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authorOpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com>2020-04-27 16:15:09 +0200
committerGitHub <noreply@github.com>2020-04-27 16:15:09 +0200
commitca1c674d2e027b563c3e9fd92c335eb3f5e5e05d (patch)
tree00dbd2d1590ed9f7fa59531dae3d1f63fdcbf014 /pkg/domain/infra/abi
parentfdf64f0c66be4569732b830ce60c98f98a7efe64 (diff)
parent7ee0f7e14c3105be1ef9c8aee00a09b479303677 (diff)
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Merge pull request #5966 from vrothberg/v2-pod-stats
implement pod stats
Diffstat (limited to 'pkg/domain/infra/abi')
-rw-r--r--pkg/domain/infra/abi/pods_stats.go85
1 files changed, 85 insertions, 0 deletions
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)
+}