Could you pleas<span></span>e give a hint: how to use fencing in case the nodes are all in different geo-distributed datacenters? How people do that? Because there could be a network disconnection between datacenters, and we have no chance to send a stonith signal somewhere. <br><br>On Wednesday, February 4, 2015, Andrea <<a href="mailto:a.bacchi@codices.com">a.bacchi@codices.com</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Digimer <lists@...> writes:<br>
<br>
><br>
> That fence failed until the network came back makes your fence method<br>
> less than ideal. Will it eventually fence with the network still failed?<br>
><br>
> Most importantly though; Cluster resources blocked while the fence was<br>
> pending? If so, then your cluster is safe, and that is the most<br>
> important part.<br>
><br>
Hi Digimer<br>
<br>
I'm using for fencing a remote NAS, attached via iscsi target.<br>
During network failure, for example on node2, each node try to fence other node.<br>
Fencing action on node1 get success, but on node2 fail, because it can't see<br>
iscsi target(network is down!) .<br>
I thinks it's the reason why node2 doesn't reboot now, because it can't make<br>
operation on key reservation and watchdog can't check for this.<br>
When network come back, watchdog can check for key registration and reboot<br>
node2.<br>
<br>
For clustered filesystem I planned to use ping resource with location<br>
constraint as described here<br>
<a href="http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/ch09s03s03s02.html" target="_blank">http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/ch09s03s03s02.html</a><br>
If the node can't see iscsi target..then..stop AppServer, Filesystem ecc<br>
<br>
But it doesn't works. In the node with network failure i see in the log that<br>
pingd is set to 0 but Filesystem resource doesn't stop.<br>
<br>
I will continue testing...<br>
<br>
Thanks<br>
Andrea<br>
<br>
<br>
<br>
<br>
<br>
<br>
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