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Re: [PATCH] Power control

Bill Peck bpeck@redhat.com
Fri, 29 Jun 2007 13:30:58 -0700 (PDT)


Christopher Fowler wrote:
I did this a while back with our version of 7.X. Instead of it
executing an external power command it send a message to a daemon that
was responsible for chatting with various power strips. The problem
with supporting different vendors of strips is that they each have their
own access method.
Yes, I'm using our fence scripts from our cluster product to do the work of talking to the different power strips. Did you ever post your patches for inclusion? I just want power control from conserver and to not have to maintain a patch going forward. :-)

The powerd daemon was responsible for knowing what
strip was on what serial power and would char with the strip to execute
the power command.  To the user it was off,on,and reboot.  Regardless if
you were using APC, Baytech, etc.  As long as powerd had support for
that model of strip then you could control it via conserver.

I did add a feature that would make sure that the user had R/W on the
console and power control capability on the console.  If not they were
sent a message from conserver that they did not have sufficient rights
to control power on that device.

Being able to control power from console is an amazing benefit.  I've
used it many times to rescue systems in trouble.