[Linux-cluster] Xen / Redhat cluster : 5.3 to 5.4 upgrade question and best practice
dist-list at LEXUM.UMontreal.CA
Wed Feb 10 22:31:21 UTC 2010
I need to upgrade a Xen cluster using RH servers from 5.3 to 5.4.
It is a 3 nodes cluster (+qdisk) and 1 luci server for management.
All VM are in a GFS2 FS in /home/domU/FQDN folders.
Each FQDN folder contains :
-The xen config file
-the VM FQDN.img file
I read about some issues with rgmanager from 5.4 (unable to create VM config files that were not in /etc/xen). This bug has been fixed in rgmanager-2.0.52-1.el5_4.1
Can I safely apply the update without modifying any config made with 5.3 ? Do I need to tweak the cluster.conf between 5.3 and 5.4 ?
Is it better to upgrade the luci server before the nodes ?
I am also curious about the nodes, what is the best practice : moving VM , removing the node from the cluster, upgrading and then reboot, see if everything is fine and go for the next one after that ? Can I stay with a mix of 5.3 and 5.4 for several days ?
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