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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Public subnets in VPC Terraform Module 2 | ======================================== 3 | 4 | A Terraform module to create public subnets in VPC in AWS. 5 | 6 | If you want to create public and private subnets using single module you can use [tf_aws_vpc module](https://github.com/terraform-community-modules/tf_aws_vpc). 7 | 8 | 9 | Module Input Variables 10 | ---------------------- 11 | 12 | - `name` - Name (optional) 13 | - `vpc_id` - VPC id 14 | - `igw_id` - Internet gateway id 15 | - `cidrs` - List of VPC CIDR blocks 16 | - `azs` - List of availability zones 17 | - `map_public_ip_on_launch` - Should be true or false (optional, default is true) 18 | - `tags` - dictionary of tags that will be added to resources created by the module 19 | 20 | Usage 21 | ----- 22 | 23 | ```js 24 | module "public_subnet" { 25 | source = "github.com/terraform-community-modules/tf_aws_public_subnet" 26 | 27 | name = "production-public" 28 | cidrs = ["10.2.1.0/24", "10.2.2.0/24", "10.2.3.0/24"] 29 | azs = ["eu-west-1a", "eu-west-1b", "eu-west-1c"] 30 | vpc_id = "vpc-12345678" 31 | igw_id = "igw-12345678" 32 | 33 | tags { 34 | "Terraform" = "true" 35 | "Environment" = "${var.environment}" 36 | } 37 | } 38 | ``` 39 | 40 | Outputs 41 | ======= 42 | 43 | - `subnet_ids` - Lst of subnet ids 44 | - `public_route_table_ids` - List of route table ids 45 | 46 | Authors 47 | ======= 48 | 49 | Originally created and maintained by [hashicorp/atlas-examples](https://github.com/hashicorp/atlas-examples/tree/master/infrastructures/terraform/aws/network/public_subnet). 50 | Hijacked by [Anton Babenko](https://github.com/antonbabenko). 51 | 52 | License 53 | ======= 54 | 55 | Apache 2 Licensed. See LICENSE for full details. 56 | -------------------------------------------------------------------------------- /main.tf: -------------------------------------------------------------------------------- 1 | variable "name" { 2 | default = "public" 3 | } 4 | variable "cidrs" { 5 | default = [] 6 | } 7 | variable "azs" { 8 | description = "A list of availability zones" 9 | default = [] 10 | } 11 | variable "vpc_id" { 12 | } 13 | variable "igw_id" { 14 | } 15 | variable "map_public_ip_on_launch" { 16 | default = true 17 | } 18 | variable "tags" { 19 | description = "A map of tags to add to all resources" 20 | default = {} 21 | } 22 | 23 | # Subnet 24 | resource "aws_subnet" "public" { 25 | vpc_id = "${var.vpc_id}" 26 | cidr_block = "${element(var.cidrs, count.index)}" 27 | availability_zone = "${element(var.azs, count.index)}" 28 | count = "${length(var.cidrs)}" 29 | map_public_ip_on_launch = "${var.map_public_ip_on_launch}" 30 | 31 | lifecycle { 32 | create_before_destroy = true 33 | } 34 | tags = "${merge(var.tags, map("Name", format("%s.%s", var.name, element(var.azs, count.index))))}" 35 | } 36 | 37 | # Routes 38 | resource "aws_route_table" "public" { 39 | vpc_id = "${var.vpc_id}" 40 | count = "${length(var.cidrs)}" 41 | 42 | tags = "${merge(var.tags, map("Name", format("%s.%s", var.name, element(var.azs, count.index))))}" 43 | } 44 | 45 | resource "aws_route_table_association" "public" { 46 | subnet_id = "${element(aws_subnet.public.*.id, count.index)}" 47 | route_table_id = "${element(aws_route_table.public.*.id, count.index)}" 48 | count = "${length(var.cidrs)}" 49 | 50 | lifecycle { 51 | create_before_destroy = true 52 | } 53 | } 54 | 55 | resource "aws_route" "igw" { 56 | route_table_id = "${element(aws_route_table.public.*.id, count.index)}" 57 | destination_cidr_block = "0.0.0.0/0" 58 | gateway_id = "${var.igw_id}" 59 | count = "${length(var.cidrs)}" 60 | 61 | depends_on = [ 62 | "aws_route_table.public" 63 | ] 64 | 65 | lifecycle { 66 | create_before_destroy = true 67 | } 68 | } 69 | 70 | output "subnet_ids" { 71 | value = [ 72 | "${aws_subnet.public.*.id}" 73 | ] 74 | } 75 | 76 | output "public_route_table_ids" { 77 | value = [ 78 | "${aws_route_table.public.*.id}" 79 | ] 80 | } 81 | --------------------------------------------------------------------------------