That is the problem that makes geo-clustering very hard to nearly
impossible. You can look at the Booth option for pacemaker, but that
requires two (or more) full clusters, plus an arbitrator 3rd location.
Outside of this though, there really is no way to have geo/stretch
clustering with automatic failover.
digimer
On 05/02/15 03:38 AM, Dmitry Koterov wrote:
Could you please 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.
On Wednesday, February 4, 2015, Andrea <a.bac...@codices.com
<mailto:a.bac...@codices.com>> wrote:
Digimer <lists@...> writes:
>
> That fence failed until the network came back makes your fence method
> less than ideal. Will it eventually fence with the network still
failed?
>
> Most importantly though; Cluster resources blocked while the
fence was
> pending? If so, then your cluster is safe, and that is the most
> important part.
>
Hi Digimer
I'm using for fencing a remote NAS, attached via iscsi target.
During network failure, for example on node2, each node try to fence
other node.
Fencing action on node1 get success, but on node2 fail, because it
can't see
iscsi target(network is down!) .
I thinks it's the reason why node2 doesn't reboot now, because it
can't make
operation on key reservation and watchdog can't check for this.
When network come back, watchdog can check for key registration and
reboot
node2.
For clustered filesystem I planned to use ping resource with location
constraint as described here
http://clusterlabs.org/doc/en-US/Pacemaker/1.0/html/Pacemaker_Explained/ch09s03s03s02.html
If the node can't see iscsi target..then..stop AppServer, Filesystem ecc
But it doesn't works. In the node with network failure i see in the
log that
pingd is set to 0 but Filesystem resource doesn't stop.
I will continue testing...
Thanks
Andrea
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Digimer
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What if the cure for cancer is trapped in the mind of a person without
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