ctr: add some metric item

Ace-Tang · Ace-Tang · commit 7ea75ef4a92e · 2018-10-16T16:54:06.000+08:00
add memory limit, pid info into metric subcommand, since moby also
show them. As blkio read/write IO need more calculation，not add them.

Signed-off-by: Ace-Tang &lt;aceapril@126.com&gt;
diff --git a/cmd/ctr/commands/tasks/metrics.go b/cmd/ctr/commands/tasks/metrics.go
@@ -90,9 +90,12 @@ var metricsCommand = cli.Command{
 
 			fmt.Fprintf(w, "METRIC\tVALUE\t\n")
 			fmt.Fprintf(w, "memory.usage_in_bytes\t%d\t\n", data.Memory.Usage.Usage)
+			fmt.Fprintf(w, "memory.limit_in_bytes\t%d\t\n", data.Memory.Usage.Limit)
 			fmt.Fprintf(w, "memory.stat.cache\t%d\t\n", data.Memory.TotalCache)
 			fmt.Fprintf(w, "cpuacct.usage\t%d\t\n", data.CPU.Usage.Total)
 			fmt.Fprintf(w, "cpuacct.usage_percpu\t%v\t\n", data.CPU.Usage.PerCPU)
+			fmt.Fprintf(w, "pids.current\t%v\t\n", data.Pids.Current)
+			fmt.Fprintf(w, "pids.limit\t%v\t\n", data.Pids.Limit)
 			return w.Flush()
 		case formatJSON:
 			marshaledJSON, err := json.MarshalIndent(data, "", "  ")
