Daemon Configuration

We’re doing our best to keep cantal working without any configuration. But for achieving complex tast we need some configuration.

Important command-line options:

1. Enable cluster setup --cluster-name=your-name. Name must be the same on all nodes in the cluster (i.e. all nodes which should see each other)
2. Keep some metrics for restart --storage-dir=/var/lib/cantal. In clustered setup this also stores list of peers, so that if all the nodes are restarted simultaneously, they discover each other

Cluster Setup

Another piece of cluster setup is: introduce nodes to each other:

curl http://some.known.host:22682/add_host.json -d '{"addr": "1.2.3.4:22682"}'

This only works if cluster-name matches and after nodes are able to interchange ping-pong packets between each other (also machine-id must be different which is usually provided by the system).