[ClusterLabs] Notifications on changes in clustered LVM

Digimer lists at alteeve.ca
Mon Jun 19 19:15:51 EDT 2017

On 19/06/17 06:59 PM, Ferenc Wágner wrote:
> Digimer <lists at alteeve.ca> writes:
>> So we have a tool that watches for changes to clvmd by running
>> pvscan/vgscan/lvscan, but this seems to be expensive and occassionally
>> cause trouble.
> What kind of trouble did you experience?
>> Is there any other way to be notified or to check when something
>> changes?
> LV (de)activation generates udev events (due to block devices appearing/
> disappearing).  PVs too, but they don't go though clvmd.

Interesting (dbus), I'll look into that.

As to what happens; Total lock up of LVM until a node is fenced out of
the cluster. I have an open RHBZ if you are curious;


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