Name
apphbd — Application Heartbeat Monitor for High-Availability Linux
Synopsis
apphbd [-srkdh] [-c file]
Description
![[Warning]](images/warning.png) | Warning |
|---|---|
apphbd is deprecated; its use is strongly discouraged. The functionality provided by apphbd has been replaced by resource-level monitoring in Pacemaker. |
/usr/lib/heartbeat/apphbd is a basic application heartbeat monitor daemon for Linux-HA. A group of Application Heartbeat APIs are defined for this heartbeat monitoring service. Applications may register with the daemon in order to be monitored. If an application fails to send a heartbeat within the specified interval, the daemon will log an event.
apphbd may use a watchdog timer to monitor itself.
apphbd extends its functionality by using plugins.
A plugin, recmgr notifies the recovery manager
daemon if certain events occur (e.g. an application fails to
heartbeat).
The Recovery Manager daemon
(/usr/lib/heartbeat/recoverymgrd) receives
notification from the recmgr plugin, then it tries to
execute recovery scripts as configured. See the
recoverymgrd default configuration file,
recoverymgrd.conf for details.
recoverymgrd registers itself with
apphbd as a client
application. apphbd should be started first
with the recmgr plugin loaded. Then,
recoverymgrd should be configured and started
Options
The following options are supported:
-
-s Show the status of apphbd, running or stopped.
-
-k Stop (kill) the daemon.
-
-r Restart the daemon. apphbd will reload its configuration file when restarted.
-
-dlevel Set the debug level.
-
-h Show a brief usage message.
-
-cfile Set an alternate configuration file. The default configuration file is
./apphbd.cf. For details on the file format and supported options, refer to the exampleapphbd.cffile found in the documentation directory.
Files
/var/run/apphbd.pid– default PID fileapphbd.cf– Default configuration file for apphbd. apphbd searches the file in its working directory.recoverymgrd.conf– default configuration file for recoverymgrd. recoverymgrd searches the file in its working directory. An alternative configuration file may be specified on the command line./usr/lib/heartbeat/plugins/AppHBNotification– directory containing plugins for apphbd.