continuous integration - How to run jenkins as a different user

Continuous integration - How to run jenkins as a different user

Running Jenkins as a different user can be necessary for various reasons, such as adhering to security policies or isolating Jenkins processes from other services. Here's how you can configure Jenkins to run as a different user on different operating systems:

1. Running Jenkins as a Different User on Linux

Option 1: Using Systemd (for systems with systemd)

  1. Create a New User:

    If you don't already have a user you want Jenkins to run as, create a new user:

    sudo adduser jenkinsuser

  2. Change Ownership of Jenkins Directories:

    Update the ownership of Jenkins directories to the new user:

    sudo chown -R jenkinsuser:jenkinsuser /var/lib/jenkins sudo chown -R jenkinsuser:jenkinsuser /var/log/jenkins sudo chown -R jenkinsuser:jenkinsuser /var/cache/jenkins

  3. Update the Jenkins Service File:

    Edit the Jenkins service file, usually located at /etc/systemd/system/jenkins.service or /lib/systemd/system/jenkins.service. Look for the User= and Group= directives and update them:

    [Service] User=jenkinsuser Group=jenkinsuser

  4. Reload Systemd Configuration and Restart Jenkins:

    sudo systemctl daemon-reload sudo systemctl restart jenkins

Option 2: Using Init.d (for older systems without systemd)

  1. Create a New User:

    Create a new user as described above.

  2. Change Ownership of Jenkins Directories:

    Change ownership of Jenkins directories:

    sudo chown -R jenkinsuser:jenkinsuser /var/lib/jenkins sudo chown -R jenkinsuser:jenkinsuser /var/log/jenkins sudo chown -R jenkinsuser:jenkinsuser /var/cache/jenkins

  3. Edit the Init.d Script:

    Edit the Jenkins init script, usually located at /etc/init.d/jenkins. Find the lines where JENKINS_USER and JENKINS_GROUP are defined and update them:

    JENKINS_USER=jenkinsuser JENKINS_GROUP=jenkinsuser

  4. Restart Jenkins:

    sudo service jenkins restart

2. Running Jenkins as a Different User on Windows

Option 1: Using the Jenkins Windows Service Manager

  1. Open the Services Management Console:

    Open the Windows Services console by running services.msc.

  2. Find the Jenkins Service:

    Locate the Jenkins service in the list.

  3. Change the Log On Account:

    • Right-click on the Jenkins service and select Properties.
    • Go to the Log On tab.
    • Select This account, and then enter the username and password of the user you want Jenkins to run as.
    • Click OK to save the changes.

  4. Restart Jenkins Service:

    • Right-click on the Jenkins service and select Restart.

Option 2: Running Jenkins as a Different User Using the Command Line

  1. Open a Command Prompt as Administrator:

    Run Command Prompt with elevated privileges.

  2. Stop the Jenkins Service:

    net stop jenkins

  3. Change the Jenkins Service User:

    sc config jenkins obj= "DOMAIN\username" password= "password"

    Replace DOMAIN\username with the appropriate user and password with the user's password.

  4. Start the Jenkins Service:

    net start jenkins

3. Verification

Regardless of the operating system, you should verify that Jenkins is running under the new user:

  • Linux: Check the running Jenkins process to ensure it is running under the new user:

    ps aux | grep jenkins

  • Windows: Verify the user by checking the Jenkins service properties in the Services Management Console.

By following these steps, you should be able to configure Jenkins to run as a different user. Ensure that the new user has the necessary permissions for Jenkins directories and other resources it needs to access.

Examples

  1. "How to change the user Jenkins runs as on a Linux system?"

    Description: Modify the Jenkins service configuration to run Jenkins as a different user on a Linux system.

    Code:

    sudo nano /etc/default/jenkins # Find the line starting with JENKINS_USER and modify it JENKINS_USER=newuser # Restart Jenkins for the changes to take effect sudo systemctl restart jenkins

    Explanation: Edit the Jenkins default configuration file to specify a different user and restart the Jenkins service.

  2. "How to run Jenkins as a specific user using systemd on Linux?"

    Description: Configure the Jenkins systemd service to run as a specific user.

    Code:

    sudo nano /etc/systemd/system/jenkins.service # Add or modify the User and Group fields [Service] User=newuser Group=newgroup # Reload systemd and restart Jenkins sudo systemctl daemon-reload sudo systemctl restart jenkins

    Explanation: Update the Jenkins systemd service file to specify a different user and group, then reload and restart the service.

  3. "How to run Jenkins as a different user on Windows?"

    Description: Change the Jenkins service user on a Windows machine.

    Code:

    # Open a PowerShell session as an administrator # Stop the Jenkins service Stop-Service -Name jenkins # Change the service user $service = Get-WmiObject -Class Win32_Service -Filter "Name='jenkins'" $service.Change($null, $null, $null, $null, 'newuser', 'password') # Start the Jenkins service Start-Service -Name jenkins

    Explanation: Stop the Jenkins service, update the service credentials to a different user, and then start the service again.

  4. "How to configure Jenkins to run as a different user on Ubuntu?"

    Description: Use the Jenkins configuration file to change the user on Ubuntu.

    Code:

    sudo nano /etc/sysconfig/jenkins # Modify the JENKINS_USER variable JENKINS_USER=newuser # Restart Jenkins service sudo systemctl restart jenkins

    Explanation: Edit the Jenkins configuration file to set a new user and restart the Jenkins service to apply the changes.

  5. "How to modify Jenkins user permissions in a Docker container?"

    Description: Change the Jenkins user within a Docker container.

    Code:

    # Dockerfile snippet to run Jenkins as a different user USER newuser # Build and run the Docker container docker build -t myjenkins . docker run -d -p 8080:8080 myjenkins

    Explanation: Use the USER directive in the Dockerfile to specify a different user and build and run the Docker container accordingly.

  6. "How to change Jenkins user in a Docker Compose setup?"

    Description: Configure Jenkins user in a Docker Compose file.

    Code:

    version: '3' services: jenkins: image: jenkins/jenkins:lts user: "newuser:newgroup" ports: - "8080:8080"

    Explanation: Use the user option in the Docker Compose configuration to specify a different user for the Jenkins service.

  7. "How to run Jenkins as a different user using the Jenkins user management plugin?"

    Description: Use the Jenkins User Management Plugin to manage user permissions and roles.

    Code:

    // Example script for Jenkins User Management Plugin import hudson.model.User import jenkins.model.Jenkins def user = User.get('newuser') user.addProperty(new hudson.security.HudsonPrivateSecurityRealm.Details()) Jenkins.instance.save()

    Explanation: Use a Groovy script to manage Jenkins user roles and permissions via the User Management Plugin.

  8. "How to change Jenkins run user on macOS?"

    Description: Update the Jenkins user configuration on macOS.

    Code:

    sudo nano /Library/LaunchDaemons/org.jenkins-ci.plist # Modify the UserName key <key>UserName</key> <string>newuser</string> # Restart Jenkins service sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist

    Explanation: Edit the Jenkins plist file to specify a new user and reload the launch daemon.

  9. "How to run Jenkins with a different user in a Jenkins pipeline?"

    Description: Specify a different user within a Jenkins pipeline script.

    Code:

    pipeline { agent { docker { image 'jenkins/jenkins:lts' args '-u newuser' } } stages { stage('Build') { steps { script { sh 'echo "Running as user $(whoami)"' } } } } }

    Explanation: Use Docker arguments in a Jenkins pipeline to specify a different user for running the pipeline.

  10. "How to update Jenkins to run as a new user on a system with multiple Jenkins instances?"

    Description: Change the user for Jenkins in a multi-instance setup.

    Code:

    # Stop all Jenkins instances sudo systemctl stop jenkins # Update the Jenkins user in each configuration sudo nano /etc/default/jenkins # Change the JENKINS_USER variable for each instance # Restart all Jenkins instances sudo systemctl start jenkins

    Explanation: Stop Jenkins, update user settings for each instance, and then restart Jenkins services to apply the changes.

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