Provided by: ocfs2-tools_1.8.5-3ubuntu1_amd64 bug

NAME

       /etc/ocfs2/cluster.conf - Cluster configuration file for the o2cb cluster stack.

SYNOPSIS

       The  cluster layout of the o2cb cluster stack is specified in /etc/ocfs2/cluster.conf.  It
       lists the name of the cluster,  the  nodes  comprising  that  cluster  and  its  heartbeat
       regions.  The cluster stack expects this file to be the same on all nodes in that cluster.

       This file should be populated using the o2cb(8) cluster configuration utility. A sample of
       the same is shown in the example section.

DESCRIPTION

       The configuration file is divided into three  types  of  stanzas,  each  with  a  list  of
       parameters  and  values.  The  three stanza types are cluster, node and heartbeat. While a
       configuration file can store definitions of multiple  clusters,  the  o2cb  cluster  stack
       allows  only  one cluster to be active at any one time. The name of this active cluster is
       stored in /etc/sysconfig/o2cb [o2cb.sysconfig(5)].

       The cluster stanza specifies the name of the cluster, number of nodes  and  the  heartbeat
       mode.   The  cluster  name  can  include  upto  16 alphanumeric characters [0-9A-Za-z]. No
       special characters are allowed.

                ┌───────────────┬───────────────────────────────────────────────────────┐
                │ParametersDescription                                           │
                ├───────────────┼───────────────────────────────────────────────────────┤
                │node_count     │ Number of nodes in the cluster                        │
                ├───────────────┼───────────────────────────────────────────────────────┤
                │heartbeat_modelocal or global heartbeat                             │
                ├───────────────┼───────────────────────────────────────────────────────┤
                │name           │ Cluster name (upto 16 alphanumeric chars [0-9A-Za-z]) │
                └───────────────┴───────────────────────────────────────────────────────┘

       The node stanza specifies the node name that is part of the  cluster  alongwith  its  IPv4
       address,  port and node number.  The node name must match the hostname. The domain name is
       not required. For example, appserver1.company.com can be appserver1. The IPv4 address need
       not  be  the one associated with that hostname. As in, any valid IPv4 address on that node
       can be used. The o2cb cluster stack will not attempt to match  the  node  name  (hostname)
       with the specified IPv4 address. A low-latency private interconnect address is recommended
       for best performance.

               ┌───────────┬────────────────────────────────────────────────────────────┐
               │ParametersDescription                                                │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │ip_port    │ IPv4 port                                                  │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │ip_address │ IPv4 address (private interconnect recommended)            │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │number     │ Node number (0 - 254)                                      │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │name       │ Node name (hostname without the domain name)               │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │cluster    │ Cluster name (should match the name in the cluster stanza) │
               └───────────┴────────────────────────────────────────────────────────────┘

       The heartbeat stanza specifies the global heartbeat region UUIDs. A cluster can have  upto
       32  heartbeat  regions.  This  is  an  optional  stanza and is only required if the global
       heartbeat mode is enabled. In other words, the regions are only used if  heartbeat_mode  =
       global is in the cluster stanza. If not, this stanza is ignored.

               ┌───────────┬────────────────────────────────────────────────────────────┐
               │ParametersDescription                                                │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │region     │ Heartbeat region UUID                                      │
               ├───────────┼────────────────────────────────────────────────────────────┤
               │cluster    │ Cluster name (should match the name in the cluster stanza) │
               └───────────┴────────────────────────────────────────────────────────────┘

       While  manual  editing is not recommended, users doing so must follow the format strictly.
       The stanza should start at the first column and end with  a  colon.  The  parameters  must
       start  after a tab. A blank line must demarcate each stanza. Care should be taken to avoid
       stray white-spaces.

EXAMPLE

       The example below illustrates populating a cluster.conf with a cluster called  webcluster,
       having 3 nodes and 3 global heartbeat regions, using the o2cb(8) utility.

       $ o2cb add-cluster webcluster

       $ o2cb add-node webcluster node7 --ip 192.168.0.107 --number 7
       $ o2cb add-node webcluster node6 --ip 192.168.0.106 --number 6
       $ o2cb add-node webcluster node10 --ip 192.168.0.110 --number 10

       $ o2cb add-heartbeat webcluster /dev/sdg1
       $ o2cb add-heartbeat webcluster /dev/sdk1
       $ o2cb add-heartbeat webcluster /dev/sdh1

       $ o2cb heartbeat-mode webcluster global

       $ o2cb list-cluster webcluster
       heartbeat:
               region = 77D95EF51C0149D2823674FCC162CF8B
               cluster = webcluster

       heartbeat:
               region = DCDA2845177F4D59A0F2DCD8DE507CC3
               cluster = webcluster

       heartbeat:
               region = BBA1DBD0F73F449384CE75197D9B7098
               cluster = webcluster

       node:
               ip_port = 7777
               ip_address = 192.168.0.107
               number = 7
               name = node7
               cluster = webcluster

       node:
               ip_port = 7777
               ip_address = 192.168.0.106
               number = 6
               name = node6
               cluster = webcluster

       node:
               ip_port = 7777
               ip_address = 192.168.0.110
               number = 10
               name = node10
               cluster = webcluster

       cluster:
               node_count = 3
               heartbeat_mode = global
               name = webcluster

SEE ALSO

       o2cb(7) o2cb(8) o2cb.sysconfig(5)

AUTHORS

       Oracle Corporation

COPYRIGHT

       Copyright © 2004, 2012 Oracle. All rights reserved.