Terraform | Simple 2-Tier AWS architecture

Project summary:

IAM Role:

1. create IAM role with access to s3 and ec2

Networking and security:

1. Create 1 VPC

2. Create 4 subnet

   • Create 1 public subnet (app-tier) in az1

   • Create 1 public subnet (app-tier) in az2

   • Create 1 private subnet (db-tier) in az1

   • Create 1 private subnet (db-tier) in az2

3. Create 1 Internet Gateway attach to VPC

4. Create 1 Route table in VPC

   • Create 1 route table and attach to igw

   • Associate to app-tier public subnet (az1, az2)

5. Create 3 security group in VPC

   • sg-1 for load balancer with inbound rule http→80, my laptop IP

   • sg-2 in public subnet for app tier with inbound rule http→80, my laptop IP and http→80, sg-1

   • sg-3 in private subnet for db tier with inbound rule tcp→3306, sg-2

Database Deployment:

1. Create subnet group in RDS add 2 private subnet for db tier

2. Create aws RDS instance

Load Balancing and Auto scaling deployment:

1. Create AMI create AMI from running app tier instance

2. Create target group

3. Create LB

4. Create launch template

5. Create auto scaling

The complete terraform code for this project is available in my GitHub repo.