Fedora 31
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GlusterFS 7 : Add Nodes (Bricks)
2019/11/18
 
Add Nodes (Bricks) to existing Cluster.
For example, Add a Node [node03] to the existing Cluster like follows.
                                  |
+----------------------+          |          +----------------------+
| [GlusterFS Server#1] |10.0.0.51 | 10.0.0.52| [GlusterFS Server#2] |
|   node01.srv.world   +----------+----------+   node02.srv.world   |
|                      |          |          |                      |
+----------------------+          |          +----------------------+
           ⇑                      |                      ⇑
     file1, file3 ...             |               file2, file4 ...
                                  |
+----------------------+          |
| [GlusterFS Server#3] |10.0.0.53 |
|   node03.srv.world   +----------+
|                      |
+----------------------+

[1]
Install GlusterFS to a New Node, refer to here, and then Create a directory for GlusterFS volume on the same Path with other Nodes.
[2] Add a New Node to existing Cluster on a node. (OK on any existing node)
# probe new node

[root@node01 ~]#
gluster peer probe node03

peer probe: success.
# confirm status

[root@node01 ~]#
gluster peer status

Number of Peers: 2

Hostname: node02
Uuid: 3cbd2aba-e265-4992-a391-bc6851096728
State: Peer in Cluster (Connected)

Hostname: node03
Uuid: 3346d1a3-643e-40c2-9605-1e3cb4c1daee
State: Peer in Cluster (Connected)

# confirm existing volume

[root@node01 ~]#
gluster volume info


Volume Name: vol_distributed
Type: Distribute
Volume ID: 15c21e2b-5603-4bd6-8ca6-93aa838995bf
Status: Started
Snapshot Count: 0
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: node01:/glusterfs/distributed
Brick2: node02:/glusterfs/distributed
Options Reconfigured:
transport.address-family: inet
storage.fips-mode-rchecksum: on
nfs.disable: on

# add new node

[root@node01 ~]#
gluster volume add-brick vol_distributed node03:/glusterfs/distributed

volume add-brick: success
# confirm volume info

[root@node01 ~]#
gluster volume info


Volume Name: vol_distributed
Type: Distribute
Volume ID: 15c21e2b-5603-4bd6-8ca6-93aa838995bf
Status: Started
Snapshot Count: 0
Number of Bricks: 3
Transport-type: tcp
Bricks:
Brick1: node01:/glusterfs/distributed
Brick2: node02:/glusterfs/distributed
Brick3: node03:/glusterfs/distributed
Options Reconfigured:
transport.address-family: inet
storage.fips-mode-rchecksum: on
nfs.disable: on

# after adding new node, run rebalance volume

[root@node01 ~]#
gluster volume rebalance vol_distributed fix-layout start

volume rebalance: vol_distributed: success: Rebalance on vol_distributed has been started successfully. Use rebalance status command to check status of the rebalance process.
ID: 4c8732c1-b68c-4984-9853-e929a16aa6bd
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