====== Сервис OCFS2 ======

  * [[https://habr.com/ru/post/445612/|Кластерное хранилище для небольших web-кластеров на базе drbd+ocfs2]]
  * [[http://xgu.ru/wiki/OCFS2]]
  * [[https://www.oracle.com/us/technologies/linux/ocfs2-best-practices-2133130.pdf|OCFS2 Best Practices Guide]]

<code>
nodeN# apt install ocfs2-tools

nodeN# cat /etc/ocfs2/cluster.conf
</code><code>
cluster:
     node_count = 2
     name = ocfs2

node:
     number = 1
     cluster = ocfs2
     ip_port = 7777
     ip_address = 192.168.X.1
     name = node1

node:
     number = 2
     cluster = ocfs2
     ip_port = 7777
     ip_address = 192.168.X.2
     name = node2
</code><code>
node1# mkfs.ocfs2 -L "DrbdVol" /dev/drbd0

node1# mkfs.ocfs2 -L "CephVol" /dev/mapper/mpatha
  или
node1# mkfs.ocfs2 -L "CephVol" /dev/mapper/360000000000000000e00000000010001

nodeN# cat /etc/default/o2cb
</code><code>
...
O2CB_ENABLED=true
...
</code><code>
nodeN# o2cb register-cluster ocfs2

nodeN# o2cb list-clusters
nodeN# o2cb list-cluster ocfs2

nodeN# systemctl enable o2cb ocfs2
nodeN# systemctl start o2cb ocfs2

nodeN# mkdir /disk3

nodeN# cat /etc/fstab
</code><code>
...
#/dev/drbd0 /disk2 ocfs2 defaults,heartbeat=local 0 0
#/dev/mapper/mpatha /disk3 ocfs2 defaults,heartbeat=local 0 0
/dev/mapper/360000000000000000e00000000010001 /disk3 ocfs2 defaults,heartbeat=local 0 0
</code><code>
nodeN# systemctl daemon-reload

nodeN# mount /disk3
</code>