Move cgroups prom to containerd metrics

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

metrics/cgroups/cpu.go

@@ -0,0 +1,128 @@
+package cgroups
+
+import (
+	"strconv"
+
+	"github.com/containerd/cgroups"
+	metrics "github.com/docker/go-metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var cpuMetrics = []*metric{
+	{
+		name: "cpu_total",
+		help: "The total cpu time",
+		unit: metrics.Nanoseconds,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Usage.Total),
+				},
+			}
+		},
+	},
+	{
+		name: "cpu_kernel",
+		help: "The total kernel cpu time",
+		unit: metrics.Nanoseconds,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Usage.Kernel),
+				},
+			}
+		},
+	},
+	{
+		name: "cpu_user",
+		help: "The total user cpu time",
+		unit: metrics.Nanoseconds,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Usage.User),
+				},
+			}
+		},
+	},
+	{
+		name:   "per_cpu",
+		help:   "The total cpu time per cpu",
+		unit:   metrics.Nanoseconds,
+		vt:     prometheus.GaugeValue,
+		labels: []string{"cpu"},
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			var out []value
+			for i, v := range stats.Cpu.Usage.PerCpu {
+				out = append(out, value{
+					v: float64(v),
+					l: []string{strconv.Itoa(i)},
+				})
+			}
+			return out
+		},
+	},
+	{
+		name: "cpu_throttle_periods",
+		help: "The total cpu throttle periods",
+		unit: metrics.Total,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Throttling.Periods),
+				},
+			}
+		},
+	},
+	{
+		name: "cpu_throttled_periods",
+		help: "The total cpu throttled periods",
+		unit: metrics.Total,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Throttling.ThrottledPeriods),
+				},
+			}
+		},
+	},
+	{
+		name: "cpu_throttled_time",
+		help: "The total cpu throttled time",
+		unit: metrics.Nanoseconds,
+		vt:   prometheus.GaugeValue,
+		getValues: func(stats *cgroups.Stats) []value {
+			if stats.Cpu == nil {
+				return nil
+			}
+			return []value{
+				{
+					v: float64(stats.Cpu.Throttling.ThrottledTime),
+				},
+			}
+		},
+	},
+}