Scheduled for 15 February.
Announcement:
> Hello!
>
> Tools DB and Labs Postgres DB will be undergoing maintenance on 15 Feb
> 2017 for about 6 hours starting at 1700 UTC and will be unreachable
> for some of the duration. Most users shouldn't experience issues if
> their code reconnects properly when the server stops accepting
> connections (we'll failover to slaves when doing maintenance). Some
> tables will not be available for a short period of time, but the tool
> owners of those tables have already been notified (see
> https://phabricator.wikimedia.org/T127164 ). We'll try to minimize
> downtime as much as possible.
>
> We will be upgrading the operating system from Ubuntu Precise to
> Debian Jessie in preparation for EOL of Ubuntu Precise (in April
> 2017). We'll also take this opportunity to upgrade Tools DB to Mariadb
> 10.
>
> All data should be preserved in this migration. Follow
> https://phabricator.wikimedia.org/T123731 for more information!
>
> Thanks!
Planning:
* Switchover labsdb1005 to labsdb1004
* Backup labsdb1005 somewhere
* Reimage labsdb1005
* Recover data
* Switchover labsdb1004 back to labsdb1005