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What is Jenkins and How Does It Work?

Jenkins integrates development life-cycle processes of all kinds, including build, document, test, package, stage, deploy, static analysis, and much more. Checking a Jenkinsfile into a source control tool allows the whole team to edit, review, and adapt the steps in the delivery pipeline. The developer Kohsuke Kawaguchi, who worked at Sun systems, wanted to create a method to perform continuous integration. The idea was to test the code before committing to avoid breaking builds.

what is jenkins ci

It has a collection of plugins that make integrating and implementing continuous integration and delivery pipelines a breeze. A Jenkins pipeline’s main feature is that each assignment or job relies on another task or job. As you can see, branch sources for this kind of pipeline in my basic Jenkins installation can be Git or Subversion repositories, including GitHub. If you need other kinds of repositories or different online repository services, it’s just a matter of adding the appropriate plugins and rebooting Jenkins.

Download and Install Jenkins

Step 3) Open your Virtual Machine in Azure and search for networking settings in the search bar, shown in the image below. Here you need to add one Inbound Port Rule, so click on the highlighted button. If you found this blog post helpful and informative, please show your support by clicking the clap button below. Your appreciation motivates me to continue creating content that benefits our community of software engineers and DevOps enthusiasts.

  • It is more adaptable thanks to its sizeable plug-in library, which allows for creating, deploying, and automating across various platforms.
  • Since one of the goals of microservices is to frequently update applications and services, the ability to do so cannot be bounded by release bandwidth.
  • Other plugins can specify different branches, such as a Git branch, a Subversion branch, a GitHub Pull Request, and so on.
  • If any error occurs, Jenkins notifies the developer to act accordingly.

Jenkinsfiles use a Groovy-compatible text-based format to define pipeline processes, and can be either declarative or scripted. Jenkins is built so that it is extensible over any environment and platform for faster development, testing, and deployment. It is more adaptable thanks to its sizeable plug-in library, which allows for creating, deploying, and automating across various platforms. Fortunately, Java is a well-known corporate programming language with a large ecosystem. This provides Jenkins with a stable foundation upon which it can be built by utilizing basic design patterns and tools.

Is Jenkins the only tool available for creating CI/CD pipelines?

The Jenkins server then reads the Jenkinsfile and runs the tasks, pushing the code from the committed source code to runtime in production. Jenkins is a CI system that may communicate with other DevOps tools and notify users when a merge request is ready to merge. This is typically the case when all tests have been passed and all other conditions have been satisfied.

Jenkins can be distributed as a set of WAR files, installers, Docker images, and native packages. One Jenkins node functions as the organizer, called a Jenkins Controller. It can also execute builds, although it isn’t as scalable as Jenkins agents. The “Security Realm” and the “Authorization Realm” are the two security realms that Jenkins supports. A centralized communication platform is a must-have for large teams, and one of the most popular platforms for this purpose is Slack. Jenkins may be integrated with Slack, allowing communication such as triggered activities, their times, users’ names, and outcomes to be shared with others.

Jenkins X

The Jenkins project includes a large plugin ecosystem, the community around it is thriving and it is actively developed. If that sounds appealing to you, then give Jenkins a look for your CI/CD needs. In 2011, there was an issue between Oracle (which had acquired Sun Microsystems) and the open source project’s community, and the community created a fork named Jenkins. For a while both projects were updated independently, but Jenkins proved to be more popular and Hudson is no longer developed.

what is jenkins ci

Complex pipelines, especially, can be difficult to code, debug and maintain. Jenkins has been around much longer than other solutions in this space. This, plus its flexibility, has led to it being widely deployed. For this reason, Jenkins is well understood, with a broad knowledge base, extensive documentation, and abundant community resources. These resources make it easier to install, manage and troubleshoot Jenkins installation. As is the case with most software, there are pros and cons to Jenkins.