Is there a way to get cpu credit balance value inside the burstable ec2 instance instead of getting it from cloudwatch via Internet?

Question

I just checked IMDS and there is no such data. What I want to implement is to let the program running on a burstable ec2 moderate itself when it finds the CPU credit balance is not enough. the cloudwatch method is rather heavy and not so real time.

Thanks a lot :-)

Accepted Answer

You could create a private VPC endpoint for the CloudWatch Metrics service (the endpoint to choose is `com.amazonaws..monitoring`) and that way your instance can access the service without having to go through a NAT Gateway or Internet Gateway.

I'd note that using a VPC endpoint service does come with extra charges: https://aws.amazon.com/privatelink/pricing/

If your instance already has a public or Elastic IP address; or accesses public services via a NAT Gateway then you might as well continue to use that method - traffic between EC2 instances and AWS services always stays on the AWS network even if you are using public IP addresses (this is called out in the [VPC FAQ](https://aws.amazon.com/vpc/faqs/)). But if you are only using a NAT Gateway or public/Elastic IP to access CloudWatch Metrics then an endpoint is a better way to go.

Is there a way to get cpu credit balance value inside the burstable ec2 instance instead of getting it from cloudwatch via Internet?

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