package abi import ( "context" "fmt" "github.com/containers/podman/v2/libpod" "github.com/containers/podman/v2/pkg/cgroups" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/containers/podman/v2/pkg/rootless" "github.com/containers/podman/v2/utils" "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), MemUsageBytes: combineBytesValues(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 combineBytesValues(a, b uint64) string { if a == 0 && b == 0 { return "-- / --" } return fmt.Sprintf("%s / %s", units.BytesSize(float64(a)), units.BytesSize(float64(b))) } func floatToPercentString(f float64) string { strippedFloat, err := utils.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) }