Debian 9 Stretch
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GlusterFS : Replication Setting
2017/06/21
 
Configure Storage Clustering.
For example, create a Replication volume with 2 servers.
This example shows to use 2 servers but it's possible to use more than 3 servers. 
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#1] |10.0.0.51 | 10.0.0.52| [GlusterFS Server#2] |
|   node01.srv.world   +----------+----------+   node02.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 [/var/lib/glusterfs] directory for GlusterFS Configuration on all Nodes.
[1]
Install GlusterFS Server on All Nodes, refer to here.
[2] Create a Directory for GlusterFS Volume on all Nodes.
root@node01:~#
mkdir -p /var/lib/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.
# show status

root@node01:~#
gluster peer status 

Number of Peers: 1

Hostname: node02
Uuid: a39156f3-32cb-451e-9e34-08ce504d72bb
State: Peer in Cluster (Connected)
# create volume

root@node01:~#
gluster volume create vol_replica replica 2 transport tcp \
node01:/var/lib/glusterfs/replica \
node02:/var/lib/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: 3691681b-6fb7-4c38-b636-5f7993eb1f61
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: node01:/var/lib/glusterfs/replica
Brick2: node02:/var/lib/glusterfs/replica
Options Reconfigured:
transport.address-family: inet
performance.readdir-ahead: on
nfs.disable: on
[4] If use NFS mount from Clients, Start required services first and also configure like follwos.
root@node01:~#
gluster volume set vol_replica nfs.disable off

volume set: success
[5]
To mount GlusterFS volume on clients, refer to here.
 
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