[Bug 1194320] L3: sles12sp4 -> sles15sp1 upgrade of HLI in Azure results in non-bootable system

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https://bugzilla.suse.com/show_bug.cgi?id=1194320
https://bugzilla.suse.com/show_bug.cgi?id=1194320#c34

--- Comment #34 from Jordan Causey <jordan.causey at suse.com> ---
Apologies for the delay in updates on this bug. The customer tested the PTF in
late April and had a similar issue where the host was unable to see attached
storage (multipath devices) after upgrade.

Our suspicion is that this behavior could be related to a lack of multipath
kernel support (dm-multipath.ko), due to the dracut "--no-kernel" param (which
results in an initrd built without kernel modules).

If this hypothesis seems reasonable, we'd like to request a new
SLES15-Migration PTF with the suse_migration_services scripts amended to remove
this flag ("--no-kernel"). From what I can tell, this param is set in
suse_migration_services/units/regenerate_initrd.py in the run_dracut function.

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