What Is Jenkins and How Does it Work? Intro and Tutorial

You leverage a higher degree of automation to enable frequent, secure, and predictable software releases. In this example, the flakey-deploy.shscript will be retried five times. If the health-check.shscript definition of Jenkins fails to execute within five minutes, Jenkins will mark the pipeline’s “Deploy” stage as failed. A Jenkins node is an umbrella term for Agents and Controllers, regardless of their actual roles.

how does jenkins work

Various life cycle stages include building, testing, documenting, packaging, staging, deployment, and more. Jenkins is a powerful application that allows continuous integration and continuous delivery of projects, regardless of the platform you are working on. It is a free source that can handle any kind of build or continuous https://www.globalcloudteam.com/ integration. You can integrate Jenkins with a number of testing and deployment technologies. In this tutorial, we would explain how you can use Jenkins to build and test your software projects continuously. Jenkins pipelines are a versatile and powerful way to define and automate software delivery processes.

Automation Testing Cloud

Once we have added the Pipeline to the Jenkinsfile, click on ‘Open Blue Ocean’ link to run the job. Alternatively, you could also issue a Build by clicking on the ‘Build Now’ option, in which case you need not install the Blue Ocean plugin. Scripted Pipeline is a more traditional way of writing a Jenkins Pipeline as code.

Jenkins is an open-source CI/CD server that helps automate software development and DevOps processes. Blue Ocean’s user interface strives to simplify the user’s journey by removing extraneous elements and simplifying the menu structure. Not only that, but it also provides pipeline visualizations with an integrated failure detection function. The server, whether a virtual machine (VM) or bare metal server, is set up to interact with the minimum number of processes possible. This is possible with a typical server OS and network security mechanism.

Best Practices In DevOps Culture

Jenkins Master (or Master Node) controls how the respective builds should operate. The Jenkins master can also execute the jobs directly but it is always recommended to select the appropriate agent(s) for build and execution-related tasks. Jenkins X offers feedback for all pull requests, providing previews before pushing code changes to the staging and production environments. It helps you incorporate authentication and reliability early on, preventing post-deployment surprises.

how does jenkins work

Using a text editor, ideally one which supports
syntax highlighting, create a new Jenkinsfile in the root directory of the
project. It is assumed that there is already a source control repository set up for
the project and a Pipeline has been defined in Jenkins following
these instructions. This section builds on the information covered in
Getting started with Pipeline
and introduces more useful steps, common patterns, and demonstrates some
non-trivial Jenkinsfile examples. Also, Jenkins Blueocean is a great plugin that gives a great view of pipeline jobs. You can even create a pipeline using the blue ocean visual pipeline editor.

Install Jenkins on Ubuntu in 10 Easy Steps

Its thriving community provides phenomenal support, and its code base is incredibly stable. It has a thriving, active community, it’s easy to deploy, and supports most environments. It’s a free, open-source solution, and you can customize your Jenkins distribution to your needs. Continuous integration is a procedure to integrate all the code changes done by several developers in one project. A code is repeatedly tested after a commit to guarantee the code is error and bug-free. In addition, access to the server via the Jenkins UI is similarly limited to the fewest number of users using standard techniques such as multifactor authentication.

  • Jenkins has a huge community and, you can find support in different forums if you face any issues.
  • Alternatively, you could also issue a Build by clicking on the ‘Build Now’ option, in which case you need not install the Blue Ocean plugin.
  • Continuous integration (CI) happens to be one of the most vital parts of DevOps.
  • This allows pipelines to take advantage of the distributed architecture of Kubernetes to easily scale both on the number of running workflows and within each workflow itself.
  • It is used to build, test and deploy software continuously which makes it easier for developers to integrate changes to the project and makes it easier for users to obtain a fresh build.

Its extensive plugin ecosystem and strong community support make it an essential tool for achieving automation goals effectively. At the time of what is Jenkins blog, it had close to 1500+ plugins contributed by the community. Plugins help in customizing the experience with Jenkins, along with providing support for accelerating activities related to building, deploying, and automating a project. Teams that adopt Codefresh deploy more often, with greater confidence, and are able to resolve issues in production much more quickly.

Jenkins Cheat Sheet – A Beginner’s Guide to Jenkins

Jenkins dramatically improves the efficiency of the development process. For example, a command prompt code may be converted into a GUI button click using Jenkins. One may accomplish this by encapsulating the script in a Jenkins task.

how does jenkins work

When this is processed on the agent, rather than echoing the value hello; ls /, it will echo hello then proceed to list the entire root directory of the agent. Any user able to control a variable interpolated by such a step would be able to make the sh step run arbitrary code on the agent. Jenkins is a CI tool and a CI/CD tool but it is specifically a „continuous integration“ tool, not a „continuous deployment/continuous delivery“ tool. Jenkins offers security tools to help organizations keep their data and systems safe, right out-of-the-box. This includes features like role-based access control, session management, and encryption.

How Does Jenkins Work?

Each time a developer publishes a commit to the source code repository, Jenkins triggers a build. A node is a general term for agents and controllers, regardless of their actual role. Any machine with the ability to build projects and pipelines is a Jenkins node, and the controller is known as the built-in node. Checking a Jenkinsfile into a source control tool allows the whole team to edit, review, and adapt the steps in the delivery pipeline. Jenkins is a well-known continuous integration tool developed initially by Hudson before it became available on the open-source market.

how does jenkins work

He currently works as the ‚Lead Developer Evangelist‘ and ‚Senior Manager [Technical Content Marketing]‘ at LambdaTest. He currently works as the ‘Lead Developer Evangelist’ and ‘Senior Manager [Technical Content Marketing]’ at LambdaTest. You can hover to any stage and have a look at the logs of that particular stage. As shown in the Console Output, the test scenario was executed successfully where the Chrome WebDriver was instantiated and required actions were performed on the webpage under test. The Steps ‘Build’ and post-build action ran without any issues. As shown below, the configuration of tools (i.e. JDK and Maven) was successful.


You can use these plugins to automate tasks, like compiling code, running tests, and deploying applications. You can also use Jenkins to orchestrate complex workflows with multiple steps and different tools. The community originally wrote Jenkins as a build and release tool.

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