Description of problem:
Limited number of customers have vanilla multipathd running on overcloud nodes. They reported problems with FFU upgrade procedure: after node is rebooted, "RHEL-Upgrade-Initramfs" boot menu entry doesn't work as expected and simply hangs without actually booting OS.

This may be related to the following known problems:
https://access.redhat.com/solutions/6962799
https://issues.redhat.com/browse/RHEL-3290
https://issues.redhat.com/browse/RHEL-3289

Workaround was to stop the boot and edit initramfs (by adding nompath to list of kernel args) and then let it boot in 9.2. After leapp actions are completed, cleanup is needed for modified menuentry in /boot/loader/entries/ folder

While workaround worked fine on a separate node, it is not applicable in huge deployments. So we need to figure out a better workaround or permanent solution

Version-Release number of selected component (if applicable): RHOSP 17.1 leapp

How reproducible: see description

Actual results: leapp fails to boot a node with multipath with pre-existing kernel arguments

Expected results: leapp is able to boot a node with pre-existing kernel arguments or simple workaround exist that is applicable in deployments with many nodes

Additional info: