I have gone with the second approach on all of my hardware/software upgrades. As another poster mentioned, if you have multiple servers this should be pretty easy. My AFS servers are dedicated to AFS and run no other services. When it comes time to do OS upgrades I would rather wipe my disks clean and install from scratch so generally, I just bring the target machine down after moving all of the volumes off of it to one of the other servers and then install the OS and install the AFS software all with original network settings.
Erik
-----Original Message-----
From: Yuji Shinozaki [mailto:[EMAIL PROTECTED]]
Sent: Thursday, December 17, 1998 6:30 PM
To: [EMAIL PROTECTED]
Subject: Changing server hardware.
We are looking to "upgrade" the hardware on one of our AFS servers (a
fileserver, volserver and ptserver). In other words we have a better CPU
which we would like to substitute for one of our current servers.
We see two approaches to this upgrade:
Bring the new hardware up as a new server, update CellServDB everywhere,
force elections, migrate volumes from the old server to the new server,
bring down the old server, update CellServDB, force new elections and be
off and running.
OR
Bring the old server down, copy all its information to the new hardware,
assign the same IP and bring it back up as if it were the same old server.
The server in question has some read-write and readonly volumes. The disk
containing the vice partitions are on separate disks, so they are easily
moved from the old to the new server intact.
The second approach seems simpler, but are there pitfalls? Does the
server only identify itself to the other servers and clients by its IP
address? Is there some host authentication info that we have to be
careful about migrating ? We are running kerberos 5, if that makes any
difference (no kaserver to worry about), so we would probably be
generating new K5 host principals ( or should we try to maintain the
old ones on the new server?)...
Could someone outline their method of doing this? Any gotchas in store
for us?
yuji
----
Yuji Shinozaki Systems Administrator
[EMAIL PROTECTED] Dept of Physics and Astronomy
http://www.physics.unc.edu Univ. of North Carolina - CH
(919)962-7214 (voice) CB 3255 Philips Hall
(919)962-0480 (fax) Chapel Hill, NC 27599
