Upgrading 6.x ZCS

[Labsy]

Hi,
I know there must be already lots of posts and maybe wiki instructions on how to upgrade Zimbra, but to sumarise again, please, can somebody confirm upgrade steps:
- first BACKUP at least /opt/zimbra
- then my first dilema:
o to use web Admin interface
o or to use CLI terminal
- after getting newest version (in my case 6.0.3 upgraded to 6.0.6), just run ./install.sh and relax

1.) Will all my settings be preserved?
2.) Must I manually stop Zimbra MTA before I begin?
3.) Will SSL certificate remain in place and be used in upgraded version?
4.) Any post-upgrade tasks?
5.) Any other precautions?
6.) If upgrade fails or gets broken, then I only restore /opt/zimbra from backup and everything is back as it was?

It's my only Zimbra install and it is production, so better to be safe then sorry.

Thank you.

[Dirk]

Backup /opt/zimbra at the console with something like

sudo cp -rp /opt/zimbra /opt/zimbrabackup

ideally take this backup with Zimbra stopped.
Lauch the install as root or sudo it and run that with Zimbra running.
The installer will take care of all the exiting settings, just make sure to answer YES to the question of "Do you want to upgrade"

If it goes badly wrong, just stop the zimbra services and switch the backup in

mv /opt/zimbra /opt/zimbraBroken
mv /opt/zimbrabackup /opt/zimbra

[Krishopper]

For what its worth, moving the zimbra backup back to /opt doesn't replace the RPM packages, and the Zimbra installer scripts may think that it is still upgraded - so you may want to check the wiki for backup/restore on how to properly recover that if something goes wrong.

[Labsy]

Great, thanx!
I'll try it today, making a snapshot of (stopped) ZCS before I begin to ba on the safe side.