Katello supports upgrades from the previous two versions only. Upgrades should be performed sequentially without skipping versions in between.
Before upgrading, run the upgrade check script that will check for any active tasks:
If Katello is running on a virtual machine, we recommend to take a snapshot prior to upgrading. Otherwise, take a backup of the relevant databases by following the instructions here.
Ensure your operating system is fully up-to-date:
Update the Foreman and Katello release packages:
Clean the yum cache
Update the required packages:
The installer with the –upgrade flag will run the right database migrations for all component services, as well as adjust the configuration to reflect what’s new in Katello 3.12.
If kernel packages are updated during Step 2 the system must be rebooted to ensure the new kernel and SELinux policy are loaded. If there are no kernel or selinux updates then this step can be omitted.
You have now successfully upgraded your Katello to 3.12.
For a rundown of what was added, please see the release notes.
If the above steps failed, please review /var/log/foreman-installer/katello.log and let us know about it if unable to resolve.