Jenkins A open-source CI tool for DevOps

The Master and Agent communicate through the TCP/IP protocol. A single Jenkins server might not be sufficient to handle the load that comes with large-scale software projects. The repository is continuously checked by the Jenkins CI server for any changes and changes are pulled by the server. We also look at the Master-Agent architecture in Jenkins.

how does jenkins work

Instead, it is a Continuous Integration and Continuous delivery tool. You can orchestrate application deployments using Jenkins with a wide range of freely available community plugins and native Jenkins workflows. Jenkins is a popular CI tool that implements a continuous integration pipeline and can be created in Declarative Pipelines and Jenkins Job Builder. Jenkins has over 1,500 plugins that enhance flexibility by allowing it to build, deploy, and automate projects over various platforms.

Disadvantages of Jenkins

In the Authorization strategy, select ‘Matrix-based security’. Add environment variable JAVA_HOME pointing to the location where JDK 8 is installed. Add the JDK installation path in the System Environment variable. Developers check-in their respective code changes in ‘The Remote Source Code Repository’ that is depicted on the left-hand side.

Nightly integration is limited, occurring only once per day, as opposed to the continuous process of CI. Jenkins ensures that the code is good and tested well through continuous integration. The final code is merged only when all the tests are successful. This makes sure that no broken code is shipped into production.

What is a Jenkins pipeline?

When Oracle acquired Sun Microsystems in 2010, there was a dispute between Oracle and the Hudson community with respect to the infrastructure used. Let us now explore the topic of what is Jenkins and continuous integration. Continuous integrations regularly break due to some small setting changes. Continuous integration will be paused and therefore requires some developer attention.

how does jenkins work

Jenkins is a self-contained Java program that is agnostic of the platform on which it is installed. It is available for almost all the popular operating systems such as Windows, different flavors of Unix, and Mac OS. In this blog as we try to answer ‘what is Jenkins’, we also deep dive into what is Jenkins pipeline, how does Jenkins work, and more. We would also demonstrate continuous testing with Jenkins using the Jenkins Maven project and Jenkins pipelines. As you finish this blog, you’ll not only find out what is Jenkins, you will also gain sufficient confidence to use Jenkins for continuous testing in DevOps. Jenkins provides developers with an excellent framework from which they can develop and test new codes, resulting in the faster delivery of better quality software.

Polymorphism in Java with Examples – 2023

Jenkins and Hudson therefore continued as two independent projects, each claiming the other was the fork. Any event mapped above, is taken care of by a Jenkins job. A Jenkins job is simply a process that runs on Jenkins server to provide the above mentioned functionality. At the time of this article, there were close to 1500+ plugins available for use.

how does jenkins work

The Pipeline incorporates various plugins that help define procedure steps from version control to the users. Before releasing the build into production, Jenkins may deploy it to an environment that allows for any necessary user acceptance testing . To achieve continuous delivery , these UAT tests may be automated using a tool like Selenium. Jenkins is a widely used program with over 300,000 installations worldwide and rising daily. Software firms may speed up their software development process by adopting Jenkins, which can automate test and build at a high pace.


Jenkins is a Java-based DevOps automation tool for continuous integration/continuous delivery and deployment (CI/CD). Curly brackets enclose each step in the pipeline, expressed as a command with arguments. For the code to move through the Jenkins pipeline, it must first be committed to the source code repository. If you prefer writing code, you may construct a Jenkinsfile using a graphical user interface .

  • If a plugin does not exist, you can write the script for it and share with community.
  • Furthermore, the backbone of this tool is the Jenkins community.
  • Learn how to create a Jenkins project and run the resulting build job.
  • Jenkins carries out testing on the new build and alerts the developer if it fails.
  • This allows all of their developers to focus on what they are good at; development.

Jenkins’ continuous integration pipeline is incredibly powerful and inhabits several tools for different purposes, like hosting, monitoring, testing code, and compilation. Jenkins is the most popular solution what is jenkins for continuous delivery across the globe. Often continuous integration pipelines fail upon changing the settings. Therefore, the developer must restart the integration after any change in Settings.

What is Jenkins? The CI server explained

Jenkins ensures automated integration work where integration issues are minimized. Another key requirement for successful DevOps adoption is to select and use the right tools – the things that will aid information sharing and enable a more efficient workflow. One of the most popular DevOps tools today is Jenkins, a server that automates the CI/CD process and makes it easier for the ‘dev’ and ‘ops’ teams to collaborate effectively. Here’s will look at how Jenkins became such a popular tool and the potential benefits it can offer your IT team. Since Jenkins pipeline is written in code, any number of users can use it as a template, modify it and run customized tests and processes.