Re: Zimbra 6 to 8 upgrade path.

[Adam Cody <ajcody@zimbra.com>]

food for thought, wrote this up a little while ago:

http://wiki.zimbra.com/wiki/Ajcody-Notes-OS-Upgrade-And-ZCS-Options

Note - my personal wiki page, not official wiki.

Adam

----- Original Message -----
> That's pretty much what we're doing here.  ZCS 7.2.1 upgrade is tomorrow for
> us....
> 
> ----- "Nathan" <lagern@lafayette.edu> wrote:
> 
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> > Hello Zimbra-hied-admins.
> > 
> > I'm in the process of trying to plan out a zimbra 6.0.10 to zimbra 8
> > upgrade. I realize that updating directly to 8 from 6 is not
> > supported, which is only half of my problem.
> > 
> > I have two hurdles to overcome, one being supported OS, the next
> > being
> > the zimbra version.
> > 
> > 
> > I wanted to run an idea i've had regarding a possible upgrade path
> > past some other zimbra experts.
> > 
> > Here's the state we're currently in:
> > 
> > Zimbra 6.0.10 multi-server install, spanning 9 blades. All of which
> > are due for renewal.
> > Running on RHEL5.
> > 
> > Zimbra 8 does not list rhel5 as a supported OS.
> > 
> > Because we're planning on replacing our blades with the same upgrade,
> > I thought i might try to work an OS upgrade, migration to new
> > hardware, and a zimbra upgrade all into 1.
> > 
> > My plan follows:
> > 
> > Build new machines to host zimbra. On RHEL6. Virtualize as much as
> > possible. We'd like to move to a 100% virtualized zimbra environment.
> > Which is a point i'd like others to weigh in on as well. What sort of
> > success have others had virtualizing all components of Zimbra?
> > 
> > Install Zimbra 6.0.10 on the new systems, and join them to our
> > existing multi-server install. Retire our smtp and proxy blades at
> > this point, as the new virtualized proxy and smtp machines should be
> > taking over.
> > 
> > Migrate accounts from our three old store blades, to the new store
> > VM's using zimbra's built-in migration functions.
> > 
> > Retire the old store blades as the new virtual store servers are
> > handling all of the load.
> > 
> > All that's left to deal with at this point are the ldap servers. We
> > have two zimbra ldap blades, i'll need to replicate ldap, and then
> > promote one of the new virtual ldap servers to master i suppose. Then
> > retire the old ldap servers.
> > 
> > At this point, we should have a fully virtual zimbra 6.0.10
> > multi-server install, with all of our users on the new systems. At
> > this point, i'd step through the zimbra upgrade process. Upgrade
> > 6.0.10 to 7.2.x, and then from 7.2.x to 8.x.
> > 
> > Does this sound like a sane upgrade path? Is there something simpler
> > i'm overlooking?
> > 
> > Thanks!
> > - --
> > - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> > Nathan Lager, RHCSA, RHCE (#110-011-426)
> > System Administrator
> > 11 Pardee Hall
> > Lafayette College, Easton, PA 18042
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