Multi VPC AWS Cluster

Backstory

I have used terraform before mainly in College where I had a amazing proffessor who introduced us to terraform as a resource for his class. He used the configs as a way to setup a cloud config for labs on security testing. This was great as a few classes I have done in college we would spend 2 entire classes just setting up envitoments in Virtual box or others! From there I never really kept up with my Terraform learning. I then decided when building my new homelab I wanted to build it using IAC techniques so I decided to relearn Terraform. I started with Relearning the AWS provider since that is what I was most familiar with.

In this example I show how to make a configarable cloud state that can have multiple segerated regions(vpc’s) and run a webpage on them.

How did I start?

Well if the goal is to setup 3 similar vpcs all with subnets, route-tables,ec2 instances and more. You should start with just 1.

GitHub Repo: Terraform-AWS-Single-Instance

From there I moved onto the full project of a unlimted (but limited) amount of VPC setups all with their own webpage.

Multi-AWS-VPC

The stugles I had with this one were vast. From as simple as remembering how to set variables for a array of city names to ensuring all 3 vpcs has unique IPs and subnets.

GitHub Repo: Terraform-AWS-Mutli-VPC

After the terraform apply it takes only about 30 seconds to full deploy each vpc. In total everything that is added is:

• VPC
• Subnet
• Internet Gateway
• Route Table
• Route Table association
• Security Groups
• AWS EC2-Keypair
• EC2 T3.nano Instance

Apply complete! Resources: 26 added, 0 changed, 0 destroyed.

Outputs:

instance_names_and_ips = 
Calgary-instance: 40.176.84.253
Toronto-instance: 40.177.108.31
Vancouver-instance: 40.176.122.242