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-rw-r--r--pkg/api/handlers/libpod/pods.go42
-rw-r--r--pkg/api/handlers/swagger/swagger.go7
-rw-r--r--pkg/api/handlers/utils/errors.go3
-rw-r--r--pkg/api/server/register_pods.go29
-rw-r--r--pkg/bindings/pods/pods.go29
-rw-r--r--pkg/domain/entities/engine_container.go1
-rw-r--r--pkg/domain/entities/pods.go48
-rw-r--r--pkg/domain/infra/abi/pods_stats.go85
-rw-r--r--pkg/domain/infra/tunnel/pods.go4
9 files changed, 242 insertions, 6 deletions
diff --git a/pkg/api/handlers/libpod/pods.go b/pkg/api/handlers/libpod/pods.go
index 618d48ac0..0b15ab0d6 100644
--- a/pkg/api/handlers/libpod/pods.go
+++ b/pkg/api/handlers/libpod/pods.go
@@ -11,6 +11,7 @@ import (
"github.com/containers/libpod/pkg/api/handlers"
"github.com/containers/libpod/pkg/api/handlers/utils"
"github.com/containers/libpod/pkg/domain/entities"
+ "github.com/containers/libpod/pkg/domain/infra/abi"
"github.com/containers/libpod/pkg/specgen"
"github.com/containers/libpod/pkg/specgen/generate"
"github.com/containers/libpod/pkg/util"
@@ -419,3 +420,44 @@ func PodExists(w http.ResponseWriter, r *http.Request) {
}
utils.WriteResponse(w, http.StatusNoContent, "")
}
+
+func PodStats(w http.ResponseWriter, r *http.Request) {
+ runtime := r.Context().Value("runtime").(*libpod.Runtime)
+ decoder := r.Context().Value("decoder").(*schema.Decoder)
+
+ query := struct {
+ NamesOrIDs []string `schema:"namesOrIDs"`
+ All bool `schema:"all"`
+ }{
+ // default would go here
+ }
+ if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+ utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+ errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+ return
+ }
+
+ // Validate input.
+ options := entities.PodStatsOptions{All: query.All}
+ if err := entities.ValidatePodStatsOptions(query.NamesOrIDs, &options); err != nil {
+ utils.InternalServerError(w, err)
+ }
+
+ // Collect the stats and send them over the wire.
+ containerEngine := abi.ContainerEngine{Libpod: runtime}
+ reports, err := containerEngine.PodStats(r.Context(), query.NamesOrIDs, options)
+
+ // Error checks as documented in swagger.
+ switch errors.Cause(err) {
+ case define.ErrNoSuchPod:
+ utils.Error(w, "one or more pods not found", http.StatusNotFound, err)
+ return
+ case nil:
+ // Nothing to do.
+ default:
+ utils.InternalServerError(w, err)
+ return
+ }
+
+ utils.WriteResponse(w, http.StatusOK, reports)
+}
diff --git a/pkg/api/handlers/swagger/swagger.go b/pkg/api/handlers/swagger/swagger.go
index 7d8932f56..0aceaf5f6 100644
--- a/pkg/api/handlers/swagger/swagger.go
+++ b/pkg/api/handlers/swagger/swagger.go
@@ -122,6 +122,13 @@ type swagPodTopResponse struct {
}
}
+// List processes in pod
+// swagger:response DocsPodStatsResponse
+type swagPodStatsResponse struct {
+ // in:body
+ Body []*entities.PodStatsReport
+}
+
// Inspect container
// swagger:response LibpodInspectContainerResponse
type swagLibpodInspectContainerResponse struct {
diff --git a/pkg/api/handlers/utils/errors.go b/pkg/api/handlers/utils/errors.go
index aafc64353..3253a9be3 100644
--- a/pkg/api/handlers/utils/errors.go
+++ b/pkg/api/handlers/utils/errors.go
@@ -14,6 +14,9 @@ var (
ErrLinkNotSupport = errors.New("Link is not supported")
)
+// TODO: document the exported functions in this file and make them more
+// generic (e.g., not tied to one ctr/pod).
+
// Error formats an API response to an error
//
// apiMessage and code must match the container API, and are sent to client
diff --git a/pkg/api/server/register_pods.go b/pkg/api/server/register_pods.go
index 63060af41..4156dd86b 100644
--- a/pkg/api/server/register_pods.go
+++ b/pkg/api/server/register_pods.go
@@ -286,9 +286,36 @@ func (s *APIServer) registerPodsHandlers(r *mux.Router) error {
// 200:
// $ref: "#/responses/DocsPodTopResponse"
// 404:
- // $ref: "#/responses/NoSuchContainer"
+ // $ref: "#/responses/NoSuchPod"
// 500:
// $ref: "#/responses/InternalError"
r.Handle(VersionedPath("/libpod/pods/{name}/top"), s.APIHandler(libpod.PodTop)).Methods(http.MethodGet)
+ // swagger:operation GET /libpod/pods/stats pods statsPod
+ // ---
+ // tags:
+ // - pods
+ // summary: Get stats for one or more pods
+ // description: Display a live stream of resource usage statistics for the containers in one or more pods
+ // parameters:
+ // - in: query
+ // name: all
+ // description: Provide statistics for all running pods.
+ // type: boolean
+ // - in: query
+ // name: namesOrIDs
+ // description: Names or IDs of pods.
+ // type: array
+ // items:
+ // type: string
+ // produces:
+ // - application/json
+ // responses:
+ // 200:
+ // $ref: "#/responses/DocsPodTopResponse"
+ // 404:
+ // $ref: "#/responses/NoSuchPod"
+ // 500:
+ // $ref: "#/responses/InternalError"
+ r.Handle(VersionedPath("/libpod/pods/stats"), s.APIHandler(libpod.PodStats)).Methods(http.MethodGet)
return nil
}
diff --git a/pkg/bindings/pods/pods.go b/pkg/bindings/pods/pods.go
index 3c60fa2a0..b213c8c73 100644
--- a/pkg/bindings/pods/pods.go
+++ b/pkg/bindings/pods/pods.go
@@ -2,6 +2,7 @@ package pods
import (
"context"
+ "errors"
"net/http"
"net/url"
"strconv"
@@ -189,11 +190,6 @@ func Start(ctx context.Context, nameOrID string) (*entities.PodStartReport, erro
return &report, response.Process(&report)
}
-func Stats() error {
- // TODO
- return bindings.ErrNotImplemented
-}
-
// Stop stops all containers in a Pod. The optional timeout parameter can be
// used to override the timeout before the container is killed.
func Stop(ctx context.Context, nameOrID string, timeout *int) (*entities.PodStopReport, error) {
@@ -264,3 +260,26 @@ func Unpause(ctx context.Context, nameOrID string) (*entities.PodUnpauseReport,
}
return &report, response.Process(&report)
}
+
+// Stats display resource-usage statistics of one or more pods.
+func Stats(ctx context.Context, namesOrIDs []string, options entities.PodStatsOptions) ([]*entities.PodStatsReport, error) {
+ if options.Latest {
+ return nil, errors.New("latest is not supported")
+ }
+ conn, err := bindings.GetClient(ctx)
+ if err != nil {
+ return nil, err
+ }
+ params := url.Values{}
+ for _, i := range namesOrIDs {
+ params.Add("namesOrIDs", i)
+ }
+ params.Set("all", strconv.FormatBool(options.All))
+
+ var reports []*entities.PodStatsReport
+ response, err := conn.DoRequest(nil, http.MethodGet, "/pods/stats", params)
+ if err != nil {
+ return nil, err
+ }
+ return reports, response.Process(&reports)
+}
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 8c5bc3058..502279bcf 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -53,6 +53,7 @@ type ContainerEngine interface {
PodRestart(ctx context.Context, namesOrIds []string, options PodRestartOptions) ([]*PodRestartReport, error)
PodRm(ctx context.Context, namesOrIds []string, options PodRmOptions) ([]*PodRmReport, error)
PodStart(ctx context.Context, namesOrIds []string, options PodStartOptions) ([]*PodStartReport, error)
+ PodStats(ctx context.Context, namesOrIds []string, options PodStatsOptions) ([]*PodStatsReport, error)
PodStop(ctx context.Context, namesOrIds []string, options PodStopOptions) ([]*PodStopReport, error)
PodTop(ctx context.Context, options PodTopOptions) (*StringSliceReport, error)
PodUnpause(ctx context.Context, namesOrIds []string, options PodunpauseOptions) ([]*PodUnpauseReport, error)
diff --git a/pkg/domain/entities/pods.go b/pkg/domain/entities/pods.go
index aa1445a6a..a4896ce4d 100644
--- a/pkg/domain/entities/pods.go
+++ b/pkg/domain/entities/pods.go
@@ -1,6 +1,7 @@
package entities
import (
+ "errors"
"strings"
"time"
@@ -188,3 +189,50 @@ type PodInspectOptions struct {
type PodInspectReport struct {
*define.InspectPodData
}
+
+// PodStatsOptions are options for the pod stats command.
+type PodStatsOptions struct {
+ // All - provide stats for all running pods.
+ All bool
+ // Latest - provide stats for the latest pod.
+ Latest bool
+}
+
+// PodStatsReport includes pod-resource statistics data.
+type PodStatsReport struct {
+ CPU string
+ MemUsage string
+ Mem string
+ NetIO string
+ BlockIO string
+ PIDS string
+ Pod string
+ CID string
+ Name string
+}
+
+// ValidatePodStatsOptions validates the specified slice and options. Allows
+// for sharing code in the front- and the back-end.
+func ValidatePodStatsOptions(args []string, options *PodStatsOptions) error {
+ num := 0
+ if len(args) > 0 {
+ num++
+ }
+ if options.All {
+ num++
+ }
+ if options.Latest {
+ num++
+ }
+ switch num {
+ case 0:
+ // Podman v1 compat: if nothing's specified get all running
+ // pods.
+ options.All = true
+ return nil
+ case 1:
+ return nil
+ default:
+ return errors.New("--all, --latest and arguments cannot be used together")
+ }
+}
diff --git a/pkg/domain/infra/abi/pods_stats.go b/pkg/domain/infra/abi/pods_stats.go
new file mode 100644
index 000000000..a41c01da0
--- /dev/null
+++ b/pkg/domain/infra/abi/pods_stats.go
@@ -0,0 +1,85 @@
+package abi
+
+import (
+ "context"
+ "fmt"
+
+ "github.com/containers/libpod/libpod"
+ "github.com/containers/libpod/pkg/cgroups"
+ "github.com/containers/libpod/pkg/domain/entities"
+ "github.com/containers/libpod/pkg/rootless"
+ "github.com/docker/go-units"
+ "github.com/pkg/errors"
+)
+
+// PodStats implements printing stats about pods.
+func (ic *ContainerEngine) PodStats(ctx context.Context, namesOrIds []string, options entities.PodStatsOptions) ([]*entities.PodStatsReport, error) {
+ // Cgroups v2 check for rootless.
+ if rootless.IsRootless() {
+ unified, err := cgroups.IsCgroup2UnifiedMode()
+ if err != nil {
+ return nil, err
+ }
+ if !unified {
+ return nil, errors.New("pod stats is not supported in rootless mode without cgroups v2")
+ }
+ }
+ // Get the (running) pods and convert them to the entities format.
+ pods, err := getPodsByContext(options.All, options.Latest, namesOrIds, ic.Libpod)
+ if err != nil {
+ return nil, errors.Wrap(err, "unable to get list of pods")
+ }
+ return ic.podsToStatsReport(pods)
+}
+
+// podsToStatsReport converts a slice of pods into a corresponding slice of stats reports.
+func (ic *ContainerEngine) podsToStatsReport(pods []*libpod.Pod) ([]*entities.PodStatsReport, error) {
+ reports := []*entities.PodStatsReport{}
+ for i := range pods { // Access by index to prevent potential loop-variable leaks.
+ podStats, err := pods[i].GetPodStats(nil)
+ if err != nil {
+ return nil, err
+ }
+ podID := pods[i].ID()[:12]
+ for j := range podStats {
+ r := entities.PodStatsReport{
+ CPU: floatToPercentString(podStats[j].CPU),
+ MemUsage: combineHumanValues(podStats[j].MemUsage, podStats[j].MemLimit),
+ Mem: floatToPercentString(podStats[j].MemPerc),
+ NetIO: combineHumanValues(podStats[j].NetInput, podStats[j].NetOutput),
+ BlockIO: combineHumanValues(podStats[j].BlockInput, podStats[j].BlockOutput),
+ PIDS: pidsToString(podStats[j].PIDs),
+ CID: podStats[j].ContainerID[:12],
+ Name: podStats[j].Name,
+ Pod: podID,
+ }
+ reports = append(reports, &r)
+ }
+ }
+
+ return reports, nil
+}
+
+func combineHumanValues(a, b uint64) string {
+ if a == 0 && b == 0 {
+ return "-- / --"
+ }
+ return fmt.Sprintf("%s / %s", units.HumanSize(float64(a)), units.HumanSize(float64(b)))
+}
+
+func floatToPercentString(f float64) string {
+ strippedFloat, err := libpod.RemoveScientificNotationFromFloat(f)
+ if err != nil || strippedFloat == 0 {
+ // If things go bazinga, return a safe value
+ return "--"
+ }
+ return fmt.Sprintf("%.2f", strippedFloat) + "%"
+}
+
+func pidsToString(pid uint64) string {
+ if pid == 0 {
+ // If things go bazinga, return a safe value
+ return "--"
+ }
+ return fmt.Sprintf("%d", pid)
+}
diff --git a/pkg/domain/infra/tunnel/pods.go b/pkg/domain/infra/tunnel/pods.go
index e7641c077..c193c6752 100644
--- a/pkg/domain/infra/tunnel/pods.go
+++ b/pkg/domain/infra/tunnel/pods.go
@@ -211,3 +211,7 @@ func (ic *ContainerEngine) PodInspect(ctx context.Context, options entities.PodI
}
return pods.Inspect(ic.ClientCxt, options.NameOrID)
}
+
+func (ic *ContainerEngine) PodStats(ctx context.Context, namesOrIds []string, options entities.PodStatsOptions) ([]*entities.PodStatsReport, error) {
+ return pods.Stats(ic.ClientCxt, namesOrIds, options)
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-12-25 06:33:22 +0000