Ubuntu 20.04
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GlusterFS : Dispersed Configuration
2020/08/26
 
Configure Storage Clustering with GlusterFS.
For example, Create a Dispersed volume with 6 Nodes.
Dispersed Volumes is based on Erasure Coding (EC).
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#1] |10.0.0.51 | 10.0.0.54| [GlusterFS Server#4] |
|   node01.srv.world   +----------+----------+   node04.srv.world   |
|                      |          |          |                      |
+----------------------+          |          +----------------------+
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#2] |10.0.0.52 | 10.0.0.55| [GlusterFS Server#5] |
|   node02.srv.world   +----------+----------+   node05.srv.world   |
|                      |          |          |                      |
+----------------------+          |          +----------------------+
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#3] |10.0.0.53 | 10.0.0.56| [GlusterFS Server#6] |
|   node03.srv.world   +----------+----------+   node06.srv.world   |
|                      |                     |                      |
+----------------------+                     +----------------------+

 
It is strongly recommended to use partitions for GlusterFS volumes that are different from the / partition.
On this example, it shows settings on the environment that all nodes has [sdb1] and mount it to [/glusterfs].
[1]
[2] Create a Directory for GlusterFS Volume on all Nodes.
root@node01:~#
mkdir -p /glusterfs/dispersed

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

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.
root@node01:~#
gluster peer probe node05

peer probe: success.
root@node01:~#
gluster peer probe node06

peer probe: success.
# confirm status

root@node01:~#
gluster peer status

Number of Peers: 5

Hostname: node01.srv.world
Uuid: 6e19ea98-d7e2-4ee3-b402-11dcf95be673
State: Peer in Cluster (Connected)

Hostname: node02
Uuid: f1c4ce91-1b08-45f7-84e7-6549a85071fd
State: Peer in Cluster (Connected)

Hostname: node03
Uuid: 075c4737-17fb-4476-9668-02dab9315d85
State: Peer in Cluster (Connected)

Hostname: node04
Uuid: 1a80e3a9-c07d-4bf1-a008-ab208a6c1196
State: Peer in Cluster (Connected)

Hostname: node06
Uuid: 1d7cbd06-eccd-4f5b-8edc-62b1806c89e1
State: Peer in Cluster (Connected)

# create volume

root@node01:~#
gluster volume create vol_dispersed disperse-data 4 redundancy 2 transport tcp \
node01:/glusterfs/dispersed \
node02:/glusterfs/dispersed \
node03:/glusterfs/dispersed \
node04:/glusterfs/dispersed \
node05:/glusterfs/dispersed \
node06:/glusterfs/dispersed

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

root@node01:~#
gluster volume start vol_dispersed

volume start: vol_dispersed: success
# confirm volume info

root@node01:~#
gluster volume info


Volume Name: vol_dispersed
Type: Disperse
Volume ID: 52ffa13e-c4d1-41b3-9039-c84037c839cd
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (4 + 2) = 6
Transport-type: tcp
Bricks:
Brick1: node01:/glusterfs/dispersed
Brick2: node02:/glusterfs/dispersed
Brick3: node03:/glusterfs/dispersed
Brick4: node04:/glusterfs/dispersed
Brick5: node05:/glusterfs/dispersed
Brick6: node06:/glusterfs/dispersed
Options Reconfigured:
transport.address-family: inet
storage.fips-mode-rchecksum: on
nfs.disable: on
[4]
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