[ClusterLabs] Pacemaker not always selecting the right stonith device

[Andrei Borzenkov]

On Tue, Jul 19, 2016 at 4:52 PM, Ken Gaillot <kgaillot at redhat.com> wrote:
...
>>
>> primitive p_ston_pg1 stonith:external/ipmi \
>>  params hostname=pg1 ipaddr=10.148.128.35 userid=root
>> passwd="/var/vcap/data/packages/pacemaker/ra-tmp/stonith/PG1-ipmipass"
>> passwd_method=file interface=lan priv=OPERATOR
>>
...
>
> These constraints prevent each device from running on its intended
> target, but they don't limit which nodes each device can fence. For
> that, each device needs a pcmk_host_list or pcmk_host_map entry, for
> example:
>
>    primitive p_ston_pg1 ... pcmk_host_map=pg1:pg1.ipmi.example.com
>
> Use pcmk_host_list if the fence device needs the node name as known to
> the cluster, and pcmk_host_map if you need to translate a node name to
> an address the device understands.
>

Is not pacemaker expected by default to query stonith agent instance
(sorry I do not know proper name for it) for a list of hosts it can
manage? And external/ipmi should return value of "hostname" patameter
here? So the question is why it does not work?