What is Jenkins?
Jenkins is an open-source automation tool written in Java with plugins built for Continuous Integration purposes. Jenkins is used to build and test your software projects continuously making it easier for developers to integrate changes to the project making it easier for users to obtain a fresh build.
In Other words, Jenkins facilitates the continuous integration and development of software, It makes everything easier by automating parts like Testing, Building and Deployment.
Jenkins is a CI/CD tool and comes under the category of DevOps.
Continuous Deployment ensures that the entire process shown above is automated. Jenkins achieves this through various plugins. Configuration is offered via both console commands and GUI interfaces. The predominant functionality of Jenkins is to execute, based on time or particular event triggers, a predefined set of steps. Jenkins observes the execution of these steps and in case of a failure, terminates the process. Jenkins notifies build successes and failures
Jenkins Features
Easy Installation
Jenkins is a platform-agnostic, self-contained Java-based program, ready to run with packages for Windows, Mac OS, and Unix-like operating systems.
Easy Configuration
Jenkins is easily set up and configured using its web interface, featuring error checks and a built-in help function.
Available Plugins
There are hundreds of plugins available in the Update Center, integrating with every tool in the CI and CD toolchain.
Extensible
Jenkins can be extended by means of its plugin architecture, providing nearly endless possibilities for what it can do.
Easy Distribution
Jenkins can easily distribute work across multiple machines for faster builds, tests, and deployments across multiple platforms.
Free Open Source
Jenkins is an open-source resource backed by heavy community support.
Jenkins can be used for many platforms as well as for many languages
For example jenkins can be integrated with the following.
✔JAVA ✔ANDROID ✔PYTHON ✔RUBY ✔C/C++ ✔PHP
✔DOCKER, ✔BITBUCKET SERVER, ✔GITHUB ✔CONTINUOUS DELIVERY.
Industries Using Jenkins
Netflix
Netflix is a streaming service that offers a wide variety of award-winning TV shows, movies, anime, documentaries, and more on thousands of internet-connected devices. So Netflix greatly uses Jenkins for its use case. Once a line of code has been built and tested locally using Nebula, it is ready for continuous integration and deployment. The first step is to push the updated source code to a git repository. Teams are free to find a git workflow that works for them.
Once the change is committed, a Jenkins job is triggered. Netflix’s use of Jenkins for continuous integration has evolved over the years. They started with a single massive Jenkins master in their datacenter and have evolved to running 25 Jenkins masters in AWS. Jenkins is used throughout Netflix for a variety of automation tasks above just simple continuous integration.
A Jenkins job is configured to invoke Nebula to build, test and package the application code. If the repository being built is a library, Nebula will publish the .jar to our artifact repository. If the repository is an application, then the Nebula ospackage plugin will be executed.
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