Hosts to retire:
* db1029
* db1031
* Ops steps
** [x] All system services confirmed offline from production use (MySQL is now stopped)
** [x] Set all icinga checks to maint mode/disabled while reclaim/decommmission takes place.
** [x] Remove system from all lvs/pybal active configuration
** [x] Any service group puppet/hiera/dsh config removed
** [x] Update site.pp with `role::spare::system` https://gerrit.wikimedia.org/r/#/c/405278/2/manifests/site.pp and https://gerrit.wikimedia.org/r/#/c/401708/3/manifests/site.pp
* DC ops
** [] Disable puppet on host
** [] Remove all remaining puppet references (include `role::spare:system`)
** [] Power down host
** [] Disable switch port
** [] Switch port assignment noted on this task (for later removal)
** [] Remove production dns entries
** [] Puppet node clean, puppet node deactivate
* Decommission
** [] System disks wiped (by onsite)
** [] System unracked and decommissioned (by onsite), update racktables with result
** [] Switch port configration removed from switch once system is unracked.
** [] Mgmt dns entries removed.