This impacts "VDSM and Hooks" in the Admin Guide: https://documentation-devel.engineering.redhat.com/docs/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Administration_Guide/appe-VDSM_and_Hooks.html
This table: Admin Guide B.4. Supported VDSM Events Must be updated with the following two lines: before_update_device after_update_device If that's too cryptic, email me and I'll explain.
*** Bug 976156 has been marked as a duplicate of this bug. ***