Date of the switchover: 28th June 2021 - before we switch over we have to make sure that:
* Replication codfw -> eqiad is running
** [x] s1
** [x] s2
** [x] s3
** [x] s4
** [x] s5
** [x] s6
** [x] s7
** [x] s8
** [x] x1
** [x] x2
** [x] es4
** [x] es5
** [x] pc1
** [x] pc2
** [x] pc3
[x] Check and disable GTID on codfw masters for the above sections. T284897#7174224
[x] Check that all codfw slaves have GTID enabled T284897#7172371
[x] Check which notifications are disabled for codfw hosts
[x] Check event scheduler is enabled on codfw hosts
[x] Check that query killers are installed and enabled on codfw hosts
[x] Update section_params in hieradata/common/profile/mariadb.yaml https://gerrit.wikimedia.org/r/c/operations/puppet/+/701335
* Review DB MW weights
** [] s1
** [] s2
** [] s3
** [] s4
** [x] s5
** [x] s6
** [x] s7
** [x] s8
** [x] x1
** [x] x2
** [x] es4
** [x] es5
** [x] pc1
** [x] pc2
** [x] pc3