Description of problem:
When upgrading RHV-H from 4.4.8 to 4.4.9, the rpm gets installed but one of the scripts in the installation fails with:

~~~
# yum reinstall redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64
Updating Subscription Management repositories.
Red Hat Virtualization Host for RHEL 8 x86_64 (RPMs)                                     8.7 MB/s | 1.5 MB     00:00
Dependencies resolved.
=========================================================================================================================
 Package                                    Arch      Version                     Repository                        Size
=========================================================================================================================
Reinstalling:
 redhat-virtualization-host-image-update    x86_64    4.4.9-202111172338_8.5      rhvh-4-for-rhel-8-x86_64-rpms    995 M

Transaction Summary
=========================================================================================================================

Total download size: 995 M
Installed size: 994 M
Is this ok [y/N]: y
Downloading Packages:
redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64.rpm                122 MB/s | 995 MB     00:08
-------------------------------------------------------------------------------------------------------------------------
Total                                                                                    122 MB/s | 995 MB     00:08
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                                                                 1/1
  Running scriptlet: redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           1/2
  Reinstalling     : redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           1/2
  Running scriptlet: redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           1/2
warning: %post(redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64) scriptlet failed, exit status 1

Error in POSTIN scriptlet in rpm package redhat-virtualization-host-image-update
  Cleanup          : redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           2/2
  Verifying        : redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           1/2
  Verifying        : redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64                           2/2
Installed products updated.
Unpersisting: redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64.rpm

Reinstalled:
  redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64
~~~


In reviewing the imgbased.log we can see:

~~~
2021-12-13 09:39:57,511 [DEBUG] (MainThread) Calling: (['rpm', '-U', '--quiet', '--justdb', '--root', '/tmp/mnt.esQlr//', '/var/cache/dnf/rhvh-4-for-rhel-8-x86_64-rpms-3b2457f6cf900c31/packages/redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64.rpm'],) {'close_fds': True, 'stderr': -2}
2021-12-13 09:39:57,535 [DEBUG] (MainThread) Exception! b'warning: /var/cache/dnf/rhvh-4-for-rhel-8-x86_64-rpms-3b2457f6cf900c31/packages/redhat-virtualization-host-image-update-4.4.9-202111172338_8.5.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEY\nerror: db5 error(-30969) from dbenv->open: BDB0091 DB_VERSION_MISMATCH: Database environment version mismatch\nerror: cannot open Packages index using db5 -  (-30969)\nerror: cannot open Packages database in /tmp/mnt.esQlr/var/lib/rpm\n'
~~~

So it seems that we mount the on this /tmp/mnt.esQlr mount point the 4.4.9 image:

~~~
2021-12-13 09:35:27,155 [DEBUG] (MainThread) Calling: (['lvs', '--noheadings', '--ignoreskippedcluster', '-olv_path', 'rhvh/rhvh-4.4.9.2-0.20211117.0+1'],) {'stderr': <_io.TextIOWrapper name='/dev/null' mode
='w' encoding='UTF-8'>, 'close_fds': True}
2021-12-13 09:35:27,231 [DEBUG] (MainThread) Returned: b'/dev/rhvh/rhvh-4.4.9.2-0.20211117.0+1'
2021-12-13 09:35:27,231 [DEBUG] (MainThread) Calling: (['mktemp', '-d', '--tmpdir', 'mnt.XXXXX'],) {'close_fds': True, 'stderr': -2}
2021-12-13 09:35:27,234 [DEBUG] (MainThread) Returned: b'/tmp/mnt.esQlr'
2021-12-13 09:35:27,234 [DEBUG] (MainThread) Calling: (['mount', '/dev/rhvh/rhvh-4.4.9.2-0.20211117.0+1', '/tmp/mnt.esQlr'],) {'close_fds': True, 'stderr': -2}
~~~


Then inside the /tmp/mnt.esQlr/var/lib/rpm we get the error above about cannot open the Packages database.




Version-Release number of selected component (if applicable):
4.4.9

How reproducible:
So far seen in two support cases

Steps to Reproduce:
1. Update RHV-H 4.4.8 to RHV-H 4.4.9 from UI or CLI

Actual results:
The post scriptlet fails when checking the /mnt/tmp.XXXX/var/lib/rpm rpm database, with db5 error.

Expected results:
The upgrade should complete as expected

Additional info:
Logs/sosreport will be uploaded shortly.