[ClusterLabs] Pacemaker not always selecting the right stonith device

Andrei Borzenkov arvidjaar at gmail.com
Thu Jul 21 12:40:58 EDT 2016

19.07.2016 18:24, Klaus Wenninger пишет:
> On 07/19/2016 04:17 PM, Ken Gaillot wrote:
>> On 07/19/2016 09:00 AM, Andrei Borzenkov wrote:
>>> 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= 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?
>> You're right -- if not told otherwise, Pacemaker will query the device
>> for the target list. In this case, the output of "stonith_admin -l"
>> suggests it's not returning the desired information. I'm not familiar
>> with the external agents, so I don't know why that would be. I
>> mistakenly assumed it worked similarly to fence_ipmilan ...
> guess it worked at the times when pacemaker did fencing via
> cluster-glue-code...
> A grep for "gethosts" doesn't return much for current pacemaker-sources
> apart
> from some leftovers in cts.

Pacemaker is expected to call fence_legacy which translates "list" into
"gethosts". It does it in my case. So it appears a problem of this
specific installation.

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