We should have a master and a proper master candidate for failover with STATEMENT based replication, not replicating ROW to sanitarium, and physically separated from the original master.
* [x] s1
** master: db2048
** candidate: db2055
* [x] s2
** master: db2035
** candidate: db2041
* [x] s3
** master: db2043
** candidate: db2057
* [x] s4
** master: db2051
** candidate: db2058
* [x] s5
** master: db2052
** candidate: db2038
* [x] s6
** master: db2039
** candidate: db2046
* [x] s7
** master: db2040
** candidate: db2047
* [x] s8
** master: db2045
** candidate: db2079
* [] x1
** master: db2034
** candidate: db2069 (T191275#4099560) (this is the only available candidate, as db2033 has a faulty BBU, so it will need to be replaced at some point once we start the movements on codfw - T184888)