End-to-End DevOps Implementation for a MERN Stack Three-Tier Application

In this guide, we’ll walk through setting up a complete DevOps pipeline for a MERN stack three-tier application. Here's what we'll cover:

  1. Infrastructure Setup with Terraform: We will use Terraform to automate the setup of the infrastructure needed for our application, ensuring everything is consistent and easy to manage.
  2. Continuous Integration with Jenkins: Jenkins will be used for continuous integration to automatically build and test our application whenever code changes are made. This helps catch issues early in the development process.
  3. Continuous Delivery with Argo CD: Argo CD will handle continuous delivery, allowing us to automatically deploy updates to our application in a reliable and repeatable way.
  4. Kubernetes Cluster Setup Using Terraform: We will set up a Kubernetes cluster using Terraform to manage our application deployment. Kubernetes helps in scaling and managing our application efficiently.
  5. Ingress Controller Creation and Configuration: We will configure an ingress controller to expose our application to the internet, managing incoming traffic and routing it to the right services.
  6. Custom DNS Mapping and Route 53 Integration: We'll map a custom domain to our application and integrate it with AWS Route 53 for DNS management, making our application accessible via a friendly URL.
  7. End-to-End CI/CD Demonstration: We will demonstrate the full CI/CD process, showing how code changes are automatically tested, built, and deployed to the live environment.
  8. Monitoring with Prometheus: We will set up Prometheus to monitor our application and infrastructure, collecting metrics that help us understand the performance and health of our system.
  9. Visualization with Grafana: Finally, we will use Grafana to create dashboards that visualize the data collected by Prometheus, providing insights into our application's performance and helping us troubleshoot issues quickly.

By the end of this guide, you will have a fully automated DevOps pipeline for a MERN stack application, including infrastructure setup, continuous integration and delivery, monitoring, and visualization.

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