Hi all,
I have a few CentOS servers that I want to mirror live, to be standby spares. The "spare" machines could be either a different machine (with a different motherboard), or a VM in Vmware server.
I've used rsync in the past, which works well for doing it while the machine is live. However, I want the destination to be running different hardware, and have a different IP address assigned to the nic. My goal is to rsync everything -except- the files that pertain to the network interface, and the file system mount points.
My process is this: 1. Install Centos on "spare" machine, configure for proper ethernet. 2. Rsync from live to spare, excluding files pertaining to NIC and FS.
Then if it needs to go live, I simply change the IP address, and I'm off and running.
The question is: what do I exclude? I know /etc/sysconfig/network-scripts/, /etc/fstab, and /etc/modules*, but what else? I think there may be some stuff in /var also that deals with raid, etc. The live computer is running software raid, while the backup will not.
Bob