How do I enforce policy-as-code for AWS CloudWatch using OPA and Conftest?

In order to enforce policy-as-code for AWS CloudWatch using Open Policy Agent (OPA) and Conftest, you can define rules that will evaluate your infrastructure as code (IaC) files. This helps ensure compliance and governance automatically during your deployment process.

To set up this framework, follow these steps:

  1. Install OPA and Conftest.
  2. Write your policy in Rego, the policy language for OPA.
  3. Use Conftest to test your Terraform or CloudFormation templates against your policies.

Here’s an example of a simple Rego policy that checks for specific CloudWatch Log Group settings:

package cloudwatch # Allow only Logs with encryption enabled violation[msg] { input.resource_type == "aws_cloudwatch_log_group" not input.encrypted msg = sprintf("CloudWatch Log Group %v must have encryption enabled", [input.name]) }

AWS CloudWatch OPA Conftest policy-as-code Rego infrastructure as code compliance governance