Foreman - Upgrade to Foreman 3.15 and Katello 4.17

NOTE: this guide exists for Upgrading from v3.13 to v3.14 as well --> here

With the current version, the official documentation is quite good and can be referenced.

I would recommend executing all of these commands in a tmux session so that your session will remain on the server in case anything happens to your workstation.

Start by checking for running tasks that would prohibit an update:

 [root@katello01 ~]# foreman-rake katello:upgrade_check

Next, update the katello host and reboot if yum tells you to:

 [root@katello01 ~]# dnf -y --refresh upgrade  
 [root@katello01 ~]# dnf needs-restarting -r

If there were any updates to foreman-related packages, make sure foreman is in a consistent state:

 [root@katello01 ~]# foreman-maintain service stop  
 [root@katello01 ~]# foreman-installer --scenario katello

When the katello services have started again, upgrade the release-rpms:

 [root@katello01 ~]# dnf -y --refresh upgrade https://yum.theforeman.org/releases/3.15/el9/x86_64/foreman-release.rpm https://yum.theforeman.org/katello/4.17/katello/el9/x86_64/katello-repos-latest.rpm

Before updating, stop the foreman-services:

 [root@katello01 ~]# foreman-maintain service stop

Update the system:

 [root@katello01 ~]# dnf -y --refresh upgrade

After the updates have completed, re-run the installer to ensure consistency:

 [root@katello01 ~]# foreman-installer --scenario katello

Check the health of your installation using these commands once the 'foreman-install' command has finished:

 [root@katello01 ~]# foreman-maintain service list  
 [root@katello01 ~]# foreman-maintain service status  
 [root@katello01 ~]# foreman-maintain health check

Once you verified the health of your installation successfully, foreman and katello are updated to foreman version 3.15 and katello version 4.17.

Feel free to comment and / or suggest a topic.

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