Metrics: Adds back missing summary quantiles (#21858)

Adds back missing summary quantiles which was mistakenly
removed in v6.6.0. 

Fixes #21857

pkg/infra/metrics/metrics.go

@@ -154,6 +154,8 @@ var (
 
 
 func init() {
 func init() {
 	httpStatusCodes := []string{"200", "404", "500", "unknown"}
 	httpStatusCodes := []string{"200", "404", "500", "unknown"}
+	objectiveMap := map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001}
+
 	MInstanceStart = prometheus.NewCounter(prometheus.CounterOpts{
 	MInstanceStart = prometheus.NewCounter(prometheus.CounterOpts{
 		Name:      "instance_start_total",
 		Name:      "instance_start_total",
 		Help:      "counter for started instances",
 		Help:      "counter for started instances",
@@ -193,6 +195,7 @@ func init() {
 		prometheus.SummaryOpts{
 		prometheus.SummaryOpts{
 			Name:       "http_request_duration_milliseconds",
 			Name:       "http_request_duration_milliseconds",
 			Help:       "http request summary",
 			Help:       "http request summary",
+			Objectives: objectiveMap,
 		},
 		},
 		[]string{"handler", "statuscode", "method"},
 		[]string{"handler", "statuscode", "method"},
 	)
 	)
@@ -218,18 +221,21 @@ func init() {
 	MApiDashboardSave = prometheus.NewSummary(prometheus.SummaryOpts{
 	MApiDashboardSave = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "api_dashboard_save_milliseconds",
 		Name:       "api_dashboard_save_milliseconds",
 		Help:       "summary for dashboard save duration",
 		Help:       "summary for dashboard save duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})
 
 
 	MApiDashboardGet = prometheus.NewSummary(prometheus.SummaryOpts{
 	MApiDashboardGet = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "api_dashboard_get_milliseconds",
 		Name:       "api_dashboard_get_milliseconds",
 		Help:       "summary for dashboard get duration",
 		Help:       "summary for dashboard get duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})
 
 
 	MApiDashboardSearch = prometheus.NewSummary(prometheus.SummaryOpts{
 	MApiDashboardSearch = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "api_dashboard_search_milliseconds",
 		Name:       "api_dashboard_search_milliseconds",
 		Help:       "summary for dashboard search duration",
 		Help:       "summary for dashboard search duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})
 
 
@@ -332,18 +338,21 @@ func init() {
 	LDAPUsersSyncExecutionTime = prometheus.NewSummary(prometheus.SummaryOpts{
 	LDAPUsersSyncExecutionTime = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "ldap_users_sync_execution_time",
 		Name:       "ldap_users_sync_execution_time",
 		Help:       "summary for LDAP users sync execution duration",
 		Help:       "summary for LDAP users sync execution duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})
 
 
 	MDataSourceProxyReqTimer = prometheus.NewSummary(prometheus.SummaryOpts{
 	MDataSourceProxyReqTimer = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "api_dataproxy_request_all_milliseconds",
 		Name:       "api_dataproxy_request_all_milliseconds",
 		Help:       "summary for dataproxy request duration",
 		Help:       "summary for dataproxy request duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})
 
 
 	MAlertingExecutionTime = prometheus.NewSummary(prometheus.SummaryOpts{
 	MAlertingExecutionTime = prometheus.NewSummary(prometheus.SummaryOpts{
 		Name:       "alerting_execution_time_milliseconds",
 		Name:       "alerting_execution_time_milliseconds",
 		Help:       "summary of alert exeuction duration",
 		Help:       "summary of alert exeuction duration",
+		Objectives: objectiveMap,
 		Namespace:  exporterName,
 		Namespace:  exporterName,
 	})
 	})