One of the things that helped me quite a bit With the CentOS stuff was that I created a VM with agent/management server running in it. I set up a 4.0 system with an advanced zone, pulled down the source code into it, and then took a copy of the VM. Then I ran through the upgrade process 10 or 15 times, testing, making note of what was missing, rolling back and then trying again, slowly building a patch for the cloud.spec. With the database upgrade and everything else that needs to be done, it's really hard to roll back a real environment and try the upgrade again from scratch.
At this point upgrading CentOS is just installing the new RPMs along with a few new dependencies, restarting the services, and restarting the system vms so they get upgraded software. Your e-mail has prompted me to want to create a wiki though, in case anything goes wrong, unless upgrade notes will be released somewhere in particular. Just a place to put upgrade tips like "Old configs will be moved from /etc/cloud to /etc/cloud.rpmsave" in case something does need to be moved manually by the admin. On Sat, Mar 30, 2013 at 6:17 AM, Wido den Hollander <w...@widodh.nl> wrote: > Hi, > > I've started a Wiki[0] to describe the upgrade process going from 4.0 to 4.1 > with Ubuntu packages. > > Since the packages got renamed from cloud-* to cloudstack-* a lot has > changed and some manual intervention is required. > > The Wiki is work-in-progress while I'm upgrading one of my 4.0 clusters to > 4.1 and see how it all works out. > > Feel free to change the Wiki if you find something that needs to be > adressed! > > Wido > > [0]: > https://cwiki.apache.org/confluence/display/CLOUDSTACK/Ubuntu+upgrade+process >
