[Engineering] The codfw deployment server is Naos

[Riccardo Coccioli]

= TL;DR
- The codfw deployment server is now Naos: naos.codfw.wmnet [1]. Its
SSH fingerprints are available at [2].
- Mira is no longer a deployment server.
- Naos is also the current active deployment server until May 3rd [3], [4].
- As always, please use the DNS record deployment.eqiad.wmnet to know
which deployment server is the active one.


= Detailed version:
Few days before the datacenter switchover to codfw performed last week
[3], [4], with perfect timing, the existing codfw deployment server
Mira manifested hardware issues.
Being Mira an old server, also out of warranty, a new deployment
server in the codfw datacenter was deployed and configured.

As a result, from now on, the deployment server for the codfw
datacenter is Naos: naos.codfw.wmnet [1]. You can find its SSH
fingerprints in [2].

As part of the datacenter switchover procedures [4], also the
deployment server was switched to codfw, hence Naos is currently the
active deployment server, until the switchback to eqiad as master
datacenter, scheduled on May 3rd [3], [4].
The DNS entries for both deployment.eqiad.wmnet and
deployment.codfw.wmnet always point to the active deployment server
and should be used to verify which one is the active one.

As always, a large message of the day (MOTD) is shown to alert people
to not use the passive deployment server on login, and it is now shown
on both Tin and Mira.

I've also updated all the references to Mira that I've found on
Wikitech, but please verify if you have any direct reference to it
that might need to be updated.

Thanks,
Riccardo

[1] https://wikitech.wikimedia.org/wiki/Naos
[2] https://wikitech.wikimedia.org/wiki/Help:SSH_Fingerprints/naos.codfw.wmnet
[3] https://blog.wikimedia.org/2017/04/18/codfw-temporary-editing-pause/
[4] https://wikitech.wikimedia.org/wiki/Switch_Datacenter

-- 
Riccardo Coccioli
Software Engineer, Technical Operations
Wikimedia Foundation