Implementing CICD pipeline using GitOps with ArgoCD, Jenkins, Kubernetes, SpringBoot web application

Hello Everyone,

I can explain the process of setting up a CI/CD pipeline using GitOps with ArgoCD, Jenkins, Kubernetes, and a Spring Boot web application project. Here are the steps involved:

1. Prerequisites:

   • Ensure you have a Kubernetes cluster up and running.

   • Install and configure Git, ArgoCD, Jenkins, and Docker on your development machine.

2. Set up the Git repository:

   • Create a Git repository to store your Spring Boot web application code.

   • Push your Spring Boot web application code to the repository.

3. Containerize the Spring Boot application:

   • Create a Dockerfile in the root of your project.

   • Write the necessary instructions to build a Docker image for your Spring Boot application.

   • Build and push the Docker image to a container registry like Docker Hub or AWS ECR.

4. Set up ArgoCD:

   • Install ArgoCD on your Kubernetes cluster by following the official documentation.

   • Connect ArgoCD to your Git repository by adding it as a source.

   • Configure ArgoCD to monitor changes in the Git repository and automatically sync the application to the Kubernetes cluster.

5. Configure Jenkins:

   • Install Jenkins on your development machine or a separate server.

   • Set up Jenkins credentials for accessing the Git repository and container registry.

   • Create a Jenkins pipeline or job that will trigger the CI/CD process.

6. Jenkins CI/CD pipeline:

   • Set up the Jenkins pipeline to listen for changes in the Git repository.

   • When changes are detected, Jenkins will start the pipeline and perform the following steps:

   • Clone the Git repository and fetch the latest code.

   • Build the Spring Boot application using Maven or Gradle.

   • Run tests to ensure code quality.

   • Build the Docker image using the Dockerfile.

   • Push the Docker image to the container registry.

   • Update the Kubernetes manifests with the new image tag.

   • Commit and push the updated Kubernetes manifests to the Git repository.

   • Trigger a sync in ArgoCD to deploy the updated application to the Kubernetes cluster.

7. Deployment with ArgoCD:

   • ArgoCD will receive the Git push event and detect the changes in the Kubernetes manifests.

   • ArgoCD will automatically sync the application in the Kubernetes cluster with the updated manifests.

   • The Spring Boot application will be deployed and updated with the new Docker image.

8. Monitoring and Scaling:

   • Set up monitoring tools like Prometheus and Grafana to monitor the health and performance of your application.

   • Configure autoscaling based on metrics such as CPU and memory usage.

This setup allows you to achieve a GitOps workflow, where all changes to the infrastructure and application are driven by Git commits. Developers push code changes to the Git repository, triggering the CI/CD pipeline in Jenkins. Jenkins builds and tests the application, creates a Docker image, and updates the Kubernetes manifests. ArgoCD automatically deploys and syncs the application with the changes, ensuring continuous delivery.

Github link: https://github.com/NiteshSngh/cicd_gitops_k8s

I sincerely hope that this project will benefit you and improve your resume. We appreciate you reading the article. If you find my blogs educational and entertaining, kindly like and follow. Let's grow and learn together:) - Nitesh Singh