osas1111 / corpay_interview_assignment

Repository Overview

This repository contains the source code and IaC configurations for an example application written in Ruby on Rails (ROR). The repository is structured to facilitate CI/CD using GitHub Actions. The application is deployed to AWS ECS and relies on MySQL 8.0 RDS for its database. The CI/CD pipeline is responsible for building, testing and creating a container image, storing it in ECR, and deploying to ECS. Load balancing for the application is handled with ALB

• Application:

  The ROR example blog application source code is located in the root directory. Ruby version: 3.2.2

• GitHub Actions Workflow:

  The CI/CD pipeline configuration is stored in the .github/workflows directory.

• Terraform Infrastructure: Terraform version used: v1.5.7 Infrastructure configurations for deploying the application are divided into two parts:

  1. Initial manual configurations: terraform/manual
  2. Automated configurations: terraform/auto

• Database: MySQL v8.0 RDS

• Monitoring ECS has enabled CloudWatch monitoring

• Scalability The application is deployed to AWS Elastic Container Service (ECS), and load balancing is achieved using an Application Load Balancer (ALB). Application automatically scales according to the CPU/Mem consumption

• GitHub Actions Secrets: Credentials and other sensitive information used in the GitHub Actions workflows are securely stored as secrets within GitHub.

CI/CD Workflow

CI/CD process performs the following steps:

1. Build: The application code is built and dependencies are installed.

2. Test: Unit tests, integration tests, or any other specified tests are executed.

3. Docker Image Creation: A Docker container image is created, and the application code is bundled into it.

4. Amazon ECR: The container image is pushed to Amazon Elastic Container Registry (ECR).

5. ECS Deployment: The new container image is deployed to AWS ECS, ensuring the application is up-to-date.

CI/CD SCHEME:

Commit/PR -> Trigger build -> Build -> Test -> Deliver build to ECR -> Terraform updates ECS

Terraform Infrastructure

The Terraform configurations are divided into two parts for ease of management:

1. Manual Part (terraform/manual): Contains configurations that require manual intervention or setup. This include VPC, RDS DB and ECS cluster.

2. Automated Part (terraform/auto): Includes automated configurations that are used for provisioning. This include ECS, security groups, container definition and ALB.

Architecture diagram: