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       heartbeat - Heartbeat subsystem for High-Availability Linux


       heartbeat is a basic heartbeat subsystem for Linux-HA. It will run
       scripts at initialisation, and when machines go up or down. This
       version will also perform IP address takeover using gratuitous ARPs. It
       works correctly for a 2-node configuration, and is extensible to larger

       It implements the following kinds of heartbeats:

       ·   UDP/IP broadcast;

       ·   UDP/IP multicast;

       ·   UDP/IP unicast;

       ·   Bidirectional Serial Rings ("raw" serial ports) — this type is
           deprecated and should no longer be used;

       ·   special "ping" heartbeats for routers, etc. — this type has been
           superseded by functionality in pacemaker() and should no longer be

       Comprehensive documentation on heartbeat is available in the Heartbeat
       User's Guide. If this documentation is not installed on your system, it
       can be found at


       The following options are supported by heartbeat:

           Increment debugging level. Higher levels are more verbose.

           Reload heartbeat. This option is functionally identical to sending
           a running heartbeat process a HUP signal. If the configuration has
           not changed, then this option is essentially a no-op. If
           or authkeys(5) has changed, then heartbeat will re-read these files
           and update its configuration.

           This option may not be used together with -R.

           Kill (stop) heartbeat.

           Report heartbeat status.

           Heartbeat restart exec flag (internal use only). May not be used
           with -r.

           Heartbeat current resource state for restart (internal use only).
           Only valid with -R.

           Print out heartbeat version.

       Note that most of these options are used for supporting the heartbeat
       init script, which provides the conventional start, stop, status and
       restart options (among others). It is recommended to use this rather
       than invoking the heartbeat command directly.

SEE ALSO, authkeys(5)


       Alan Robertson <>

       Juan Pedro Paredes Caballero <>
           man page

       Simon Horman <>
           man page

       Florian Haas <>
           man page