[Metricbeat] Unable to get account id in China regions

[henrysher]

• Version: Metricbeat 7.7.0
• Operating System: Amazon Linux 2.0
• Discuss Forum URL: already confirmed the issue in Add endpoint into AWS config #16263 @kaiyan-sheng
• Steps to Reproduce: using AWS credentials in China regions to run metricbeat

The hardcoded region here "us-east-1" works well in global regions but not for China regions.

x-pack/metricbeat/module/aws/aws.go
@@ -86,7 +87,9 @@ func NewMetricSet(base mb.BaseMetricSet) (*MetricSet, error) {
	}

	// Get IAM account name
	svcIam := iam.New(awsConfig)
	awsConfig.Region = "us-east-1"

Furthermore, I have changed "us-east-1" to "cn-north-1" and re-compiled in both China regions: Beijing and Ningxia, it works well.

So, i would suggest to add a new variable to configure by users.

[elasticmachine]

Pinging @elastic/integrations-platforms (Team:Platforms)

[kwinstonix]

Is there any progress on this issue ？

A config param aws_partition could indicate the aws account type.

https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

The following are the supported partitions:

aws - AWS Regions

aws-cn - AWS China Regions

aws-us-gov - AWS GovCloud (US) Regions