Сервис OCFS2

nodeN# apt install ocfs2-tools

nodeN# cat /etc/ocfs2/cluster.conf
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
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
...
O2CB_ENABLED=true
...
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
...
#/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
nodeN# systemctl daemon-reload

nodeN# mount /disk3