Fix rds metricset cpu.total.pct (#28456)

(cherry picked from commit a98cacd)

CHANGELOG.next.asciidoc

@@ -270,7 +270,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Change vsphere.datastore.capacity.used.pct value to betweeen 0 and 1. {pull}23148[23148]
 - `beat` module respects `basepath` config option. {pull}28162[28162]
 - Fix list_docker.go {pull}28374[28374]
-
+- Divide RDS metric cpu.total.pct by 100. {pull}28456[28456]
 *Packetbeat*
 
 - Handle truncated DNS records more gracefully. {issue}21495[21495] {pull}28297[28297]

x-pack/metricbeat/module/aws/cloudwatch/metadata/rds/rds.go

@@ -16,21 +16,10 @@ import (
 	"github.com/elastic/beats/v7/libbeat/logp"
 	"github.com/elastic/beats/v7/metricbeat/mb"
 	awscommon "github.com/elastic/beats/v7/x-pack/libbeat/common/aws"
-	"github.com/elastic/beats/v7/x-pack/metricbeat/module/aws"
 )
 
 const metadataPrefix = "aws.rds.db_instance."
 
-// DBDetails holds detailed information from DescribeDBInstances for each rds.
-type DBDetails struct {
-	dbArn              string
-	dbClass            string
-	dbAvailabilityZone string
-	dbIdentifier       string
-	dbStatus           string
-	tags               []aws.Tag
-}
-
 // AddMetadata adds metadata for RDS instances from a specific region
 func AddMetadata(endpoint string, regionName string, awsConfig awssdk.Config, events map[string]mb.Event) map[string]mb.Event {
 	svc := rds.New(awscommon.EnrichAWSConfigWithEndpoint(
@@ -43,17 +32,47 @@ func AddMetadata(endpoint string, regionName string, awsConfig awssdk.Config, ev
 		return events
 	}
 
+	for _, event := range events {
+		cpuValue, err := event.RootFields.GetValue("aws.rds.metrics.CPUUtilization.avg")
+		if err == nil {
+			if value, ok := cpuValue.(float64); ok {
+				event.RootFields.Put("aws.rds.metrics.CPUUtilization.avg", value/100)
+			}
+		}
+	}
+
 	for identifier, output := range dbDetailsMap {
 		if _, ok := events[identifier]; !ok {
 			continue
 		}
-		events[identifier].RootFields.Put(metadataPrefix+"arn", &output.DBInstanceArn)
-		events[identifier].RootFields.Put(metadataPrefix+"status", &output.DBInstanceStatus)
-		events[identifier].RootFields.Put(metadataPrefix+"identifier", &output.DBInstanceIdentifier)
-		events[identifier].RootFields.Put(metadataPrefix+"db_cluster_identifier", &output.DBClusterIdentifier)
-		events[identifier].RootFields.Put(metadataPrefix+"class", &output.DBInstanceClass)
-		events[identifier].RootFields.Put(metadataPrefix+"engine_name", &output.Engine)
-		events[identifier].RootFields.Put("cloud.availability_zone", &output.AvailabilityZone)
+
+		if output.DBInstanceArn != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"arn", *output.DBInstanceArn)
+		}
+
+		if output.DBInstanceStatus != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"status", *output.DBInstanceStatus)
+		}
+
+		if output.DBInstanceIdentifier != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"identifier", *output.DBInstanceIdentifier)
+		}
+
+		if output.DBClusterIdentifier != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"db_cluster_identifier", *output.DBClusterIdentifier)
+		}
+
+		if output.DBInstanceClass != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"class", *output.DBInstanceClass)
+		}
+
+		if output.Engine != nil {
+			events[identifier].RootFields.Put(metadataPrefix+"engine_name", *output.Engine)
+		}
+
+		if output.AvailabilityZone != nil {
+			events[identifier].RootFields.Put("cloud.availability_zone", *output.AvailabilityZone)
+		}
 	}
 	return events
 }

x-pack/metricbeat/module/aws/rds/_meta/data.json

@@ -5,17 +5,19 @@
             "namespace": "AWS/RDS"
         },
         "dimensions": {
-            "DBClusterIdentifier": "database-1",
-            "Role": "WRITER"
+            "DatabaseClass": "db.r5.large"
         },
         "rds": {
             "aurora_bin_log_replica_lag": 0,
             "aurora_replica": {
+                "lag": {
+                    "ms": 19.9485
+                },
                 "lag_max": {
-                    "ms": 13.449000358581543
+                    "ms": 21.318500518798828
                 },
                 "lag_min": {
-                    "ms": 13.449000358581543
+                    "ms": 21.318500518798828
                 }
             },
             "aurora_volume_left_total": {
@@ -27,54 +29,49 @@
             },
             "cpu": {
                 "total": {
-                    "pct": 6.975116251937533
+                    "pct": 0.06552109062928828
                 }
             },
             "database_connections": 0,
             "deadlocks": 0,
             "engine_uptime": {
-                "sec": 20413803
+                "sec": 33121208
             },
             "free_local_storage": {
-                "bytes": 25608523776
+                "bytes": 27275925504
             },
             "freeable_memory": {
-                "bytes": 4695093248
+                "bytes": 4604928000
             },
             "latency": {
-                "commit": 5.198533333333333,
+                "commit": 3.2349916666666667,
                 "ddl": 0,
                 "delete": 0,
-                "dml": 0.19726666666666667,
-                "insert": 0.19726666666666667,
+                "dml": 0.09888333333333334,
+                "insert": 0.09888333333333334,
                 "read": 0,
-                "select": 0.21317204301075268,
+                "select": 0.2432811228126595,
                 "update": 0,
-                "write": 0.0013534145331858408
+                "write": 0.0005787267919438727
             },
             "login_failures": 0,
-            "queries": 8.830095631601747,
+            "queries": 7.862475898034027,
             "throughput": {
-                "commit": 0.49980840677740196,
+                "commit": 0.24950762724254,
                 "ddl": 0,
                 "delete": 0,
-                "dml": 0.49980840677740196,
-                "insert": 0.49980840677740196,
-                "network": 1.3998600139986002,
-                "network_receive": 0.6999300069993001,
-                "network_transmit": 0.6999300069993001,
-                "select": 3.098812122019892,
+                "dml": 0.24950762724254,
+                "insert": 0.24950762724254,
+                "network": 1.3985171580449323,
+                "network_receive": 0.6992585790224661,
+                "network_transmit": 0.6992585790224661,
+                "select": 2.9299395125804084,
                 "update": 0
             },
             "transactions": {
                 "active": 0,
                 "blocked": 0
             }
-        },
-        "tags": {
-            "cluster": "database-1",
-            "created-by": "ks",
-            "dept": "eng"
         }
     },
     "cloud": {
@@ -83,7 +80,7 @@
             "name": "elastic-beats"
         },
         "provider": "aws",
-        "region": "us-east-1"
+        "region": "eu-west-1"
     },
     "event": {
         "dataset": "aws.rds",