Create VPC

Create VPC Lab VPC

VPC module for creating VPC with all the necessary components:

• VPC module

a) Declare variable for VPC

   variable "create_vpc" {
  description = "Controls if VPC should be created (it affects almost all resources)"
  type        = bool
  default     = true
}

variable "name" {
  description = "Name to be used on all the resources as identifier"
  type        = string
  default     = "Workshop01_VPC"
}
#CIDR block
variable "cidr" {
  description = "(Optional) The IPv4 CIDR block for the VPC. CIDR can be explicitly set or it can be derived from IPAM using `ipv4_netmask_length` & `ipv4_ipam_pool_id`"
  type        = string
  default     = "10.0.0.0/16"
}
# availability zones
variable "azs" {
  description = "A list of availability zones names or ids in the region"
  type        = list(string)
  default     = ["us-east-1a", "us-east-1b"]
}

# VPC Public Subnets
variable "vpc_public_subnets" {
  description = "VPC Public Subnets"
  type = list(string)
  default = ["10.0.101.0/24","10.0.102.0/24"]
}

# VPC Private Subnets
variable "vpc_private_subnets" {
  description = "VPC Private Subnets"
  type = list(string)
  default = ["10.0.1.0/24", "10.0.2.0/24"]
}

# VPC Database Subnets
variable "vpc_database_subnets" {
  description = "VPC Private Subnets"
  type = list(string)
  default = ["10.0.3.0/24", "10.0.4.0/24"]
}

b) Create VPC module

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "5.5.1"

  #Asset VPC Details

  name = var.name
  cidr = var.cidr

  azs = var.azs
  private_subnets = var.vpc_private_subnets
  public_subnets = var.vpc_public_subnets
  database_subnets = var.vpc_database_subnets

  # VPC DNS Parameters
  enable_dns_hostnames = true
  enable_dns_support   = true
  # NAT gateway
  enable_nat_gateway = true

  public_subnet_tags = {
    Type = "Public Subnets"
  }
  private_subnet_tags = {
    Type = "Private Subnets"
  } 

  database_subnet_tags = {
    Type = "Database Subnets"
  }
}

c) Output VPC value

# VPC ID
output "vpc_id" {
  description = "The ID of the VPC"
  value       = module.vpc.vpc_id
}
# VPC Private Subnets
output "private_subnets" {
  description = "List of IDs of private subnets"
  value       = module.vpc.private_subnets
}

# VPC Public Subnets
output "public_subnets" {
  description = "List of IDs of public subnets"
  value       = module.vpc.public_subnets
}

# VPC AZs
output "azs" {
  description = "A list of availability zones spefified as argument to this module"
  value       = module.vpc.azs
}