MMM (Multi-Master Replication Manager for MySQL) is a set of flexible scripts to perform monitoring/failover and management of MySQL master-master replication configurations.
The MMM toolset also has the ability to read balance standard master/slave configurations with any number of slaves, so you can use it to move virtual IP addresses around a group of servers depending on whether they are behind in replication.
You can find detailed installation instructions here http://mysql-mmm.org/mmm2:guide
License: GNU General Public License v2
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