1. A VPC is…
- A single EC2 instance
- Your private network boundary in AWS
- Only a database
- A DNS name
Build VPC with Terraform
Source: doonops-curriculum/aws-vpc--vpc-terraform.md
Doonops lesson
Goal
Build VPC using official module — do not hand-write 20 subnet resources on day one.
Simple explanation
Module = pre-built LEGO kit for VPC. You pass cidr, azs, subnet lists — module builds IGW, routes, NAT.
Technical view
Module = pre-built LEGO kit for VPC. You pass cidr, azs, subnet lists — module builds IGW, routes, NAT.
Think of it like
Module = pre-built LEGO kit for VPC. You pass cidr, azs, subnet lists — module builds IGW, routes, NAT.
Steps
- Read simple section
- Read analogy + diagram
- Copy project files
- Do local lab
Deep explanation
Layman words first, then technical detail — read slowly
Module terraform-aws-modules/vpc/aws saves time. Pin version ~> 5.0.
Hand-writing every subnet is exam knowledge; modules are real job skill.
Example (Doonops)
Modern HCL — names are examples, not from any third-party course
Example HCL
module "vpc" {
source = "terraform-aws-modules/vpc/aws"
version = "~> 5.0"
name = "doonops-vpc"
cidr = "10.1.0.0/16"
azs = ["ap-south-1a"]
public_subnets = ["10.1.1.0/24"]
private_subnets = ["10.1.2.0/24"]
}Terraform runs on your computer — copy this HCL into a folder, then follow the local lab steps below.
Quick check
- Explain topic to a friend in 2 sentences
- Did local lab steps
Project files for this lab
Full implementation folder — copy all files, then run terraform commands
Lab project files (full folder)
Copy every file below into one folder — same as a real repo module. Then run the local lab steps.
Suggested folder: Suggested path: ~/doonops-terraform/10-vpc-terraform/
versions.tfSee file purpose in the code belowterraform {
required_version = ">= 1.9.0"
}
Module check — did you get it?
2–3 quick questions before the next module
VPC — quick check
Quick check — did this module stick?