Added opentofu project for creating a custom VPC on AWS

Author: vinod827

.gitignore

@@ -1,4 +1,5 @@
 ./webapp/node_modules/*
 ./webapp/package-lock.json
 webapp/node_modules/
-webapp/package-lock.json
+webapp/package-lock.json
+iac/aws/terraform/creating-custom-vpc/.terraform/

iac/aws/terraform/creating-custom-vpc/.terraform.lock.hcl

@@ -0,0 +1,24 @@
+variable aws_region {
+    default = "us-east-1"
+    description = "AWS region where the resources will be provisioned"
+}
+
+# Configure the AWS Provider
+terraform {
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = "~> 5.0"
+    }
+    # helm = {
+    #     source = "hashicorp/aws"
+    #     version = "~> 2.6"
+    # }
+  }
+}
+
+# Configure region and profile
+provider "aws" {
+  region = var.aws_region
+  profile = "myaws"
+}

iac/aws/terraform/creating-custom-vpc/000.provider.tf

@@ -0,0 +1,10 @@
+resource "aws_vpc" "mycustomvpc" {
+    cidr_block = "10.0.0.0/16"
+    enable_dns_support = true
+    enable_dns_hostnames = true
+
+    tags = {
+        "owner" = "vinod"
+        "Name" = "my custom VPC"
+    }
+}

iac/aws/terraform/creating-custom-vpc/001.vpc.tf

@@ -0,0 +1,7 @@
+resource "aws_internet_gateway" "igw" { 
+    vpc_id = aws_vpc.mycustomvpc.id
+    tags = {
+        "owner" = "vinod"
+        "Name" = "IGW"
+    }
+}

iac/aws/terraform/creating-custom-vpc/002.internet.gateway.tf

@@ -0,0 +1,45 @@
+resource "aws_subnet" "private-us-east-1a" {
+  vpc_id     = aws_vpc.mycustomvpc.id
+  cidr_block = "10.0.1.0/24"
+  availability_zone = "us-east-1a"
+  
+  tags = {
+    "subnet" = "private-us-east-1a"
+    "Name" = "Private Subnet"
+  }
+}
+
+resource "aws_subnet" "private-us-east-1b" {
+  vpc_id     = aws_vpc.mycustomvpc.id
+  cidr_block = "10.0.2.0/24"
+  availability_zone = "us-east-1b"
+
+  tags = {
+    "subnet" = "private-us-east-1b"
+    "Name" = "Private Subnet"
+  }
+}
+
+resource "aws_subnet" "public-us-east-1a" {
+  vpc_id     = aws_vpc.mycustomvpc.id
+  cidr_block = "10.0.3.0/24"
+  availability_zone = "us-east-1a"
+  map_public_ip_on_launch = true
+
+  tags = {
+    "subnet" = "public-us-east-1a"
+    "Name" = "Public Subnet"
+  }
+}
+
+resource "aws_subnet" "public-us-east-1b" {
+  vpc_id     = aws_vpc.mycustomvpc.id
+  cidr_block = "10.0.4.0/24"
+  availability_zone = "us-east-1b"
+  map_public_ip_on_launch = true
+
+  tags = {
+    "subnet" = "public-us-east-1b"
+    "Name" = "Public Subnet"
+  }
+}

iac/aws/terraform/creating-custom-vpc/003.subnets.tf

@@ -0,0 +1,24 @@
+
+resource "aws_eip" "nat" {
+  vpc = true
+
+  tags = {
+    "Name" = "EIP"
+    "Owner" = "Vinod"
+  }
+  
+}
+
+resource "aws_nat_gateway" "nat" {
+  allocation_id = aws_eip.nat.id
+  subnet_id     = aws_subnet.public-us-east-1a.id
+
+  tags = {
+    "Name" = "NAT Gateway"
+    "Owner" = "Vinod"
+  }
+
+  # To ensure proper ordering, it is recommended to add an explicit dependency
+  # on the Internet Gateway for the VPC.
+  depends_on = [aws_internet_gateway.igw]
+}

iac/aws/terraform/creating-custom-vpc/004.nat.tf

@@ -0,0 +1,42 @@
+resource "aws_route_table" "privateroute" {
+  vpc_id = aws_vpc.mycustomvpc.id
+
+  route {
+    cidr_block = "0.0.0.0/0"
+    nat_gateway_id = aws_nat_gateway.nat.id
+  }
+
+  tags = {
+    Name = "private"
+  }
+}
+
+resource "aws_route_table" "publicroute" {
+  vpc_id = aws_vpc.mycustomvpc.id
+
+  route {
+    cidr_block = "0.0.0.0/0"
+    gateway_id = aws_internet_gateway.igw.id
+  }
+
+  tags = {
+    Name = "public"
+  }
+}
+
+resource "aws_route_table_association" "privateassociation_a" {
+  subnet_id      = aws_subnet.private-us-east-1a.id
+  route_table_id = aws_route_table.privateroute.id
+}
+resource "aws_route_table_association" "privateassociation_b" {
+  subnet_id      = aws_subnet.private-us-east-1b.id
+  route_table_id = aws_route_table.privateroute.id
+}
+resource "aws_route_table_association" "publicassociation_a" {
+  subnet_id      = aws_subnet.public-us-east-1a.id
+  route_table_id = aws_route_table.publicroute.id
+}
+resource "aws_route_table_association" "publicassociation_b" {
+  subnet_id      = aws_subnet.public-us-east-1b.id
+  route_table_id = aws_route_table.publicroute.id
+}

iac/aws/terraform/creating-custom-vpc/005.routes.tf

@@ -0,0 +1,6 @@
+## Description
+Creating a custom VPC using OpenTofu.
+
+## Architecture
+![Custom AWS VPC](https://drive.google.com/file/d/1-1enJhmxFLkUp2jaqOkKGFqueP6cF68W/view?usp=sharing)
+