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authorValentin Rothberg <rothberg@redhat.com>2020-04-22 11:43:50 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-04-27 12:00:35 +0200
commit7ee0f7e14c3105be1ef9c8aee00a09b479303677 (patch)
tree2f55831368cc376a18876a6b201d7be91baaa299 /pkg/domain
parentefafd99e6d9e2555c2a167bc17d07629503a2c34 (diff)
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implement pod stats
Implement pod stats for the local and remote client. Both code paths end up in infra/abi to allow for code share. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'pkg/domain')
-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
4 files changed, 138 insertions, 0 deletions
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)
+}