advanced event handlers

[Carroll, Jim P [PCS]]

Many years ago I recall reading about some trivial plans which could
enable one to write a tiny script, monitor the serial port which has
a home-built relay plugged into it.  Assuming that the system had
a battery backup, the relay would be connected to a power outlet.
When the outlet power would stop, the relay would trip, thus
permitting the script to follow through to running the shutdown
command.

It would seem possible that if you could use the appropriate pins
on a serial port and connect them to a similar capacity (power-wise)
relay, you could have it disable power to the cable modem for 10
seconds.  Once you have that hardware and that script, connecting
it to Nagios should be trivial.  This means you get to play the
role of engineer, so be careful that you don't underestimate your
load requirements.

Food for thought.

Disclaimer:  If you try this out and something breaks, you get to
keep all the pieces.  This includes (but is not limited to) starting
an electrical fire.

jc

> -----Original Message-----
> From: newsletters [mailto:newsletters at atcomputerconsulting.com]
> Sent: Friday, September 05, 2003 12:52 PM
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] advanced event handlers
> 
> 
> I am interested in doing some low level trouble resolution with event
> handlers.
> 
> More specifically, today my cable modem crapped out and it 
> needed to be
> power cycled.  So I am interested in using nagios pings to figure out
> where the problem is and start rebooting things.  I can 
> easily reboot the
> firewall as it's running linux.  But the cable modem is going to be
> tougher.  I don't think there is a way I can remote to it and 
> power cycle.
>  So.......
> 
> Using something like X10 to bouce an outlet.  We have APC 
> master switches
> here at work and I have just started thinking about writing 
> some php code
> to bounce a switch if I need, but does anybody know how this might be
> accomplished on the cheap???
> 
> Thanks!
> Andy
> 
> 
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