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OLVM: All Storage Domain Operations Fail After Cloning a Direct LUN (Doc ID 2805600.1)

Last updated on OCTOBER 01, 2021

Applies to:

Linux OS - Version Oracle Linux 7.9 with Unbreakable Enterprise Kernel [5.4.17] and later
Linux x86-64

Symptoms

After cloning a direct LUN all operations like create/delete/move disk fail.
All LVM related messages in VDSM show errors and any LVM scan command will exit with a status=5.

In vdsm log file:

2021-10-10 00:00:00,000+0 DEBUG (tasks/6) [storage.Misc.excCmd] FAILED: <err> = ' Scan of VG volg from /dev/mapper/36001405269b455786aa4ccd99683bc56 found metadata seqno 3 vs previous 2.\n WARNING: Not using device /dev/mapper/36001405269b455786aa4ccd99683bc56 for PV e505253f-3bba-41d5-b273-b8412a8d03e2.\n WARNING: PV e505253f-3bba-41d5-b273-b8412a8d03e2 prefers device/dev/mapper/36001405269b455786aa4ccd99683bc44 because device was seen first.\n Scan of VG volg from /dev/mapper/36001405a2a6f8c4fb5244f984af17519 found metadata seqno 3 vs previous 2.\n Scan of VG volg from /dev/mapper/36001405269b455786aa4ccd99683bc56 found metadata seqno 3 vs previous 2.\n Recovery of volume group "volg" failed.\n Cannot process volume group volg\n'; <rc> = 5 (commands:219)

Changes

VM Direct attached LUNs are being cloned on the Storage side and presented to other VMs running in the same environment.
For a specific VM, it was necessary to increase the LUN size and Volume Group.

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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