Terraform : Infrastructure as code

Using terraform to create infrastrucutre on AWS using code. In this code, we are trying to create a below items:

1. VPC
2. Public Subnet inside VPC
3. Internet Gateway associated with VPC
4. Route Table to Internet Gateway
5. Security Group inside VPC
6. Key Pair used for SSH access
7. EC2 Instance inside our public subnet with an associated security group and generated a key pair

EC2 Operation System: Red Hat Enterprise Linux 8

Create private and public key using Openssl

openssl genrsa -out kp_devops.pem 1024
ssh-keygen -y -f kp_devops.pem > kp_devops.pub

Step to run the terraform configuration:

1. Initialize a Terraform working directory

terraform init

2. Generate and show an execution plan

terraform plan -var-file=variables.tfvars

3. Builds or change Infrastructure

terraform apply -var-file=variables.tfvars

4. To destroy the Infrastructure

terraform destroy -var-file=variables.tfvars

Note: You can update/add variables in variables.tfvars file.

You can now ssh to the EC2 instance using the output public IP and key pair.

ssh -i kp_devops.pem ec2-user@<ipaddress>