01-23-2014 08:03 PM - last edited on 01-25-2014 04:59 PM by maikoro
We have a 2 node 11.20 ServiceGuard Cluster
I am about to change only the subnet mask of one of the configured network .
(The subnet will remain the same only the mask changes.)
I am not sure whether I need to halt the cluster in 11.20 . If halt is needed then do I need to reapply the Cluster configuration . Because no where in the cluster and package configurtion I can see that subnet mask has been mentioned.
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01-24-2014 06:31 AM
I would recommend shutting down the cluster. Changing the subnet mask will require networking to be stopped and restarted, which would affect your cluster.
In a test cluster I have, the package control script does mention the subnet mask. In our definition:
02-05-2014 01:12 PM
Serviceguard A.11.20 knows the netmask of the NICs identified in the cluster binary file.
# cmviewcl -v -f line | grep netmask
In order for Serviceguard to update the cluster binary file with the new netmask, you must comment the _IP reference from the cluster ASCII configuration file, cmapplyconf the update (online ok), then re-add the IP. Note that Serviceguard will reject this if the indicated IP is the sole Heartbeat_IP.
Also note that /etc/rc.config.d/netconf must be updated and actions of the NIC should be quiesced during the transistion.