The source project of this merge request has been removed.
newer terraform versions(>=0.12.?) 'Warning: Interpolation-only expressions...
Using new terraform (v0.14.7), terraform apply
complains:
Warning: Interpolation-only expressions are deprecated
on .terraform/modules/ec2_dns_maintainer/main.tf line 22, in resource "aws_iam_role" "lambda-role":
22: Service = "${var.service_name}"
Chg interpolations to newer syntax.
The changes in this merge request probably work for terraform >= v0.12.x.