[Bug]: aws_eks_addons - heredocs on configuration_values trigger changes

[davivcgarcia]

Terraform Core Version

1.9.6

AWS Provider Version

5.67.0

Affected Resource(s)

aws_eks_addon

Expected Behavior

Provider should handle "heredoc" style of string literal values on configuration_values indepotently.

Actual Behavior

Provider is always triggering changes when the same configuration_values is given. For example:

Terraform will perform the following actions:

  # module.eks.aws_eks_addon.this["snapshot-controller"] will be updated in-place
  ~ resource "aws_eks_addon" "this" {
      ~ configuration_values        = <<-EOT
            tolerations:
              - key: "CriticalAddonsOnly"
                operator: "Exists"
        EOT
        id                          = "kcdporto24:snapshot-controller"
        tags                        = {
            "Environment" = "kcdporto24"
            "GithubOrg"   = "terraform-aws-modules"
            "GithubRepo"  = "terraform-aws-eks"
        }
        # (11 unchanged attributes hidden)

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

N/A

Steps to Reproduce

1. Create EKS cluster
2. Add addons with custom configuration values

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

None

[github-actions[bot]]

Community Note

Voting for Prioritization

• Please vote on this issue by adding a 👍 reaction to the original post to help the community and maintainers prioritize this request.
• Please see our prioritization guide for information on how we prioritize.
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request.

Volunteering to Work on This Issue

• If you are interested in working on this issue, please leave a comment.
• If this would be your first contribution, please review the contribution guide.

[davivcgarcia]

If I replace the heredoc literal string with jsonencode, the behaviour is fixed.

configuration_values = jsonencode(
        {
          tolerations = [
            {
              key = "CriticalAddonsOnly"
              operator = "Exists"
            }
          ]
        }
      )