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526 lines
18 KiB
Go
526 lines
18 KiB
Go
// +build !test_no_exec
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package main
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import (
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"bufio"
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"fmt"
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"net/http"
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"os"
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"os/exec"
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"path/filepath"
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"reflect"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/docker/docker/pkg/integration/checker"
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"github.com/go-check/check"
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)
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func (s *DockerSuite) TestExec(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && top")
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out, _ := dockerCmd(c, "exec", "testing", "cat", "/tmp/file")
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out = strings.Trim(out, "\r\n")
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c.Assert(out, checker.Equals, "test")
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}
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func (s *DockerSuite) TestExecInteractive(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "testing", "busybox", "sh", "-c", "echo test > /tmp/file && top")
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execCmd := exec.Command(dockerBinary, "exec", "-i", "testing", "sh")
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stdin, err := execCmd.StdinPipe()
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c.Assert(err, checker.IsNil)
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stdout, err := execCmd.StdoutPipe()
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c.Assert(err, checker.IsNil)
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err = execCmd.Start()
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c.Assert(err, checker.IsNil)
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_, err = stdin.Write([]byte("cat /tmp/file\n"))
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c.Assert(err, checker.IsNil)
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r := bufio.NewReader(stdout)
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line, err := r.ReadString('\n')
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c.Assert(err, checker.IsNil)
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line = strings.TrimSpace(line)
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c.Assert(line, checker.Equals, "test")
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err = stdin.Close()
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c.Assert(err, checker.IsNil)
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errChan := make(chan error)
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go func() {
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errChan <- execCmd.Wait()
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close(errChan)
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}()
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select {
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case err := <-errChan:
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c.Assert(err, checker.IsNil)
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case <-time.After(1 * time.Second):
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c.Fatal("docker exec failed to exit on stdin close")
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}
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}
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func (s *DockerSuite) TestExecAfterContainerRestart(c *check.C) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
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cleanedContainerID := strings.TrimSpace(out)
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c.Assert(waitRun(cleanedContainerID), check.IsNil)
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dockerCmd(c, "restart", cleanedContainerID)
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c.Assert(waitRun(cleanedContainerID), check.IsNil)
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out, _ = dockerCmd(c, "exec", cleanedContainerID, "echo", "hello")
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outStr := strings.TrimSpace(out)
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c.Assert(outStr, checker.Equals, "hello")
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}
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func (s *DockerDaemonSuite) TestExecAfterDaemonRestart(c *check.C) {
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testRequires(c, DaemonIsLinux)
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testRequires(c, SameHostDaemon)
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err := s.d.StartWithBusybox()
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c.Assert(err, checker.IsNil)
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out, err := s.d.Cmd("run", "-d", "--name", "top", "-p", "80", "busybox:latest", "top")
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c.Assert(err, checker.IsNil, check.Commentf("Could not run top: %s", out))
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err = s.d.Restart()
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c.Assert(err, checker.IsNil, check.Commentf("Could not restart daemon"))
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out, err = s.d.Cmd("start", "top")
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c.Assert(err, checker.IsNil, check.Commentf("Could not start top after daemon restart: %s", out))
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out, err = s.d.Cmd("exec", "top", "echo", "hello")
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c.Assert(err, checker.IsNil, check.Commentf("Could not exec on container top: %s", out))
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outStr := strings.TrimSpace(string(out))
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c.Assert(outStr, checker.Equals, "hello")
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}
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// Regression test for #9155, #9044
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func (s *DockerSuite) TestExecEnv(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-e", "LALA=value1", "-e", "LALA=value2",
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"-d", "--name", "testing", "busybox", "top")
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c.Assert(waitRun("testing"), check.IsNil)
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out, _ := dockerCmd(c, "exec", "testing", "env")
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c.Assert(out, checker.Not(checker.Contains), "LALA=value1")
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c.Assert(out, checker.Contains, "LALA=value2")
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c.Assert(out, checker.Contains, "HOME=/root")
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}
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func (s *DockerSuite) TestExecExitStatus(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "top", "busybox", "top")
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// Test normal (non-detached) case first
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cmd := exec.Command(dockerBinary, "exec", "top", "sh", "-c", "exit 23")
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ec, _ := runCommand(cmd)
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c.Assert(ec, checker.Equals, 23)
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}
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func (s *DockerSuite) TestExecPausedContainer(c *check.C) {
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testRequires(c, DaemonIsLinux)
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defer unpauseAllContainers()
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out, _ := dockerCmd(c, "run", "-d", "--name", "testing", "busybox", "top")
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ContainerID := strings.TrimSpace(out)
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dockerCmd(c, "pause", "testing")
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out, _, err := dockerCmdWithError("exec", "-i", "-t", ContainerID, "echo", "hello")
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c.Assert(err, checker.NotNil, check.Commentf("container should fail to exec new conmmand if it is paused"))
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expected := ContainerID + " is paused, unpause the container before exec"
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c.Assert(out, checker.Contains, expected, check.Commentf("container should not exec new command if it is paused"))
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}
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// regression test for #9476
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func (s *DockerSuite) TestExecTtyCloseStdin(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "-it", "--name", "exec_tty_stdin", "busybox")
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cmd := exec.Command(dockerBinary, "exec", "-i", "exec_tty_stdin", "cat")
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stdinRw, err := cmd.StdinPipe()
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c.Assert(err, checker.IsNil)
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stdinRw.Write([]byte("test"))
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stdinRw.Close()
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out, _, err := runCommandWithOutput(cmd)
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c.Assert(err, checker.IsNil, check.Commentf(out))
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out, _ = dockerCmd(c, "top", "exec_tty_stdin")
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outArr := strings.Split(out, "\n")
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c.Assert(len(outArr), checker.LessOrEqualThan, 3, check.Commentf("exec process left running"))
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c.Assert(out, checker.Not(checker.Contains), "nsenter-exec")
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}
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func (s *DockerSuite) TestExecTtyWithoutStdin(c *check.C) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "-ti", "busybox")
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id := strings.TrimSpace(out)
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c.Assert(waitRun(id), checker.IsNil)
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errChan := make(chan error)
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go func() {
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defer close(errChan)
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cmd := exec.Command(dockerBinary, "exec", "-ti", id, "true")
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if _, err := cmd.StdinPipe(); err != nil {
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errChan <- err
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return
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}
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expected := "cannot enable tty mode"
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if out, _, err := runCommandWithOutput(cmd); err == nil {
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errChan <- fmt.Errorf("exec should have failed")
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return
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} else if !strings.Contains(out, expected) {
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errChan <- fmt.Errorf("exec failed with error %q: expected %q", out, expected)
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return
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}
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}()
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select {
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case err := <-errChan:
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c.Assert(err, check.IsNil)
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case <-time.After(3 * time.Second):
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c.Fatal("exec is running but should have failed")
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}
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}
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func (s *DockerSuite) TestExecParseError(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "top", "busybox", "top")
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// Test normal (non-detached) case first
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cmd := exec.Command(dockerBinary, "exec", "top")
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_, stderr, _, err := runCommandWithStdoutStderr(cmd)
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c.Assert(err, checker.NotNil)
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c.Assert(stderr, checker.Contains, "See '"+dockerBinary+" exec --help'")
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}
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func (s *DockerSuite) TestExecStopNotHanging(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "testing", "busybox", "top")
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err := exec.Command(dockerBinary, "exec", "testing", "top").Start()
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c.Assert(err, checker.IsNil)
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type dstop struct {
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out []byte
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err error
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}
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ch := make(chan dstop)
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go func() {
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out, err := exec.Command(dockerBinary, "stop", "testing").CombinedOutput()
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ch <- dstop{out, err}
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close(ch)
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}()
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select {
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case <-time.After(3 * time.Second):
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c.Fatal("Container stop timed out")
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case s := <-ch:
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c.Assert(s.err, check.IsNil)
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}
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}
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func (s *DockerSuite) TestExecCgroup(c *check.C) {
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testRequires(c, NotUserNamespace)
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "testing", "busybox", "top")
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out, _ := dockerCmd(c, "exec", "testing", "cat", "/proc/1/cgroup")
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containerCgroups := sort.StringSlice(strings.Split(out, "\n"))
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var wg sync.WaitGroup
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var mu sync.Mutex
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execCgroups := []sort.StringSlice{}
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errChan := make(chan error)
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// exec a few times concurrently to get consistent failure
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for i := 0; i < 5; i++ {
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wg.Add(1)
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go func() {
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out, _, err := dockerCmdWithError("exec", "testing", "cat", "/proc/self/cgroup")
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if err != nil {
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errChan <- err
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return
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}
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cg := sort.StringSlice(strings.Split(out, "\n"))
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mu.Lock()
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execCgroups = append(execCgroups, cg)
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mu.Unlock()
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wg.Done()
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}()
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}
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wg.Wait()
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close(errChan)
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for err := range errChan {
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c.Assert(err, checker.IsNil)
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}
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for _, cg := range execCgroups {
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if !reflect.DeepEqual(cg, containerCgroups) {
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fmt.Println("exec cgroups:")
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for _, name := range cg {
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fmt.Printf(" %s\n", name)
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}
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fmt.Println("container cgroups:")
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for _, name := range containerCgroups {
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fmt.Printf(" %s\n", name)
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}
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c.Fatal("cgroups mismatched")
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}
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}
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}
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func (s *DockerSuite) TestInspectExecID(c *check.C) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
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id := strings.TrimSuffix(out, "\n")
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out, err := inspectField(id, "ExecIDs")
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c.Assert(err, checker.IsNil, check.Commentf("failed to inspect container: %s", out))
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c.Assert(out, checker.Equals, "[]", check.Commentf("ExecIDs should be empty, got: %s", out))
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// Start an exec, have it block waiting so we can do some checking
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cmd := exec.Command(dockerBinary, "exec", id, "sh", "-c",
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"while ! test -e /tmp/execid1; do sleep 1; done")
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err = cmd.Start()
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c.Assert(err, checker.IsNil, check.Commentf("failed to start the exec cmd"))
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// Give the exec 10 chances/seconds to start then give up and stop the test
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tries := 10
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for i := 0; i < tries; i++ {
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// Since its still running we should see exec as part of the container
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out, err = inspectField(id, "ExecIDs")
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c.Assert(err, checker.IsNil, check.Commentf("failed to inspect container: %s", out))
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out = strings.TrimSuffix(out, "\n")
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if out != "[]" && out != "<no value>" {
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break
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}
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c.Assert(i+1, checker.Not(checker.Equals), tries, check.Commentf("ExecIDs should be empty, got: %s", out))
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time.Sleep(1 * time.Second)
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}
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// Save execID for later
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execID, err := inspectFilter(id, "index .ExecIDs 0")
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c.Assert(err, checker.IsNil, check.Commentf("failed to get the exec id"))
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// End the exec by creating the missing file
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err = exec.Command(dockerBinary, "exec", id,
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"sh", "-c", "touch /tmp/execid1").Run()
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c.Assert(err, checker.IsNil, check.Commentf("failed to run the 2nd exec cmd"))
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// Wait for 1st exec to complete
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cmd.Wait()
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// All execs for the container should be gone now
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out, err = inspectField(id, "ExecIDs")
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c.Assert(err, checker.IsNil, check.Commentf("failed to inspect container: %s", out))
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out = strings.TrimSuffix(out, "\n")
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c.Assert(out == "[]" || out == "<no value>", checker.True)
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// But we should still be able to query the execID
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sc, body, err := sockRequest("GET", "/exec/"+execID+"/json", nil)
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c.Assert(sc, checker.Equals, http.StatusOK, check.Commentf("received status != 200 OK: %d\n%s", sc, body))
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// Now delete the container and then an 'inspect' on the exec should
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// result in a 404 (not 'container not running')
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out, ec := dockerCmd(c, "rm", "-f", id)
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c.Assert(ec, checker.Equals, 0, check.Commentf("error removing container: %s", out))
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sc, body, err = sockRequest("GET", "/exec/"+execID+"/json", nil)
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c.Assert(sc, checker.Equals, http.StatusNotFound, check.Commentf("received status != 404: %d\n%s", sc, body))
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}
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func (s *DockerSuite) TestLinksPingLinkedContainersOnRename(c *check.C) {
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testRequires(c, DaemonIsLinux)
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var out string
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out, _ = dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
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idA := strings.TrimSpace(out)
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c.Assert(idA, checker.Not(checker.Equals), "", check.Commentf("%s, id should not be nil", out))
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out, _ = dockerCmd(c, "run", "-d", "--link", "container1:alias1", "--name", "container2", "busybox", "top")
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idB := strings.TrimSpace(out)
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c.Assert(idB, checker.Not(checker.Equals), "", check.Commentf("%s, id should not be nil", out))
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dockerCmd(c, "exec", "container2", "ping", "-c", "1", "alias1", "-W", "1")
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dockerCmd(c, "rename", "container1", "container_new")
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dockerCmd(c, "exec", "container2", "ping", "-c", "1", "alias1", "-W", "1")
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}
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func (s *DockerSuite) TestRunExecDir(c *check.C) {
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testRequires(c, SameHostDaemon, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "busybox", "top")
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id := strings.TrimSpace(out)
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execDir := filepath.Join(execDriverPath, id)
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stateFile := filepath.Join(execDir, "state.json")
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{
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fi, err := os.Stat(execDir)
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c.Assert(err, checker.IsNil)
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if !fi.IsDir() {
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c.Fatalf("%q must be a directory", execDir)
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}
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fi, err = os.Stat(stateFile)
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c.Assert(err, checker.IsNil)
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}
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dockerCmd(c, "stop", id)
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{
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_, err := os.Stat(execDir)
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c.Assert(err, checker.NotNil)
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c.Assert(err, checker.NotNil, check.Commentf("Exec directory %q exists for removed container!", execDir))
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if !os.IsNotExist(err) {
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c.Fatalf("Error should be about non-existing, got %s", err)
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}
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}
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dockerCmd(c, "start", id)
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{
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fi, err := os.Stat(execDir)
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c.Assert(err, checker.IsNil)
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if !fi.IsDir() {
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c.Fatalf("%q must be a directory", execDir)
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}
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fi, err = os.Stat(stateFile)
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c.Assert(err, checker.IsNil)
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}
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dockerCmd(c, "rm", "-f", id)
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{
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_, err := os.Stat(execDir)
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c.Assert(err, checker.NotNil, check.Commentf("Exec directory %q exists for removed container!", execDir))
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if !os.IsNotExist(err) {
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c.Fatalf("Error should be about non-existing, got %s", err)
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}
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}
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}
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func (s *DockerSuite) TestRunMutableNetworkFiles(c *check.C) {
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testRequires(c, SameHostDaemon, DaemonIsLinux)
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for _, fn := range []string{"resolv.conf", "hosts"} {
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deleteAllContainers()
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content, err := runCommandAndReadContainerFile(fn, exec.Command(dockerBinary, "run", "-d", "--name", "c1", "busybox", "sh", "-c", fmt.Sprintf("echo success >/etc/%s && top", fn)))
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c.Assert(err, checker.IsNil)
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c.Assert(strings.TrimSpace(string(content)), checker.Equals, "success", check.Commentf("Content was not what was modified in the container", string(content)))
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out, _ := dockerCmd(c, "run", "-d", "--name", "c2", "busybox", "top")
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contID := strings.TrimSpace(out)
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netFilePath := containerStorageFile(contID, fn)
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f, err := os.OpenFile(netFilePath, os.O_WRONLY|os.O_SYNC|os.O_APPEND, 0644)
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c.Assert(err, checker.IsNil)
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if _, err := f.Seek(0, 0); err != nil {
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f.Close()
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c.Fatal(err)
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}
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if err := f.Truncate(0); err != nil {
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f.Close()
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c.Fatal(err)
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}
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if _, err := f.Write([]byte("success2\n")); err != nil {
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f.Close()
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c.Fatal(err)
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}
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f.Close()
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res, _ := dockerCmd(c, "exec", contID, "cat", "/etc/"+fn)
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c.Assert(res, checker.Equals, "success2\n")
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}
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}
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func (s *DockerSuite) TestExecWithUser(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name", "parent", "busybox", "top")
|
|
|
|
out, _ := dockerCmd(c, "exec", "-u", "1", "parent", "id")
|
|
c.Assert(out, checker.Contains, "uid=1(daemon) gid=1(daemon)")
|
|
|
|
out, _ = dockerCmd(c, "exec", "-u", "root", "parent", "id")
|
|
c.Assert(out, checker.Contains, "uid=0(root) gid=0(root)", check.Commentf("exec with user by id expected daemon user got %s", out))
|
|
}
|
|
|
|
func (s *DockerSuite) TestExecWithPrivileged(c *check.C) {
|
|
testRequires(c, DaemonIsLinux, NotUserNamespace)
|
|
// Start main loop which attempts mknod repeatedly
|
|
dockerCmd(c, "run", "-d", "--name", "parent", "--cap-drop=ALL", "busybox", "sh", "-c", `while (true); do if [ -e /exec_priv ]; then cat /exec_priv && mknod /tmp/sda b 8 0 && echo "Success"; else echo "Privileged exec has not run yet"; fi; usleep 10000; done`)
|
|
|
|
// Check exec mknod doesn't work
|
|
cmd := exec.Command(dockerBinary, "exec", "parent", "sh", "-c", "mknod /tmp/sdb b 8 16")
|
|
out, _, err := runCommandWithOutput(cmd)
|
|
c.Assert(err, checker.NotNil, check.Commentf("exec mknod in --cap-drop=ALL container without --privileged should fail"))
|
|
c.Assert(out, checker.Contains, "Operation not permitted", check.Commentf("exec mknod in --cap-drop=ALL container without --privileged should fail"))
|
|
|
|
// Check exec mknod does work with --privileged
|
|
cmd = exec.Command(dockerBinary, "exec", "--privileged", "parent", "sh", "-c", `echo "Running exec --privileged" > /exec_priv && mknod /tmp/sdb b 8 16 && usleep 50000 && echo "Finished exec --privileged" > /exec_priv && echo ok`)
|
|
out, _, err = runCommandWithOutput(cmd)
|
|
c.Assert(err, checker.IsNil)
|
|
|
|
actual := strings.TrimSpace(out)
|
|
c.Assert(actual, checker.Equals, "ok", check.Commentf("exec mknod in --cap-drop=ALL container with --privileged failed, output: %q", out))
|
|
|
|
// Check subsequent unprivileged exec cannot mknod
|
|
cmd = exec.Command(dockerBinary, "exec", "parent", "sh", "-c", "mknod /tmp/sdc b 8 32")
|
|
out, _, err = runCommandWithOutput(cmd)
|
|
c.Assert(err, checker.NotNil, check.Commentf("repeating exec mknod in --cap-drop=ALL container after --privileged without --privileged should fail"))
|
|
c.Assert(out, checker.Contains, "Operation not permitted", check.Commentf("repeating exec mknod in --cap-drop=ALL container after --privileged without --privileged should fail"))
|
|
|
|
// Confirm at no point was mknod allowed
|
|
logCmd := exec.Command(dockerBinary, "logs", "parent")
|
|
out, _, err = runCommandWithOutput(logCmd)
|
|
c.Assert(err, checker.IsNil)
|
|
c.Assert(out, checker.Not(checker.Contains), "Success")
|
|
|
|
}
|
|
|
|
func (s *DockerSuite) TestExecWithImageUser(c *check.C) {
|
|
testRequires(c, DaemonIsLinux)
|
|
name := "testbuilduser"
|
|
_, err := buildImage(name,
|
|
`FROM busybox
|
|
RUN echo 'dockerio:x:1001:1001::/bin:/bin/false' >> /etc/passwd
|
|
USER dockerio`,
|
|
true)
|
|
c.Assert(err, checker.IsNil)
|
|
|
|
dockerCmd(c, "run", "-d", "--name", "dockerioexec", name, "top")
|
|
|
|
out, _ := dockerCmd(c, "exec", "dockerioexec", "whoami")
|
|
c.Assert(out, checker.Contains, "dockerio", check.Commentf("exec with user by id expected dockerio user got %s", out))
|
|
}
|
|
|
|
func (s *DockerSuite) TestExecOnReadonlyContainer(c *check.C) {
|
|
// --read-only + userns has remount issues
|
|
testRequires(c, DaemonIsLinux, NotUserNamespace)
|
|
dockerCmd(c, "run", "-d", "--read-only", "--name", "parent", "busybox", "top")
|
|
dockerCmd(c, "exec", "parent", "true")
|
|
}
|
|
|
|
// #15750
|
|
func (s *DockerSuite) TestExecStartFails(c *check.C) {
|
|
testRequires(c, DaemonIsLinux)
|
|
name := "exec-15750"
|
|
dockerCmd(c, "run", "-d", "--name", name, "busybox", "top")
|
|
c.Assert(waitRun(name), checker.IsNil)
|
|
|
|
out, _, err := dockerCmdWithError("exec", name, "no-such-cmd")
|
|
c.Assert(err, checker.NotNil, check.Commentf(out))
|
|
c.Assert(out, checker.Contains, "executable file not found")
|
|
}
|