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-rw-r--r--pkg/api/handlers/libpod/containers_stats.go72
-rw-r--r--pkg/api/server/register_containers.go31
-rw-r--r--pkg/bindings/containers/containers.go51
-rw-r--r--pkg/domain/entities/containers.go19
-rw-r--r--pkg/domain/entities/engine_container.go2
-rw-r--r--pkg/domain/infra/abi/containers.go116
-rw-r--r--pkg/domain/infra/tunnel/containers.go7
7 files changed, 236 insertions, 62 deletions
diff --git a/pkg/api/handlers/libpod/containers_stats.go b/pkg/api/handlers/libpod/containers_stats.go
new file mode 100644
index 000000000..4d5abe118
--- /dev/null
+++ b/pkg/api/handlers/libpod/containers_stats.go
@@ -0,0 +1,72 @@
+package libpod
+
+import (
+ "encoding/json"
+ "net/http"
+ "time"
+
+ "github.com/containers/podman/v2/libpod"
+ "github.com/containers/podman/v2/pkg/api/handlers/utils"
+ "github.com/containers/podman/v2/pkg/domain/entities"
+ "github.com/containers/podman/v2/pkg/domain/infra/abi"
+ "github.com/gorilla/schema"
+ "github.com/pkg/errors"
+ "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)
+
+ query := struct {
+ Containers []string `schema:"containers"`
+ Stream bool `schema:"stream"`
+ }{
+ Stream: true,
+ }
+ 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()))
+ return
+ }
+
+ // Reduce code duplication and use the local/abi implementation of
+ // container stats.
+ containerEngine := abi.ContainerEngine{Libpod: runtime}
+
+ statsOptions := entities.ContainerStatsOptions{
+ Stream: query.Stream,
+ }
+
+ // Stats will stop if the connection is closed.
+ statsChan, err := containerEngine.ContainerStats(r.Context(), query.Containers, statsOptions)
+ if err != nil {
+ utils.InternalServerError(w, err)
+ return
+ }
+
+ // Write header and content type.
+ w.WriteHeader(http.StatusOK)
+ w.Header().Add("Content-Type", "application/json")
+ if flusher, ok := w.(http.Flusher); ok {
+ flusher.Flush()
+ }
+
+ // Setup JSON encoder for streaming.
+ coder := json.NewEncoder(w)
+ coder.SetEscapeHTML(true)
+
+ for stats := range statsChan {
+ if err := coder.Encode(stats); err != nil {
+ // Note: even when streaming, the stats goroutine will
+ // be notified (and stop) as the connection will be
+ // closed.
+ logrus.Errorf("Unable to encode stats: %v", err)
+ return
+ }
+ if flusher, ok := w.(http.Flusher); ok {
+ flusher.Flush()
+ }
+ }
+}
diff --git a/pkg/api/server/register_containers.go b/pkg/api/server/register_containers.go
index 0ad5d29ea..870c6a90c 100644
--- a/pkg/api/server/register_containers.go
+++ b/pkg/api/server/register_containers.go
@@ -1013,7 +1013,7 @@ func (s *APIServer) registerContainersHandlers(r *mux.Router) error {
// tags:
// - containers
// summary: Get stats for a container
- // description: This returns a live stream of a container’s resource usage statistics.
+ // description: DEPRECATED. This endpoint will be removed with the next major release. Please use /libpod/containers/stats instead.
// parameters:
// - in: path
// name: name
@@ -1035,6 +1035,35 @@ func (s *APIServer) registerContainersHandlers(r *mux.Router) error {
// 500:
// $ref: "#/responses/InternalError"
r.HandleFunc(VersionedPath("/libpod/containers/{name}/stats"), s.APIHandler(compat.StatsContainer)).Methods(http.MethodGet)
+ // swagger:operation GET /libpod/containers/stats libpod libpodStatsContainers
+ // ---
+ // tags:
+ // - containers
+ // summary: Get stats for one or more containers
+ // description: Return a live stream of resource usage statistics of one or more container. If no container is specified, the statistics of all containers are returned.
+ // parameters:
+ // - in: query
+ // name: containers
+ // description: names or IDs of containers
+ // type: array
+ // items:
+ // type: string
+ // - in: query
+ // name: stream
+ // type: boolean
+ // default: true
+ // description: Stream the output
+ // produces:
+ // - application/json
+ // responses:
+ // 200:
+ // description: no error
+ // 404:
+ // $ref: "#/responses/NoSuchContainer"
+ // 500:
+ // $ref: "#/responses/InternalError"
+ r.HandleFunc(VersionedPath("/libpod/containers/stats"), s.APIHandler(libpod.StatsContainer)).Methods(http.MethodGet)
+
// swagger:operation GET /libpod/containers/{name}/top libpod libpodTopContainer
// ---
// tags:
diff --git a/pkg/bindings/containers/containers.go b/pkg/bindings/containers/containers.go
index 981912665..46e4df1d2 100644
--- a/pkg/bindings/containers/containers.go
+++ b/pkg/bindings/containers/containers.go
@@ -197,7 +197,56 @@ func Start(ctx context.Context, nameOrID string, detachKeys *string) error {
return response.Process(nil)
}
-func Stats() {}
+func Stats(ctx context.Context, containers []string, stream *bool) (chan entities.ContainerStatsReport, error) {
+ conn, err := bindings.GetClient(ctx)
+ if err != nil {
+ return nil, err
+ }
+ params := url.Values{}
+ if stream != nil {
+ params.Set("stream", strconv.FormatBool(*stream))
+ }
+ for _, c := range containers {
+ params.Add("containers", c)
+ }
+
+ response, err := conn.DoRequest(nil, http.MethodGet, "/containers/stats", params, nil)
+ if err != nil {
+ return nil, err
+ }
+
+ statsChan := make(chan entities.ContainerStatsReport)
+
+ go func() {
+ defer close(statsChan)
+
+ dec := json.NewDecoder(response.Body)
+ doStream := true
+ if stream != nil {
+ doStream = *stream
+ }
+
+ streamLabel: // label to flatten the scope
+ select {
+ case <-response.Request.Context().Done():
+ return // lost connection - maybe the server quit
+ default:
+ // fall through and do some work
+ }
+ var report entities.ContainerStatsReport
+ if err := dec.Decode(&report); err != nil {
+ report = entities.ContainerStatsReport{Error: err}
+ }
+ statsChan <- report
+
+ if report.Error != nil || !doStream {
+ return
+ }
+ goto streamLabel
+ }()
+
+ return statsChan, nil
+}
// Top gathers statistics about the running processes in a container. The nameOrID can be a container name
// or a partial/full ID. The descriptors allow for specifying which data to collect from the process.
diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index 16997cdd1..7b272f01e 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -411,10 +411,17 @@ type ContainerCpReport struct {
// ContainerStatsOptions describes input options for getting
// stats on containers
type ContainerStatsOptions struct {
- All bool
- Format string
- Latest bool
- NoReset bool
- NoStream bool
- StatChan chan []*define.ContainerStats
+ // Operate on the latest known container. Only supported for local
+ // clients.
+ Latest bool
+ // Stream stats.
+ Stream bool
+}
+
+// ContainerStatsReport is used for streaming container stats.
+type ContainerStatsReport struct {
+ // Error from reading stats.
+ Error error
+ // Results, set when there is no error.
+ Stats []define.ContainerStats
}
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 6c85c9267..f105dc333 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -38,7 +38,7 @@ type ContainerEngine interface {
ContainerRun(ctx context.Context, opts ContainerRunOptions) (*ContainerRunReport, error)
ContainerRunlabel(ctx context.Context, label string, image string, args []string, opts ContainerRunlabelOptions) error
ContainerStart(ctx context.Context, namesOrIds []string, options ContainerStartOptions) ([]*ContainerStartReport, error)
- ContainerStats(ctx context.Context, namesOrIds []string, options ContainerStatsOptions) error
+ ContainerStats(ctx context.Context, namesOrIds []string, options ContainerStatsOptions) (chan ContainerStatsReport, error)
ContainerStop(ctx context.Context, namesOrIds []string, options StopOptions) ([]*StopReport, error)
ContainerTop(ctx context.Context, options TopOptions) (*StringSliceReport, error)
ContainerUnmount(ctx context.Context, nameOrIDs []string, options ContainerUnmountOptions) ([]*ContainerUnmountReport, error)
diff --git a/pkg/domain/infra/abi/containers.go b/pkg/domain/infra/abi/containers.go
index 21618f555..8b0d53940 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -1142,12 +1142,12 @@ func (ic *ContainerEngine) Shutdown(_ context.Context) {
})
}
-func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) error {
- defer close(options.StatChan)
+func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) (statsChan chan entities.ContainerStatsReport, err error) {
+ statsChan = make(chan entities.ContainerStatsReport, 1)
+
containerFunc := ic.Libpod.GetRunningContainers
+ queryAll := false
switch {
- case len(namesOrIds) > 0:
- containerFunc = func() ([]*libpod.Container, error) { return ic.Libpod.GetContainersByList(namesOrIds) }
case options.Latest:
containerFunc = func() ([]*libpod.Container, error) {
lastCtr, err := ic.Libpod.GetLatestContainer()
@@ -1156,62 +1156,76 @@ func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []stri
}
return []*libpod.Container{lastCtr}, nil
}
- case options.All:
+ case len(namesOrIds) > 0:
+ containerFunc = func() ([]*libpod.Container, error) { return ic.Libpod.GetContainersByList(namesOrIds) }
+ default:
+ // No containers, no latest -> query all!
+ queryAll = true
containerFunc = ic.Libpod.GetAllContainers
}
- ctrs, err := containerFunc()
- if err != nil {
- return errors.Wrapf(err, "unable to get list of containers")
- }
- containerStats := map[string]*define.ContainerStats{}
- for _, ctr := range ctrs {
- initialStats, err := ctr.GetContainerStats(&define.ContainerStats{})
- if err != nil {
- // when doing "all", don't worry about containers that are not running
- cause := errors.Cause(err)
- if options.All && (cause == define.ErrCtrRemoved || cause == define.ErrNoSuchCtr || cause == define.ErrCtrStateInvalid) {
- continue
- }
- if cause == cgroups.ErrCgroupV1Rootless {
- err = cause
- }
- return err
+ go func() {
+ defer close(statsChan)
+ var (
+ err error
+ containers []*libpod.Container
+ containerStats map[string]*define.ContainerStats
+ )
+ containerStats = make(map[string]*define.ContainerStats)
+
+ stream: // label to flatten the scope
+ select {
+ case <-ctx.Done():
+ // client cancelled
+ logrus.Debugf("Container stats stopped: context cancelled")
+ return
+ default:
+ // just fall through and do work
}
- containerStats[ctr.ID()] = initialStats
- }
- for {
- reportStats := []*define.ContainerStats{}
- for _, ctr := range ctrs {
- id := ctr.ID()
- if _, ok := containerStats[ctr.ID()]; !ok {
- initialStats, err := ctr.GetContainerStats(&define.ContainerStats{})
- if errors.Cause(err) == define.ErrCtrRemoved || errors.Cause(err) == define.ErrNoSuchCtr || errors.Cause(err) == define.ErrCtrStateInvalid {
- // skip dealing with a container that is gone
- continue
+
+ // Anonymous func to easily use the return values for streaming.
+ computeStats := func() ([]define.ContainerStats, error) {
+ containers, err = containerFunc()
+ if err != nil {
+ return nil, errors.Wrapf(err, "unable to get list of containers")
+ }
+
+ reportStats := []define.ContainerStats{}
+ for _, ctr := range containers {
+ prev, ok := containerStats[ctr.ID()]
+ if !ok {
+ prev = &define.ContainerStats{}
}
+
+ stats, err := ctr.GetContainerStats(prev)
if err != nil {
- return err
+ cause := errors.Cause(err)
+ if queryAll && (cause == define.ErrCtrRemoved || cause == define.ErrNoSuchCtr || cause == define.ErrCtrStateInvalid) {
+ continue
+ }
+ if cause == cgroups.ErrCgroupV1Rootless {
+ err = cause
+ }
+ return nil, err
}
- containerStats[id] = initialStats
- }
- stats, err := ctr.GetContainerStats(containerStats[id])
- if err != nil && errors.Cause(err) != define.ErrNoSuchCtr {
- return err
+
+ containerStats[ctr.ID()] = stats
+ reportStats = append(reportStats, *stats)
}
- // replace the previous measurement with the current one
- containerStats[id] = stats
- reportStats = append(reportStats, stats)
+ return reportStats, nil
}
- ctrs, err = containerFunc()
- if err != nil {
- return err
- }
- options.StatChan <- reportStats
- if options.NoStream {
- break
+
+ report := entities.ContainerStatsReport{}
+ report.Stats, report.Error = computeStats()
+ statsChan <- report
+
+ if report.Error != nil || !options.Stream {
+ return
}
+
time.Sleep(time.Second)
- }
- return nil
+ goto stream
+ }()
+
+ return statsChan, nil
}
diff --git a/pkg/domain/infra/tunnel/containers.go b/pkg/domain/infra/tunnel/containers.go
index 7ea3b16a6..9b03503c6 100644
--- a/pkg/domain/infra/tunnel/containers.go
+++ b/pkg/domain/infra/tunnel/containers.go
@@ -722,6 +722,9 @@ func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string,
func (ic *ContainerEngine) Shutdown(_ context.Context) {
}
-func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) error {
- return errors.New("not implemented")
+func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) (statsChan chan entities.ContainerStatsReport, err error) {
+ if options.Latest {
+ return nil, errors.New("latest is not supported for the remote client")
+ }
+ return containers.Stats(ic.ClientCxt, namesOrIds, &options.Stream)
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-25 20:48:13 +0000