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Deploy Todo Application with RDS(MySql) on AWS EC2

Todo-RDS-MySql-EC2

About

This is an example showing how to deploy a Todo application integrated with RDS(MySql) on to multiple AZs.

  1. Here application and dataBase are deployed in different private subnets which are not directly accessible to outside world.
  2. Nat Gateway provides access to internet to the private subnets.
  3. For deploying application on to EC2 we need an AMI (Amazon Machine Image) which will be created using packer.
  4. To get high availability of Todo App, we deploy our Todo app to run on at least two Availability Zones (AZs) with auto-scaling group. The load balancer also needs at least 2 public subnets in different AZs.

Prerequisite

  • Install AWS CLI

    https://cloudaffaire.com/how-to-install-aws-cli/

  • Install Terraform

    https://learn.hashicorp.com/tutorials/terraform/install-cli

  • Setup AWS credentials

    https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-quickstart.html

Deploy

  • Deploy AWS stack
  
  # Go to environment folder in which you want to deploy cluster
  $ cd ./<account>/<region>/<envionment>
  
  # Create VPC
  $ terraform apply vpc 
  
  # Create RDS(MySql) cluster
  $ terraform apply  database/mysql/todo
  
  # Create TODO AMI
  $ cd ../../../packer/todo 
  $ ssh-keygen -t rsa -C "<email-address>" -f todo
  $ terraform apply 
  
  # Create Todo App EC2 cluster
  $ cd -
  $ terraform apply services/todo/app

To check the application

  • Login to AWS console using your own credentials
  • Click on services and then to EC2
  • Under EC2 click on LoadBalancers
  • Under LoadBalancers copy DNS Name
  • Goto ->> http://<ALB-DNS>/swagger-ui/
  • Now you should see the swagger page for TODO application

Troubleshoot

  • SSH Todo App EC2 instance(s)
  # Add todo private key to key chain
  $ ssh-add -k <todo_pem_file>
   
  # Access the Bastion Host
  $ ssh -i <bastion_pem_file> -A <bastion_user>@<basion_public_ip>
   
  # Access the private instance
  $ ssh springtodo@<todo_private_ip>
   
  # Get status
  $ sudo systemctl status todo

Used AWS Resources

  • AWS EBS (Elastic Block Storage)
  • AWS EC2 (Elastic Compute Cloud)
  • AWS RDS (Relational Database Service)
  • AWS VPC (Virtual Private Cloud)
  • AWS IGW (Internet GateWay)
  • AWS ALB (Application Load Balancer)
  • AWS ASG (Auto Scaling Group)
  • AWS NAT (Network Address Translation)
  • AWS SG (Security Group)
  • AWS AMI (Amazon Machine Image)