Jenkins is a free and open source automation server. It helps automate the parts of software development related to building, testing, and deploying, facilitating continuous integration and continuous delivery. It is a server-based system that runs in servlet containers such as Apache Tomcat. It supports version control tools, including AccuRev, CVS, Subversion, Git, Mercurial, Perforce, ClearCase and RTC, and can execute Apache Ant, Apache Maven and sbt based projects as well as arbitrary shell scripts and Windows batch commands.
What is Jenkins used for?
Continuous Integration and Continuous Delivery are the most important part of the DevOps world and Jenkins is the most famous continuous integration and continuous delivery tool. With CI/CD, industries can accelerate their development process. Let’s understand what is Continuous Integration(CI) and Continuous Delivery(CD) first.
In development practice, while developing any software developers need to program and test their code. Many developers are working on the same project over an SCM tool. They need an environment where they can test it quickly. As fast as they test, they can detect the error and solve that quickly. Using continuous integration tools all things become automate and as the code is pushed the testing begins.
Jenkins achieves Continuous Integration with the help of plugins. The plugin provides the ability to integrate with various DevOps stages.
In DevOps, when you make changes to your product, such as modifying configuration or adding new features quickly and safely by keeping the code in a deployable state all the time, we call it Continuous Delivery.
Continuous Delivery makes deployments routine affairs. The deployments could be of an embedded system or an extensively distributed system. In this process, the changes in your code get automatically prepared, tested, and built. You do so by removing the hardening, testing, and integration phases that are usually present in ‘dev complete.’
- “build integration” — using GitHub to trigger builds “authentication integration” — using GitHub as the source of authentication information to secure a Jenkins instance.
With the help of the Git plugin Jenkins can easily pull source code from any Git repository that the Jenkins build node can access.
The GitHub plugin extends upon that integration further by providing improved bi-directional integration with GitHub. Allowing you to set up a Service Hook which will hit your Jenkins instance every time a change is pushed to GitHub.
Advantage of Jenkins
- Jenkins is an open-source tool that is extremely easy to install and use.
- It is free and available for all the platforms like Windows, macOS, Linux, and others.
- It has great community support
- It has 1000+ plugins to ease your work.
- You can also code the plugin and provide that to the community.
- It is build using Java hence it is portable with all the major platforms.
- Due to CI/CD, it detects errors quickly and that saves the time of the developer as well.