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πŸ“Œ AWS 3 tier architecture with LBs, ASG and RDS

❢ Description πŸ“

This infrastructure is designed for fault tolerance and high availability, using multiple availability zones and auto-scaling features.

❷ Architecture components πŸ›οΈ

VPC and Networking

  • aws_vpc: The foundational networking component that provides a private, isolated section of the AWS cloud where you can launch AWS resources in a virtual network that you define.
  • aws_subnet: Subdivides your VPC into smaller networks. Each subnet is in a specific availability zone and is used to isolate and control traffic flow for the web, app, and database tiers.
  • aws_internet_gateway: Connects the VPC to the internet, allowing communication between instances in your VPC and the internet.
  • aws_nat_gateway: Used to enable instances in a private subnet to connect to the internet or other AWS services while preventing incoming internet connections.

Auto Scaling and Load Balancing

  • aws_autoscaling_group: Manages a group of EC2 instances, automatically adjusting the number of instances to maintain consistent performance and handle loads efficiently.
  • aws_elb (Elastic Load Balancer): Automatically distributes incoming application traffic across multiple targets, such as EC2 instances, ensuring high availability and fault tolerance.


  • aws_route53_zone and aws_route53_record: Route 53 is Amazon’s DNS service, managing domain names and translating friendly domains into IP addresses (A and CNAME records).
  • aws_waf_web_acl, aws_waf_rule, aws_waf_ipset: AWS WAF protects your web applications from common web exploits and bots that could affect application availability, compromise security, or consume excessive resources.

Database and Storage

  • aws_db_subnet_group: Defines subnets for your database cluster in RDS to operate across different availability zones for fault tolerance.
  • aws_rds_cluster: An Amazon Aurora PostgreSQL-compatible edition cluster provides enhanced performance and scalability for database operations.
  • aws_s3_bucket and aws_s3_bucket_versioning: Defines an S3 bucket for object storage, with versioning enabled to preserve, retrieve, and restore every version of every object stored in your Amazon S3 bucket.

Elastic IPs and Launch Templates

  • aws_eip (Elastic IP): Provides a static IPv4 address for dynamic cloud computing, allowing you to manage the public IP of your instances.
  • aws_launch_template: Provides a template for launching EC2 instances, ensuring that every instance launched has the same configuration.

πŸ›‘οΈΒ Once you clone this architecture from the template catalog, you can also scan it with the native CI/CD engine to know its security posture, its cost, before you deploy it.

😍Also, when you communicate with your colleagues, it’s much easier to show the architecture and explain. Not everyone is a Terraform guru.

πŸš€Β You can get it here:





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