[Linux-HA] 4 node cluster - quorum/stonith

[Alan Robertson]

Joseph Smith wrote:
> Hello list!
> 
> I am setting up a 4 node cluster. Each node in the cluster runs a webserver. 
> If 1 or more go down I want the remaining to take over. I have this working 
> fine, unless more than 1 go down and I lose quorum.
> 
> I understand for this to work I need to use stonith. I am a little lost on how 
> I should set this up. Here is my current cib.xml:

It's not quite like that...

With quorum enabled, STONITH is still a good thing - even without shared 
storage.

If you want to disable quorum, then you really ought to think about 
using STONITH.  If you have any kind of shared data in the cluster, then 
this is highly recommended.  If it's really shared storage (like 
FiberChannel), then it's mandatory (whether or not you enable quorum).

So, it's a little softer than that, and the cause and effect is a little 
different than you described.

To get it to run when only 1 node is up, then you MUST disable quorum.


-- 
     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