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o2cb(8)			      OCFS2 Manual Pages		       o2cb(8)

NAME
       o2cb - Cluster registration utility for the O2CB cluster stack.

SYNOPSIS
       o2cb  [--config-file=path]  [-h|--help]	[-v|--verbose]	[-V|--version]
       COMMAND [ARGS]

DESCRIPTION
       o2cb(8) is used to add, remove and list the  information	 in  the  O2CB
       cluster	configuration  file. This utility is also used to register and
       unregister the cluster, as well as start and stop global heartbeat.

       The  default  location  of  the	configuration  file,  /etc/ocfs2/clus‐
       ter.conf, can be overridden using the --config-file option.

OPTIONS
       --config-file config-file
	      Specify  a  path	to the configuration file. If not provided, it
	      will use the default path of /etc/ocfs2/cluster.conf.

       -v, --verbose
	      Verbose mode.

       -h, --help
	      Help.

       -V, --version
	      Show version and exit.

O2CB COMMANDS
       add-cluster cluster-name
	      Adds a cluster to the configuration file. The O2CB configuration
	      file  can	 hold multiple clusters. However, only one cluster can
	      be active at any time.

       remove-cluster cluster-name
	      Removes a cluster from  the  configuration  file.	 This  command
	      removes  all  the	 nodes	and  heartbeat regions assigned to the
	      cluster.

       add-node cluster-name node-name [--ip ip-address] [--port port] [--num‐
       ber node-number]
	      Adds a node to the cluster in the configuration file. It accepts
	      three optional  arguments.   If  not  provided,  the  ip-address
	      defaults to the one assigned to the node-name, port to 7777, and
	      node-number to the lowest unused node number.

       remove-node cluster-name node-name
	      Removes a node from the cluster in the configuration file.

       add-heartbeat cluster-name [uuid|device]
	      Adds a heartbeat region to  the  cluster	in  the	 configuration
	      file.

       remove-heartbeat cluster-name [uuid|device]
	      Removes a heartbeat region from the cluster in the configuration
	      file.

       heartbeat-mode cluster-name [local|global]
	      Sets the heartbeat mode for the  cluster	in  the	 configuration
	      file.

       list-clusters
	      Lists all the cluster names in the configuration file.

       list-cluster cluster-name --oneline
	      Lists  all  the  nodes and heartbeat regions associated with the
	      cluster in the configuration file.

       list-nodes cluster-name --oneline
	      Lists all the nodes associated with the cluster in the  configu‐
	      ration file.

       list-heartbeats cluster-name --oneline
	      Lists  all  the heartbeat regions associated with the cluster in
	      the configuration file.

       register-cluster cluster-name
	      Registers the cluster listed in the configuration file with con‐
	      figfs.   If  called  when	 the cluster is already registered, it
	      will update configfs with the current configuration.

       unregister-cluster cluster-name
	      Unregisters the cluster from configfs.

       start-heartbeat cluster-name
	      Starts global heartbeat on all regions for the cluster as listed
	      in  the configuration file. If repeated, it will start heartbeat
	      on new regions and  stop	on  regions  since  removed.  It  will
	      silently exit if global heartbeat has not been enabled.

       stop-heartbeat cluster-name
	      Stops  global  heartbeat on all regions for the cluster. It will
	      silently exit if global heartbeat has not been enabled.

EXAMPLE
       To create a cluster, mycluster having two nodes, node1 and node2, do:
       [root@node1 ~]# o2cb add-cluster mycluster
       [root@node1 ~]# o2cb add-node mycluster node1 --ip 10.10.10.1
       [root@node1 ~]# o2cb add-node mycluster node2 --ip 10.10.10.2

       To specify a global heartbeat device, /dev/sda1, do:
       [root@node1 ~]# o2cb add-heartbeat mycluster /dev/sda1

       To enable global heartbeat, do:
       [root@node1 ~]# o2cb heartbeat-mode mycluster global

SEE ALSO
       mkfs.ocfs2(8)	debugfs.ocfs2(8)     fsck.ocfs2(8)     tunefs.ocfs2(8)
       mounted.ocfs2(8) ocfs2console(8) o2cb(7)

AUTHORS
       Oracle Corporation

COPYRIGHT
       Copyright © 2010 Oracle. All rights reserved.

Version 1.8.0			September 2010			       o2cb(8)

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