Getting expected ip_address to contain a valid IPv4 address error with AWS provider >= 2.65.0

[zephinzer]

Found a bug? Maybe our Slack Community can help.

Describe the Bug

The AWS provider 2.65.0 introduces additional validation for the ip_address property used in the aws_efs_mount_target resource, previously a blank string will leave it to AWS, but it's now returning an error:

Error: expected ip_address to contain a valid IPv4 address, got: 

  on .terraform/modules/efs/terraform-aws-efs-0.16.0/main.tf line 34, in resource "aws_efs_mount_target" "default":
  34: resource "aws_efs_mount_target" "default" {

See hashicorp/terraform-provider-aws#13626 for more info

Expected Behavior

Not specifying the mount_target_ip_address should work as before.

Steps to Reproduce

Steps to reproduce the behavior:

1. Attempt to provision a new EFS without setting the mount_target_ip_address variable

Screenshots

NA

Environment (please complete the following information):

# terraform version 
> Terraform v0.12.26

# terragrunt --version
> terragrunt version v0.23.7

# terragrunt version
> Terraform v0.12.26
> + provider.aws v2.67.0
> + provider.local v1.4.0
> + provider.null v2.1.2

Additional Context

The solution will be to set the default for mount_target_ip_address to null instead of an empty string, this seems backward compatible too-

[abdennour]

same issue as well :

Error: expected ip_address to contain a valid IPv4 address, got: 

  on .terraform/modules/external_storage.efs/main.tf line 34, in resource "aws_efs_mount_target" "default":
  34: resource "aws_efs_mount_target" "default" {

[abdennour]

I've opened new PR #49 which must fix the issue.