[linux-lvm] Distributed Locking of LVM

[Zdenek Kabelac]

Dne 28.8.2017 v 14:41 Kalyana sundaram napsal(a):
> We have a shared iscsi disk at all our boxes, with one vg. We are using clvm 
> to manage locks to create extend activate delete list.
> CLVM is tedious to manage especially especially due to reboot if locking is 
> struck somewhere. Instead we are thinking of modifying file_locking.c to get 
> lock with distributed store like zookeeper or redis and on success run the 
> above command, on failure backoff and try again
> The external ocking code will sit at _file_lock_resource, case LCK_VG.
> Do you think its risky. Is there some other way people handle it?
> 

Hi

Have you considered  usage of 'lvmlockd' and it's sanlock interface
(where locks are maintained on shared storage device).

Regards

Zdenek