TLDR: We are upgrading deployment servers, both physical hardware
(older R430-> newer R440) and OS version (stretch->buster) 
What happened so far:
Today we switched the deployment server and scap master for codfw from
deploy2001 to deploy2002. 
What happens next:
On Monday, March 1st, we want to switch the deployment server and scap
master for eqiad from deploy1001 to deploy1002. 
The window is "20:00–22:00 UTC # 12:00–14:00 PST" after the morning
backport window for up to 2 hours. In this time you won't be able to
Do you have to do anything?
If you connect to "deployment.eqiad.wmnet" the host key will change,
you can use the scripts to update host keys though and the
fingerprints are also on wiktech on new (and protected) pages. 
Yes, you'll have to retrain muscle memory to switch to deploy1002,
sorry for that but it's just a new generation every couple of years
and this way we can also fall back to something if needed. In return
you should get more performance from the new hardware.
No, you don't need to worry about losing data in your home dir,
everything has been rsynced over straight into /home on these hosts.
Let us know if you have any questions,
Daniel & Mukunda
Daniel Zahn <dzahn(a)wikimedia.org>