docker/integration-cli/docker_cli_experimental_test.go at master · Eagle-X/docker · GitHub

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// +build experimental

package main

import (

"fmt"

"io/ioutil"

"os"

"os/exec"

"path/filepath"

"strconv"

"strings"

"github.com/docker/docker/pkg/system"

"github.com/go-check/check"

)

func (s *DockerSuite) TestExperimentalVersion(c *check.C) {

out, _ := dockerCmd(c, "version")

for _, line := range strings.Split(out, "\n") {

if strings.HasPrefix(line, "Experimental (client):") || strings.HasPrefix(line, "Experimental (server):") {

c.Assert(line, check.Matches, "*true")

}

out, _ = dockerCmd(c, "-v")

if !strings.Contains(out, ", experimental") {

c.Fatalf("docker version did not contain experimental: %s", out)

}

// user namespaces test: run daemon with remapped root setting

// 1. validate uid/gid maps are set properly

// 2. verify that files created are owned by remapped root

func (s *DockerDaemonSuite) TestDaemonUserNamespaceRootSetting(c *check.C) {

testRequires(c, NativeExecDriver)

testRequires(c, SameHostDaemon)

c.Assert(s.d.StartWithBusybox("--userns-remap", "default"), check.IsNil)

tmpDir, err := ioutil.TempDir("", "userns")

if err != nil {

c.Fatal(err)

}

defer os.RemoveAll(tmpDir)

// we need to find the uid and gid of the remapped root from the daemon's root dir info

uidgid := strings.Split(filepath.Base(s.d.root), ".")

c.Assert(len(uidgid), check.Equals, 2, check.Commentf("Should have gotten uid/gid strings from root dirname: %s", filepath.Base(s.d.root)))

uid, err := strconv.Atoi(uidgid[0])

c.Assert(err, check.IsNil, check.Commentf("Can't parse uid: %v", err))

gid, err := strconv.Atoi(uidgid[1])

c.Assert(err, check.IsNil, check.Commentf("Can't parse gid: %v", err))

//writeable by the remapped root UID/GID pair

c.Assert(os.Chown(tmpDir, uid, gid), check.IsNil)

out, err := s.d.Cmd("run", "-d", "--name", "userns", "-v", tmpDir+":/goofy", "busybox", "sh", "-c", "touch /goofy/testfile; top")

c.Assert(err, check.IsNil, check.Commentf("Output: %s", out))

pid, err := s.d.Cmd("inspect", "--format='{{.State.Pid}}'", "userns")

if err != nil {

c.Fatalf("Could not inspect running container: out: %q; err: %v", pid, err)

}

// check the uid and gid maps for the PID to ensure root is remapped

// (cmd = cat /proc/<pid>/uid_map | grep -E '0\s+9999\s+1')

out, rc1, err := runCommandPipelineWithOutput(

exec.Command("cat", "/proc/"+strings.TrimSpace(pid)+"/uid_map"),

exec.Command("grep", "-E", fmt.Sprintf("0[[:space:]]+%d[[:space:]]+", uid)))

c.Assert(rc1, check.Equals, 0, check.Commentf("Didn't match uid_map: output: %s", out))

out, rc2, err := runCommandPipelineWithOutput(

exec.Command("cat", "/proc/"+strings.TrimSpace(pid)+"/gid_map"),

exec.Command("grep", "-E", fmt.Sprintf("0[[:space:]]+%d[[:space:]]+", gid)))

c.Assert(rc2, check.Equals, 0, check.Commentf("Didn't match gid_map: output: %s", out))

// check that the touched file is owned by remapped uid:gid

stat, err := system.Stat(filepath.Join(tmpDir, "testfile"))

if err != nil {

c.Fatal(err)

}

c.Assert(stat.UID(), check.Equals, uint32(uid), check.Commentf("Touched file not owned by remapped root UID"))

c.Assert(stat.GID(), check.Equals, uint32(gid), check.Commentf("Touched file not owned by remapped root GID"))

}

docker/integration-cli/docker_cli_experimental_test.go at master · Eagle-X/docker · GitHub

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