GlusterFS : Replication Configuration

Configure Storage Clustering with GlusterFS. For example, Create a Replication volume with 3 Nodes. It's possible to create Replication volume with 2 Nodes but it's not recommended because split-brain syndrome maybe happens on [replica 2 volume]. As a countermeasure for split-brain, it is recommended to create volume with more than 3 Nodes or set [arbiter volume]. | +----------------------+ | +----------------------+ | [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 | | node03.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]	Install GlusterFS Server on All Nodes, refer to here.
[2]	Create a Directory for GlusterFS Volume on all Nodes.

root@node01:~#  mkdir -p /glusterfs/replica

[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. # confirm status root@node01:~#  gluster peer status Number of Peers: 2 Hostname: node02 Uuid: f11a43b8-6d3d-4ae7-92ed-1f633699515c State: Peer in Cluster (Connected) Hostname: node03 Uuid: db6c7053-1ac4-4788-b91c-92a73cbb05e3 State: Peer in Cluster (Connected) # create volume root@node01:~#  gluster volume create vol_replica replica 3 transport tcp \ node01:/glusterfs/replica \ node02:/glusterfs/replica \ node03:/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 # confirm volume info root@node01:~#  gluster volume info Volume Name: vol_replica Type: Replicate Volume ID: 58fbcbe4-bf6b-41b9-9a68-55b893ba9580 Status: Started Snapshot Count: 0 Number of Bricks: 1 x 3 = 3 Transport-type: tcp Bricks: Brick1: node01:/glusterfs/replica Brick2: node02:/glusterfs/replica Brick3: node03:/glusterfs/replica Options Reconfigured: cluster.granular-entry-heal: on storage.fips-mode-rchecksum: on transport.address-family: inet nfs.disable: on performance.client-io-threads: off

[4]	To mount GlusterFS volume on Client Hosts, refer to here.