Order of operations:
- With the precondition that T376150 is complete, we should have a pool of codfw hosts that can serve existing wdqs-internal traffic. Eqiad needs to be depooled at the dns level and codfw needs to have any hosts that aren't the 5 chosen in T376150 depooled.
- Take the old eqiad and codfw wdqs-internal hosts offline to reconfigure them as necessary for the new graph split
- Bring hosts back online
- Return the 5 codfw hosts in T376150 to wdqs full graph service.
- Tear down the old wdqs-internal service completely, set up eqiad lvs for wdqs-internal-[main,scholarly]