add all nodes in /etc/hosts

Ports
 

111 - portmap/rpcbind
24007 - GlusterFS Daemon
24008 - GlusterFS Management
38465 to 38467 - Required for GlusterFS NFS service
24009 to +X - GlusterFS versions earlier than 3.4
49152 to +X - GlusterFS versions 3.4 and later
Each brick for every volume on the host requires its own port. For every new brick, one new port will be used starting at 24009 for GlusterFS versions earlier than 3.4 and 49152 for version 3.4 and later.

For example, if you have one volume with two bricks, you must open 24009-24010 or 49152-49153.
 

Install packages

yum install centos-release-gluster310.noarch

yum install parted lvm2 xfsprogs glusterfs glusterfs-fuse glusterfs-server
 

to exclude from updates 

grep ^exclude /etc/yum.conf
exclude=kernel* gluster*
 

on all nodes

pvcreate /dev/sdb ( make sure same size on all nodes? )
vgcreate vgglus1 /dev/sdb
lvcreate -l 100%VG -n gbrick1 vgglus1
mkfs.xfs -i size=512 /dev/vgglus1/gbrick1

echo '/dev/vgglus1/gbrick1 /opt/gvol1 xfs inode64,nobarrier 0 0' >> /etc/fstab

mkdir gvol1
mount glvol1
 

on node 1

mkdir /opt/gvol1/brick1


on node 2

mkdir /opt/gvol1/brick2


Start glusterd 

systemctl enable glusterd
systemctl start glusterd


Build a peer group

from node1:  gluster peer probe glus2 ; gluster peer status
from node2:  gluster peer probe glus1 ; gluster peer status


Verify the status of the pool

gluster pool list


Create a replicated volume

gluster volume create gvol1 replica 2 transport tcp glus1:/opt/gvol1/brick1  glus2:/opt/gvol1/brick2
gluster volume start gvol1


get volume info

gluster volume info gvol1


export with nfs ( watch status before, is it by default? )

gluster volume stop gvol1
gluster volume set gvol1 auth.allow 192.168.100.*
gluster volume set gvol1 nfs.disable off
gluster volume set gvol1 nfs.addr-namelookup off
gluster volume set gvol1 nfs.export-volumes on
gluster volume set gvol1 nfs.rpc-auth-allow 192.168.100.*
gluster volume start gvol1

gluster volume info gvol1