Added IPV6

_example/private-subnet/example.tf

@@ -26,5 +26,6 @@ module "private-subnets" {
   type                = "private"
   nat_gateway_enabled = true
   cidr_block          = module.vpc.vpc_cidr_block
+  ipv6_cidr_block     = module.vpc.ipv6_cidr_block
   public_subnet_ids   = ["subnet-XXXXXXXXXXXXX", "subnet-XXXXXXXXXXXXX"]
 }

_example/public-private-subnet/example.tf

@@ -27,4 +27,5 @@ module "subnets" {
   igw_id              = module.vpc.igw_id
   nat_gateway_enabled = true
   cidr_block          = module.vpc.vpc_cidr_block
+  ipv6_cidr_block     = module.vpc.ipv6_cidr_block
 }

_example/public-private-subnet/outputs.tf

@@ -2,11 +2,22 @@ output "public_subnet_cidrs" {
   value       = module.subnets.public_subnet_cidrs
   description = "The CIDR of the subnet."
 }
+
+output "public_subnet_cidrs_ipv6" {
+  value       = module.subnets.public_subnet_cidrs_ipv6
+  description = "The CIDR of the subnet."
+}
+
 output "private_subnet_cidrs" {
   value       = module.subnets.private_subnet_cidrs
   description = "The CIDR of the subnet."
 }
 
+output "private_subnet_cidrs_ipv6" {
+  value       = module.subnets.private_subnet_cidrs_ipv6
+  description = "The CIDR of the subnet."
+}
+
 output "private_tags" {
   value       = module.subnets.private_tags
   description = "A mapping of tags to assign to the resource."

_example/public-subnet/example.tf

@@ -26,4 +26,5 @@ module "subnets" {
   type               = "public"
   igw_id             = module.vpc.igw_id
   cidr_block         = module.vpc.vpc_cidr_block
+  ipv6_cidr_block    = module.vpc.ipv6_cidr_block
 }

_example/public-subnet/outputs.tf

@@ -3,6 +3,11 @@ output "public_subnet_cidrs" {
   description = "The CIDR of the subnet."
 }
 
+output "public_subnet_cidrs_ipv6" {
+  value       = module.subnets.public_subnet_cidrs_ipv6
+  description = "The CIDR of the subnet."
+}
+
 output "public_tags" {
   value       = module.subnets.public_tags
   description = "A mapping of tags to assign to the resource."

main.tf

@@ -50,6 +50,14 @@ resource "aws_subnet" "public" {
     local.public_count + count.index
   )
 
+  ipv6_cidr_block = cidrsubnet(
+    signum(length(var.ipv6_cidr_block)) == 1 ? var.ipv6_cidr_block : var.ipv6_cidr_block,
+    8,
+    local.public_count + count.index
+  )
+
+  assign_ipv6_address_on_creation = false
+
   tags = merge(
     module.public-labels.tags,
     {
@@ -87,6 +95,15 @@ resource "aws_network_acl" "public" {
     protocol   = "-1"
   }
 
+  egress {
+    rule_no         = 101
+    action          = "allow"
+    ipv6_cidr_block = "::/0"
+    from_port       = 0
+    to_port         = 0
+    protocol        = "-1"
+  }   
+
   ingress {
     rule_no    = 100
     action     = "allow"
@@ -96,6 +113,15 @@ resource "aws_network_acl" "public" {
     protocol   = "-1"
   }
 
+  ingress {
+    rule_no         = 101
+    action          = "allow"
+    ipv6_cidr_block = "::/0"
+    from_port       = 0
+    to_port         = 0
+    protocol        = "-1"
+  }
+
   tags       = module.public-labels.tags
   depends_on = [aws_subnet.public]
 }
@@ -128,6 +154,15 @@ resource "aws_route" "public" {
   depends_on             = [aws_route_table.public]
 }
 
+resource "aws_route" "public_ipv6" {
+  count = local.public_count
+
+  route_table_id              = element(aws_route_table.public.*.id, count.index)
+  gateway_id                  = var.igw_id
+  destination_ipv6_cidr_block = "::/0"
+  depends_on                  = [aws_route_table.public]
+}
+
 #Module      : ROUTE TABLE ASSOCIATION PRIVATE
 #Description : Provides a resource to create an association between a subnet and routing
 #              table.
@@ -170,6 +205,14 @@ resource "aws_subnet" "private" {
     count.index
   )
 
+  ipv6_cidr_block = cidrsubnet(
+    signum(length(var.ipv6_cidr_block)) == 1 ? var.ipv6_cidr_block : var.ipv6_cidr_block,
+    8,
+    count.index
+  )
+
+  assign_ipv6_address_on_creation = false
+
   tags = merge(
     module.private-labels.tags,
     {
@@ -208,6 +251,15 @@ resource "aws_network_acl" "private" {
     protocol   = "-1"
   }
 
+  egress {
+    rule_no         = 101
+    action          = "allow"
+    ipv6_cidr_block = "::/0"
+    from_port       = 0
+    to_port         = 0
+    protocol        = "-1"
+  }
+
   ingress {
     rule_no    = 100
     action     = "allow"
@@ -217,6 +269,15 @@ resource "aws_network_acl" "private" {
     protocol   = "-1"
   }
 
+  ingress {
+    rule_no         = 101
+    action          = "allow"
+    ipv6_cidr_block = "::/0"
+    from_port       = 0
+    to_port         = 0
+    protocol        = "-1"
+  }
+
   tags       = module.private-labels.tags
   depends_on = [aws_subnet.private]
 }

outputs.tf

@@ -11,6 +11,11 @@ output "public_subnet_cidrs" {
   description = "CIDR blocks of the created public subnets."
 }
 
+output "public_subnet_cidrs_ipv6" {
+  value       = aws_subnet.public.*.ipv6_cidr_block
+  description = "CIDR blocks of the created public subnets."
+}
+
 output "private_subnet_id" {
   value       = aws_subnet.private.*.id
   description = "The ID of the private subnet."
@@ -21,6 +26,11 @@ output "private_subnet_cidrs" {
   description = "CIDR blocks of the created private subnets."
 }
 
+output "private_subnet_cidrs_ipv6" {
+  value       = aws_subnet.private.*.ipv6_cidr_block
+  description = "CIDR blocks of the created private subnets."
+}
+
 output "public_route_tables_id" {
   value       = aws_route_table.public.*.id
   description = "The ID of the routing table."

variables.tf

@@ -78,6 +78,11 @@ variable "cidr_block" {
   description = "Base CIDR block which is divided into subnet CIDR blocks (e.g. `10.0.0.0/16`)."
 }
 
+variable "ipv6_cidr_block" {
+  type        = string
+  description = "Base CIDR block which is divided into subnet CIDR blocks (e.g. `10.0.0.0/16`)."
+}
+
 variable "public_subnet_ids" {
   type        = list(string)
   default     = []