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OpenStack Cloud Computing Cookbook Second Edition by Cody Bunch, Kevin Jackson

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Using Galera for MySQL clustering

OpenStack can be backed by a number of database backends, and one of the most common options is MySQL. There are a number of ways to make MySQL more resilient and highly available. The following approach uses a load balancer to front a multi-read/write master with Galera, taking care of the synchronous replication required in such a setup. Galera is a synchronous multi-master cluster for MySQL InnoDB databases. Galera clusters allow synchronous data writes across all nodes with any node being able to take that write in a fully active/active topology. It features automatic node management, meaning that failed nodes are removed from the cluster and new nodes are automatically registered. The advantage of this is ...

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