Terraform-VPC is a project that contains scripts that set up network configurations for a web application, database and a loadbalancer on AWS using terraform

The following guidelines describe the process of creating a custom network(VPC) using this terraform scripts

1. Clone the repository and cd into Terraform-VPC directory

     git clone https://github.com/Davitron/Terraform-VPC
     cd Terraform-VPC
   

2. The major prerequisite to run a terraform file, is the terraform cli. This package has to be installed.

   • You can install terraform using homebrew by running brew install terraform.

3. After the installation of terraform, the next step is to run the following command terraform init to initialize Terraform

4. Having initialized terraform, it is important specify our AWS secret and access key. To get this done, you can create a credential file preferably in the ~/.aws/ directory just like this ~/.aws/credentials

   [default]
   aws_access_key_id = AWS ACCESS KEY ID
   aws_secret_access_key = AWS SECRET KEY
   

5. To be able to access the instances created by terraform, it is imperative to have create a keypair with any name. You can follow the instruction below to create a keypair

   • On your AWS management console, click on the Services drop-down, under the Compute section click on EC2.
   • On EC2 dashboard, By the side-navigation bar under NETWORK & SECURITY section, click on Key Pairs.
   • Click on the button with Create Key Pair description and input whatever name you want as the key pair name value.

6. Change the key_name attribute in the following files to the name of the key_pair created above. app_instance.tf, database_instance.tf and nat_instance.tf

7. Run the terraform apply commmand to create the following resouces on AWS

   • A VPC with a private and public subnet
   • Route table to determine where network traffic is directed.
   • Internet gateway for connecting to the internet
   • Database created in the private subnet
   • Application and NAT instance created in the public subnet
   • Loadbalancer for both the API and Web application