[Linux-cluster] fencing problem in 2 node cluster using apc fence device

[garylua at singnet.com.sg]

Hi Lon,

No problem. Thanks for the reply. I've found out how to enable the power on function already on my Sun x4200 server. Apparently, it's in BIOS under Chipset-> Southbridge setting.

However, I have another query regarding fencing. Is it common practice for a node to be fenced when i do a manual failover? For example, i have an application running on node1. I do a "drag and drop" of the application from node1 to node2 at the cluster configuration interface, causing my application to failover to node2. In this case, is it necessary to fence up node1? If so, how do i go about doing it?

Right now, I can only see fencing kicks in when i down the network on node1. Is there any other situation when i need to fence node1? In other words, do i need to fence node1 every time my application fails over to node2? Thanks in advance!


--- Lon Hohberger <lhh at redhat.com> wrote:

> On Fri, 2006-08-18 at 12:29 +0800, garylua at singnet.com.sg wrote:
> > Hi,
> > 
> > Aother update on the situation: Apparently, i got the fencing
> working already. When I down the ethernet connection of node1, node2
> will fence node1 and the power outlet connected to node1 power cycle
> (switch off then on). However, is this the proper behaviour of
> fencing? I wish to reboot node1, not shut it down completely. Seems
> that my machines are configured in such a way that when the power
> supply is switched on and then off, my machine stays off. Is there
> any way which i can alter this behaviour such that my node1 will
> reboot instead of shutting down? Thanks!
> 
> 
> Yes, it's usually in the BIOS -- sorry for the late reply!
> 
> -- Lon
> 
>