package main import ( "bufio" "os/exec" "regexp" "strings" "time" "github.com/docker/docker/integration-cli/checker" "github.com/go-check/check" ) func (s *DockerSuite) TestStatsNoStream(c *check.C) { // Windows does not support stats testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "busybox", "top") id := strings.TrimSpace(out) c.Assert(waitRun(id), checker.IsNil) statsCmd := exec.Command(dockerBinary, "stats", "--no-stream", id) type output struct { out []byte err error } ch := make(chan output) go func() { out, err := statsCmd.Output() ch <- output{out, err} }() select { case outerr := <-ch: c.Assert(outerr.err, checker.IsNil, check.Commentf("Error running stats: %v", outerr.err)) c.Assert(string(outerr.out), checker.Contains, id) //running container wasn't present in output case <-time.After(3 * time.Second): statsCmd.Process.Kill() c.Fatalf("stats did not return immediately when not streaming") } } func (s *DockerSuite) TestStatsContainerNotFound(c *check.C) { // Windows does not support stats testRequires(c, DaemonIsLinux) out, _, err := dockerCmdWithError("stats", "notfound") c.Assert(err, checker.NotNil) c.Assert(out, checker.Contains, "No such container: notfound", check.Commentf("Expected to fail on not found container stats, got %q instead", out)) out, _, err = dockerCmdWithError("stats", "--no-stream", "notfound") c.Assert(err, checker.NotNil) c.Assert(out, checker.Contains, "No such container: notfound", check.Commentf("Expected to fail on not found container stats with --no-stream, got %q instead", out)) } func (s *DockerSuite) TestStatsAllRunningNoStream(c *check.C) { // Windows does not support stats testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "busybox", "top") id1 := strings.TrimSpace(out)[:12] c.Assert(waitRun(id1), check.IsNil) out, _ = dockerCmd(c, "run", "-d", "busybox", "top") id2 := strings.TrimSpace(out)[:12] c.Assert(waitRun(id2), check.IsNil) out, _ = dockerCmd(c, "run", "-d", "busybox", "top") id3 := strings.TrimSpace(out)[:12] c.Assert(waitRun(id3), check.IsNil) dockerCmd(c, "stop", id3) out, _ = dockerCmd(c, "stats", "--no-stream") if !strings.Contains(out, id1) || !strings.Contains(out, id2) { c.Fatalf("Expected stats output to contain both %s and %s, got %s", id1, id2, out) } if strings.Contains(out, id3) { c.Fatalf("Did not expect %s in stats, got %s", id3, out) } // check output contains real data, but not all zeros reg, _ := regexp.Compile("[1-9]+") // split output with "\n", outLines[1] is id2's output // outLines[2] is id1's output outLines := strings.Split(out, "\n") // check stat result of id2 contains real data realData := reg.Find([]byte(outLines[1][12:])) c.Assert(realData, checker.NotNil, check.Commentf("stat result are empty: %s", out)) // check stat result of id1 contains real data realData = reg.Find([]byte(outLines[2][12:])) c.Assert(realData, checker.NotNil, check.Commentf("stat result are empty: %s", out)) } func (s *DockerSuite) TestStatsAllNoStream(c *check.C) { // Windows does not support stats testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "busybox", "top") id1 := strings.TrimSpace(out)[:12] c.Assert(waitRun(id1), check.IsNil) dockerCmd(c, "stop", id1) out, _ = dockerCmd(c, "run", "-d", "busybox", "top") id2 := strings.TrimSpace(out)[:12] c.Assert(waitRun(id2), check.IsNil) out, _ = dockerCmd(c, "stats", "--all", "--no-stream") if !strings.Contains(out, id1) || !strings.Contains(out, id2) { c.Fatalf("Expected stats output to contain both %s and %s, got %s", id1, id2, out) } // check output contains real data, but not all zeros reg, _ := regexp.Compile("[1-9]+") // split output with "\n", outLines[1] is id2's output outLines := strings.Split(out, "\n") // check stat result of id2 contains real data realData := reg.Find([]byte(outLines[1][12:])) c.Assert(realData, checker.NotNil, check.Commentf("stat result of %s is empty: %s", id2, out)) // check stat result of id1 contains all zero realData = reg.Find([]byte(outLines[2][12:])) c.Assert(realData, checker.IsNil, check.Commentf("stat result of %s should be empty : %s", id1, out)) } func (s *DockerSuite) TestStatsAllNewContainersAdded(c *check.C) { // Windows does not support stats testRequires(c, DaemonIsLinux) id := make(chan string) addedChan := make(chan struct{}) runSleepingContainer(c, "-d") statsCmd := exec.Command(dockerBinary, "stats") stdout, err := statsCmd.StdoutPipe() c.Assert(err, check.IsNil) c.Assert(statsCmd.Start(), check.IsNil) defer statsCmd.Process.Kill() go func() { containerID := <-id matchID := regexp.MustCompile(containerID) scanner := bufio.NewScanner(stdout) for scanner.Scan() { switch { case matchID.MatchString(scanner.Text()): close(addedChan) return } } }() out, _ := runSleepingContainer(c, "-d") c.Assert(waitRun(strings.TrimSpace(out)), check.IsNil) id <- strings.TrimSpace(out)[:12] select { case <-time.After(30 * time.Second): c.Fatal("failed to observe new container created added to stats") case <-addedChan: // ignore, done } }