[ClusterLabs] Notifications on changes in clustered LVM

Digimer lists at alteeve.ca
Mon Jun 19 23:44:17 EDT 2017

On 19/06/17 11:40 PM, Andrei Borzenkov wrote:
> 20.06.2017 02:15, Digimer пишет:
>> 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.
> udev events are sent over netlink, not D-Bus.

I've not used that before. Any docs on how to listen for those events,
by chance? If nothing off hand, don't worry, I can search.

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