dejanmm at fastmail
Nov 6, 2009, 1:02 AM
Post #4 of 4
(178 views)
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Re: Using a mangeable switch as a fencing device
[In reply to]
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Hi,
On Thu, Nov 05, 2009 at 07:58:35PM +0100, Arnaud Gomes-do-Vale wrote:
> Hi,
>
> Dejan Muhamedagic <dejanmm[at]fastmail.fm> writes:
>
> > Such fencing is not currently supported, i.e. all our stonith
> > plugins support various power management devices. That doesn't
> > mean that it's not possible to implement this kind of plugin.
>
> Thanks for your answer.
>
> I am aware of the currently supported STONITH devices. I guess what I
> wanted to know is, is it possible to develop such a fencing plugin? As
> far as I can tell, there is nothing in the current infrastructure that
> would prevent this plugin from working, is there?
No. The rules are simple: http://wiki.linux-ha.org/STONITH
though in this case the required RESET command obviously won't
make much sense.
> It does not look particularly difficult if one has some time to write
> the plugin properly, but I may be underrating things a bit here (as in:
> I am a sysadmin, not a coder, and I am not very good at assessing the
> difficulty of writing this kind of tool). I might give it a try if I can
> find some time, but I can't guarantee I will end up with anything
> usable.
I think that you mentioned that the switch supports telnet
sessions. There are already two plugins implemented in Python
(external/ibmrsa-telnet and external/dracmc-telnet) which may
be a good starting point.
Thanks,
Dejan
> --
> Arnaud
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