thomasbiddle / terraform-aws-vpc-peering Goto Github PK

View Code? Open in Web Editor NEW

18.0 0.0 16.0 5 KB

A Terraform module to configure a VPC Peering connection in AWS.

Home Page: https://registry.terraform.io/modules/thomasbiddle/vpc-peering

License: MIT License

HCL 100.00%

terraform terraform-modules vpc vpc-peering

terraform-aws-vpc-peering's Introduction

aws_vpc_peering terraform module

A terraform module to provide a VPC peering from one VPC to another.

Notes:

There must not be a CIDR block overlap between the two VPCs.
Ensure that your VPCs have an appropriate "Name" tag as these are used to name the new VPC.
Multi-region VPC Peering cannot be auto-accepted.

Module Input Variables

peer_src_vpc_id - The VPC ID of the initiating VPC.
peer_dst_vpc_id - The VPC ID of the receiving VPC.
peer_src_route_tables - Route tables of the initiating VPC to add routes to the receiving VPC for.
peer_dst_vpc_route_tables - Route tables of the receiving VPC to add routes to the initiating VPC for.
auto_accept - Specify whether or not this connection should automatically be accepted. Must be set to false if VPCs are not in the same region.

Usage

module "vpc_peering" {
  source = "github.com/thomasbiddle/tf_aws_vpc_peering"

  peer_src_vpc_id = "vpc-abcd1234"
  peer_dst_vpc_id = "vpc-abcd5678"
  
  peer_src_route_tables = ["rtb-xyz12345", "rtb-xyz54321", "rtb-xyz99999"]
  peer_dst_route_tables = ["rtb-abcd1234", "rtb-abcd5678"]
  
  auto_accept = true
}

Outputs

peering_connection_id - the ID of the VPC Peering Connection.

Authors

Originally created and maintained by TJ Biddle

License

MIT Licensed. See LICENSE for full details.

terraform-aws-vpc-peering's People

Contributors

Stargazers

Forkers

eric-gonzales tickbox-smc dblaci pcritchfield kidmam roys8 hbangaruu mcon-group predictivehire arcolife patrika1979 ryanoatz99 asmtal ecogit-stage

terraform-aws-vpc-peering's Issues

Option to specify the number of route table

Request

Enhancement to be able to use with Terraform registry AWS VPC

Possible change could be adding module values to specify the number of route tables to update. Or please suggest a work around to avoid the issue (below).

module "vpc-peering" {
  source  = "thomasbiddle/vpc-peering/aws"
  peer_from_vpc_name = "vpc_ms"
  peer_to_vpc_name   = "vpc_ds"
  peer_from_vpc_id = "${module.vpc_ms.vpc_id}"
  peer_to_vpc_id   = "${module.vpc_ds.vpc_id}"

  peer_from_route_tables        = [ "${module.vpc_ms.private_route_table_ids}" ]
  peer_from_route_tables_count  =  1  <---
  peer_to_route_tables          = [ "${module.vpc_ds.intra_route_table_ids}" ]
  peer_to_route_tables_count    =  1    <---
}

Background

Terraform has a limitation of #10857 not being able to run length() on a computed value.

This (error) is the correct behavior not because you're passing in a list, but because you're performing a function call length on a computed value.

Due to the limitation, the VPC peering module causes an error when used with AWS VPC module passing the route table resource yet to be created.

For example:

module "vpc-peering" {
  source  = "thomasbiddle/vpc-peering/aws"
  peer_from_vpc_name = "vpc_ms"
  peer_to_vpc_name   = "vpc_ds"
  peer_from_vpc_id = "${module.vpc_ms.vpc_id}"
  peer_to_vpc_id   = "${module.vpc_ds.vpc_id}"

  # Causes errors when length() is applied as the private_route_table_ids is yet to be created (calculated)
  peer_from_route_tables      = [ "${module.vpc_ms.private_route_table_ids}" ] 
  peer_to_route_tables          = [ "${module.vpc_ds.intra_route_table_ids}" ]
}

The error occurs in aws_route.tf to get the number of route tables to update.

resource "aws_route" "peer_from_to_peer_to" {
  count = "${length(var.peer_from_route_tables)}" <---

AWS Supports Multi-Region Peering

The README file states that AWS does not support multi-region VPC peering; this will only work when both VPCs are within the same region. However, this has changed a while ago. See more information here.

The module should get updated accordingly to use the inter-region peering features.

Documentation typo fix

In Readme.md, s/peer_to_vpc_route_tables/peer_to_route_tables/g.

thomasbiddle / terraform-aws-vpc-peering Goto Github PK

terraform-aws-vpc-peering's Introduction

aws_vpc_peering terraform module

Module Input Variables

Usage

Outputs

Authors

License

terraform-aws-vpc-peering's People

Contributors

Stargazers

Forkers

terraform-aws-vpc-peering's Issues

Option to specify the number of route table

Request

Background

AWS Supports Multi-Region Peering

Documentation typo fix

Recommend Projects

React

Vue.js

Typescript

TensorFlow

Django

Laravel

D3

Recommend Topics

javascript

web

server

Machine learning

Visualization

Game

Recommend Org

Facebook

Microsoft

Google

Alibaba

D3

Tencent