This task will track the swapping of the PDU tower(s) in rack A3-eqiad.
The current PDU tower is malfunctioning, with a short having caused issues on both side B (wholly offline) and parts of side a (one circuit group of outlets has defunct outlets.)
Chris has onsite spares (2 dual-wide PDU towers with 48 ports per side) to test out and use for replacement in this rack.
== Maintenance Window Scheduling ==
Primary Date: Thursday, 2019-01-17 @ 07:00 EST (12:00 GMT)
Backup Date: Tuesday, 2019-01-22 @ 07:00 EST (12:00 GMT)
Estimated Duration: Up to 2 hours
=== Maintenance Window Checklist ===
The following steps must be met for this swap:
 - all servers will need to be taken offline and powered down for the duration of the migration
 - old pdu must be removed from the rack, new pdu installed, all power migrated over to it
The side B of A3-eqiad may also have had the circuit breaker tripped during the failure, and may require Equinix technicians to flip the breaker in the EQ circuit breaker box.
== Servers & Devices in A3-eqiad ==
The following items are in a3-eqiad: https://netbox.wikimedia.org/dcim/racks/3/
Servers (grouped by service owner when possible):
db1103 - we need to depool and stop mysql before the maintenance
db1127 - not in use
dbproxy1001 - standby host
dbproxy1002 - standby host
dbproxy1003 - needs to be failed over to dbproxy1008
dbstore1003 - not in use
pc1004 - not in use, should be decommissioned (T210969)
radium - tor relay
@robh synced with @Eevans about these. restbase 1016 is already offline. the other restbase systems can be logged into via SSH and cleanly shutdown just before the maintenance, and then powered back up normally post window.