Name
heartbeat — Heartbeat subsystem for High-Availability
Linux
Description
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 configurations.
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type has been superseded by functionality in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 used.
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 http://linux-ha.org/.
Options
The following options are supported by heartbeat:
-
-d
Increment debugging level. Higher levels are more
verbose.
-
-r
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
ha.cf(5)
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.
-
-k
Kill (stop) heartbeat.
-
-s
Report heartbeat status.
-
-R
Heartbeat restart exec flag (internal use only). May
not be used with -r.
-
-C
Heartbeat current resource state for restart (internal
use only). Only valid with -R.
-
-V
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
ha.cf(5),
authkeys(5)
