♾️Continuous Integration and Continuous Deployment of Java web application on Kubernetes using GitOps.

This project aims to teach you the implementation of CICD and GitOps for web applications using a range of DevOps tools including Git, Jenkins, SonarQube, Maven, Docker, Kubernetes and Argo CD.

Prerequisites:

  1. General knowledge of server/instance creation on any cloud i.e., AWS, GCP, Azure, Oracle.

  2. Basics of Jenkins pipeline syntax.

  3. Basic understanding of various DevOps tools like SonarQube, Maven, Docker, Kubernetes and Argo CD.

Tools used:

  • Jenkins

  • SonarQube

  • Maven

  • Docker

  • Kubernetes

  • Argo CD

Project Brief:

This project aims to guide the process of automatic deployment of a web application on the Kubernetes cluster over the Apache Tomcat web server.

End to End Web Application Deployment

  1. You can use any of the code as you can get many on the internet or use the same code that I used through the GitHub repo.

  2. Initially, developer will commit the code to GitHub repository, GitHub will trigger the code changes to Jenkins pipeline.

  3. Jenkins pipeline will be configured with the SonarQube which will Continuously Inspect the code for bugs, code smells, and security vulnerabilities through defined quality gates.

  4. Code will be packaged through code build using maven, later will copy the .war or .jar or .ear file i.e., maven build file into tomcat image, to achieve custom built image, this will be pushed to the docker hub repository.

  5. Kubernetes manifest file will be automatically updated with the latest docker image tag and will be pushed to configuration repository of GitHub.

  6. Argo CD a GitOps tool, will pull the changes and sync the application to desired state whenever the changes are made to the configuration repository.

  7. Once the CICD pipeline is finished, the complete process will be automated so that you can deploy the updated code with just one click by utilizing different deployment strategies of Kubernetes. Then the Argo CD will sync the application for desired state.

Source code management:

All the source code used in this project will be stored in a GitHub repository, so you can access it from the below link or you can use your code if you have any

LogoGitHub - SudarshanTevari/web-app-project: This is a CICD projectGitHub
Continuous Integration and Continuous Testing files
LogoGitHub - SudarshanTevari/webapp-config-files: This repo contains configuration files like manifestation yaml file for app delpoyment on kubernetes cluster.GitHub
Configuration files for Continous deployment

Installation:

On the Linux server, install the following packages: Java-11-jdk, Jenkins, docker, microk8s and Argo CD. To install all of them follow the official documentation so that you may not face any errors. Maven will be created as a disposable container in the CICD pipeline itself. Argo CD installation is described in this page of Argo CD part. Whereas SonarQube will be set up as a docker container, follow this repo:

LogoGitHub - SudarshanTevari/sonarqube-on-docker-container: Follow the step wise procedure to setup SonarQube and PosgreSQL DB on the docker containerGitHub
SonarQube and PostgreSQL containerisation

😎 Let's begin the project....

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