Since parse2001 is a canary server and has no traffic, I suggest we use it to test at least the buster installation and check if everything is in order. I understand that if the work are doing for the upgrading the appservers/api mediawiki servers, we do not expect many surprises here.
ParsoidJS is not in use anymore, so this is a chance to remove it from the servers as well
- try to have finished reimaging parse2001 to buster
- run some tests
- reimage scandium, testing setup
- remove parsoidJS from production
- reimage codfw
- reimage eqiad