Merge pull request #11003 from pascomnet/f_stats

stats: add a interval parameter to cli and api stats streaming

cmd/podman/containers/stats.go

@@ -5,6 +5,7 @@ import (
 	"os"
 
 	tm "github.com/buger/goterm"
+	"github.com/containers/common/pkg/completion"
 	"github.com/containers/common/pkg/report"
 	"github.com/containers/podman/v3/cmd/podman/common"
 	"github.com/containers/podman/v3/cmd/podman/registry"
@@ -16,7 +17,6 @@ import (
 	"github.com/containers/podman/v3/utils"
 	"github.com/docker/go-units"
 	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -55,6 +55,7 @@ type statsOptionsCLI struct {
 	Latest   bool
 	NoReset  bool
 	NoStream bool
+	Interval int
 }
 
 var (
@@ -72,6 +73,9 @@ func statFlags(cmd *cobra.Command) {
 
 	flags.BoolVar(&statsOptions.NoReset, "no-reset", false, "Disable resetting the screen between intervals")
 	flags.BoolVar(&statsOptions.NoStream, "no-stream", false, "Disable streaming stats and only pull the first result, default setting is false")
+	intervalFlagName := "interval"
+	flags.IntVarP(&statsOptions.Interval, intervalFlagName, "i", 5, "Time in seconds between stats reports")
+	_ = cmd.RegisterFlagCompletionFunc(intervalFlagName, completion.AutocompleteNone)
 }
 
 func init() {
@@ -124,6 +128,7 @@ func stats(cmd *cobra.Command, args []string) error {
 	opts := entities.ContainerStatsOptions{
 		Latest:   statsOptions.Latest,
 		Stream:   !statsOptions.NoStream,
+		Interval: statsOptions.Interval,
 	}
 	statsChan, err := registry.ContainerEngine().ContainerStats(registry.Context(), args, opts)
 	if err != nil {
@@ -134,7 +139,7 @@ func stats(cmd *cobra.Command, args []string) error {
 			return report.Error
 		}
 		if err := outputStats(report.Stats); err != nil {
-			logrus.Error(err)
+			return err
 		}
 	}
 	return nil

docs/source/markdown/podman-stats.1.md

@@ -37,6 +37,10 @@ Do not clear the terminal/screen in between reporting intervals
 
 Disable streaming stats and only pull the first result, default setting is false
 
+#### **--interval**=*seconds*, **-i**=*seconds*
+
+Time in seconds between stats reports, defaults to 5 seconds.
+
 #### **--format**=*template*
 
 Pretty-print container statistics to JSON or using a Go template

pkg/api/handlers/libpod/containers_stats.go

@@ -3,7 +3,6 @@ package libpod
 import (
 	"encoding/json"
 	"net/http"
-	"time"
 
 	"github.com/containers/podman/v3/libpod"
 	"github.com/containers/podman/v3/pkg/api/handlers/utils"
@@ -16,8 +15,6 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-const DefaultStatsPeriod = 5 * time.Second
-
 func StatsContainer(w http.ResponseWriter, r *http.Request) {
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
 	decoder := r.Context().Value("decoder").(*schema.Decoder)
@@ -35,8 +32,10 @@ func StatsContainer(w http.ResponseWriter, r *http.Request) {
 	query := struct {
 		Containers []string `schema:"containers"`
 		Stream     bool     `schema:"stream"`
+		Interval   int      `schema:"interval"`
 	}{
 		Stream:   true,
+		Interval: 5,
 	}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
@@ -49,6 +48,7 @@ func StatsContainer(w http.ResponseWriter, r *http.Request) {
 
 	statsOptions := entities.ContainerStatsOptions{
 		Stream:   query.Stream,
+		Interval: query.Interval,
 	}
 
 	// Stats will stop if the connection is closed.

pkg/api/server/register_containers.go

@@ -1108,6 +1108,11 @@ func (s *APIServer) registerContainersHandlers(r *mux.Router) error {
 	//    type: boolean
 	//    default: true
 	//    description: Stream the output
+	//  - in: query
+	//    name: interval
+	//    type: integer
+	//    default: 5
+	//    description: Time in seconds between stats reports
 	// produces:
 	// - application/json
 	// responses:

pkg/bindings/containers/containers.go

@@ -223,6 +223,9 @@ func Stats(ctx context.Context, containers []string, options *StatsOptions) (cha
 	if err != nil {
 		return nil, err
 	}
+	if !response.IsSuccess() {
+		return nil, response.Process(nil)
+	}
 
 	statsChan := make(chan entities.ContainerStatsReport)
 

pkg/bindings/containers/types.go

@@ -167,6 +167,7 @@ type StartOptions struct {
 // StatsOptions are optional options for getting stats on containers
 type StatsOptions struct {
 	Stream   *bool
+	Interval *int
 }
 
 //go:generate go run ../generator/generator.go TopOptions

pkg/bindings/containers/types_stats_options.go

@@ -35,3 +35,19 @@ func (o *StatsOptions) GetStream() bool {
 	}
 	return *o.Stream
 }
+
+// WithInterval
+func (o *StatsOptions) WithInterval(value int) *StatsOptions {
+	v := &value
+	o.Interval = v
+	return o
+}
+
+// GetInterval
+func (o *StatsOptions) GetInterval() int {
+	var interval int
+	if o.Interval == nil {
+		return interval
+	}
+	return *o.Interval
+}

pkg/domain/entities/containers.go

@@ -440,6 +440,8 @@ type ContainerStatsOptions struct {
 	Latest bool
 	// Stream stats.
 	Stream bool
+	// Interval in seconds
+	Interval int
 }
 
 // ContainerStatsReport is used for streaming container stats.

pkg/domain/infra/abi/containers.go

@@ -1283,6 +1283,9 @@ func (ic *ContainerEngine) Shutdown(_ context.Context) {
 }
 
 func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) (statsChan chan entities.ContainerStatsReport, err error) {
+	if options.Interval < 1 {
+		return nil, errors.New("Invalid interval, must be a positive number greater zero")
+	}
 	statsChan = make(chan entities.ContainerStatsReport, 1)
 
 	containerFunc := ic.Libpod.GetRunningContainers
@@ -1363,7 +1366,7 @@ func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []stri
 			return
 		}
 
-		time.Sleep(time.Second)
+		time.Sleep(time.Second * time.Duration(options.Interval))
 		goto stream
 	}()
 

pkg/domain/infra/tunnel/containers.go

@@ -873,7 +873,7 @@ func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []stri
 	if options.Latest {
 		return nil, errors.New("latest is not supported for the remote client")
 	}
-	return containers.Stats(ic.ClientCtx, namesOrIds, new(containers.StatsOptions).WithStream(options.Stream))
+	return containers.Stats(ic.ClientCtx, namesOrIds, new(containers.StatsOptions).WithStream(options.Stream).WithInterval(options.Interval))
 }
 
 // ShouldRestart reports back whether the container will restart

test/e2e/pod_stats_test.go

@@ -37,19 +37,19 @@ var _ = Describe("Podman pod stats", func() {
 		processTestResult(f)
 
 	})
-	It("podman stats should run with no pods", func() {
+	It("podman pod stats should run with no pods", func() {
 		session := podmanTest.Podman([]string{"pod", "stats", "--no-stream"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 	})
 
-	It("podman stats with a bogus pod", func() {
+	It("podman pod stats with a bogus pod", func() {
 		session := podmanTest.Podman([]string{"pod", "stats", "foobar"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(125))
 	})
 
-	It("podman stats on a specific running pod", func() {
+	It("podman pod stats on a specific running pod", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -66,7 +66,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 	})
 
-	It("podman stats on a specific running pod with shortID", func() {
+	It("podman pod stats on a specific running pod with shortID", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -83,7 +83,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 	})
 
-	It("podman stats on a specific running pod with name", func() {
+	It("podman pod stats on a specific running pod with name", func() {
 		_, ec, podid := podmanTest.CreatePod(map[string][]string{"--name": {"test"}})
 		Expect(ec).To(Equal(0))
 
@@ -100,7 +100,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 	})
 
-	It("podman stats on running pods", func() {
+	It("podman pod stats on running pods", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -117,7 +117,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 	})
 
-	It("podman stats on all pods", func() {
+	It("podman pod stats on all pods", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -134,7 +134,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 	})
 
-	It("podman stats with json output", func() {
+	It("podman pod stats with json output", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -151,7 +151,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).Should(Exit(0))
 		Expect(stats.IsJSONOutputValid()).To(BeTrue())
 	})
-	It("podman stats with GO template", func() {
+	It("podman pod stats with GO template", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -163,7 +163,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).To(Exit(0))
 	})
 
-	It("podman stats with invalid GO template", func() {
+	It("podman pod stats with invalid GO template", func() {
 		_, ec, podid := podmanTest.CreatePod(nil)
 		Expect(ec).To(Equal(0))
 
@@ -175,7 +175,7 @@ var _ = Describe("Podman pod stats", func() {
 		Expect(stats).To(ExitWithError())
 	})
 
-	It("podman stats on net=host post", func() {
+	It("podman pod stats on net=host post", func() {
 		SkipIfRootless("--net=host not supported for rootless pods at present")
 		podName := "testPod"
 		podCreate := podmanTest.Podman([]string{"pod", "create", "--net=host", "--name", podName})

test/e2e/stats_test.go

@@ -1,5 +1,3 @@
-// +build
-
 package integration
 
 import (
@@ -84,15 +82,49 @@ var _ = Describe("Podman stats", func() {
 		Expect(session).Should(Exit(0))
 	})
 
-	It("podman stats only output CPU data", func() {
+	It("podman stats with GO template", func() {
 		session := podmanTest.RunTopContainer("")
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
-		session = podmanTest.Podman([]string{"stats", "--all", "--no-stream", "--format", "\"{{.ID}} {{.UpTime}} {{.AVGCPU}}\""})
+		stats := podmanTest.Podman([]string{"stats", "-a", "--no-reset", "--no-stream", "--format", "table {{.ID}} {{.AVGCPU}} {{.MemUsage}} {{.CPU}} {{.NetIO}} {{.BlockIO}} {{.PIDS}}"})
+		stats.WaitWithDefaultTimeout()
+		Expect(stats).To(Exit(0))
+	})
+
+	It("podman stats with invalid GO template", func() {
+		session := podmanTest.RunTopContainer("")
 		session.WaitWithDefaultTimeout()
-		Expect(session.LineInOutputContains("UpTime")).To(BeTrue())
-		Expect(session.LineInOutputContains("AVGCPU")).To(BeTrue())
 		Expect(session).Should(Exit(0))
+		stats := podmanTest.Podman([]string{"stats", "-a", "--no-reset", "--no-stream", "--format", "\"table {{.ID}} {{.NoSuchField}} \""})
+		stats.WaitWithDefaultTimeout()
+		Expect(stats).To(ExitWithError())
+	})
+
+	It("podman stats with negative interval", func() {
+		session := podmanTest.RunTopContainer("")
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+		stats := podmanTest.Podman([]string{"stats", "-a", "--no-reset", "--no-stream", "--interval=-1"})
+		stats.WaitWithDefaultTimeout()
+		Expect(stats).To(ExitWithError())
+	})
+
+	It("podman stats with zero interval", func() {
+		session := podmanTest.RunTopContainer("")
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+		stats := podmanTest.Podman([]string{"stats", "-a", "--no-reset", "--no-stream", "--interval=0"})
+		stats.WaitWithDefaultTimeout()
+		Expect(stats).To(ExitWithError())
+	})
+
+	It("podman stats with interval", func() {
+		session := podmanTest.RunTopContainer("")
+		session.WaitWithDefaultTimeout()
+		Expect(session).Should(Exit(0))
+		stats := podmanTest.Podman([]string{"stats", "-a", "--no-reset", "--no-stream", "--interval=5"})
+		stats.WaitWithDefaultTimeout()
+		Expect(stats).Should(Exit(0))
 	})
 
 	It("podman stats with json output", func() {