What Is Jenkins? How & Why To Use It?

A declarative pipeline, the simpler of the two, uses Groovy-compatible syntax—and if you want, you can start the file with #! A declarative pipeline starts with a pipeline block, defines an agent, and defines stages that include executable steps, as in the three-stage example below. Jenkins offers various plugins to automate various development activities. It provides approximately 1,600 plugins that are spread across five different categories, namely platforms, UI, administration, source code management, and build management. Prior to deploying the code to production, it is crucial to test it for problems.

jenkins software overview

Agents require a Java installation on a physical or virtual machine, such as Bare Metal Cloud instances, Docker images, or Kubernetes clusters. The pipeline project is suitable to build pipelines for complex jobs whereas the freestyle project is suitable for simple jobs. A revamped new-user experience would jenkins software overview help the numerous people who set up Jenkins for the first time. An important part is guiding new users through the installation of important plugins. 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.

Reducing the time it takes to review a code

A strong Jenkins community is one of the prime reasons for its popularity. Jenkins is not only extensible but also has a thriving plugin ecosystem. Jenkins is a widely used program with over 300,000 installations worldwide and rising daily.

jenkins software overview

At present, there are millions of downloads and active users of Jenkins. Written in Java, Jenkins allows continuous development, testing, and deployment of newly created codes. Jenkinsfile can also be committed to the source control repository of the project. With Jenkinsfile, the CD Pipeline is also treated as a part of the application that is versioned, committed, and reviewed like any other piece of code. Depending on the project and build requirements, you could opt for ‘N’ number of agents. Agents can run on different operating systems and depending on the ‘type of build request’, the appropriate Agent is chosen by the Master for build execution and testing.

How Generative AI is a Game Changer for Cloud Security

For example, if a team is developing a project, Jenkins will continuously test the project, builds and show you the errors in the early stages of your development. Jenkins Pipeline is a suite of plugins which supports implementing and integrating continuous delivery pipelines into Jenkins. You can create pipelines directly in the user interface, or create a “Jenkinsfile” which represents a pipeline as code. Jenkinsfiles use a Groovy-compatible text-based format to define pipeline processes, and can be either declarative or scripted.

When used as a continuous integration tool, Jenkins aids software development teams in quickly locating and fixing bugs as well as automating the integration of new code as it is developed. If you have been introduced to the term Jenkins and are unsure how it relates to application development, you are at the right place. Jenkins is an open-source tool that helps the DevOps team in continuous integration. It is a process where there is continuous testing of source code after it is committed to making sure that it is free from bugs or errors. The above-performed UAT tests are automated for continuous delivery with a tool known as Selenium.

Jenkins and the Continuous Delivery Foundation

Any machine with the ability to build projects and pipelines is a Jenkins node, and the controller is known as the built-in node. Jenkins is an automation server written in Java that helps build, test, and continually deploy software. The open-source system is currently one of the leading automation servers. Upon earning certification, developers will be ready to tackle today’s common app design challenges. As you can see in the diagram provided above, on the left is the Remote source code repository. The Jenkins server accesses the master environment on the left side and the master environment can push down to multiple other Jenkins Slave environments to distribute the workload.

Kohsuke Kawaguchi created Jenkins (then called ‘Hudson’) while working at Sun Microsystems. Hudson was created in the summer of 2004 and the first release was in February 2005. Pipelines also support integration with other Jenkins plugins, and they persist across instances of your Jenkins master. The “Security Realm” and the “Authorization Realm” are the two security realms that Jenkins supports. Jenkins’ plugin design allows it to be expanded in almost any way, giving it practically limitless capabilities.

Snapshot Testing Tools for Android

Its vast plugin ecosystem with solid documentation is another plus, making Jenkins highly flexible and extensible. A Jenkins project, or a job, is a user-made automation procedure with a particular goal. Jenkins offers various build jobs by default, and more are available through plugins. The automated testing phases embed into the CI pipeline in Jenkins seamlessly. Various plugins help run unit, integration, functional, and regression tests and store the results for later viewing and analysis.

  • Jenkins also allows you to track repeated tasks throughout a project’s development.
  • Jenkins is a staple of numerous automation-driven, CI-CD-enabled IT infrastructures.
  • Jenkins lets you run a build on multiple machines simultaneously to minimize the total time it takes to run these processes.
  • You can use multiple Jenkins Agents to balance build load, improve performance, and create a secure environment independent of the Controller.
  • Jenkins runs automated Selenium tests as part of a Continuous Integration (CI) or Continuous Delivery (CD) pipeline.
  • Also, the microservices architecture makes it possible to quickly add new features to existing applications and bring them to market.
  • After testing, Jenkins notifies the developers of the test results and build.

Complex pipelines, especially, can be difficult to code, debug and maintain. This part of the Jenkins User Documentation contains a series of introductory
tutorials to help you begin building your applications in an automated fashion
with Jenkins. For new users, Jenkins 2 starts up with suggested plugins to get them
started with the right set of tools to use Jenkins effectively from day one. Let us know see how the syntax of Scripted and declarative pipelines differ. Scripted and declarative pipelines are different only in terms of the programmatic approach. While declarative pipelines use a declarative programming model, scripted ones leverage the imperative programming model.

What are the advantages of Jenkins?

It lets you execute a series of actions to achieve the continuous integration process, that too in an automated fashion. But it’s also not a big deal, and it probably won’t https://www.globalcloudteam.com/ matter much to most people. Overall, pipelines are a great way to turn Jenkins 2.0 into a platform not just for continuous integration, but for continuous delivery as well.

jenkins software overview

Use the tool to get open source technology recommendations from our team of enterprise architects from OpenLogic by Perforce. But if you are looking for something more modern that is easier to set up and takes less to maintain, you may want to select one of the Jenkins alternatives listed above. Jenkins runs as a stand-alone package or on a Java application server. The user interface is web-based and comes with a REST API in both cases. Therefore, a build is one run of a defined project with various steps. Continuous integration is an essential aspect in environments with multiple developers.

What Is a Jenkins Pipeline?

Jenkins security is concerned with both the server and the user. The server, whether a virtual machine or a bare metal server, is designed to enable the fewest number of processes to interface with it. This is achieved using a standard server operating system and networking security capabilities. Furthermore, using common mechanisms such as multifactor authentication, access to the server via the Jenkins UI is limited to the fewest number of people possible. Jenkins has a vibrant development community that meets both in-person and online regularly.