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