[Linux-cluster] GFS locks wnen a node fails

Hal hal_bg at yahoo.com
Thu Jul 26 18:35:46 UTC 2007


I have fixed the problem a week ago :)
The problem was that GNBD server was not a cluster node.
10x anyway!

--- Benjamin Marzinski <bmarzins at redhat.com> wrote:

> On Fri, Jul 20, 2007 at 01:39:13AM -0700, Hal wrote:
> > Hallo everybody,
> > I have a test cluster of 4 machines. node0 - gnbd server and gnbd fence
> server
> > and 3 nodes to mount gfs. The problem is that when I unplug one of the
> nodes,
> > gfs locks and no one can access it until the node is reconnected. 
> > 
> > How can this lock be avoided if one node fails? 
> > How can I tell that gnbd-fencing is working at all?
> > 
> > "gnbd_import -c node0" says nothing even if I do "fence_node node2" I
> assume 
> > fencing is not working am I right?
> 
> To check fencing, you can to a
> # gnbd_import -s <node_to_fence> -t <server_to_fence_from>
> # gnbd_import -c <server_you_fenced_from>
> 
> This will show the banned list on the server. The fenced node should be
> there.
> The node will remain on the panned list until it is manually unfenced, or
> until the gnbd module is reloaded, and it reimports devices from the server.
>  
> > Regards 
> > Hal
> > 
> > 
> >        
> >
>
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