podman-remote pod top|stats

this is the final enablement for the pod subcommand.  it includes the
ability to run podman-remote pod top and stats.

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

2 files changed, 82 insertions, 0 deletions

diff --git a/pkg/varlinkapi/containers.go b/pkg/varlinkapi/containers.go
index 27b8d15d2..61da19c83 100644
--- a/pkg/varlinkapi/containers.go
+++ b/pkg/varlinkapi/containers.go
@@ -552,3 +552,54 @@ func (i *LibpodAPI) ContainerStateData(call iopodman.VarlinkCall, name string) e
 	}
 	return call.ReplyContainerStateData(string(b))
 }
+
+// GetContainerStatsWithHistory is a varlink endpoint that returns container stats based on current and
+// previous statistics
+func (i *LibpodAPI) GetContainerStatsWithHistory(call iopodman.VarlinkCall, prevStats iopodman.ContainerStats) error {
+	con, err := i.Runtime.LookupContainer(prevStats.Id)
+	if err != nil {
+		return call.ReplyContainerNotFound(prevStats.Id, err.Error())
+	}
+	previousStats := ContainerStatsToLibpodContainerStats(prevStats)
+	stats, err := con.GetContainerStats(&previousStats)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	cStats := iopodman.ContainerStats{
+		Id:           stats.ContainerID,
+		Name:         stats.Name,
+		Cpu:          stats.CPU,
+		Cpu_nano:     int64(stats.CPUNano),
+		System_nano:  int64(stats.SystemNano),
+		Mem_usage:    int64(stats.MemUsage),
+		Mem_limit:    int64(stats.MemLimit),
+		Mem_perc:     stats.MemPerc,
+		Net_input:    int64(stats.NetInput),
+		Net_output:   int64(stats.NetOutput),
+		Block_input:  int64(stats.BlockInput),
+		Block_output: int64(stats.BlockOutput),
+		Pids:         int64(stats.PIDs),
+	}
+	return call.ReplyGetContainerStatsWithHistory(cStats)
+}
+
+// ContainerStatsToLibpodContainerStats converts the varlink containerstats to a libpod
+// container stats
+func ContainerStatsToLibpodContainerStats(stats iopodman.ContainerStats) libpod.ContainerStats {
+	cstats := libpod.ContainerStats{
+		ContainerID: stats.Id,
+		Name:        stats.Name,
+		CPU:         stats.Cpu,
+		CPUNano:     uint64(stats.Cpu_nano),
+		SystemNano:  uint64(stats.System_nano),
+		MemUsage:    uint64(stats.Mem_usage),
+		MemLimit:    uint64(stats.Mem_limit),
+		MemPerc:     stats.Mem_perc,
+		NetInput:    uint64(stats.Net_input),
+		NetOutput:   uint64(stats.Net_output),
+		BlockInput:  uint64(stats.Block_input),
+		BlockOutput: uint64(stats.Block_output),
+		PIDs:        uint64(stats.Pids),
+	}
+	return cstats
+}
diff --git a/pkg/varlinkapi/pods.go b/pkg/varlinkapi/pods.go
index 4ca4c4270..c79cee4c2 100644
--- a/pkg/varlinkapi/pods.go
+++ b/pkg/varlinkapi/pods.go
@@ -2,6 +2,7 @@ package varlinkapi
 
 import (
 	"encoding/json"
+	"fmt"
 	"github.com/containers/libpod/pkg/adapter/shortcuts"
 	"github.com/containers/libpod/pkg/rootless"
 	"syscall"
@@ -299,3 +300,33 @@ func (i *LibpodAPI) PodStateData(call iopodman.VarlinkCall, name string) error {
 	}
 	return call.ReplyPodStateData(string(b))
 }
+
+// TopPod provides the top stats for a given or latest pod
+func (i *LibpodAPI) TopPod(call iopodman.VarlinkCall, name string, latest bool, descriptors []string) error {
+	var (
+		pod *libpod.Pod
+		err error
+	)
+	if latest {
+		name = "latest"
+		pod, err = i.Runtime.GetLatestPod()
+	} else {
+		pod, err = i.Runtime.LookupPod(name)
+	}
+	if err != nil {
+		return call.ReplyPodNotFound(name, err.Error())
+	}
+
+	podStatus, err := shared.GetPodStatus(pod)
+	if err != nil {
+		return call.ReplyErrorOccurred(fmt.Sprintf("unable to get status for pod %s", pod.ID()))
+	}
+	if podStatus != "Running" {
+		return call.ReplyErrorOccurred("pod top can only be used on pods with at least one running container")
+	}
+	reply, err := pod.GetPodPidInformation(descriptors)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	return call.ReplyTopPod(reply)
+}