RHVH fails to upgrade: "mount: special device does not exist"
Issue
The upgrade of RHVH from version rhvh-4.2.7.3-0.20181026 to rhvh-4.3.5.3-0.20190805 fails with this error:
warning: %post(redhat-virtualization-host-image-update-4.3.5-20190805.0.el7_7.noarch) scriptlet failed, exit status 1
Non-fatal POSTIN scriptlet failure in rpm package redhat-virtualization-host-image-update-4.3.5-20190805.0.el7_7.noarch
Environment
Red Hat Virtualization Host (RHVH) 4.x
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