[Pacemaker] IPMI Stonith

[Adrian Chapela]

Dejan Muhamedagic escribió:
> 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.
>   
OK, they used the lights-out interface... 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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>
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