cat /etc/glusterfs/glusterfs-server.vol
Server
volume brick
  type storage/posix
  option directory /home/glustertest
end-volume

volume server
  type protocol/server
  subvolumes brick
  option transport-type tcp/server     # For TCP/IP transport
  option client-volume-filename /etc/glusterfs/glusterfs-client.vol
  option auth.ip.brick.allow *
end-volume

Client
cat /etc/glusterfs/glusterfs-client.vol
volume client
  type protocol/client
  option transport-type tcp/client
  option remote-host 10.8.3.215
  option remote-subvolume brick
end-volume