us az ids

Author: DrFaust92

main.tf

@@ -285,7 +285,8 @@ resource "aws_subnet" "public" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = element(concat(var.public_subnets, [""]), count.index)
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   map_public_ip_on_launch         = var.map_public_ip_on_launch
   assign_ipv6_address_on_creation = var.public_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.public_subnet_assign_ipv6_address_on_creation
 
@@ -312,7 +313,8 @@ resource "aws_subnet" "private" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = var.private_subnets[count.index]
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   assign_ipv6_address_on_creation = var.private_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.private_subnet_assign_ipv6_address_on_creation
 
   ipv6_cidr_block = var.enable_ipv6 && length(var.private_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.private_subnet_ipv6_prefixes[count.index]) : null
@@ -338,7 +340,8 @@ resource "aws_subnet" "database" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = var.database_subnets[count.index]
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   assign_ipv6_address_on_creation = var.database_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.database_subnet_assign_ipv6_address_on_creation
 
   ipv6_cidr_block = var.enable_ipv6 && length(var.database_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.database_subnet_ipv6_prefixes[count.index]) : null
@@ -380,7 +383,8 @@ resource "aws_subnet" "redshift" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = var.redshift_subnets[count.index]
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   assign_ipv6_address_on_creation = var.redshift_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.redshift_subnet_assign_ipv6_address_on_creation
 
   ipv6_cidr_block = var.enable_ipv6 && length(var.redshift_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.redshift_subnet_ipv6_prefixes[count.index]) : null
@@ -422,7 +426,8 @@ resource "aws_subnet" "elasticache" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = var.elasticache_subnets[count.index]
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   assign_ipv6_address_on_creation = var.elasticache_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.elasticache_subnet_assign_ipv6_address_on_creation
 
   ipv6_cidr_block = var.enable_ipv6 && length(var.elasticache_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.elasticache_subnet_ipv6_prefixes[count.index]) : null
@@ -456,7 +461,8 @@ resource "aws_subnet" "intra" {
 
   vpc_id                          = local.vpc_id
   cidr_block                      = var.intra_subnets[count.index]
-  availability_zone               = element(var.azs, count.index)
+  availability_zone               = var.use_az_ids == false ? element(var.azs, count.index) : null
+  availability_zone_id            = var.use_az_ids ? element(var.azs, count.index) : null
   assign_ipv6_address_on_creation = var.intra_subnet_assign_ipv6_address_on_creation == null ? var.assign_ipv6_address_on_creation : var.intra_subnet_assign_ipv6_address_on_creation
 
   ipv6_cidr_block = var.enable_ipv6 && length(var.intra_subnet_ipv6_prefixes) > 0 ? cidrsubnet(aws_vpc.this[0].ipv6_cidr_block, 8, var.intra_subnet_ipv6_prefixes[count.index]) : null

variables.tf

@@ -244,6 +244,12 @@ variable "azs" {
   default     = []
 }
 
+variable "use_az_ids" {
+  description = "Whether to use availability zone ids"
+  type        = bool
+  default     = false
+}
+
 variable "enable_dns_hostnames" {
   description = "Should be true to enable DNS hostnames in the VPC"
   type        = bool