Terraform AWS VPC Module

Overview

This Terraform module creates an Amazon Virtual Private Cloud (VPC) with both public and private subnets, route tables, Network ACLs (NACLs), and NAT Gateways. It provides an extensible and customizable setup for scalable networking in AWS.

Features

• Creation of a VPC with specified CIDR blocks, tags, and NACL settings.

• Dynamic creation of public and private subnets with automatic retrieval of their IDs.

• Subnet creation with the ability to assign them to specific Availability Zones (AZ) or AZ IDs.

• Independent tagging for each subnet, allowing for individual resource labeling.

• Flexible network management: ability to add new subnets or remove existing ones without impacting other subnets.

• Support for three NAT Gateway scenarios (by default, AZ NAT Gateway is used):

  • AZ: One NAT Gateway is created for each AZ specified in private subnets.

  • SINGLE: One NAT Gateway is created for the entire VPC.

  • SUBNET: One NAT Gateway per subnet.

  • NONE: No NAT Gateway is created for the subnet, and no routes for 0.0.0.0/0 are configured.

  • Each subnet can be configured with any NAT Gateway type, and all types can coexist within a single VPC.

• Custom DHCP options to fine-tune network configurations.

• Output of all created resources, including subnet IDs grouped by type, AZ, and AZ ID.

Table Of Contents

• Quick Start

• Input Variables

  • VPC

  • Subnets

    • Public Subnets

    • Private Subnets

  • Other

• Output

• Examples

• Contribution

• License and Usage Agreement

• Contacts

Quick Start

provider "aws" {
  region = "eu-north-1"
}


module "vpc" {
  source = "ViktorUJ/vpc/aws"
  tags_default = {
    "Owner"       = "DevOps Team"
    "Terraform"   = "true"
    "cost_center" = "1111"
  }
  vpc = {
    name          = "test-vpc"
    cidr          = "10.10.0.0/16"
  }

  subnets = {
    public = {
      "pub1" = {
        name   = "public-subnet-1"
        cidr   = "10.10.1.0/24"
        az     = "eu-north-1c"
      }
      "pub2" = {
        name   = "public-subnet-2"
        cidr   = "10.10.2.0/24"
        az     = "eu-north-1a"
    }

    }
    private = {

     "private1" = {
       name        = "private-subnet-1"
       cidr        = "10.10.11.0/24"
       az          = "eu-north-1a"
       tags        = { "cost_center" = "1234" }

     }
     "private2" = {
       name        = "private-subnet-2"
       cidr        = "10.10.12.0/24"
       az          = "eu-north-1c"
       tags        = { "cost_center" = "5678" }
     }
    }
  }
}

output "vpc_id" {
  value = module.vpc.vpc_raw.id
}

output "vpc_cidr_block" {
  value = module.vpc.vpc_raw.cidr_block
}


output "private_subnets_by_type" {
  value = module.vpc.private_subnets_by_type
}
output "public_subnets_by_type" {
  value = module.vpc.public_subnets_by_type
}

Input Variables

VPC

Subnets

Public Subnets

Private Subnets

Other

Output

Examples

You can find additional examples in the examples directory:

Contribution

If you want to be part of the project development team, get in touch with us. We are always happy to welcome new members to our development team

If you want to say thank you or/and support the active development of module :

• Star the terraform-aws-vpc on Github

• Feel free to write articles about the project on dev.to, medium, hackernoon or on your personal blog and share your experiences.

License and Usage Agreement

• Apache License 2.0