[Pacemaker] Low cost stonith device

[Johan Verrept]

Hi guys,

When I looked into this yesterday , I found this device:

	http://www.aviosys.com/ip_power_9258hp.html

At around 150 euro, it is pretty cheap. It is an independent device and
will not do nifty things like server console access (like the IPMI
cards) but it should work well for stonith purposes (over-featured,
actually). There is an even cheaper version but for a cluster I kinda
like the sound of "High grade components and extreme durability" ;).
I also like that it is independently powered so if the PSU of a server
fails, the stonith device will still work (and the cluster won't block).

I have one ordered and will write an RA for it as soon as I get it. The
device claims telnet access so it should not be hard to do.

Regards,

   Johan

PS: there are others too in this category of devices:
http://www.server-rack-online.com/cw-2h2-c20.html for about the same
price ($225), but with less power ports.


On Thu, 2009-09-24 at 16:24 -0600, Remi Broemeling wrote:
> Hi Mario -- I was just looking into this myself, today.  I think the
> lowest cost that you'll be able to find is an IPMI card for your
> motherboard (as long as the motherboard in question supports it).  To
> find out you'll need to look into your specific model of motherboard
> and see what is needed (or even if it is possible).  IPMI cards aren't
> foolproof and have their own problems; but it's better than nothing, I
> would think.
> 
> I think that your idea for fencing at the switch would be workable;
> but how exactly to accomplish that would depend on the switch that you
> were talking about; as the commands (and even if external ability to
> do so is available) would be switch/manufacturer-dependent.
> 
> Of course even lower cost (but even more problematic) is simply using
> external/ssh to shutdown the server to be killed, as that should be
> free.
> 
> See here for more documentation on STONITH:
> http://www.clusterlabs.org/mediawiki/images/f/f2/Crm_fencing.pdf
> 
> Mario Giammarco wrote: 
> > Hello,
> > 
> > Can you suggest me a list of stonith devices compatible with 
> > pacemaker?
> > 
> > I need a low cost one.
> > 
> > I have also another idea to build a low cost stonith device:
> > 
> > I have intelligent switches. To stonith a node I can send to
> >  a switch the command 
> > to turn off all ethernet ports linked to the node to be fenced. 
> > 
> > So the node is powered on but it cannot do any harm because 
> > it is disconnected 
> > from network.
> > 
> > Is it a good idea? How can I implement it?
> > 
> > Thanks in advance for any help.
> > 
> > Mario
> >   
> -- 
> 
> Remi Broemeling
> Sr System Administrator
> 
> Nexopia.com Inc.
> direct: 780 444 1250 ext 435
> email: remi at nexopia.com
> fax: 780 487 0376 
> 
> www.nexopia.com
> 
> I like you. You remind me of when I was young and stupid.
> Things you would love to say at work but can't
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