary, "pause", "testing")
out, _, _, err = runCommandWithStdoutStderr(pausedCmd)
if err != nil {
t.Fatal(out, err)
}
execCmd := exec.Command(dockerBinary, "exec", "-i", "-t", ContainerID, "echo", "hello")
out, _, err = runCommandWithOutput(execCmd)
if err == nil {
t.Fatal("container should fail to exec new command if it is paused")
}
expected := ContainerID + " is paused, unpause the container before exec"
if !strings.Contains(out, expected) {
t.Fatal("container should not exec new command if it is paused")
}
logDone("exec - exec should not exec a pause container")
}
// regression test for #9476
func TestExecTtyCloseStdin(t *testing.T) {
defer deleteAllContainers()
cmd := exec.Command(dockerBinary, "run", "-d", "-it", "--name", "exec_tty_stdin", "busybox")
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatal(out, err)
}
cmd = exec.Command(dockerBinary, "exec", "-i", "exec_tty_stdin", "cat")
stdinRw, err := cmd.StdinPipe()
if err != nil {
t.Fatal(err)
}
stdinRw.Write([]byte("test"))
stdinRw.Close()
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatal(out, err)
}
cmd = exec.Command(dockerBinary, "top", "exec_tty_stdin")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatal(out, err)
}
outArr := strings.Split(out, "\n")
if len(outArr) > 3 || strings.Contains(out, "nsenter-exec") {
// This is the really bad part
if out, _, err := runCommandWithOutput(exec.Command(dockerBinary, "rm", "-f", "exec_tty_stdin")); err != nil {
t.Fatal(out, err)
}
t.Fatalf("exec process left running\n\t %s", out)
}
logDone("exec - stdin is closed properly with tty enabled")
}
func TestExecTtyWithoutStdin(t *testing.T) {
defer deleteAllContainers()
cmd := exec.Command(dockerBinary, "run", "-d", "-ti", "busybox")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatalf("failed to start container: %v (%v)", out, err)
}
id := strings.TrimSpace(out)
if err := waitRun(id); err != nil {
t.Fatal(err)
}
defer func() {
cmd := exec.Command(dockerBinary, "kill", id)
if out, _, err := runCommandWithOutput(cmd); err != nil {
t.Fatalf("failed to kill container: %v (%v)", out, err)
}
}()
done := make(chan struct{})
go func() {
defer close(done)
cmd := exec.Command(dockerBinary, "exec", "-ti", id, "true")
if _, err := cmd.StdinPipe(); err != nil {
t.Fatal(err)
}
expected := "cannot enable tty mode"
if out, _, err := runCommandWithOutput(cmd); err == nil {
t.Fatal("exec should have failed")
} else if !strings.Contains(out, expected) {
t.Fatalf("exec failed with error %q: expected %q", out, expected)
}
}()
select {
case <-done:
case <-time.After(3 * time.Second):
t.Fatal("exec is running but should have failed")
}
logDone("exec - forbid piped stdin to tty enabled container")
}
func TestExecParseError(t *testing.T) {
defer deleteAllContainers()
runCmd := exec.Command(dockerBinary, "run", "-d", "--name", "top", "busybox", "top")
if out, _, err := runCommandWithOutput(runCmd); err != nil {
t.Fatal(out, err)
}
// Test normal (non-detached) case first
cmd := exec.Command(dockerBinary, "exec", "top")
if _, stderr, code, err := runCommandWithStdoutStderr(cmd); err == nil || !strings.Contains(stderr, "See '"+dockerBinary+" exec --help'") || code == 0 {
t.Fatalf("Should have thrown error & point to help: %s", stderr)
}
logDone("exec - error on parseExec should point to help")
}
func TestExecStopNotHanging(t *testing.T) {
defer deleteAllContainers()
if out, err := exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top").CombinedOutput(); err != nil {
t.Fatal(out, err)
}
if err := exec.Command(dockerBinary, "exec", "testing", "top").Start(); err != nil {
t.Fatal(err)
}
wait := make(chan struct{})
go func() {
if out, err := exec.Command(dockerBinary, "stop", "testing").CombinedOutput(); err != nil {
t.Fatal(out, err)
}
close(wait)
}()
select {
case <-time.After(3 * time.Second):
t.Fatal("Container stop timed out")
case <-wait:
}
logDone("exec - container with exec not hanging on stop")
}
func TestExecCgroup(t *testing.T) {
defer deleteAllContainers()
var cmd *exec.Cmd
cmd = exec.Command(dockerBinary, "run", "-d", "--name", "testing", "busybox", "top")
_, err := runCommand(cmd)
if err != nil {
t.Fatal(err)
}
cmd = exec.Command(dockerBinary, "exec", "testing", "cat", "/proc/1/cgroup")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatal(out, err)
}
containerCgroups := sort.StringSlice(strings.Split(string(out), "\n"))
var wg sync.WaitGroup
var s sync.Mutex
execCgroups := []sort.StringSlice{}
// exec a few times concurrently to get consistent failure
for i := 0; i < 5; i++ {
wg.Add(1)
go func() {
cmd = exec.Command(dockerBinary, "exec", "testing", "cat", "/proc/self/cgroup")
out, _, err := runCommandWithOutput(cmd)
if err != nil {
t.Fatal(out, err)
}
cg := sort.StringSlice(strings.Split(string(out), "\n"))
s.Lock()
execCgroups = append(execCgroups, cg)
s.Unlock()
wg.Done()
}()
}
wg.Wait()
for _, cg := range execCgroups {
if !reflect.DeepEqual(cg, containerCgroups) {
fmt.Println("exec cgroups:")
for _, name := range cg {
fmt.Printf(" %s\n", name)
}
fmt.Println("container cgroups:")
for _, name := range containerCgroups {
fmt.Printf(" %s\n", name)
}
t.Fatal("cgroups mismatched")
}
}
logDone("exec - exec has the container cgroups")
}
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