Over the past few weeks, I've been working on updating our Jenkins version and its associated plugins, a journey that has been both challenging and rewarding. I'd like to share some insights from my experience, hoping that it could be of help to you someday.
First and foremost, setting up a test environment that mirrors your Production Cluster is invaluable. This gives you the confidence to experiment and troubleshoot, providing an indispensable safety net.
When updating, I suggest tackling one LTS version at a time. Run a reference job after each update to ensure everything works smoothly. Once you're satisfied, take a backup of your config.xml file and plugins folder. This precautionary measure enables a quick rollback to the previous version, if necessary.
Update the Jenkins version first, then the plugins. Be sure to run the reference job after each stage and check your management, plugin, and config pages. Keep an eye out for 504 errors and address them promptly. If anything goes awry, revert to the last working state and attempt the update later. To revert, simply replace your current config.xml and plugins folder with the backup and change the Jenkins version.
Encountering issues during updates is a part of the process. For instance, initial launching may fail due to timezone issues. In such cases, you might need to update the jenkins.service page and adjust the initialTimeout to 180 or more. Sometimes, it's a matter of tweaking permissions. Navigating these obstacles requires courage and resilience, especially when dealing with a system that could falter at any moment for any reason. Always keep a backup of your last stable version as a lifeline.
By adhering to these steps and practicing patience, you can successfully update to the latest LTS version for your organization. Remember, it's about continual growth and improvement, so keep going and keep evolving. Best of luck on your Jenkins journey!
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