[missed hitting reply-all] On Oct 16, 2014, at 5:20 PM, Michael Stinaff <mstin...@gmail.com> wrote:
> Just realized that I have ignored an important piece of info that actually > started me on this quest. Thank you for following me through the mud. > Hopefully this will clear a few things up. > > Most if not all of the servers will be ESXi or FreeNAS boxes. FreeNAS has > nut built in and ESXi can have it added in with this great user created VIB > http://rene.margar.fr/2012/05/client-nut-pour-esxi-5-0/ > > However both can only monitor a single UPS. > > So what I really need (but forgot I needed) is a way to create a virtual UPS > that groups two physical UPSes I admit I had not considered shutting down via something other than a fully configurable upsmon. You might be able to sneak behind the FreeNAS GUI and manually generate upsmon.conf, but that seems brittle, and I have no idea what the equivalent is for the ESXi add-on. > Is this what I need? http://www.networkupstools.org/docs/man/dummy-ups.html > Is there a best practice or standard config for doing this? Well, it is certainly possible to script up a virtual driver using dummy-ups, but I don't know if anyone is doing that in production. (Despite the wording of the man page regarding the "meta UPS" concept, the code to combine UPSes into a single virtual UPS is not implemented-- dummy-ups will currently either read from a file, or act as a proxy for another single UPS.) What you could do is write a script to poll two UPSes, and combine their status. Technically, for a shutdown, you only need to poll "ups.status", and then construct a truth table to map OB+OB to OB, OB+LB to OB (assuming two PSUs) and LB+LB (or LB plus any comms errors) to LB. Then, FreeNAS should be able to shut down based on the dummy-ups status. Again, the Raspberry Pi would probably be capable of this. > Thank you and sorry for the wild goose chase! > > No ascii diagrams this time. How about a squirrel? > > ,;;:;, > ;;;;; > ,:;;:; ,'=. > ;:;:;' .=" ,'_\ > ':;:;,/ ,__:=@ > ';;:; =./)_ > `"=\_ )_"` > ``'"` Excellent idea :-) -- Charles Lepple clepple@gmail
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