Answer:- Some of the requirements for using Jenkins are as follows: A source code repository like a Git repository A build script like a Maven script that is checked into the repository

Answer:- Some of the important plugins that are used with Jenkins are: • Git repository • Amazon EC2 • HTML Publisher • JDK Parameter Plugin • Configuration Slicing Plugin

Answer:- The Jenkins Pipeline code is written into a text file called Jenkinsfile, which in turn is checked into a project’s source control repository. 1. Click on the New Item option on the Jenkins dashboard 2. Create a name for the new item 3. Choose the ‘Pipeline’ project, and click on OK 4. In the Pipeline tab, put the Jenkinsfile code 5. Click on Apply and Save 6. Select Build Now, which will start building the Pipeline After the Pipeline is set up, any new branches or pull requests that are created in the repository will be automatically detected by Jenkins, and it will start running Pipelines for them.

Answer:- To configure Docker in Jenkins, we have to follow the below steps: 1. First, we need to click on Manage Jenkins on the Jenkins dashboard. 2. We will then select Manage Plugins on the Configuration page. 3. Next, we need to click on Available once in the tabbed interface, and this will show all the Jenkins plugins available for installation. 4. Then, we will search for a Docker plugin in the search box. There are multiple Docker plugins to choose from. 5. Finally, we will select the Docker plugin.

Answer:- Whenever one wants to integrate Jenkins with GitHub projects, the GitHub plugin can be used. It is used to enable the scheduling of a build, pulling data and code files from the GitHub repository to the Jenkins machine, and triggering every build automatically on the Jenkins server after each commit on the Git repository. This saves time and allows one to incorporate the specific project into the CI process.

Answer:- Before we begin, we need to first have the GitHub Jenkins plugin installed. 1. Go to Manage Jenkins on the Jenkins dashboard, and then select Configure System 2. Choose Add GitHub Server in the GitHub section 3. Add the GitHub token as credentials, and Save 4. Open the Jenkins project 5. Tick off the GitHub project checkbox, and give the GitHub Repository path for the Project URL 6. Under Source Code Management, check the Git box, and in Repositories, give the GitHub Repository URL 7. Under Build Triggers, check the ‘Build when a change is pushed to GitHub’ box 8. Set a webhook to Jenkins after the plugin installation is done 9. Go to Settings and then to Integrations & Services from the GitHub repository 10. Select Add Service, and then add Jenkins (GitHub plugin) 11. The URL of the Jenkins machine should be given as Jenkins Hook URL. Add /github-webhook/

Answer:- Some of the important SCM tools that are supported by Jenkins include: Git Subversion CVS Mercurial

Answer:- These are the mechanisms for starting a Jenkins node agent: From the browser window, launch a Jenkins node agent From the command line, launch a Jenkins node agent When we launch a Jenkins node agent, it will download a JNLP file. A new process is launched on the client machine by JNLP when it runs.

Answer:- There is a folder that contains a file named config.xml. We need to change the settings to false for the security to be disabled when Jenkins is started the next time.

Answer:- First, we need to ensure global security. Then, we have to make sure that Jenkins is integrated with the user directory through an appropriate plugin. The project matrix is enabled for fine tuning the access using the custom version-controlled script for automating the process of rights and privileges in Jenkins. The access to Jenkins data or folder is limited. We will run security audits on it.

Answer:- Initially, Jenkins was called Hudson. However, due to some reasons, the name was changed from Hudson to Jenkins.

Answer:- First, we need to open the console output where the broken build is created and then see if there are any file changes that were missed. If we do not find any issues in this manner, then we can update our local workspace and replicate the problem and then try to solve it.

Answer:- First, we need to copy our jobs directory from the old to the new server. There are multiple ways to do it. We can either move the job from the installation by simply copying the corresponding job directory or we can make a clone of the job directory by making an existing job’s copy. For this, we need to have a different name, which we can rename later.

Answer:- Some steps for scheduling builds in Jenkins are as follows: • First, we should have a source code management commit. • We have to complete the other builds. • Then, we have to schedule it to run at a specified time. • We need to then give a manual build request.