metadata/galera/service/master/cluster.yml

applications:
- galera
parameters:
  _param:
    galera_server_cluster_name: galeracluster
    galera_server_bind_address: 0.0.0.0
    galera_server_bind_port: 0.0.0.0
    galera_server_admin_user: root
    galera_server_admin_password: root
  galera:
    master:
      enabled: true
      name: ${_param:galera_server_cluster_name}
      bind:
        address: ${_param:galera_server_bind_address}
        port: ${_param:galera_server_bind_port}
      admin:
        user: ${_param:galera_server_admin_user}
        password: ${_param:galera_server_admin_password}