Add GetPodStats to varlink

Signed-off-by: haircommander <pehunt@redhat.com>

Closes: #1319
Approved by: baude

2 files changed, 61 insertions, 2 deletions

diff --git a/cmd/podman/varlink/io.podman.varlink b/cmd/podman/varlink/io.podman.varlink
index 3d4a8fa84..2fc53b43e 100644
--- a/cmd/podman/varlink/io.podman.varlink
+++ b/cmd/podman/varlink/io.podman.varlink
@@ -757,8 +757,34 @@ method WaitPod() -> (notimplemented: NotImplemented)
 # This method has not been implemented yet.
 method TopPod() -> (notimplemented: NotImplemented)
 
-# This method has not been implemented yet.
-method StatsPod() -> (notimplemented: NotImplemented)
+# GetPodStats takes the name or ID of a pod and returns a pod name and slice of ContainerStats structure which
+# contains attributes like memory and cpu usage.  If the pod cannot be found, a [PodNotFound](#PodNotFound)
+# error will be returned.
+# #### Example
+# ~~~
+# $ varlink call unix:/run/podman/io.podman/io.podman.GetPodStats '{"name": "7f62b508b6f12b11d8fe02e"}'
+# {
+#   "containers": [
+#     {
+#       "block_input": 0,
+#       "block_output": 0,
+#       "cpu": 2.833470544016107524276e-08,
+#       "cpu_nano": 54363072,
+#       "id": "a64b51f805121fe2c5a3dc5112eb61d6ed139e3d1c99110360d08b58d48e4a93",
+#       "mem_limit": 12276146176,
+#       "mem_perc": 7.974359265237864966003e-03,
+#       "mem_usage": 978944,
+#       "name": "quirky_heisenberg",
+#       "net_input": 866,
+#       "net_output": 7388,
+#       "pids": 1,
+#       "system_nano": 20000000
+#     }
+#   ],
+#   "pod": "7f62b508b6f12b11d8fe02e0db4de6b9e43a7d7699b33a4fc0d574f6e82b4ebd"
+# }
+# ~~~
+method GetPodStats(name: string) -> (pod: string, containers: []ContainerStats)
 
 # ImageNotFound means the image could not be found by the provided name or ID in local storage.
 error ImageNotFound (name: string)
diff --git a/pkg/varlinkapi/pods.go b/pkg/varlinkapi/pods.go
index 640dd665e..75733db11 100644
--- a/pkg/varlinkapi/pods.go
+++ b/pkg/varlinkapi/pods.go
@@ -187,3 +187,36 @@ func (i *LibpodAPI) RemovePod(call iopodman.VarlinkCall, name string, force bool
 
 	return call.ReplyRemovePod(pod.ID())
 }
+
+// GetPodStats ...
+func (i *LibpodAPI) GetPodStats(call iopodman.VarlinkCall, name string) error {
+	pod, err := i.Runtime.LookupPod(name)
+	if err != nil {
+		return call.ReplyPodNotFound(name)
+	}
+	prevStats := make(map[string]*libpod.ContainerStats)
+	podStats, err := pod.GetPodStats(prevStats)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	containersStats := make([]iopodman.ContainerStats, 0)
+	for ctrID, containerStats := range podStats {
+		cs := iopodman.ContainerStats{
+			Id:           ctrID,
+			Name:         containerStats.Name,
+			Cpu:          containerStats.CPU,
+			Cpu_nano:     int64(containerStats.CPUNano),
+			System_nano:  int64(containerStats.SystemNano),
+			Mem_usage:    int64(containerStats.MemUsage),
+			Mem_limit:    int64(containerStats.MemLimit),
+			Mem_perc:     containerStats.MemPerc,
+			Net_input:    int64(containerStats.NetInput),
+			Net_output:   int64(containerStats.NetOutput),
+			Block_input:  int64(containerStats.BlockInput),
+			Block_output: int64(containerStats.BlockOutput),
+			Pids:         int64(containerStats.PIDs),
+		}
+		containersStats = append(containersStats, cs)
+	}
+	return call.ReplyGetPodStats(pod.ID(), containersStats)
+}