Argo CD Root Application Manager

This project showcases the use of a root Argo CD Application to manage and orchestrate the deployment of two other Argo CD applications, myapp1 and myapp2. The root application approach enables a hierarchical management structure, simplifying the governance of multiple applications across different environments (development and production) within a Kubernetes cluster. The project utilizes a customizable Helm Chart, allowing for easy adaptation of the applications with support for custom container images and replica counts.

Technologies:

Project Structure

• Argo CD Application Definitions: YAML files defining Argo CD Application resources for both development and production environments. These files specify the source repository, target revision, deployment destination, and synchronization policies.
• Helm Charts: Contains the Helm chart for deploying the applications. The chart includes templates for Kubernetes Deployment and Service resources, configured to deploy a web application.
• Values Files: Separate values files for development (values_dev.yaml) and production (values_prod.yaml) environments, allowing for environment-specific configurations such as the number of replicas and the container image.

Architecture Diagram

Key Features

• Multi-Environment Deployment: Supports separate configurations for development and production environments, facilitating easy promotion of changes.
• Automated Synchronization: Leveraging Argo CD's sync policies for automated deployment, pruning, and self-healing of application resources.
• Customizable Helm Chart: A Helm chart that can be easily adapted for different applications, with support for custom container images and replica counts.

Prerequisites

Before deploying this project, ensure the following prerequisites are met:

1. AWS EKS Deployed: An Amazon EKS cluster must be deployed and operational. For guidance on setting up an EKS cluster, refer to the project "AWS EKS Clusters Configuration".
2. ArgoCD Deployed in EKS: ArgoCD must be installed and configured within your EKS cluster to manage application deployments. For instructions on deploying ArgoCD on EKS using Terraform, see the project "ArgoCD Deployment on Amazon EKS with Terraform".
3. Choose Container Application: For this project, a Dockerized application is used. You can find the source code on GitHub at "Dockerized TestApp" and the container image on DockerHub at Dockerized PHP web application

Implementation

To leverage the power of automation provided by ArgoCD, follow these steps:

1. Create a Repository: Host the code for this project in a version control repository.
2. Provide Repository Link to ArgoCD: Access the ArgoCD UI and add the repository link for both the development and production environments.
3. Automatic Deployment: ArgoCD will periodically check the specified repository for changes. Upon detecting updates, it will automatically deploy these changes to the respective environments, ensuring that your applications are always up-to-date with the source code.

This approach minimizes manual intervention and leverages ArgoCD's capabilities to ensure a seamless continuous deployment pipeline.

Results

Root Application Management

Development Environment Deployment

Production Environment Deployment

Container Application Running in Development and Production Environments