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Ahkar Swe
Ahkar Swe

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🌐 Deploying an AWS VPC with Terraform (Hands-On Lab) — Part 8

#aws #networking #terraform #tutorial

So far in this series, we’ve:

  • Built Terraform fundamentals
  • Created reusable modules
  • Managed remote state
  • Designed production-ready structure
  • Compared workspaces vs environments

Now it’s time to build something real 🔥

👉 A complete AWS VPC using Terraform

🎯 What You’ll Learn

In this guide:

  • What a VPC is
  • How to design basic network architecture
  • Create VPC using Terraform
  • Add subnet and internet gateway

🌐 What is a VPC?

A VPC (Virtual Private Cloud) is:

👉 Your own isolated network in AWS

It allows you to control:

  • IP range
  • Subnets
  • Routing
  • Internet access

🏗️ Architecture We’ll Build 

VPC (10.0.0.0/16)
│
├── Public Subnet (10.0.1.0/24)
│   └── Internet Gateway
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📁 Project Structure 

vpc-lab/
  main.tf
  variables.tf
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🔹 Step 1: Provider Configuration 

provider "aws" {
  region = "ap-southeast-1"
}
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🔹 Step 2: Create VPC 

resource "aws_vpc" "main" {
  cidr_block = "10.0.0.0/16"

  tags = {
    Name = "terraform-vpc"
  }
}
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🔹 Step 3: Create Subnet 

resource "aws_subnet" "public" {
  vpc_id     = aws_vpc.main.id
  cidr_block = "10.0.1.0/24"

  tags = {
    Name = "public-subnet"
  }
}
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🔹 Step 4: Internet Gateway 

resource "aws_internet_gateway" "igw" {
  vpc_id = aws_vpc.main.id

  tags = {
    Name = "main-igw"
  }
}
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🔹 Step 5: Route Table 

resource "aws_route_table" "public" {
  vpc_id = aws_vpc.main.id
}
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🔹 Step 6: Add Internet Route 

resource "aws_route" "internet_access" {
  route_table_id         = aws_route_table.public.id
  destination_cidr_block = "0.0.0.0/0"
  gateway_id             = aws_internet_gateway.igw.id
}
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🔹 Step 7: Associate Subnet 

resource "aws_route_table_association" "a" {
  subnet_id      = aws_subnet.public.id
  route_table_id = aws_route_table.public.id
}
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🚀 Deploy Infrastructure 

terraform init
terraform plan
terraform apply
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🧠 What You Just Built

You now have:

  • A VPC
  • A public subnet
  • Internet access via IGW
  • Routing configuration

👉 This is the foundation of AWS networking.

💡 DevOps Insight

Almost every AWS architecture starts with:

👉 VPC → Subnets → Routing

⚠️ Important Note

Always clean up resources:

terraform destroy
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👉 Avoid unnecessary AWS cost.

🎯 What You Just Learned

  • Basic AWS networking
  • Terraform resource relationships
  • Real infrastructure deployment

💡 Final Thought

This is no longer theory.

👉 You are now building real cloud infrastructure.

🚀 What’s Next?

Next, we go deeper:

👉 Build a 3-tier architecture (ALB + EC2 + DB)

👨‍💻 About the Author

Hi, I’m Ahkar — sharing DevOps, AWS, and Infrastructure knowledge 🚀

🌐 https://mindgnite.com

Follow for more Terraform content 🔥

📚 Terraform Learning Series

  • Part 7: Workspaces vs Environments
  • Part 8: VPC Lab (this post)
  • Part 9: 3-Tier Architecture 🔥

👉 Follow to continue 🚀

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