In T190568 we want to upgrade Phabricator servers to stretch.
In order to upgrade the eqiad server, phab1001, we would have to take production Phabricator down because we can't failover to codfw. (That is blocked on lack of database cluster in codfw, T137928 is open)
To avoid downtime for Phab users and avoid risk that something goes wrong with the stretch upgrade, let's instead bring up phab1002 with stretch, test, switch over and then upgrade phab1001 and go back.
As suggested by Moritz on T190568#4230710 this is a request to take mw1298 and rename it since the hardware specs are pretty close.