[Pacemaker] IPMI Stonith

[Adrian Chapela]

Lars Marowsky-Bree escribió:
> On 2009-01-20T17:21:39, Adrian Chapela <achapela.rexistros at gmail.com> wrote:
>
>   
>> It is accessed over lan, you need a server with "IPMI over LAN" like 
>> Integrated Lights-Out from HP, most known as iLo ( 
>> http://h18013.www1.hp.com/products/servers/management/ilo/ ). iLo has a 
>> network port that you can use to control a server remotely.
>>
>> I think a good way (if the server are near...) could be use a cross-over 
>> ethernet wire.
>>     
>
> Cross-over of course doesn't work for more than 2 nodes ;-)
>   
Yes, I know thank you.
> Usually, having the IPMI device on one of the cluster LANs suffices.
>
> You need two failures for the cluster to freeze then: the IPMI LAN going
> down, _and_ a node failure/additional network failure. 
>
> As the HA cluster tends to only protect against single failures (it is
> usually very possible to construct a scenario of two failures which
> bring down the entire cluster), that guarantee still holds.
>
> It's all a question of paranoia of course, but k-fault-tolerance for k >
> 1 is really quite difficult in the general case, even though special
> cases (ie, a 5 node cluster can tolerate 2 node failures) is possible.
>   
I will try this option and I will posts results as soon as possible.

Thank you!
>
> Regards,
>     Lars
>
>