add metrics for zone failover mgr

common/metrics/defs.go

@@ -119,10 +119,13 @@ var GoRuntimeMetrics = map[MetricName]MetricType{
 
 // Scope enum
 const (
+	// -- Operation scopes for ZoneFailoverManager (common) --
+	ZoneFailoverMgrScope = iota
+
 	// -- Operation scopes for Metadata (common) --
 
 	// MetadataListEntityOpsScope defines scope for an operation on metadata
-	MetadataListEntityOpsScope = iota
+	MetadataListEntityOpsScope
 	// MetadataHostAddrToUUIDScope defines scope for an operation on metadata
 	MetadataHostAddrToUUIDScope
 	// MetadataListAllConsumerGroupsScope defines scope for an operation on metadata
@@ -458,6 +461,8 @@ var scopeDefs = map[ServiceIdx]map[int]scopeDefinition{
 
 	// Common operation tag values (shared by all services)
 	Common: {
+		ZoneFailoverMgrScope: {operation: "ZoneFailoverMgr"},
+
 		// Metadata operation tag values as seen by the Metrics backend
 		MetadataListEntityOpsScope:                     {operation: "MetadataListEntityOps"},
 		MetadataHostAddrToUUIDScope:                    {operation: "MetadataHostAddrToUUID"},
@@ -661,6 +666,15 @@ const (
 
 	// -- Common metrics -- //
 
+	// ZoneFailoverMgrRunSuccess indicates a success run
+	ZoneFailoverMgrRunSuccess = iota
+	// ZoneFailoverMgrRunFailToDetectActiveZone indicates failure to detect active zone
+	ZoneFailoverMgrRunFailToDetectActiveZone
+	// ZoneFailoverMgrRunFailToWriteMetadata indicates failure to write metadata
+	ZoneFailoverMgrRunFailToWriteMetadata
+	// ZoneFailoverMgrRunFailToWriteMetadata indicates a failed run
+	ZoneFailoverMgrRunFailure
+
 	// MetadataRequests is the count of requests to metadata
 	MetadataRequests = iota
 	// MetadataFailures is the count of requests to metadata that have failed
@@ -1079,9 +1093,13 @@ var metricDefs = map[ServiceIdx]map[int]metricDefinition{
 
 	// definition for Common metrics (for all services)
 	Common: {
-		MetadataRequests: {Counter, "metadata.requests"},
-		MetadataFailures: {Counter, "metadata.failures"},
-		MetadataLatency:  {Timer, "metadata.latency"},
+		ZoneFailoverMgrRunSuccess:                {Gauge, "ZoneFailoverMgr.run-success"},
+		ZoneFailoverMgrRunFailToDetectActiveZone: {Gauge, "ZoneFailoverMgr.run-fail-detect-active-zone"},
+		ZoneFailoverMgrRunFailToWriteMetadata:    {Gauge, "ZoneFailoverMgr.run-fail-write-metadata"},
+		ZoneFailoverMgrRunFailure:                {Gauge, "ZoneFailoverMgr.run-failure"},
+		MetadataRequests:                         {Counter, "metadata.requests"},
+		MetadataFailures:                         {Counter, "metadata.failures"},
+		MetadataLatency:                          {Timer, "metadata.latency"},
 	},
 
 	// definitions for Inputhost metrics