package main import ( "encoding/json" "fmt" "net/http" "os/exec" "runtime" "strconv" "strings" "time" "github.com/docker/docker/api/types" "github.com/docker/docker/pkg/integration/checker" "github.com/docker/docker/pkg/version" "github.com/go-check/check" ) var expectedNetworkInterfaceStats = strings.Split("rx_bytes rx_dropped rx_errors rx_packets tx_bytes tx_dropped tx_errors tx_packets", " ") func (s *DockerSuite) TestApiStatsNoStreamGetCpu(c *check.C) { testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "while true;do echo 'Hello'; usleep 100000; done") id := strings.TrimSpace(out) c.Assert(waitRun(id), checker.IsNil) resp, body, err := sockRequestRaw("GET", fmt.Sprintf("/containers/%s/stats?stream=false", id), nil, "") c.Assert(err, checker.IsNil) c.Assert(resp.ContentLength, checker.GreaterThan, int64(0), check.Commentf("should not use chunked encoding")) c.Assert(resp.Header.Get("Content-Type"), checker.Equals, "application/json") var v *types.Stats err = json.NewDecoder(body).Decode(&v) c.Assert(err, checker.IsNil) body.Close() var cpuPercent = 0.0 cpuDelta := float64(v.CPUStats.CPUUsage.TotalUsage - v.PreCPUStats.CPUUsage.TotalUsage) systemDelta := float64(v.CPUStats.SystemUsage - v.PreCPUStats.SystemUsage) cpuPercent = (cpuDelta / systemDelta) * float64(len(v.CPUStats.CPUUsage.PercpuUsage)) * 100.0 c.Assert(cpuPercent, check.Not(checker.Equals), 0.0, check.Commentf("docker stats with no-stream get cpu usage failed: was %v", cpuPercent)) } func (s *DockerSuite) TestApiStatsStoppedContainerInGoroutines(c *check.C) { testRequires(c, DaemonIsLinux) out, _ := dockerCmd(c, "run", "-d", "busybox", "/bin/sh", "-c", "echo 1") id := strings.TrimSpace(out) getGoRoutines := func() int { _, body, err := sockRequestRaw("GET", fmt.Sprintf("/info"), nil, "") c.Assert(err, checker.IsNil) info := types.Info{} err = json.NewDecoder(body).Decode(&info) c.Assert(err, checker.IsNil) body.Close() return info.NGoroutines } // When the HTTP connection is closed, the number of goroutines should not increase. routines := getGoRoutines() _, body, err := sockRequestRaw("GET", fmt.Sprintf("/containers/%s/stats", id), nil, "") c.Assert(err, checker.IsNil) body.Close() t := time.After(30 * time.Second) for { select { case <-t: c.Assert(getGoRoutines(), checker.LessOrEqualThan, routines) return default: if n := getGoRoutines(); n <= routines { return } time.Sleep(200 * time.Millisecond) } } } func (s *DockerSuite) TestApiStatsNetworkStats(c *check.C) { testRequires(c, SameHostDaemon) testRequires(c, DaemonIsLinux) // Run container for 30 secs out, _ := dockerCmd(c, "run", "-d", "busybox", "top") id := strings.TrimSpace(out) c.Assert(waitRun(id), checker.IsNil) // Retrieve the container address contIP := findContainerIP(c, id, "bridge") numPings := 10 var preRxPackets uint64 var preTxPackets uint64 var postRxPackets uint64 var postTxPackets uint64 // Get the container networking stats before and after pinging the container nwStatsPre := getNetworkStats(c, id) for _, v := range nwStatsPre { preRxPackets += v.RxPackets preTxPackets += v.TxPackets } countParam := "-c" if runtime.GOOS == "windows" { countParam = "-n" // Ping count parameter is -n on Windows } pingout, err := exec.Command("ping", contIP, countParam, strconv.Itoa(numPings)).Output() pingouts := string(pingout[:]) c.Assert(err, checker.IsNil) nwStatsPost := getNetworkStats(c, id) for _, v := range nwStatsPost { postRxPackets += v.RxPackets postTxPackets += v.TxPackets } // Verify the stats contain at least the expected number of packets (account for ARP) expRxPkts := 1 + preRxPackets + uint64(numPings) expTxPkts := 1 + preTxPackets + uint64(numPings) c.Assert(postTxPackets, checker.GreaterOrEqualThan, expTxPkts, check.Commentf("Reported less TxPackets than expected. Expected >= %d. Found %d. %s", expTxPkts, postTxPackets, pingouts)) c.Assert(postRxPackets, checker.GreaterOrEqualThan, expRxPkts, check.Commentf("Reported less Txbytes than expected. Expected >= %d. Found %d. %s", expRxPkts, postRxPackets, pingouts)) } func (s *DockerSuite) TestApiStatsNetworkStatsVersioning(c *check.C) { testRequires(c, SameHostDaemon) testRequires(c, DaemonIsLinux) // Run container for 30 secs out, _ := dockerCmd(c, "run", "-d", "busybox", "top") id := strings.TrimSpace(out) c.Assert(waitRun(id), checker.IsNil) for i := 17; i <= 21; i++ { apiVersion := fmt.Sprintf("v1.%d", i) for _, statsJSONBlob := range getVersionedStats(c, id, 3, apiVersion) { if version.Version(apiVersion).LessThan("v1.21") { c.Assert(jsonBlobHasLTv121NetworkStats(statsJSONBlob), checker.Equals, true, check.Commentf("Stats JSON blob from API %s %#v does not look like a =v1.21 API stats structure", apiVersion, statsJSONBlob)) } } } } func getNetworkStats(c *check.C, id string) map[string]types.NetworkStats { var st *types.StatsJSON _, body, err := sockRequestRaw("GET", fmt.Sprintf("/containers/%s/stats?stream=false", id), nil, "") c.Assert(err, checker.IsNil) err = json.NewDecoder(body).Decode(&st) c.Assert(err, checker.IsNil) body.Close() return st.Networks } // getVersionedNetworkStats returns a slice of numStats stats results for the // container with id id using an API call with version apiVersion. Since the // stats result type differs between API versions, we simply return // []map[string]interface{}. func getVersionedStats(c *check.C, id string, numStats int, apiVersion string) []map[string]interface{} { stats := make([]map[string]interface{}, numStats) requestPath := fmt.Sprintf("/%s/containers/%s/stats?stream=true", apiVersion, id) _, body, err := sockRequestRaw("GET", requestPath, nil, "") c.Assert(err, checker.IsNil) defer body.Close() statsDecoder := json.NewDecoder(body) for i := range stats { err = statsDecoder.Decode(&stats[i]) c.Assert(err, checker.IsNil, check.Commentf("failed to decode %dth stat: %s", i, err)) } return stats } func jsonBlobHasLTv121NetworkStats(blob map[string]interface{}) bool { networkStatsIntfc, ok := blob["network"] if !ok { return false } networkStats, ok := networkStatsIntfc.(map[string]interface{}) if !ok { return false } for _, expectedKey := range expectedNetworkInterfaceStats { if _, ok := networkStats[expectedKey]; !ok { return false } } return true } func jsonBlobHasGTE121NetworkStats(blob map[string]interface{}) bool { networksStatsIntfc, ok := blob["networks"] if !ok { return false } networksStats, ok := networksStatsIntfc.(map[string]interface{}) if !ok { return false } for _, networkInterfaceStatsIntfc := range networksStats { networkInterfaceStats, ok := networkInterfaceStatsIntfc.(map[string]interface{}) if !ok { return false } for _, expectedKey := range expectedNetworkInterfaceStats { if _, ok := networkInterfaceStats[expectedKey]; !ok { return false } } } return true } func (s *DockerSuite) TestApiStatsContainerNotFound(c *check.C) { testRequires(c, DaemonIsLinux) status, _, err := sockRequest("GET", "/containers/nonexistent/stats", nil) c.Assert(err, checker.IsNil) c.Assert(status, checker.Equals, http.StatusNotFound) status, _, err = sockRequest("GET", "/containers/nonexistent/stats?stream=0", nil) c.Assert(err, checker.IsNil) c.Assert(status, checker.Equals, http.StatusNotFound) }