[ClusterLabs] Minimal metadata for fencing agent

Ken Gaillot kgaillot at redhat.com
Fri Aug 5 10:25:28 EDT 2016

On 08/05/2016 06:16 AM, Maciej Kopczyński wrote:
> Thanks for your answer Thomas and sorry for messing up the layout of
> messages - I was trying to write from a mobile phone using gmail... I
> was able to put something up using what I found on the web and my own
> writing. My agent seems to do what it has to, except for sending
> proper metadata. I found the following information: "Output of
> fence_agent -o metadata should be validated by relax-ng schema
> (available at fence/agents/lib/metadata.rng)." Checked this location,
> but I am totally noob regarding to XML. There is a pretty extensive
> structure there, and what I need is to prepare a minimal agent to be
> used locally by me just to check if the whole thing makes sense at
> all.
> Do you have any idea as to what is the minimal set of XML data that
> fence agent has to send to stdout? Or any way to work around this?
> Just for testing purposes.

The easiest thing to do is to look at an existing fence agent and mimic
what it does. The key parts are what parameters the agent accepts, and
what actions it supports.

> Best regards,
> Maciek
>> Hi,
>> That is because pcs doesn't work well with external stonith agents, see
>> this github issue https://github.com/ClusterLabs/pcs/issues/81
>> Regards,
>> Tomas
>>> Thanks!
>>> I ran into more problems though. When configuring a stonith resource using
>>> pcs with stonith:external/libvirt I am geeting "Unable to create resource
>>> (...), it is not installed on this system." I have installed cluster_glue
>>> RPM package (I am running Cent OS), the file is present in the system,
>>> should I enable it somehow for pacemaker?
>>> Thanks,
>>> Maciek
>>>> Hello,
>>>> Sorry if it is a trivial question, but I am facing a wall here. I am
>>>> trying
>>>> to configure fencing on cluster running Hyper-V. I need to modify source
>>>> code for external/libvirt plugin, but I have no idea which package
>>>> provides
>>>> it, cannot Google any files, do you have any idea?
>>>> Thanks in advance,
>>>> Maciek
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