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