galera/server/database/grafana.yml

parameters:
  mysql:
    server:
      database:
        grafana:
          encoding: utf8
          users:
          - name: grafana
            password: ${_param:mysql_grafana_password}
            host: '%'
            rights: all
          - name: grafana
            password: ${_param:mysql_grafana_password}
            host: ${_param:cluster_local_address}
            rights: all