Upgrade cyrus 2.4.17 to 2.4.18 on Ubuntu

[Marcus Schopen]

Hi,

I have to upgrade an internal Ubuntu 14.04 LTS with cyrus 2.4.17 to
Ubuntu 16.04 LTS, which comes with cyrus 2.4.18. Is there anything to
consider when upgrading from cyrus 2.4.17 to 2.4.18 (beside good
backup)? Cyrus runs as replica (master/slave). Probably it makes sense
to shut down the slave during the master upgrade and vice versa?
Downtimes are no problem.

Is there actually a way to check whether master and slave are on the
same state?

And are there any cyrus 3.x packages available for Ubuntu 16.04 or
18.04 LTS. Even Ubuntu 18.04 LTS comes with an old 2.5 cyrus version?

Cioa
Marcus