[Pacemaker] Stonith Device APC AP7900

[Dejan Muhamedagic]

Hi,

On Thu, Nov 18, 2010 at 06:45:01AM +0200, Chris Picton wrote:
>
>
> On 2010/11/18 1:01 AM, Andrew Daugherity wrote:
>>>>> In production I am planning to have 2 separate AP7900 units each plugged
>>>>> into 2 different APC UPS units to achieve that.  I would then have the
>>>>> single node name on each, for each of the 2 PS's on the individual
>>>>> systems.
>>> ...
>>>
>>> Right, there's currently no way to do a simultaneous reset on two
>>> distinct fencing devices.
>>
>> There is one possible solution to this -- the APC switched PDUs do
>> support being configured in multicast groups, and you can configure
>> groups of outlets together, even spanning several PDUs.  For example you
>> could say PDU 1, outlet 1 and PDU 2, outlet 3 are known as "webserver1",
>> and then tell it to "power cycle webserver1".  If it's not already
>> supported by the stonith agent it shouldn't be too hard to add it --
>> APC's syntax is actually documented fairly well.
>>
>> The obvious disclaimer is that I haven't tried this myself.  I do have a
>> similar setup, but decided it was easier to use the IPMI stonith agent
>> (external/ipmi) to control my servers.
>>
>
> I have 'solved' this problem in two ways:
> 1. I have a pdu fencing script which accepts multiple ip addresses as  
> parameters - it instructs all pdus to turn off the relevant ports

Sounds good. Does it also work with multiple outlets?

> 2. I have also created a stonith_multi script which is a wrapper which  
> calls multiple stonith devices - in its current incarnation, this only  
> requires success from a single device, but is could easily be modified  
> to require success from all devices.

How/where did you store the configuration?

If you want to contribute your stonith agents, post them to the
linux-ha-dev list.

Thanks,

Dejan

> Let me know if either of those sound useful to you, and I can forward  
> them on.
>
> Chris
>
>
>
>
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