[Pacemaker] IPMI Stonith

[Dejan Muhamedagic]

Hi,

On Tue, Jan 20, 2009 at 04:14:00PM +0100, Adrian Chapela wrote:
> Dejan Muhamedagic escribi?:
> > Hi,
> >
> > On Mon, Jan 19, 2009 at 08:00:50PM +0100, Adrian Chapela wrote:
> >   
> >> Hello!
> >>
> >> I am thinking again on the stonith. IPMI could be an option, but is it 
> >> really a good option for production ? What happen if the network break 
> >> down ?
> >>     
> >
> > You need to provide different paths for the heartbeat and
> > connection to the ipmi devices.
> >
> > Also, make your power supply resilient: if a node loses power,
> > the ipmi device will be dead too, and your cluster will wait
> > forever for the fencing to succeed.
> >   
> Ok, but what about a kernel panic ? when the OS hungs up the other node 
> can't know what is happening on the node that is hunged up. I am 
> thinking on this situation.

The state of host OS doesn't influence the ipmi (lights-out)
device. As long as the node has power and the network connection
to the ipmi device works, you should be ok.

Thanks,

Dejan

> Of course the two node will have RAID, 
> redundant network (with bonding) and redundant power supplies but there 
> is an option to have a split brain with a node hunged up, what do you 
> think about this ?
> >   
> >> Is totally resolved the split brain ? Have you tested with HP 
> >> Proliant Servers ?
> >>     
> >
> > I think that people use ipmi with proliants.
> >
> > Thanks,
> >
> > Dejan
> >
> >   
> >> Thank you!
> >>
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> >>     
> >
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> >   
> 
> 
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