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terraform-aws-vpc/vpc-production.tf
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Actualiser vpc-production.tf
2025-08-07 14:59:36 +02:00

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3.9 KiB
HCL

variable "aws_region" {
default = "eu-north-1"
}
variable "environment" {
default = "Production"
}
variable "vpc_cidr" {
default = "10.0.0.0/16"
description = "CIDR block of the vpc"
}
variable "public_subnets_cidr" {
type = list(any)
default = ["10.0.0.0/20", "10.0.32.0/20", "10.0.64.0/20"]
description = "CIDR block for Public Subnet"
}
variable "private_subnets_cidr" {
type = list(any)
default = ["10.0.16.0/20", "10.0.48.0/20", "10.0.80.0/20"]
description = "CIDR block for Private Subnet"
}
locals {
availability_zones = ["${var.aws_region}a", "${var.aws_region}b", "${var.aws_region}c"]
}
# VPC
resource "aws_vpc" "default" {
cidr_block = "10.0.0.0/16"
enable_dns_hostnames = true
enable_dns_support = true
instance_tenancy = "default"
tags = {
Name = "${var.environment}-vpc"
Environment = var.environment
}
}
# Public subnet
resource "aws_subnet" "public_subnet" {
vpc_id = aws_vpc.default.id
count = length(var.public_subnets_cidr)
cidr_block = element(var.public_subnets_cidr, count.index)
availability_zone = element(local.availability_zones, count.index)
map_public_ip_on_launch = true
tags = {
Name = "${var.environment}-${element(local.availability_zones, count.index)}-public-subnet"
Environment = "${var.environment}"
}
}
# Private Subnet
resource "aws_subnet" "private_subnet" {
vpc_id = aws_vpc.default.id
count = length(var.private_subnets_cidr)
cidr_block = element(var.private_subnets_cidr, count.index)
availability_zone = element(local.availability_zones, count.index)
map_public_ip_on_launch = false
tags = {
Name = "${var.environment}-${element(local.availability_zones, count.index)}-private-subnet"
Environment = "${var.environment}"
}
}
#Internet gateway
resource "aws_internet_gateway" "default-internet-gw" {
vpc_id = aws_vpc.default.id
tags = {
"Name" = "${var.environment}-default-internet-gw"
"Environment" = var.environment
}
}
# Elastic-IP (eip) for NAT
resource "aws_eip" "nat_eip" {
vpc = true
depends_on = [aws_internet_gateway.default-internet-gw]
}
# NAT Gateway
resource "aws_nat_gateway" "nat-gw" {
allocation_id = aws_eip.nat_eip.id
subnet_id = element(aws_subnet.public_subnet.*.id, 0)
tags = {
Name = "nat-gateway-${var.environment}"
Environment = "${var.environment}"
}
}
# Routing tables to route traffic for Public Subnet
resource "aws_route_table" "public" {
vpc_id = aws_vpc.default.id
tags = {
Name = "${var.environment}-public-route-table"
Environment = "${var.environment}"
}
}
# Routing tables to route traffic for Private Subnet
resource "aws_route_table" "private" {
vpc_id = aws_vpc.default.id
tags = {
Name = "${var.environment}-private-route-table"
Environment = "${var.environment}"
}
}
# Route for Internet Gateway
resource "aws_route" "public_internet_gateway" {
route_table_id = aws_route_table.public.id
destination_cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.default-internet-gw.id
}
# Route for NAT Gateway
resource "aws_route" "private_internet_gateway" {
route_table_id = aws_route_table.private.id
destination_cidr_block = "0.0.0.0/0"
gateway_id = aws_nat_gateway.nat-gw.id
}
# Route table associations for both Public subnet
resource "aws_route_table_association" "public" {
count = length(var.public_subnets_cidr)
subnet_id = element(aws_subnet.public_subnet.*.id, count.index)
route_table_id = aws_route_table.public.id
}
resource "aws_route_table_association" "private" {
count = length(var.private_subnets_cidr)
subnet_id = element(aws_subnet.private_subnet.*.id, count.index)
route_table_id = aws_route_table.private.id
}