feat: Add cloudwatch_log_group_arn to outputs

[krrrr38]

PR o'clock

Description

• Problem
  • Currently we cannot apply some resources which depends on eks module generated cloudwatch logs arn, like followings.
• How to solve?
  • add output cloudwatch_log_group_arn

module "eks" {
  source = "terraform-aws-modules/eks/aws"
  ...
}

resource "aws_lambda_permission" "log" {
  ...
  source_arn    = module.eks.cloudwatch_log_group_arn // <- we cannot pass cloudwatch arn in the same terraform apply.
}

To work-around, we need to define data resource. But in this case, we need to execute terraform apply twice to get cloudwatch resource.

data "aws_cloudwatch_log_group" "log" {
  name = module.eks.cloudwatch_log_group_name[0]
}

Checklist

• CI tests are passing
• README.md has been updated after any changes to variables and outputs. See https://github.com/terraform-aws-modules/terraform-aws-eks/#doc-generation

[krrrr38]

ci failed on master branch, and fix it in #1073

[barryib]

Thanks @krrrr38 for your contribution.

[krrrr38]

than you to maintain this module 🙏

[github-actions]

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