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GlusterFS : Replication Setting2019/01/17

Configure GlusterFS Storage Cluster.
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] | || [GlusterFS Server#2] |
|   +----------+----------+   |
|                      |                     |                      |
+----------------------+                     +----------------------+

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.
[2] Create a Directory for GlusterFS Volume on all Nodes.
node01:~ #
mkdir -p /glusterfs/replica

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

node01:~ #
gluster peer probe node02

peer probe: success.
# show status

node01:~ #
gluster peer status

Number of Peers: 1

Hostname: node02
Uuid: fa0c1a0c-9738-4554-8ac8-cd84f1de72af
State: Peer in Cluster (Connected)

# create volume

node01:~ #
gluster volume create vol_replica replica 2 transport tcp \
node01:/glusterfs/replica \

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

node01:~ #
gluster volume start vol_replica

volume start: vol_replica: success
# show volume info

node01:~ #
gluster volume info

Volume Name: vol_replica
Type: Replicate
Volume ID: 4cb84fdf-421d-4b26-8ee4-da1d28598b99
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Brick1: node01:/glusterfs/replica
Brick2: node02:/glusterfs/replica
Options Reconfigured:
transport.address-family: inet
nfs.disable: on
performance.client-io-threads: off
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