system/keystone/server/storage/glusterfs.yml

classes:
- service.glusterfs.server
- service.glusterfs.client
parameters:
  glusterfs:
    server:
      peers:
      - ${_param:cluster_node01_address}
      - ${_param:cluster_node02_address}
      - ${_param:cluster_node03_address}
      volumes:
        keystone-keys:
          storage: /srv/glusterfs/keystone-keys
          replica: 3
          bricks:
            - ${_param:cluster_node01_address}:/srv/glusterfs/keystone-keys
            - ${_param:cluster_node02_address}:/srv/glusterfs/keystone-keys
            - ${_param:cluster_node03_address}:/srv/glusterfs/keystone-keys
          options:
            cluster.readdir-optimize: On
            nfs.disable: On
            network.remote-dio: On
            diagnostics.client-log-level: WARNING
            diagnostics.brick-log-level: WARNING
    client:
      volumes:
        keystone-keys:
          path: /var/lib/keystone/fernet-keys
          server: ${_param:glusterfs_service_host}
          user: keystone
          group: keystone
  keystone:
    server:
      tokens:
        location: /var/lib/keystone/fernet-keys