Toolserver:Admin:Haproxy

haproxy is a TCP load-balancing daemon; it accepts connections and routes them to an appropriate server. It is used to distribute MySQL connections to an appropriate database.

haproxy runs on the HA cluster in /global/misc/haproxy. The cluster resource group and resource are both called haproxy-sql. To configure it, edit /global/misc/haproxy/haproxy.conf, then do clrs disable haproxy-sql; clrs enable haproxy-sql. Note that at the moment, this will disconnect all MySQL clients; there should be a nicer way to do this soon.