John Smith
2024-03-22
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Jenkins is an open-source Continuous Integration and Continuous Delivery tool and is written in Java language.
Jenkins helps to build and test the software system continuously, making it easier for developers to integrate changes to the system and obtain a fresh build.
Additionally, it is used to enable developers to continuously check their code and also analyze the post-build actions, if any. With the help of this, the automation testers can use to run their tests when the code is modified.
Jenkins has the following features:
The various advantages of Jenkins are:
Follow the following steps to start Jenkins:
java –jar jenkins.war
Some of the important plugins in Jenkins are as follows:
At the time of development, when multiple developers or teams are working on various segments of the same web application, there is a need to perform integration testing by integrating all modules.
In order to do that, an automated process is performed for each piece of code on a daily basis so that all the code get tested.
The basic requirements to use Jenkins are:
To start Jenkins manually, the following commands can be used:
The pipeline is defined as the suite of plugins that support the implementation and integration of continuous delivery pipelines in Jenkins.
Continuous Integration or Continuous Delivery pipeline consists of build, deploy, test, and release. The pipeline feature helps in saving a lot of time and error in maintaining the builds.
In simple terms, a pipeline is a group of build jobs that are chained and integrated in sequence.
SCM stands for Source Control Management. It helps in providing a history of code development and also helps to resolve conflicts when merging code from multiple sources.
SCM module specifies source code location. The entry point to SCM is specified as jenkins_job.scm
SCM tools that are supported in Jenkins are:
Jenkins saves all the settings, builds artifacts, and logs in the JENKINS_HOME directory. To create a back-up of the Jenkins setup, we need to copy this JENKINS_HOME directory.
You can maintain a separate back file and can copy it whenever needed. You can also copy the Jenkins job directory to clone or replicate a job or to rename the directory.
To clone a GIT repository via Jenkins, you need to enter the e-mail and username for your Jenkins system.
To do the same, you need to switch into your job directory and execute the “git config” command.
To set up a new job in Jenkins, the following steps should be followed:
To move or copy Jenkins from one server to another, the following steps need to be followed:
To make sure that the project build doesn’t break in Jenkins, the following steps need to be followed:
Open the Console Output for the broken build, check the error and verify if any file changes were missed.
If no issue is found from there in that way, then clean and update the local workspace to replicate the problem local and then try to solve it.
There is no difference between Hudson and Jenkins.
Hudson was the former name of the current Jenkins. After going through several issues, the project name was changed from Hudson to Jenkins.
Jenkins file is the text file in which all the definition of pipelines of Jenkins are defined.Jenkins file is being checked into the source control repository.
Post is a section in Jenkins configuration that contains several additional steps that might execute after the completion of the pipeline. The execution of the steps within the condition block depends upon the completion status of the pipeline.
The condition block contains the following conditions: changed success, always, failure, unstable, and aborted.
Triggers in Jenkins are used to define the way in which the Jenkins pipeline should be executed frequently.
PollSCM, Cron, etc. are some of the currently available triggers.
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