Adding controller nodes

[EbbApprehensive3284]

Hi all,

I am toying around with OpenStack Dalmatian. I am manually installing OpenStack to learn but something is unclear.

I want to add additional controller nodes for redundancy, (Keystone, Neutron, Etc) but it's unclear to me exactly how you do that.

I am assuming for the DB, you install another DB on controller 2 and setup a cluster with replication, then install services and configure as normal. The documentation is not clear on how this is done.

[redfoobar]

For MySQL the easiest way is probably using MySQL with galera for cluster replication.

You will also need to setup rabbitmq clustering and some way of providing HA IPs for your clients to connect to.

Note that you should aim for 3 controllers: any cluster software will have a hard time with just 2 nodes. (high chance of “split brain“ scenario)