Install GlusterFS to Configure Storage Cluster.
It is strongly recommended to use partitions for GlusterFS volumes that are different from the / partition.
On this example, it is based on the environment that all nodes has [sdb1] and mount it to [/glusterfs].

[1] Install GlusterFS Server on all Nodes in Cluster.

root@glus01:~# apt -y install glusterfs-server
root@glus01:~# systemctl enable --now glusterd
root@glus01:~# gluster --version
glusterfs 7.2
Repository revision: git://git.gluster.org/glusterfs.git
Copyright (c) 2006-2016 Red Hat, Inc. <https://www.gluster.org/>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
It is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3
or later), or the GNU General Public License, version 2 (GPLv2),
in all cases as published by the Free Software Foundation.

That’s OK, Refer to the next section to Configure Cluster.