AWS Elasticsearch service get NodeId (Instance ID)

Question

I provision AWS Elasticsearch service with Terraform and want to setup CloudWatch alarms for some metrics like CPU Usage etc. also by using Terraform.

In order to do it I have to put NodeId to aws_cloudwatch_metric_alarm resource:

The problem is that aws_elasticsearch_domain resource doesn't have suitable Attributes Reference

And I also haven't found anything suitable in aws es cli https://docs.aws.amazon.com/cli/latest/reference/es/index.html

Any ideas how to get this NodeId to use in Terraform?

Answer 1

You can get the nodeId from elasticsearch api instead of relying on aws sdk/cli.

Specifically, you can query the cat/nodes api.

Link for reference: https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-nodes.html