sudo pt-config-diff --defaults-file /root/.my.cnf h=db2144.codfw.wmnet h=db2142.codfw.wmnet

sudo cookbook sre.hosts.downtime --hours 1 -r "Primary switchover x2 T334821" 'A:db-section-x2'

sudo dbctl instance db2142 set-weight 0
sudo dbctl config commit -m "Set db2142 with weight 0 T334821"

This didn't work and I had to use orchestrator: sudo db-switchover --replicating-master --timeout=25 --only-slave-move db2144 db2142

sudo cumin 'db2144* or db2142*' 'disable-puppet "primary switchover T334821"'

!log Starting x2 codfw failover from db2144 to db2142 - T334821

sudo db-switchover --replicating-master --skip-slave-move db2144 db2142
echo "===== db2144 (OLD)"; sudo db-mysql db2144 -e 'show slave status\G'
echo "===== db2142 (NEW)"; sudo db-mysql db2142 -e 'show slave status\G'

sudo dbctl --scope codfw section x2 set-master db2142
sudo dbctl config commit -m "Promote db2142 to x2 primary T334821"

sudo cumin 'db2144* or db2142*' 'run-puppet-agent -e "primary switchover T334821"'

sudo db-mysql db2142 heartbeat -e "delete from heartbeat where file like 'db2144%';"
sudo db-mysql db1151 heartbeat -e "delete from heartbeat where file like 'db2144%';"

events_coredb_master.sql on the new primary db2142
events_coredb_slave.sql on the new slave db2144

sudo dbctl instance db2144 set-candidate-master --section x2 true
sudo dbctl instance db2142 set-candidate-master --section x2 false
(dborch1001): sudo orchestrator-client -c untag -i db2142 --tag name=candidate
(dborch1001): sudo orchestrator-client -c tag -i db2144 --tag name=candidate

sudo db-mysql db1115 zarcillo -e "select * from masters where section = 'x2';"

sudo dbctl instance db2144 depool
sudo dbctl config commit -m "Depool db2144 T334821"

sudo dbctl instance db2144 edit