[Analytics] Druid upgrade - Thu 25th 11 AM CEST

[Luca Toscano]

Hi everybody,

the Analytics team will upgrade the Druid cluster behind Superset/Turnilo
(druid100[1-3]) to version 0.12.3 on Thursday 25th at 11AM CEST. At the
same time, we'll upgrade Turnilo to version 1.8.1. Since it will be a
rolling upgrade, you shouldn't see a major impact but possibly sporadic
failures while maintenance will be ongoing.

Tracking tasks:
- Druid https://phabricator.wikimedia.org/T206839
- Turnilo https://phabricator.wikimedia.org/T197276

Please let us know on IRC or email or Phabricator if this is going to
impact you.

Thanks!

Luca