[ale] APC UPS and linux

[Dow_Hurst]

Trey,
apcupsd does have to be installed on each machine.  You will run the apcupsd as a server on the machine that has the UPS physically attached with the USB or serial cable.  Any other machines that are powered by the UPS will run as clients that talk over the local LAN to the apcupsd running as a server.  This is the network shutdown scenario.

Each physical UPS you have connected via serial or USB must have a completely separate server apcupsd installation if they all connect physically to the same machine.  I have a head node on a cluster that has two UPSes plugged in via USB.  I just modified the USB mapping to always identify the UPSes separately.  This lets you have more than one UPS controlled by a single machine running multiple apcupsd installations.  The install directory for apcupsd is a compile time directive via configure so you do have to compile from scratch to get this feature.

The clients are the simplest since you have a simple config file for them.  The apcupsd docs have examples of the config files and explain it all very well.  All you need for them is that they are hooked up via a LAN connection.  All the nodes in my cluster talk to the head node to find out every 60 secs if the power is okay or if they need to start shutting down.
Best wishes,
Dow


-----Original Message-----
>From: Trey Sizemore <trey at fastmail.fm>
>Sent: Dec 31, 2006 12:32 AM
>To: ale at ale.org
>Subject: Re: [ale] APC UPS and linux
>
>On Sat, 30 Dec 2006 19:36:44 -0500
>danverde <danverde at comcast.net> wrote:
>
>> On Saturday 30 December 2006 6:52 pm, Trey Sizemore wrote:
>> > I've recently purchased an APC UPS (BackUPS XS 1500) for use with a
>> > few servers I have here at home and a desktop.  I understand
>> > there's an apcupsd package that can be installed.
>> >
>> > I assume I can just plug the power cords of the machines into the
>> > UPS, hook the USP cable from the UPS to one of the machines, and
>> > then install apcupsd on that machine, correct?
>> >
>> > Is there any sort of GUI for monitoring?
>> 
>> I have been using a 1500 for a while now.  It works great with
>> apcupsd.
>> 
>> gapcmon is the gui.
>> 
>> http://gapcmon.sourceforge.net/
>> 
>> You will have to make sure that you get the config files for apcupsd
>> setup correctly.  
>> 
>> be sure and set:
>> UPSCABLE usb
>> 
>> and
>> 
>> UPSTYPE usb
>> DEVICE  # this is blank
>> 
>> 
>> 
>> Dan
>
>Must apcupsd be installed on each machine the the UPS will serve or
>only one?  Also, is the USB connection from the UPS only required to
>connect to one machine?
>
>-- 
>Cheers,
>Trey
>----
> 
>Q:  Why do ducks have flat feet?
>A:  To stamp out forest fires.
>
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>A:  To stamp out flaming ducks.
> 
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