On 23/06/14 04:32, Stan Gammons wrote: > Can one have a single UPS powering multiple servers and have them all > shutdown in an orderly fashion pending a power loss? It seems as > though this is possible from what I gathered from the docs, but I've yet > to make this work on an OpenBSD and FreeNAS machine that are powered > from the same UPS. The master server that the UPS is connected to via > USB receives messages from the UPS, but the slave doesn't receive any > messages. Any tips on how to make this work? Yes, it is indeed possible. Here is a brief description of my typical configuration:
- install NUT on all the participating servers - the machine that is physically connected to the UPS (serial or USB) becomes the "NUT server", all others are "NUT clients". - the NUT server has the entire NUT stack (driver, upsd, upsmon, upssched) - NUT clients only use upsmon, and "MONITOR" the UPS published by the NUT server - on the NUT server, use "upssched" to initiate a countdown timer on "ONBATT" events - if the countdown timer expires before the power returns, a custom script is called that issues a "FSD" (forced shutdown) -- this message is sent to all participating servers - on each participating server, configure the shutdown command (upsmon.conf) with a suitable grace period to take into account the dependencies between servers (if any). If you need more information, please mail me directly -- I can share the configuration files and scripts I use. HTH Cheers. Bye. Ph. A. -- *Philippe Andersson* Unix System Administrator IBA Particle Therapy | Tel: +32-10-475.983 Fax: +32-10-487.707 eMail: p...@iba-group.com <http://www.iba-worldwide.com>
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