[Pacemaker] Low cost stonith device

[Johan Verrept]

Hello guys,

   I completed the RA and have attached it. As far as I can tell it is
fully functional but I would appreciate it if someone "in the know"
would take a look and gave me some feedback.

Thank you,

	Johan Verrept

On Fri, 2009-10-02 at 11:04 +0200, Johan Verrept wrote:
> Hi,
> 
> in the meantime I got the device and am working on a RA. I will need
> permission to post it here, so no promises. The telnet access can't
> manage the ports but there is a documented cgi-based interface. 
> For now, I am pretty happy with the device.
> 
> 	J.
> 
> On Fri, 2009-09-25 at 11:14 +0200, Johan Verrept wrote:
> > 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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> > > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > 
> > 
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> 
> 
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