| package main |
| |
| import ( |
| "context" |
| "encoding/json" |
| "fmt" |
| "regexp" |
| "sort" |
| "strings" |
| "testing" |
| |
| "github.com/docker/docker/integration-cli/cli" |
| "github.com/docker/docker/runconfig" |
| "gotest.tools/v3/assert" |
| is "gotest.tools/v3/assert/cmp" |
| ) |
| |
| type DockerCLILinksSuite struct { |
| ds *DockerSuite |
| } |
| |
| func (s *DockerCLILinksSuite) TearDownTest(ctx context.Context, c *testing.T) { |
| s.ds.TearDownTest(ctx, c) |
| } |
| |
| func (s *DockerCLILinksSuite) OnTimeout(c *testing.T) { |
| s.ds.OnTimeout(c) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksPingUnlinkedContainers(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| _, exitCode, err := dockerCmdWithError("run", "--rm", "busybox", "sh", "-c", "ping -c 1 alias1 -W 1 && ping -c 1 alias2 -W 1") |
| |
| // run ping failed with error |
| assert.Equal(c, exitCode, 1, fmt.Sprintf("error: %v", err)) |
| } |
| |
| // Test for appropriate error when calling --link with an invalid target container |
| func (s *DockerCLILinksSuite) TestLinksInvalidContainerTarget(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| out, _, err := dockerCmdWithError("run", "--link", "bogus:alias", "busybox", "true") |
| |
| // an invalid container target should produce an error |
| assert.Check(c, is.ErrorContains(err, "could not get container for bogus")) |
| assert.Check(c, is.Contains(out, "could not get container")) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksPingLinkedContainers(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| // Test with the three different ways of specifying the default network on Linux |
| testLinkPingOnNetwork(c, "") |
| testLinkPingOnNetwork(c, "default") |
| testLinkPingOnNetwork(c, "bridge") |
| } |
| |
| func testLinkPingOnNetwork(c *testing.T, network string) { |
| var postArgs []string |
| if network != "" { |
| postArgs = append(postArgs, []string{"--net", network}...) |
| } |
| postArgs = append(postArgs, []string{"busybox", "top"}...) |
| runArgs1 := append([]string{"run", "-d", "--name", "container1", "--hostname", "fred"}, postArgs...) |
| runArgs2 := append([]string{"run", "-d", "--name", "container2", "--hostname", "wilma"}, postArgs...) |
| |
| // Run the two named containers |
| cli.DockerCmd(c, runArgs1...) |
| cli.DockerCmd(c, runArgs2...) |
| |
| postArgs = []string{} |
| if network != "" { |
| postArgs = append(postArgs, []string{"--net", network}...) |
| } |
| postArgs = append(postArgs, []string{"busybox", "sh", "-c"}...) |
| |
| // Format a run for a container which links to the other two |
| runArgs := append([]string{"run", "--rm", "--link", "container1:alias1", "--link", "container2:alias2"}, postArgs...) |
| pingCmd := "ping -c 1 %s -W 1 && ping -c 1 %s -W 1" |
| |
| // test ping by alias, ping by name, and ping by hostname |
| // 1. Ping by alias |
| cli.DockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "alias1", "alias2"))...) |
| // 2. Ping by container name |
| cli.DockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "container1", "container2"))...) |
| // 3. Ping by hostname |
| cli.DockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "fred", "wilma"))...) |
| |
| // Clean for next round |
| cli.DockerCmd(c, "rm", "-f", "container1") |
| cli.DockerCmd(c, "rm", "-f", "container2") |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksPingLinkedContainersAfterRename(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| idA := cli.DockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top").Stdout() |
| idB := cli.DockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top").Stdout() |
| cli.DockerCmd(c, "rename", "container1", "container_new") |
| cli.DockerCmd(c, "run", "--rm", "--link", "container_new:alias1", "--link", "container2:alias2", "busybox", "sh", "-c", "ping -c 1 alias1 -W 1 && ping -c 1 alias2 -W 1") |
| cli.DockerCmd(c, "kill", strings.TrimSpace(idA)) |
| cli.DockerCmd(c, "kill", strings.TrimSpace(idB)) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksInspectLinksStarted(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| cli.DockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top") |
| cli.DockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top") |
| cli.DockerCmd(c, "run", "-d", "--name", "testinspectlink", "--link", "container1:alias1", "--link", "container2:alias2", "busybox", "top") |
| links := inspectFieldJSON(c, "testinspectlink", "HostConfig.Links") |
| |
| var result []string |
| err := json.Unmarshal([]byte(links), &result) |
| assert.NilError(c, err) |
| |
| expected := []string{ |
| "/container1:/testinspectlink/alias1", |
| "/container2:/testinspectlink/alias2", |
| } |
| sort.Strings(result) |
| assert.DeepEqual(c, result, expected) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksInspectLinksStopped(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| |
| cli.DockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top") |
| cli.DockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top") |
| cli.DockerCmd(c, "run", "-d", "--name", "testinspectlink", "--link", "container1:alias1", "--link", "container2:alias2", "busybox", "true") |
| links := inspectFieldJSON(c, "testinspectlink", "HostConfig.Links") |
| |
| var result []string |
| err := json.Unmarshal([]byte(links), &result) |
| assert.NilError(c, err) |
| |
| expected := []string{ |
| "/container1:/testinspectlink/alias1", |
| "/container2:/testinspectlink/alias2", |
| } |
| sort.Strings(result) |
| assert.DeepEqual(c, result, expected) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksNotStartedParentNotFail(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| cli.DockerCmd(c, "create", "--name=first", "busybox", "top") |
| cli.DockerCmd(c, "create", "--name=second", "--link=first:first", "busybox", "top") |
| cli.DockerCmd(c, "start", "first") |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksHostsFilesInject(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| testRequires(c, testEnv.IsLocalDaemon) |
| |
| idOne := cli.DockerCmd(c, "run", "-itd", "--name", "one", "busybox", "top").Stdout() |
| idOne = strings.TrimSpace(idOne) |
| idTwo := cli.DockerCmd(c, "run", "-itd", "--name", "two", "--link", "one:onetwo", "busybox", "top").Stdout() |
| idTwo = strings.TrimSpace(idTwo) |
| cli.WaitRun(c, idTwo) |
| |
| readContainerFileWithExec(c, idOne, "/etc/hosts") |
| contentTwo := readContainerFileWithExec(c, idTwo, "/etc/hosts") |
| // Host is not present in updated hosts file |
| assert.Assert(c, is.Contains(string(contentTwo), "onetwo")) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksUpdateOnRestart(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| testRequires(c, testEnv.IsLocalDaemon) |
| cli.DockerCmd(c, "run", "-d", "--name", "one", "busybox", "top") |
| id := cli.DockerCmd(c, "run", "-d", "--name", "two", "--link", "one:onetwo", "--link", "one:one", "busybox", "top").Stdout() |
| id = strings.TrimSpace(id) |
| |
| realIP := inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress") |
| content := readContainerFileWithExec(c, id, "/etc/hosts") |
| |
| getIP := func(hosts []byte, hostname string) string { |
| re := regexp.MustCompile(fmt.Sprintf(`(\S*)\t%s`, regexp.QuoteMeta(hostname))) |
| matches := re.FindSubmatch(hosts) |
| assert.Assert(c, matches != nil, "Hostname %s have no matches in hosts", hostname) |
| return string(matches[1]) |
| } |
| ip := getIP(content, "one") |
| assert.Check(c, is.Equal(ip, realIP)) |
| |
| ip = getIP(content, "onetwo") |
| assert.Check(c, is.Equal(ip, realIP)) |
| |
| cli.DockerCmd(c, "restart", "one") |
| realIP = inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress") |
| |
| content = readContainerFileWithExec(c, id, "/etc/hosts") |
| ip = getIP(content, "one") |
| assert.Check(c, is.Equal(ip, realIP)) |
| |
| ip = getIP(content, "onetwo") |
| assert.Check(c, is.Equal(ip, realIP)) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksEnvs(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| cli.DockerCmd(c, "run", "-d", "-e", "e1=", "-e", "e2=v2", "-e", "e3=v3=v3", "--name=first", "busybox", "top") |
| out := cli.DockerCmd(c, "run", "--name=second", "--link=first:first", "busybox", "env").Stdout() |
| assert.Assert(c, is.Contains(out, "FIRST_ENV_e1=\n")) |
| assert.Assert(c, is.Contains(out, "FIRST_ENV_e2=v2")) |
| assert.Assert(c, is.Contains(out, "FIRST_ENV_e3=v3=v3")) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinkShortDefinition(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| cid := cli.DockerCmd(c, "run", "-d", "--name", "shortlinkdef", "busybox", "top").Stdout() |
| cid = strings.TrimSpace(cid) |
| cli.WaitRun(c, cid) |
| |
| cid2 := cli.DockerCmd(c, "run", "-d", "--name", "link2", "--link", "shortlinkdef", "busybox", "top").Stdout() |
| cid2 = strings.TrimSpace(cid2) |
| cli.WaitRun(c, cid2) |
| |
| links := inspectFieldJSON(c, cid2, "HostConfig.Links") |
| assert.Equal(c, links, `["/shortlinkdef:/link2/shortlinkdef"]`) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksNetworkHostContainer(c *testing.T) { |
| testRequires(c, DaemonIsLinux, NotUserNamespace) |
| cli.DockerCmd(c, "run", "-d", "--net", "host", "--name", "host_container", "busybox", "top") |
| out, _, err := dockerCmdWithError("run", "--name", "should_fail", "--link", "host_container:tester", "busybox", "true") |
| |
| // Running container linking to a container with --net host should have failed |
| assert.Check(c, err != nil, "out: %s", out) |
| // Running container linking to a container with --net host should have failed |
| assert.Check(c, is.Contains(out, runconfig.ErrConflictHostNetworkAndLinks.Error())) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksEtcHostsRegularFile(c *testing.T) { |
| testRequires(c, DaemonIsLinux, NotUserNamespace) |
| out := cli.DockerCmd(c, "run", "--net=host", "busybox", "ls", "-la", "/etc/hosts").Stdout() |
| // /etc/hosts should be a regular file |
| assert.Assert(c, is.Regexp("^-.+\n$", out)) |
| } |
| |
| func (s *DockerCLILinksSuite) TestLinksMultipleWithSameName(c *testing.T) { |
| testRequires(c, DaemonIsLinux) |
| cli.DockerCmd(c, "run", "-d", "--name=upstream-a", "busybox", "top") |
| cli.DockerCmd(c, "run", "-d", "--name=upstream-b", "busybox", "top") |
| cli.DockerCmd(c, "run", "--link", "upstream-a:upstream", "--link", "upstream-b:upstream", "busybox", "sh", "-c", "ping -c 1 upstream") |
| } |
