241 lines
9.4 KiB
Go
241 lines
9.4 KiB
Go
package main
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import (
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"encoding/json"
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"fmt"
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"regexp"
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"strings"
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"github.com/docker/docker/integration-cli/checker"
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"github.com/docker/docker/pkg/testutil"
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"github.com/docker/docker/runconfig"
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"github.com/go-check/check"
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)
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func (s *DockerSuite) TestLinksPingUnlinkedContainers(c *check.C) {
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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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c.Assert(exitCode, checker.Equals, 1, check.Commentf("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 *DockerSuite) TestLinksInvalidContainerTarget(c *check.C) {
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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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c.Assert(err, checker.NotNil, check.Commentf("out: %s", out))
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// an invalid container target should produce an error
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c.Assert(out, checker.Contains, "Could not get container")
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}
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func (s *DockerSuite) TestLinksPingLinkedContainers(c *check.C) {
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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 *check.C, 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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dockerCmd(c, runArgs1...)
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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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dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "alias1", "alias2"))...)
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// 2. Ping by container name
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dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "container1", "container2"))...)
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// 3. Ping by hostname
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dockerCmd(c, append(runArgs, fmt.Sprintf(pingCmd, "fred", "wilma"))...)
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// Clean for next round
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dockerCmd(c, "rm", "-f", "container1")
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dockerCmd(c, "rm", "-f", "container2")
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}
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func (s *DockerSuite) TestLinksPingLinkedContainersAfterRename(c *check.C) {
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testRequires(c, DaemonIsLinux)
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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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out, _ = dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
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idB := strings.TrimSpace(out)
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dockerCmd(c, "rename", "container1", "container_new")
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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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dockerCmd(c, "kill", idA)
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dockerCmd(c, "kill", idB)
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}
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func (s *DockerSuite) TestLinksInspectLinksStarted(c *check.C) {
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testRequires(c, DaemonIsLinux)
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var (
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expected = map[string]struct{}{"/container1:/testinspectlink/alias1": {}, "/container2:/testinspectlink/alias2": {}}
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result []string
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)
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dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
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dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
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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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err := json.Unmarshal([]byte(links), &result)
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c.Assert(err, checker.IsNil)
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output := testutil.ConvertSliceOfStringsToMap(result)
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c.Assert(output, checker.DeepEquals, expected)
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}
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func (s *DockerSuite) TestLinksInspectLinksStopped(c *check.C) {
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testRequires(c, DaemonIsLinux)
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var (
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expected = map[string]struct{}{"/container1:/testinspectlink/alias1": {}, "/container2:/testinspectlink/alias2": {}}
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result []string
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)
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dockerCmd(c, "run", "-d", "--name", "container1", "busybox", "top")
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dockerCmd(c, "run", "-d", "--name", "container2", "busybox", "top")
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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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err := json.Unmarshal([]byte(links), &result)
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c.Assert(err, checker.IsNil)
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output := testutil.ConvertSliceOfStringsToMap(result)
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c.Assert(output, checker.DeepEquals, expected)
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}
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func (s *DockerSuite) TestLinksNotStartedParentNotFail(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "create", "--name=first", "busybox", "top")
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dockerCmd(c, "create", "--name=second", "--link=first:first", "busybox", "top")
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dockerCmd(c, "start", "first")
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}
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func (s *DockerSuite) TestLinksHostsFilesInject(c *check.C) {
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testRequires(c, DaemonIsLinux)
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testRequires(c, SameHostDaemon, ExecSupport)
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out, _ := dockerCmd(c, "run", "-itd", "--name", "one", "busybox", "top")
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idOne := strings.TrimSpace(out)
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out, _ = dockerCmd(c, "run", "-itd", "--name", "two", "--link", "one:onetwo", "busybox", "top")
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idTwo := strings.TrimSpace(out)
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c.Assert(waitRun(idTwo), checker.IsNil)
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contentOne, err := readContainerFileWithExec(idOne, "/etc/hosts")
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c.Assert(err, checker.IsNil, check.Commentf("contentOne: %s", string(contentOne)))
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contentTwo, err := readContainerFileWithExec(idTwo, "/etc/hosts")
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c.Assert(err, checker.IsNil, check.Commentf("contentTwo: %s", string(contentTwo)))
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// Host is not present in updated hosts file
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c.Assert(string(contentTwo), checker.Contains, "onetwo")
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}
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func (s *DockerSuite) TestLinksUpdateOnRestart(c *check.C) {
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testRequires(c, DaemonIsLinux)
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testRequires(c, SameHostDaemon, ExecSupport)
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dockerCmd(c, "run", "-d", "--name", "one", "busybox", "top")
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out, _ := dockerCmd(c, "run", "-d", "--name", "two", "--link", "one:onetwo", "--link", "one:one", "busybox", "top")
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id := strings.TrimSpace(string(out))
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realIP := inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress")
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content, err := readContainerFileWithExec(id, "/etc/hosts")
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c.Assert(err, checker.IsNil)
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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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c.Assert(matches, checker.NotNil, check.Commentf("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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c.Assert(ip, checker.Equals, realIP)
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ip = getIP(content, "onetwo")
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c.Assert(ip, checker.Equals, realIP)
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dockerCmd(c, "restart", "one")
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realIP = inspectField(c, "one", "NetworkSettings.Networks.bridge.IPAddress")
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content, err = readContainerFileWithExec(id, "/etc/hosts")
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c.Assert(err, checker.IsNil, check.Commentf("content: %s", string(content)))
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ip = getIP(content, "one")
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c.Assert(ip, checker.Equals, realIP)
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ip = getIP(content, "onetwo")
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c.Assert(ip, checker.Equals, realIP)
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}
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func (s *DockerSuite) TestLinksEnvs(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "-e", "e1=", "-e", "e2=v2", "-e", "e3=v3=v3", "--name=first", "busybox", "top")
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out, _ := dockerCmd(c, "run", "--name=second", "--link=first:first", "busybox", "env")
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c.Assert(out, checker.Contains, "FIRST_ENV_e1=\n")
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c.Assert(out, checker.Contains, "FIRST_ENV_e2=v2")
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c.Assert(out, checker.Contains, "FIRST_ENV_e3=v3=v3")
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}
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func (s *DockerSuite) TestLinkShortDefinition(c *check.C) {
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testRequires(c, DaemonIsLinux)
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out, _ := dockerCmd(c, "run", "-d", "--name", "shortlinkdef", "busybox", "top")
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cid := strings.TrimSpace(out)
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c.Assert(waitRun(cid), checker.IsNil)
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out, _ = dockerCmd(c, "run", "-d", "--name", "link2", "--link", "shortlinkdef", "busybox", "top")
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cid2 := strings.TrimSpace(out)
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c.Assert(waitRun(cid2), checker.IsNil)
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links := inspectFieldJSON(c, cid2, "HostConfig.Links")
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c.Assert(links, checker.Equals, "[\"/shortlinkdef:/link2/shortlinkdef\"]")
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}
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func (s *DockerSuite) TestLinksNetworkHostContainer(c *check.C) {
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testRequires(c, DaemonIsLinux, NotUserNamespace)
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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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c.Assert(err, checker.NotNil, check.Commentf("out: %s", out))
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// Running container linking to a container with --net host should have failed
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c.Assert(out, checker.Contains, runconfig.ErrConflictHostNetworkAndLinks.Error())
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}
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func (s *DockerSuite) TestLinksEtcHostsRegularFile(c *check.C) {
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testRequires(c, DaemonIsLinux, NotUserNamespace)
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out, _ := dockerCmd(c, "run", "--net=host", "busybox", "ls", "-la", "/etc/hosts")
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// /etc/hosts should be a regular file
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c.Assert(out, checker.Matches, "^-.+\n")
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}
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func (s *DockerSuite) TestLinksMultipleWithSameName(c *check.C) {
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testRequires(c, DaemonIsLinux)
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dockerCmd(c, "run", "-d", "--name=upstream-a", "busybox", "top")
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dockerCmd(c, "run", "-d", "--name=upstream-b", "busybox", "top")
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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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