Multiple subnets per AZ. Named subnets (#174)

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* Multiple subnets per AZ

* Multiple subnets per AZ

* Multiple subnets per AZ

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2017-2020 Cloud Posse, LLC
+   Copyright 2017-2023 Cloud Posse, LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

examples/complete/main.tf

@@ -4,10 +4,9 @@ provider "aws" {
 
 module "vpc" {
   source  = "cloudposse/vpc/aws"
-  version = "1.1.0"
-
-  cidr_block = "172.16.0.0/16"
+  version = "2.0.0"
 
+  ipv4_primary_cidr_block                   = "172.16.0.0/16"
   assign_generated_ipv6_cidr_block          = true
   ipv6_egress_only_internet_gateway_enabled = true
 
@@ -17,20 +16,23 @@ module "vpc" {
 module "subnets" {
   source = "../../"
 
-  availability_zones       = var.availability_zones
-  vpc_id                   = module.vpc.vpc_id
-  igw_id                   = [module.vpc.igw_id]
-  ipv4_enabled             = true
-  ipv6_enabled             = true
-  ipv6_egress_only_igw_id  = [module.vpc.ipv6_egress_only_igw_id]
-  ipv4_cidr_block          = [module.vpc.vpc_cidr_block]
-  ipv6_cidr_block          = [module.vpc.vpc_ipv6_cidr_block]
-  nat_gateway_enabled      = false
-  nat_instance_enabled     = false
-  aws_route_create_timeout = "5m"
-  aws_route_delete_timeout = "10m"
+  availability_zones      = var.availability_zones
+  vpc_id                  = module.vpc.vpc_id
+  igw_id                  = [module.vpc.igw_id]
+  ipv4_enabled            = true
+  ipv6_enabled            = true
+  ipv6_egress_only_igw_id = [module.vpc.ipv6_egress_only_igw_id]
+  ipv4_cidr_block         = [module.vpc.vpc_cidr_block]
+  ipv6_cidr_block         = [module.vpc.vpc_ipv6_cidr_block]
+  nat_gateway_enabled     = false
+  nat_instance_enabled    = false
+  route_create_timeout    = "5m"
+  route_delete_timeout    = "10m"
 
   subnet_type_tag_key = "cpco.io/subnet/type"
 
+  subnets_per_az_count = var.subnets_per_az_count
+  subnets_per_az_names = var.subnets_per_az_names
+
   context = module.this.context
 }

examples/complete/outputs.tf

@@ -32,3 +32,53 @@ output "private_route_table_ids" {
   description = "IDs of the created private route tables"
   value       = module.subnets.private_route_table_ids
 }
+
+output "az_private_subnets_map" {
+  description = "Map of AZ names to list of private subnet IDs in the AZs"
+  value       = module.subnets.az_private_subnets_map
+}
+
+output "az_public_subnets_map" {
+  description = "Map of AZ names to list of public subnet IDs in the AZs"
+  value       = module.subnets.az_public_subnets_map
+}
+
+output "az_private_route_table_ids_map" {
+  description = "Map of AZ names to list of private route table IDs in the AZs"
+  value       = module.subnets.az_private_route_table_ids_map
+}
+
+output "az_public_route_table_ids_map" {
+  description = "Map of AZ names to list of public route table IDs in the AZs"
+  value       = module.subnets.az_public_route_table_ids_map
+}
+
+output "named_private_subnets_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of private subnet IDs"
+  value       = module.subnets.named_private_subnets_map
+}
+
+output "named_public_subnets_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of public subnet IDs"
+  value       = module.subnets.named_public_subnets_map
+}
+
+output "named_private_route_table_ids_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of private route table IDs"
+  value       = module.subnets.named_private_route_table_ids_map
+}
+
+output "named_public_route_table_ids_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of public route table IDs"
+  value       = module.subnets.named_public_route_table_ids_map
+}
+
+output "named_private_subnets_stats_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of objects with each object having three items: AZ, private subnet ID, private route table ID"
+  value       = module.subnets.named_private_subnets_stats_map
+}
+
+output "named_public_subnets_stats_map" {
+  description = "Map of subnet names (specified in `subnets_per_az_names` variable) to lists of objects with each object having three items: AZ, public subnet ID, public route table ID"
+  value       = module.subnets.named_public_subnets_stats_map
+}

examples/complete/variables.tf

@@ -7,3 +7,30 @@ variable "availability_zones" {
   type        = list(string)
   description = "List of Availability Zones where subnets will be created"
 }
+
+variable "subnets_per_az_count" {
+  type        = number
+  description = <<-EOT
+    The number of subnet of each type (public or private) to provision per Availability Zone.
+    EOT
+  default     = 1
+
+  validation {
+    condition = var.subnets_per_az_count > 0
+    # Validation error messages must be on a single line, among other restrictions.
+    # See https://github.com/hashicorp/terraform/issues/24123
+    error_message = "The `subnets_per_az` value must be greater than 0."
+  }
+}
+
+variable "subnets_per_az_names" {
+  type = list(string)
+
+  description = <<-EOT
+    The subnet names of each type (public or private) to provision per Availability Zone.
+    This variable is optional.
+    If a list of names is provided, the list items will be used as keys in the outputs `named_private_subnets_map`, `named_public_subnets_map`,
+    `named_private_route_table_ids_map` and `named_public_route_table_ids_map`
+    EOT
+  default     = ["common"]
+}