terraform-aws-rds-aurora

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Description

Add an input allowed_ipv6_cidr_blocks to set ipv6_cidr_blocks in the cidr_ingress security group.

Motivation and Context

In the last release, the network_type input was introduced. As allowed_cidr_blocks is assigned to cidr_blocks and this only accepts IPv4 networks, we need a similar way to set the IPv6 CIDR blocks in the cidr_ingress security group when network_type = "DUAL" is used.

Breaking Changes

None

How Has This Been Tested?

I have tested this change with our in-house terraform codebase.

I noticed that when I am creating a new cluster, I get this error (Terraform 1.3.0):

| Error: Invalid count argument
│
│   on ../../terraform-aws-rds-aurora/main.tf line 348, in resource "aws_security_group_rule" "cidr_ingress":
│  348:   count = local.create_cluster && var.create_security_group && (length(var.allowed_cidr_blocks) > 0 || length(var.allowed_ipv6_cidr_blocks) > 0) ? 1 : 0
│
│ The "count" value depends on resource attributes that cannot be determined until apply, so Terraform cannot predict how many instances will be created. To work around this, use the -target argument to first apply only the resources that the count depends on.

Any ideas?

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