Ubuntu 18.04
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GlusterFS : Distributed + Replication
2018/06/22
 
Configure GlusterFS Storage Cluster.
For example, create a Distributed + Replication volume with 4 servers.
                                  |
+----------------------+          |          +----------------------+
| [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 | 10.0.0.54| [GlusterFS Server#4] |
|   node03.srv.world   +----------+----------+   node04.srv.world   |
|                      |                     |                      |
+----------------------+                     +----------------------+

 
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.
[1]
[2] Create a Directory for GlusterFS Volume on all Nodes.
root@node01:~#
mkdir /glusterfs/dist-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.
root@node01:~#
gluster peer probe node04

peer probe: success.
# show status

root@node01:~#
gluster peer status

Number of Peers: 3

Hostname: node02
Uuid: aac88f72-3cf6-4bf8-a9d5-4347d7a8040c
State: Peer in Cluster (Connected)

Hostname: node03
Uuid: 98463881-f7b9-4b04-8c56-b68cc47f9501
State: Peer in Cluster (Connected)

Hostname: node04
Uuid: 58fd4c09-005f-4b73-835f-2bf4213dfa2d
State: Peer in Cluster (Connected)

# create volume

root@node01:~#
gluster volume create vol_dist-replica replica 2 transport tcp \
node01:/glusterfs/dist-replica \
node02:/glusterfs/dist-replica \
node03:/glusterfs/dist-replica \
node04:/glusterfs/dist-replica

volume create: vol_dist-replica: success: please start the volume to access data
# start volume

root@node01:~#
gluster volume start vol_dist-replica

volume start: vol_dist-replica: success
# show volume info

root@node01:~#
gluster volume info


Volume Name: vol_dist-replica
Type: Distributed-Replicate
Volume ID: 7da2ac9c-f9f0-4a09-a2c3-b3f3c1f2b584
Status: Started
Snapshot Count: 0
Number of Bricks: 2 x 2 = 4
Transport-type: tcp
Bricks:
Brick1: node01:/glusterfs/dist-replica
Brick2: node02:/glusterfs/dist-replica
Brick3: node03:/glusterfs/dist-replica
Brick4: node04:/glusterfs/dist-replica
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
performance.client-io-threads: off
[4]
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