Simple MySQL Replication using CoreOS and Percona Galera Cluster

Once you have a working CoreOS environment you should beable to submit the following fleet units to startup and configure your Galera Cluster.

Requirements

• CoreOS or similar base OS
• etcd service
• fleet service
• flannel service

Template needs modification

The file galera@.template should be modified to reflect the proper endpoints you need.

Fleet Units

There are multiple fleet-units

• galera@.service = This starts up the Galera docker container
• galera-announce@.service = Reports to etcd the internal IP

Warning

You really should change the default passwords within galera@.service. I haven't figured out a good way to have ansible or saltstack be the actually process that submits the fleet-units. So for now while I'm testing this is how the password are being done.

If you don't change them thats your call. These are just templates.

Submitting fleet-unit files

Submit the fleet-unit files in the following order.

fleetctl submit galera@.service
fleetctl submit galera-announce@.service  

Start up the first Galera process and its sidekick galera-accounce

fleetctl start galera@01.service
fleetctl start galera-announce@01.service  

fleetctl start galera@02.service
fleetctl start galera-announce@02.service  

fleetctl start galera@03.service
fleetctl start galera-announce@03.service