GlusterFS 10 on Ubuntu 20.04

glusterfs-ubuntu-20.04

3 glusterfs server + 1 client.
On all 4 nodes:

apt install software-properties-common
add-apt-repository ppa:gluster/glusterfs-10

glusterfs-server:
apt update && apt install glusterfs-server

glusterfs-client:
apt update && apt install glusterfs-client

On all 4 nodes:
systemctl enable --now glusterd
systemctl status glusterd
Add every node in /etc/hosts all the 4 server.

Any server node:
gluster peer status
gluster peer probe gluster(1,2,3)
gluster volume list

Make the volume space, eg.:
mkdir /gluster
gluster volume create volume1 replica 3 gluster1:/gluster/brick1 gluster2:/gluster/brick1 glusterN:/gluster/brick1
gluster volume list
gluster volume info
gluster volume start volume1

Mount on client node:
mkdir /mnt/gluster
mount -t glusterfs gluster1:volume1 /mnt/gluster  (You can mount from any gluster(1,2,3) node)