A) Modules:
Each Modules folder contains 3 files: main.tf, variables.tf and outputs.tf.
Main.tf file contains main templated code. Varialbes.tf contains all variables referred in main.tf file. Outputs.tf exports values which we want to refer in another module.
B) Project-init
This project will create following infrastructure.
• VPC
• IGW, attach it to VPC
• Public subnet AZ1
• Public subnet AZ2
• Public Route table (route to IGW), attach to both public subnet
• Private-app subnet AZ1
• Private-app subnet AZ2
• Private-data subnet AZ1
• Private-data subnet AZ1
• Private-data subnet AZ2
• Security group- 2
• Alb (Application load balancer)
• Public SSL certificate for your domain
Before you initialize the repo, you need to perform following pre-requisite.
• Create S3 bucket in us-east-1 region with bucket name as mentioned on backend.tf file.
• Create domain name in route 53. Copy domain name and paste in the field domain_name of file terraform.tfvars. make sure you adjust alternative_name accordingly. • Create your own custom profile with AWS credentials.
C) Terraform command
• Open terminal in project-init folder
• Use command: terraform init
• Use command: terraform plan
• Use command: terraform apply
• Yes
• Check in AWS management console for resource creation (VPC, Subnet, RT, SG, Alb, SSL cert.)
• Use command: terraform destroy
• Yes
• Check in AWS management console for resource destruction