API changes for custom metrics

api/versions.go

@@ -39,6 +39,7 @@ const (
 	attributesApi    = "attributes"
 	versionApi       = "version"
 	psApi            = "ps"
+	customMetricsApi = "appmetrics"
 )
 
 // Interface for a cAdvisor API version
@@ -305,7 +306,7 @@ func (self *version2_0) Version() string {
 }
 
 func (self *version2_0) SupportedRequestTypes() []string {
-	return []string{versionApi, attributesApi, eventsApi, machineApi, summaryApi, statsApi, specApi, storageApi, psApi}
+	return []string{versionApi, attributesApi, eventsApi, machineApi, summaryApi, statsApi, specApi, storageApi, psApi, customMetricsApi}
 }
 
 func (self *version2_0) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
@@ -364,6 +365,24 @@ func (self *version2_0) HandleRequest(requestType string, request []string, m ma
 			contStats[name] = convertStats(cont)
 		}
 		return writeResult(contStats, w)
+	case customMetricsApi:
+		containerName := getContainerName(request)
+		glog.V(4).Infof("Api - Custom Metrics: Looking for metrics for container %q, options %+v", containerName, opt)
+		conts, err := m.GetRequestedContainersInfo(containerName, opt)
+		if err != nil {
+			return err
+		}
+		contMetrics := make(map[string][][]info.Metric, 0)
+		metrics := [][]info.Metric{}
+		for _, cont := range conts {
+			contStats := convertStats(cont)
+			for _, contStat := range contStats {
+				metric := contStat.CustomMetrics
+				metrics = append(metrics, metric)
+			}
+			contMetrics[containerName] = metrics
+		}
+		return writeResult(contMetrics, w)
 	case specApi:
 		containerName := getContainerName(request)
 		glog.V(4).Infof("Api - Spec for container %q, options %+v", containerName, opt)
@@ -412,12 +431,13 @@ func convertStats(cont *info.ContainerInfo) []v2.ContainerStats {
 	stats := []v2.ContainerStats{}
 	for _, val := range cont.Stats {
 		stat := v2.ContainerStats{
-			Timestamp:     val.Timestamp,
-			HasCpu:        cont.Spec.HasCpu,
-			HasMemory:     cont.Spec.HasMemory,
-			HasNetwork:    cont.Spec.HasNetwork,
-			HasFilesystem: cont.Spec.HasFilesystem,
-			HasDiskIo:     cont.Spec.HasDiskIo,
+			Timestamp:        val.Timestamp,
+			HasCpu:           cont.Spec.HasCpu,
+			HasMemory:        cont.Spec.HasMemory,
+			HasNetwork:       cont.Spec.HasNetwork,
+			HasFilesystem:    cont.Spec.HasFilesystem,
+			HasDiskIo:        cont.Spec.HasDiskIo,
+			HasCustomMetrics: cont.Spec.HasCustomMetrics,
 		}
 		if stat.HasCpu {
 			stat.Cpu = val.Cpu
@@ -434,6 +454,9 @@ func convertStats(cont *info.ContainerInfo) []v2.ContainerStats {
 		if stat.HasDiskIo {
 			stat.DiskIo = val.DiskIo
 		}
+		if stat.HasCustomMetrics {
+			stat.CustomMetrics = val.CustomMetrics
+		}
 		// TODO(rjnagal): Handle load stats.
 		stats = append(stats, stat)
 	}

info/v1/container.go

@@ -58,6 +58,8 @@ type ContainerSpec struct {
 
 	// HasDiskIo when true, indicates that DiskIo stats will be available.
 	HasDiskIo bool `json:"has_diskio"`
+
+	HasCustomMetrics bool `json:"has_custom_metrics"`
 }
 
 // Container reference contains enough information to uniquely identify a container
@@ -190,6 +192,9 @@ func (self *ContainerSpec) Eq(b *ContainerSpec) bool {
 	if self.HasDiskIo != b.HasDiskIo {
 		return false
 	}
+	if self.HasCustomMetrics != b.HasCustomMetrics {
+		return false
+	}
 	return true
 }
 

info/v2/container.go

@@ -73,6 +73,8 @@ type ContainerSpec struct {
 	HasMemory bool       `json:"has_memory"`
 	Memory    MemorySpec `json:"memory,omitempty"`
 
+	HasCustomMetrics bool `json:"has_custom_metrics"`
+
 	// Following resources have no associated spec, but are being isolated.
 	HasNetwork    bool `json:"has_network"`
 	HasFilesystem bool `json:"has_filesystem"`
@@ -100,6 +102,9 @@ type ContainerStats struct {
 	// Task load statistics
 	HasLoad bool         `json:"has_load"`
 	Load    v1.LoadStats `json:"load_stats,omitempty"`
+	//Custom statistics
+	HasCustomMetrics bool        `json:"has_custom_metrics"`
+	CustomMetrics    []v1.Metric `json:"custom_metrics,omitempty"`
 }
 
 type Percentiles struct {