[Linux-HA] Question regarding the stonith resources

[Alan Robertson]

Peter Kruse wrote:
> Andrew Beekhof wrote:
>> On 10/31/05, Peter Kruse <pk at q-leap.com> wrote:
>>
>> really?
>> surely there is a way to say (for each stonith resource) "i can shoot
>> node X, Y and Z" no?
> 
> The parameters for the apcmastersnmp I found are:
> ipaddr, port and community.  I guess the plugin
> can find out the outlet names, which are the nodenames.
> But it is not clear what happens if it cannot
> find an outlet name it expected to find...
> 
>>> right, can it happen that the DC shoots itself but doesn't succeed
>>> and the other node still takes over?
>>
>> no - if its still around - then its still the DC
> 
> Ah!  so it's implicit:  if it succeeds, then it's gone
> and the other node can take over, if it doesn't then
> you get an error.  But that also means per default
> success is assumed.  "gone" in the above statement
> is defined as "loss of communications", right?
> Ok, that sounds reasonable as the communications
> are redundant and losing all communications is
> at least a double failure which is not covered...
> Guess I can live with that if I haven't overseen anything...


It's simpler than that.  If a node dies, all resources it owns are 
considered to have been stopped.

If it doesn't die (according to heartbeat), then you can'trestart its 
resources, because they're still running.


-- 
     Alan Robertson <alanr at unix.sh>

"Openness is the foundation and preservative of friendship...  Let me 
claim from you at all times your undisguised opinions." - William 
Wilberforce