I just inherited a old single-server Zimbra 8.0.6 installation running on 64-bit CentOS 6.5. Being both the OS and Zimbra so old, I plan to update at the next maintenance window. However I would like to first do a reality-check asking on the forum.
I read the guide here (I can't find anything 8.8 specific) and my current plan is to:
- stop all mail flow;
- update the OS via yum and reboot;
- stop again all mail flow;
- upgrade Zimbra to the latest release (8.8.6 at time of writing this post).
The entire upgrade cycle will be preceded by a snapshot of the virtual machine on which it runs, as well by a lab-testing on a dedicated machine.
Can I ask:
- is my plan sound, or flawed?
- is upgrading the OS first a good choice?
- there is something to take into account when performing the upgrade (ie: common pitfall which should be avoided)?
Thank you all.