On Thu, 17 Sep 2020, Kirill Nikonorov wrote:
Hello to All!
It might be not exactly NUT question but implementation.
I have a rack with one UPS and several servers getting power from this device.
One server is a master and other are slaves. All systems are running Debian
4.15.3 kernel and APC UPS. Everything works fine but what I need is to make an
order for shutting down servers as they have different roles.
Is it possible to configure SQL and VM servers to go down first, then mail
server, then NAS and UPS master as the last one after all of them?
I see that in case of power outage all servers receive signal from master
simultaneously. May I change the order somehow?
Nut provides a directive HOSTSYNC [1] in upsmon.conf :
HOSTSYNC seconds
upsmon will wait up to this many seconds in master mode for the slaves to
disconnect during a shutdown situation. By default, this is 15 seconds.
But this looks as if it is not a sufficiently staged approach for your needs.
If you need something more sequenced, it will be necessary to use upssched to
drive a script which does what you want.
Roger
[1] https://networkupstools.org/docs/man/upsmon.conf.html
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