GlusterFS 7 : Replication Configuration2020/05/05 |
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]. |
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[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 the node [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: f7dbd6bb-1628-4ddf-b71f-5e50b72f9766 State: Peer in Cluster (Connected) Hostname: node03 Uuid: 106993f4-8481-4558-9faf-0b90a665eaa0 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: 6f9fdea8-e3f6-4894-9eae-05dc82f670de 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: transport.address-family: inet storage.fips-mode-rchecksum: on nfs.disable: on performance.client-io-threads: off |
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