(cloudwatch) add api gateway metrics/dimensions

pkg/api/cloudwatch/metrics.go

@@ -28,6 +28,7 @@ var customMetricsDimensionsMap map[string]map[string]map[string]*CustomMetricsCa
 
 func init() {
 	metricsMap = map[string][]string{
+		"AWS/ApiGateway":     {"4XXError", "5XXError", "CacheHitCount", "CacheMissCount", "Count", "IntegrationLatency", "Latency"},
 		"AWS/ApplicationELB": {"ActiveConnectionCount", "ClientTLSNegotiationErrorCount", "HealthyHostCount", "HTTPCode_ELB_4XX_Count", "HTTPCode_ELB_5XX_Count", "HTTPCode_Target_2XX_Count", "HTTPCode_Target_3XX_Count", "HTTPCode_Target_4XX_Count", "HTTPCode_Target_5XX_Count", "NewConnectionCount", "ProcessedBytes", "RejectedConnectionCount", "RequestCount", "TargetConnectionErrorCount", "TargetResponseTime", "TargetTLSNegotiationErrorCount", "UnhealthyHostCount"},
 		"AWS/AutoScaling":    {"GroupMinSize", "GroupMaxSize", "GroupDesiredCapacity", "GroupInServiceInstances", "GroupPendingInstances", "GroupStandbyInstances", "GroupTerminatingInstances", "GroupTotalInstances"},
 		"AWS/Billing":        {"EstimatedCharges"},
@@ -87,6 +88,7 @@ func init() {
 		"AWS/WorkSpaces": {"Available", "Unhealthy", "ConnectionAttempt", "ConnectionSuccess", "ConnectionFailure", "SessionLaunchTime", "InSessionLatency", "SessionDisconnect"},
 	}
 	dimensionsMap = map[string][]string{
+		"AWS/ApiGateway":       {"ApiName", "Method", "Resource", "Stage"},
 		"AWS/ApplicationELB":   {"LoadBalancer", "TargetGroup", "AvailabilityZone"},
 		"AWS/AutoScaling":      {"AutoScalingGroupName"},
 		"AWS/Billing":          {"ServiceName", "LinkedAccount", "Currency"},