How can I use `def` in Jenkins Pipeline?

Jenkins is a tool that is used for automation, and it is an open-source server that allows all the developers to build, test and deploy software. By using Jenkins we can make a continuous integration of projects(jobs) or end-to-endpoint automation. Jenkins pipelines are a versatile and powerful way to define and automate software delivery processes. They allow for the creation of continuous integration and continuous delivery (CI/CD) pipelines, enabling teams to efficiently build, test, and deploy applications.

define jenkins

A publisher may report Stable or Unstable result
depending on the result of its processing and its configuration. For example, if a JUnit test fails, then the whole JUnit publisher may
report the build result as Unstable. Kubernetes (K8s) is an open-source system for automating deployment, scaling,
and management of containerized applications. Continuous integration is an essential aspect in environments with multiple developers.

Step 5 — Setting Up Authorization

The options directive for a stage is similar to the options directive at the root of the Pipeline. However, the stage-level options can only contain steps like retry, timeout, or timestamps, or Declarative options that are relevant to a stage, like skipDefaultCheckout. When specified, each stage will run in a new container instance on the same node, rather than all stages running in the same container instance. The options directive allows configuring Pipeline-specific options from within the Pipeline itself. Pipeline provides a number of these options, such as buildDiscarder, but they may also be provided by plugins, such as timestamps. This directive supports a special helper method credentials() which can be used to access pre-defined Credentials by their identifier in the Jenkins environment.

define jenkins

Continuous integration requires the developers to have frequent builds. The common practice is that whenever a code commit occurs, a build should be triggered. Plugins, extensibility, and online community are the core USPs of Jenkins. To improve the usability and functionality of tools like Jenkins, you can use cloud-based cross browser testing platforms. One such platform is LambdaTest that also offers a Jenkins Plugin to accelerate your automated browser testing activities. With LambdaTest, you can perform tests on 3000+ combinations of browsers, operating systems, and devices.

Jenkins Certification Training Course

You have just confirmed that the setup wizard has been disabled. If you’ve specified the –rm flag earlier, the stopped container would automatically be removed. If you want to set 2 custom fields (checkbox, single text) on test run issue type and one custom fields (Radio Button) on scenario and test case level. The above parameters will be parsed dynamically at the run time. String Parameter are selected, and corresponding parameters are added as shown below.

  • It has a thriving, active community, it’s easy to deploy, and supports most environments.
  • There are some nuances when adding an agent to the top level or a stage level when the options directive is applied.
  • Creating automated tests for distinct environments, such as several Java versions or operating systems, helps foresee and prevent problems in later releases.
  • Jenkins uses a pluggable architecture to provide most of its functionality.
  • The Jenkins X project was formerly launched in 2018 with the goal of creating a modern, cloud native Jenkins.

DATE is at the top of the pipeline and can be used in every stage, while NAME is in the “Env Variables” stage, so we can only use it within that stage. The WEBSITE variable is set imperatively, and TEST_VARIABLE is a part of a scripted pipeline. Jenkins Pipeline (or simply “Pipeline” with a capital “P”) is a suite of plugins
which supports implementing and integrating continuous delivery pipelines into
Jenkins. The leading open source automation server, Jenkins provides
hundreds of plugins to support building, deploying and automating
any project.

What is Jenkins Docker?

Pipelines automate testing and reporting on isolated changes in a larger code base in real time and facilitates the integration of disparate branches of the code into a main branch. This definition only describes the upstream open source project. Jenkins is an open source continuous integration/continuous delivery and deployment (CI/CD) automation software DevOps tool written in the Java programming language. Users can set Jenkins environment variables on a global or local level. Add global environment variables through the Jenkins dashboard, while local variables are added using declarative, imperative, and scripted pipelines. I followed your tutorial How To Automate Jenkins Setup with Docker and Jenkins Configuration as Code, it’s very helpful and explained perfectly.

The Stage block is used by many plugins for providing the visualization of Jenkins status (and progress). Scripted Pipeline is a more traditional way of writing a Jenkins Pipeline as code. The Web UI of Jenkins is normally used for writing the Scripted Pipeline in a Jenkinsfile. In this section of the ‘what is Jenkins’ blog, we look at how to do user management in Jenkins, assigning roles to users, and setting up Master and Agents in Jenkins. In subsequent sections of the What is Jenkins blog, we would look at the steps for setting up Jenkins Master and Agents.


There are read-only Jenkins images available in the Docker Hub online repository. The Jenkins X project was formerly launched in 2018 with the goal of creating a modern, cloud native Jenkins. Its architecture, technology and pipeline language are completely different from Jenkins. Jenkins X is designed for Kubernetes and uses it in its own implementation. Other cloud native technology that Jenkins X uses are Helm and Tekton. Jenkins Pipeline is another feature that enhances the offerings of Jenkins, as it lets you implement a Pipeline as Code using Domain Specific Language (DSL).

To achieve this, you need to install an additional plugin called the Authorize Project plugin. After setting up the security realm, you must now configure the authorization strategy. In this step, you will use the Matrix Authorization Strategy plugin to configure permissions for your admin user. You can achieve this by creating a Dockerfile and using the ENV instruction to set the JAVA_OPTS environment variable. I’m coming from Ops and I don’t have a heavy software engineering background.

Disadvantages of Jenkins

Server security is achieved in the same way any other server is secured. Access to where it resides, such as a VM or bare metal server, is configured to allow for the fewest number of processes to communicate with the server. This is accomplished through typical server OS and networking security features.

The Jenkinsfile uses a curly bracket syntax that looks similar to JSON. Steps in the pipeline are declared as commands with parameters and encapsulated in curly brackets. The Jenkins server then reads the Jenkinsfile and executes its commands, pushing the code down the pipeline from committed source code to production runtime.

Declarative Pipeline Example in Jenkins

example below uses the junit step, provided by the
JUnit plugin. By default, the when condition for a stage will not be evaluated before the input, if one is defined. However, this can be changed by specifying define jenkins the beforeInput option within the when block. If beforeInput is set to true, the when condition will be evaluated first, and the input will only be entered if the when condition evaluates to true.