Upgrade Jenkins core and plugins (2025Q3)

Last time: Upgrade Jenkins core and plugins (2025Q2) (#42112 - closed)

Preparation

• Go through the changelog, paying attention to changes on how agents connect to controller, config changes that may need update, important changes in plugins, etc.
  • Current version: 2.504.3
  • Available version: ?

Deployment

• Use the 0.list-running-jobs.groovy script in the Jenkins Script Console to get a list of queued and running jobs to manually restart in the end of this process
• Deploy Jenkins upgrade to latest version available
• Use the 1.generate-plugins-list.groovy in the Jenkins Script Console and then the 2.generate-puppet-code.py Python 3 script in your machine to generate a list of up-to-date plugins
• Deploy plugin upgrades
• Manually uninstall removed plugins via Jenkins interface
• Manually delete removed plugins from /var/lib/jenkins/plugins
• Restart all agents from lizard:

  for i in isoworker{1,2,3,4,5,6,7,8}; do sudo -u zen ssh $i sudo systemctl reboot; done

• Manually run the Update jobs script (may be needed so XML is valid with current Jenkins) in jenkins.dragon:

  sudo -u jenkins /usr/local/sbin/deploy_jenkins_jobs update

• Go through warnings in Jenkins interface

Wrap up

• Restart builds that were interrupted by Jenkins restarts.
• Schedule next update.