Terraform-module-TGW-attachment

Manages a Transit Gateway VPC Attachment between a VPC (with one or more subnet(s) to select) or a VPN and a Transit Gateway.

Getting Started

Call the module in directly from git or git clone in your working directory.

Prerequisites

Terraform > v.0.12

How it works ?

Usage

Fill in the data.tf with the Transit Gateway references.

data "aws_ec2_transit_gateway" "prod" {
    id = "tgw-xxxxxxx"
}

data "aws_ec2_transit_gateway" "preprod" {
    id = "tgw-yyyyyy"
}

data "aws_ec2_transit_gateway" "dev" {
    id = "tgw-zzzzzz"
}

Call the module in you terraform code.

module "transit_gateway_attachment" {
  source = "git::https://github.com/Ph4rell/Terraform-module-TGW-attachment.git"
  
  subnet_ids = [
      list of subnets ID (example: aws_subnet.subnet.id)
    ]

  transit_gateway_id  = var.transit_gateway_id
  vpc_id              = aws_vpc.vpc.id
  dns_support         = enable/disable
  ipv6_support        = enable/disable
  vpc_name            = var.vpc_name
  contact             = var.contact
  tags                = var.tags

}

Running the test

It is possible to run a test in the test folder.

After a git clone of the project, go to test folder.

Put your test variables in the terraform.tfvars.

Example

vpc_name = "VPC-Test"
contact = "[email protected]"
tags = {
    tag1 = "value1"
    tag2 = "value2"
    tag3 = "value3"
}
transit_gateway = "Prod"

terraform init
terraform plan
terraform apply

Check if the resources have been well created in the account. Don't forget to destroy the resources with terraform.

terraform destroy

Inputs

Name	Description	Type	Default	Required
contact	n/a	string	n/a	yes
dns_support	(Optional) Whether DNS support is enabled. Valid values: disable, enable. Default value: enable	string	"enable"	no
ipv6_support	(Optional) Whether IPv6 support is enabled. Valid values: disable, enable. Default value: disable	string	"disable"	no
subnet_ids	(Required) Identifiers of Subnets (Example: subnet-xxxxxxxxxxxxxxxxx)	list(string)	n/a	yes
tags	A map of tags	map(string)	n/a	yes
transit_gateway	(Required) Select the environement of the Transit Gateway: Prod, Preprod or Dev	string	n/a	yes
transit_gateway_default_route_table_association	(Optional) Boolean whether the VPC Attachment should be associated with the Transit Gateway association default route table. Default value: false	string	false	no
transit_gateway_default_route_table_propagation	(Optional) Boolean whether the VPC Attachment should propagate routes with the Transit Gateway propagation default route table. Default value: false	string	false	no
vpc_id	(Required) Identifier of the VPC to attach	string	n/a	yes
vpc_name	(Required) Provide the logical name of the VPC that will be attached to the transit gateway,format VPC-Name	string	"VPC-CLIENT"	no

Outputs

Name	Description
attach_id	Transit Gateway VPC Attachment identifier
dns_support	Whether DNS support is enabled
ipv6_support	Whether IPv6 support is enabled
subnet_ids	Identifiers of Subnets
tags	Key-value tags for the Transit Gateway VPC Attachment
transit_gateway_id	Transit Gateway identifier
vpc_id	Identifier of the VPC
vpc_owner_id	Identifier of the AWS account that owns the VPC