[rt-users] 3.8.2 to 4.2.3 Upgrade

[Emmanuel Lacour]

On Mon, Mar 24, 2014 at 01:31:58PM -0000, Jim Tambling wrote:
>    Hi
> 
>     
> 
>    I am planning to upgrade our RT instance and move it to a virtual machine.
>    As I want to keep RT downtime to a minimum, I plan to install RT 3.8.2 on
>    the new VM, import the database and settings from the current instance and
>    then proceed with the upgrade. Is this the best way to do it? Can you guys
>    offer any suggestions?
> 


the way I do:

- setup a new VM (often 3.8 RT instances are running on old OS ;))
- install stock RT 4.2.3
- apply back your patch, plugins, ...
- import current DB, measure time needed
- run upgrade, measure time needed
- test
- if everything is ok, plan the real upgrade:
  - stop mail/http on prod server
  - dump/restore on new server
  - run upgrade
  - start mail/http on new server
  - test
  - play with dns/ip to make the new server be the production one


this way you can safely do the upgrade, test, and now exactly the
downtime to plan.


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