Bionic Beaver upgrade

#1

We’ve proposed to hold off on the upgrades to Ubuntu 18 (Bionic Beaver) until after the v2 rollout, in Q3/Q4. We can start thinking about the logistics of it now though.

We currently manage 12 servers across 8 countries and will be adding a new one soon. Upgrading the OS on each of those servers could be done in 2 ways:

Upgrade via migration: for each server we create a new one, set it up from scratch with a fresh Ubuntu 18 image, then migrate and shut down the old one. I think this is considered best practise?

In-place upgrades: for each server, we schedule brief downtime and upgrade the server via apt.

Doing this for 12 or 13 servers will take a lot of time and resources with the first method, and a lot less with the second method.

Are there any more pros and cons to consider?

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