add cgroup quota and period support / add missing tests

container/raw/handler.go

@@ -207,6 +207,16 @@ func (self *rawContainerHandler) GetSpec() (info.ContainerSpec, error) {
 		if utils.FileExists(cpuRoot) {
 			spec.HasCpu = true
 			spec.Cpu.Limit = readUInt64(cpuRoot, "cpu.shares")
+			spec.Cpu.Period = readUInt64(cpuRoot, "cpu.cfs_period_us")
+			quota := readString(cpuRoot, "cpu.cfs_quota_us")
+
+			if quota != "-1" {
+				val, err := strconv.ParseUint(quota, 10, 64)
+				if err != nil {
+					glog.Errorf("raw driver: Failed to parse CPUQuota from %q: %s", path.Join(cpuRoot, "cpu.cfs_quota_us"), err)
+				}
+				spec.Cpu.Quota = val
+			}
 		}
 	}
 

info/v1/container.go

@@ -23,6 +23,8 @@ type CpuSpec struct {
 	Limit    uint64 `json:"limit"`
 	MaxLimit uint64 `json:"max_limit"`
 	Mask     string `json:"mask,omitempty"`
+	Quota    uint64 `json:"quota,omitempty"`
+	Period   uint64 `json:"period,omitempty"`
 }
 
 type MemorySpec struct {

info/v2/container.go

@@ -36,6 +36,10 @@ type CpuSpec struct {
 	// Cpu affinity mask.
 	// TODO(rjnagal): Add a library to convert mask string to set of cpu bitmask.
 	Mask string `json:"mask,omitempty"`
+	// CPUQuota Default is disabled
+	Quota uint64 `json:"quota,omitempty"`
+	// Period is the CPU reference time in ns e.g the quota is compared aginst this.
+	Period uint64 `json:"period,omitempty"`
 }
 
 type MemorySpec struct {

metrics/prometheus.go

@@ -542,10 +542,16 @@ func (c *PrometheusCollector) collectContainersInfo(ch chan<- prometheus.Metric)
 		ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, float64(container.Spec.CreationTime.Unix()), baseLabelValues...)
 
 		if container.Spec.HasCpu {
+			desc = prometheus.NewDesc("container_spec_cpu_period", "CPU period of the container.", baseLabels, nil)
+			ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, float64(container.Spec.Cpu.Period), baseLabelValues...)
+			if container.Spec.Cpu.Quota != 0 {
+				desc = prometheus.NewDesc("container_spec_cpu_quota", "CPU quota of the container.", baseLabels, nil)
+				ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, float64(container.Spec.Cpu.Quota), baseLabelValues...)
+			}
 			desc := prometheus.NewDesc("container_spec_cpu_shares", "CPU share of the container.", baseLabels, nil)
 			ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, float64(container.Spec.Cpu.Limit), baseLabelValues...)
-		}
 
+		}
 		if container.Spec.HasMemory {
 			desc := prometheus.NewDesc("container_spec_memory_limit_bytes", "Memory limit for the container.", baseLabels, nil)
 			ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, specMemoryValue(container.Spec.Memory.Limit), baseLabelValues...)

metrics/prometheus_test.go

@@ -55,7 +55,13 @@ func (p testSubcontainersInfoProvider) SubcontainersInfo(string, *info.Container
 				Aliases: []string{"testcontaineralias"},
 			},
 			Spec: info.ContainerSpec{
-				Image:        "test",
+				Image:  "test",
+				HasCpu: true,
+				Cpu: info.CpuSpec{
+					Limit:  1000,
+					Period: 10,
+					Quota:  10000,
+				},
 				CreationTime: time.Unix(1257894000, 0),
 				Labels: map[string]string{
 					"foo.label": "bar",

metrics/testdata/prometheus_metrics

@@ -116,6 +116,15 @@ container_network_transmit_packets_total{foo_env="prod",foo_label="bar",id="test
 # HELP container_scrape_error 1 if there was an error while getting container metrics, 0 otherwise
 # TYPE container_scrape_error gauge
 container_scrape_error 0
+# HELP container_spec_cpu_period CPU period of the container.
+# TYPE container_spec_cpu_period gauge
+container_spec_cpu_period{foo_env="prod",foo_label="bar",id="testcontainer",image="test",name="testcontaineralias",zone_name="hello"} 10
+# HELP container_spec_cpu_quota CPU quota of the container.
+# TYPE container_spec_cpu_quota gauge
+container_spec_cpu_quota{foo_env="prod",foo_label="bar",id="testcontainer",image="test",name="testcontaineralias",zone_name="hello"} 10000
+# HELP container_spec_cpu_shares CPU share of the container.
+# TYPE container_spec_cpu_shares gauge
+container_spec_cpu_shares{foo_env="prod",foo_label="bar",id="testcontainer",image="test",name="testcontaineralias",zone_name="hello"} 1000
 # HELP container_start_time_seconds Start time of the container since unix epoch in seconds.
 # TYPE container_start_time_seconds gauge
 container_start_time_seconds{foo_env="prod",foo_label="bar",id="testcontainer",image="test",name="testcontaineralias",zone_name="hello"} 1.257894e+09
@@ -173,4 +182,4 @@ process_resident_memory_bytes 7.74144e+06
 process_start_time_seconds 1.42620369439e+09
 # HELP process_virtual_memory_bytes Virtual memory size in bytes.
 # TYPE process_virtual_memory_bytes gauge
-process_virtual_memory_bytes 1.16420608e+08
+process_virtual_memory_bytes 1.16420608e+08