[Metricbeat] Google Cloud: Do not try to setup region filter on Cloud…

…functions metrics (#24218) (#24232)

(cherry picked from commit a6a3d6d)

CHANGELOG.next.asciidoc

@@ -324,6 +324,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix ec2 metricset fields.yml and the integration test {pull}23726[23726]
 - Unskip s3_request integration test. {pull}23887[23887]
 - Add system.hostfs configuration option for system module. {pull}23831[23831]
+- Fix GCP not able to request Cloudfunctions metrics if a region filter was set {pull}24218[24218]
 
 *Packetbeat*
 

x-pack/metricbeat/module/gcp/constants.go

@@ -16,11 +16,11 @@ const (
 
 // Metricsets / GCP services names
 const (
-	ServiceCompute       = "compute"
-	ServicePubsub        = "pubsub"
-	ServiceLoadBalancing = "loadbalancing"
-	ServiceFirestore     = "firestore"
-	ServiceStorage       = "storage"
+	ServiceCloudFunctions = "cloudfunctions"
+	ServiceCompute        = "compute"
+	ServiceLoadBalancing  = "loadbalancing"
+	ServicePubsub         = "pubsub"
+	ServiceStorage        = "storage"
 )
 
 //Paths within the GCP monitoring.TimeSeries response, if converted to JSON, where you can find each ECS field required for the output event

x-pack/metricbeat/module/gcp/metrics/metrics_requester.go

@@ -83,7 +83,7 @@ func (r *metricsRequester) Metrics(ctx context.Context, sdc metricsConfig, metri
 		go func(mt string) {
 			defer wg.Done()
 
-			r.logger.Debugf("For metricType %s, metricMeta = %s", mt, metricMeta)
+			r.logger.Debugf("For metricType %s, metricMeta = %d", mt, metricMeta)
 			interval, aligner := getTimeIntervalAligner(metricMeta.ingestDelay, metricMeta.samplePeriod, r.config.period, aligner)
 			ts := r.Metric(ctx, mt, interval, aligner)
 			lock.Lock()
@@ -109,7 +109,7 @@ func (r *metricsRequester) getFilterForMetric(m string) (f string) {
 	service := serviceRegexp.ReplaceAllString(m, "${service}")
 
 	switch service {
-	case gcp.ServicePubsub, gcp.ServiceLoadBalancing:
+	case gcp.ServicePubsub, gcp.ServiceLoadBalancing, gcp.ServiceCloudFunctions:
 		return
 	case gcp.ServiceStorage:
 		if r.config.Region == "" {