CentOS 7
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GlusterFS 6 : Replication Configuration2019/05/30
 
Configure Storage Clustering with GlusterFS.
For example, create a Replication volume with 3 Nodes.
It is recommended to use partitions for GlusterFS volumes which are different from the / partition.
The environment on this example is set as that sdb1 is mounted on [/glusterfs] directory for GlusterFS Configuration on all Nodes. 
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#1] |10.0.0.51 | 10.0.0.52| [GlusterFS Server#2] |
|   node01.srv.world   +----------+----------+   node02.srv.world   |
|                      |          |          |                      |
+----------------------+          |          +----------------------+
                                  |
+----------------------+          |
| [GlusterFS Server#3] |10.0.0.53 |
|   node03.srv.world   +----------+
|                      |
+----------------------+
[1]
Install GlusterFS Server on All Nodes, refer to here.
[2] Create a Directory for GlusterFS Volume on all Nodes.
[root@node01 ~]#
mkdir -p /glusterfs/replica

[3] Configure Clustering like follows on a node. (it's OK on any node)
# probe the node

[root@node01 ~]#
gluster peer probe node02

peer probe: success.
[root@node01 ~]#
gluster peer probe node03

peer probe: success.
# show status

[root@node01 ~]#
gluster peer status 

Number of Peers: 2

Hostname: node02
Uuid: 39b0be1e-6b67-48d3-9e24-08f356fea9ae
State: Peer in Cluster (Connected)

Hostname: node03
Uuid: 4a5ada8c-f0b7-4aff-ad4d-c42f1f0ef4a0
State: Peer in Cluster (Connected)
# create volume

[root@node01 ~]#
gluster volume create vol_replica replica 3 transport tcp \
node01:/glusterfs/replica \
node02:/glusterfs/replica \
node03:/glusterfs/replica

volume create: vol_replica: success: please start the volume to access data
# start volume

[root@node01 ~]#
gluster volume start vol_replica

volume start: vol_replica: success
# show volume info

[root@node01 ~]#
gluster volume info 


Volume Name: vol_replica
Type: Replicate
Volume ID: 0649d480-ad8f-4170-b45f-fdb161bfa203
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: node01:/glusterfs/replica
Brick2: node02:/glusterfs/replica
Brick3: node03:/glusterfs/replica
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
performance.client-io-threads: off
[4]
To mount GlusterFS volume on clients, refer to here.
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