v2 podman stats

Signed-off-by: baude <bbaude@redhat.com>

5 files changed, 94 insertions, 3 deletions

diff --git a/pkg/domain/entities/containers.go b/pkg/domain/entities/containers.go
index 622e8eb5b..071eff2fc 100644
--- a/pkg/domain/entities/containers.go
+++ b/pkg/domain/entities/containers.go
@@ -367,3 +367,14 @@ type ContainerCpOptions struct {
 // ContainerCpReport describes the output from a cp operation
 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
+}
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index eebf4c033..9f2abac65 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -35,6 +35,7 @@ type ContainerEngine interface {
 	ContainerRm(ctx context.Context, namesOrIds []string, options RmOptions) ([]*RmReport, error)
 	ContainerRun(ctx context.Context, opts ContainerRunOptions) (*ContainerRunReport, error)
 	ContainerStart(ctx context.Context, namesOrIds []string, options ContainerStartOptions) ([]*ContainerStartReport, error)
+	ContainerStats(ctx context.Context, namesOrIds []string, options ContainerStatsOptions) 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 f4996583a..bb7f0118d 100644
--- a/pkg/domain/infra/abi/containers.go
+++ b/pkg/domain/infra/abi/containers.go
@@ -8,8 +8,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
-
-	lpfilters "github.com/containers/libpod/libpod/filters"
+	"time"
 
 	"github.com/containers/buildah"
 	"github.com/containers/common/pkg/config"
@@ -17,8 +16,10 @@ import (
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/libpod/define"
 	"github.com/containers/libpod/libpod/events"
+	lpfilters "github.com/containers/libpod/libpod/filters"
 	"github.com/containers/libpod/libpod/image"
 	"github.com/containers/libpod/libpod/logs"
+	"github.com/containers/libpod/pkg/cgroups"
 	"github.com/containers/libpod/pkg/checkpoint"
 	"github.com/containers/libpod/pkg/domain/entities"
 	"github.com/containers/libpod/pkg/domain/infra/abi/terminal"
@@ -998,3 +999,76 @@ func (ic *ContainerEngine) Shutdown(_ context.Context) {
 		_ = ic.Libpod.Shutdown(false)
 	})
 }
+
+func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) error {
+	containerFunc := ic.Libpod.GetRunningContainers
+	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()
+			if err != nil {
+				return nil, err
+			}
+			return []*libpod.Container{lastCtr}, nil
+		}
+	case options.All:
+		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
+		}
+		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
+				}
+				if err != nil {
+					return err
+				}
+				containerStats[id] = initialStats
+			}
+			stats, err := ctr.GetContainerStats(containerStats[id])
+			if err != nil && errors.Cause(err) != define.ErrNoSuchCtr {
+				return err
+			}
+			// replace the previous measurement with the current one
+			containerStats[id] = stats
+			reportStats = append(reportStats, stats)
+		}
+		ctrs, err = containerFunc()
+		if err != nil {
+			return err
+		}
+		options.StatChan <- reportStats
+		if options.NoStream {
+			break
+		}
+		time.Sleep(time.Second)
+	}
+	return nil
+}
diff --git a/pkg/domain/infra/abi/pods_stats.go b/pkg/domain/infra/abi/pods_stats.go
index a41c01da0..c6befcf95 100644
--- a/pkg/domain/infra/abi/pods_stats.go
+++ b/pkg/domain/infra/abi/pods_stats.go
@@ -8,6 +8,7 @@ import (
 	"github.com/containers/libpod/pkg/cgroups"
 	"github.com/containers/libpod/pkg/domain/entities"
 	"github.com/containers/libpod/pkg/rootless"
+	"github.com/containers/libpod/utils"
 	"github.com/docker/go-units"
 	"github.com/pkg/errors"
 )
@@ -68,7 +69,7 @@ func combineHumanValues(a, b uint64) string {
 }
 
 func floatToPercentString(f float64) string {
-	strippedFloat, err := libpod.RemoveScientificNotationFromFloat(f)
+	strippedFloat, err := utils.RemoveScientificNotationFromFloat(f)
 	if err != nil || strippedFloat == 0 {
 		// If things go bazinga, return a safe value
 		return "--"
diff --git a/pkg/domain/infra/tunnel/containers.go b/pkg/domain/infra/tunnel/containers.go
index 32f9c4e36..227b660f7 100644
--- a/pkg/domain/infra/tunnel/containers.go
+++ b/pkg/domain/infra/tunnel/containers.go
@@ -387,3 +387,7 @@ func (ic *ContainerEngine) ContainerCp(ctx context.Context, source, dest string,
 // Shutdown Libpod engine
 func (ic *ContainerEngine) Shutdown(_ context.Context) {
 }
+
+func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []string, options entities.ContainerStatsOptions) error {
+	return errors.New("not implemented")
+}