Intro
We want to move from oresrdb hosts to redis::misc hosts to lower
operational costs. We will stop maintaining separate redis databases and
better utilize the under utilized redis::misc databases
https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/595167/ will achieve that but will require some one time orchestration for this.
Process in pseudocode
- disable puppet on ores1* and ores2*
- set in all hosts /etc/hosts to have oresrdb.svc.eqiad.wmnet point to the old oresrdb host
- merge puppet change https://gerrit.wikimedia.org/r/#/c/operations/puppet/+/595167/
- merge puppet/private puppet change for the password
- merge DNS change https://gerrit.wikimedia.org/r/#/c/operations/dns/+/601665
- Run the equivalent of the following in cumin commands
for host in hosts
depool host
delete /etc/hosts line
enable puppet
run puppet
restart celery
restart uwsgi
pool
done