cloudflare-practice

Practice Cloudflare with AWS and Terraform

Introduction

• Cloudflare: https://www.cloudflare.com/
• AWS: https://aws.amazon.com/
• Terraform: https://developer.hashicorp.com/terraform/docs

Deploy AWS infra

We will deploy 2 webservers at VN and US location on 2 EC2 instances

US server

cd us/web-server-us

terraform init

terraform plan

terraform apply

Note the public IP for later use

VN server

cd vn/web-server-vn

terraform init

terraform plan

terraform apply

Note the public IP for later use

Configure Cloudflare DNS and Load Balancer

• Log in to your Cloudflare account and ensure your domain is added and managed through Cloudflare.
• Set up the DNS records to point to your AWS EC2 instances.
• Steps:
  • Go to the DNS section in Cloudflare.
  • Add two A records for your domain/subdomain:
  • Vietnam Record: Point to the EC2 public IP from the AP-Southeast-1 instance.
  • US Record: Point to the EC2 public IP from the US-East-1 instance.

Set Up Cloudflare Load Balancer for Geolocation Routing

• In the Traffic > Load Balancing section, create a load balancer that distributes traffic based on user location.
• Steps:
  • Create two pools: one for each region.
  • Vietnam Pool: Use the IP of the Vietnam EC2 instance.
  • US Pool: Use the IP of the US EC2 instance.
• Define geolocation routing rules:
  • Route Vietnam users to the Vietnam pool (AP-Southeast-1).
  • Route US users to the US pool (US-East-1).
• Set a fallback pool or global default if needed.

Testing the Setup

• Use VPNs to simulate accessing the website from different regions (US and Vietnam).
• Verify that users from Vietnam are routed to the Vietnam instance (which displays "Welcome to the Vietnam infrastructure!") and US users are routed to the US instance.