metrics: starts some counters at zero

without starting the counter as zero Grafana will not send any metrics
to graphite using the bridge.

pkg/metrics/metrics.go

@@ -61,6 +61,23 @@ var (
 	M_Grafana_Version        *prometheus.GaugeVec
 )
 
+func newCounterVecStartingAtZero(opts prometheus.CounterOpts, labels []string, labelValues ...string) *prometheus.CounterVec {
+	counter := prometheus.NewCounterVec(opts, labels)
+
+	for _, label := range labelValues {
+		counter.WithLabelValues(label).Add(0)
+	}
+
+	return counter
+}
+
+func newCounterStartingAtZero(opts prometheus.CounterOpts, labelValues ...string) prometheus.Counter {
+	counter := prometheus.NewCounter(opts)
+	counter.Add(0)
+
+	return counter
+}
+
 func init() {
 	M_Instance_Start = prometheus.NewCounter(prometheus.CounterOpts{
 		Name:      "instance_start_total",
@@ -68,32 +85,27 @@ func init() {
 		Namespace: exporterName,
 	})
 
-	M_Page_Status = prometheus.NewCounterVec(
+	httpStatusCodes := []string{"200", "404", "500", "unknown"}
+	M_Page_Status = newCounterVecStartingAtZero(
 		prometheus.CounterOpts{
 			Name:      "page_response_status_total",
 			Help:      "page http response status",
 			Namespace: exporterName,
-		},
-		[]string{"code"},
-	)
+		}, []string{"code"}, httpStatusCodes...)
 
-	M_Api_Status = prometheus.NewCounterVec(
+	M_Api_Status = newCounterVecStartingAtZero(
 		prometheus.CounterOpts{
 			Name:      "api_response_status_total",
 			Help:      "api http response status",
 			Namespace: exporterName,
-		},
-		[]string{"code"},
-	)
+		}, []string{"code"}, httpStatusCodes...)
 
-	M_Proxy_Status = prometheus.NewCounterVec(
+	M_Proxy_Status = newCounterVecStartingAtZero(
 		prometheus.CounterOpts{
 			Name:      "proxy_response_status_total",
 			Help:      "proxy http response status",
 			Namespace: exporterName,
-		},
-		[]string{"code"},
-	)
+		}, []string{"code"}, httpStatusCodes...)
 
 	M_Http_Request_Total = prometheus.NewCounterVec(
 		prometheus.CounterOpts{
@@ -111,19 +123,19 @@ func init() {
 		[]string{"handler", "statuscode", "method"},
 	)
 
-	M_Api_User_SignUpStarted = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_User_SignUpStarted = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_user_signup_started_total",
 		Help:      "amount of users who started the signup flow",
 		Namespace: exporterName,
 	})
 
-	M_Api_User_SignUpCompleted = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_User_SignUpCompleted = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_user_signup_completed_total",
 		Help:      "amount of users who completed the signup flow",
 		Namespace: exporterName,
 	})
 
-	M_Api_User_SignUpInvite = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_User_SignUpInvite = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_user_signup_invite_total",
 		Help:      "amount of users who have been invited",
 		Namespace: exporterName,
@@ -147,49 +159,49 @@ func init() {
 		Namespace: exporterName,
 	})
 
-	M_Api_Admin_User_Create = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Admin_User_Create = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_admin_user_created_total",
 		Help:      "api admin user created counter",
 		Namespace: exporterName,
 	})
 
-	M_Api_Login_Post = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Login_Post = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_login_post_total",
 		Help:      "api login post counter",
 		Namespace: exporterName,
 	})
 
-	M_Api_Login_OAuth = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Login_OAuth = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_login_oauth_total",
 		Help:      "api login oauth counter",
 		Namespace: exporterName,
 	})
 
-	M_Api_Org_Create = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Org_Create = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_org_create_total",
 		Help:      "api org created counter",
 		Namespace: exporterName,
 	})
 
-	M_Api_Dashboard_Snapshot_Create = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Dashboard_Snapshot_Create = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_dashboard_snapshot_create_total",
 		Help:      "dashboard snapshots created",
 		Namespace: exporterName,
 	})
 
-	M_Api_Dashboard_Snapshot_External = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Dashboard_Snapshot_External = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_dashboard_snapshot_external_total",
 		Help:      "external dashboard snapshots created",
 		Namespace: exporterName,
 	})
 
-	M_Api_Dashboard_Snapshot_Get = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Dashboard_Snapshot_Get = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_dashboard_snapshot_get_total",
 		Help:      "loaded dashboards",
 		Namespace: exporterName,
 	})
 
-	M_Api_Dashboard_Insert = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Api_Dashboard_Insert = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "api_models_dashboard_insert_total",
 		Help:      "dashboards inserted ",
 		Namespace: exporterName,
@@ -207,25 +219,25 @@ func init() {
 		Namespace: exporterName,
 	}, []string{"type"})
 
-	M_Aws_CloudWatch_GetMetricStatistics = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Aws_CloudWatch_GetMetricStatistics = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "aws_cloudwatch_get_metric_statistics_total",
 		Help:      "counter for getting metric statistics from aws",
 		Namespace: exporterName,
 	})
 
-	M_Aws_CloudWatch_ListMetrics = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Aws_CloudWatch_ListMetrics = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "aws_cloudwatch_list_metrics_total",
 		Help:      "counter for getting list of metrics from aws",
 		Namespace: exporterName,
 	})
 
-	M_Aws_CloudWatch_GetMetricData = prometheus.NewCounter(prometheus.CounterOpts{
+	M_Aws_CloudWatch_GetMetricData = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "aws_cloudwatch_get_metric_data_total",
 		Help:      "counter for getting metric data time series from aws",
 		Namespace: exporterName,
 	})
 
-	M_DB_DataSource_QueryById = prometheus.NewCounter(prometheus.CounterOpts{
+	M_DB_DataSource_QueryById = newCounterStartingAtZero(prometheus.CounterOpts{
 		Name:      "db_datasource_query_by_id_total",
 		Help:      "counter for getting datasource by id",
 		Namespace: exporterName,