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White Rabbit Switch - Software
Commit 641b76db authored by Adam Wujek's avatar Adam Wujek 💬
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doc/wrs-user-manual: add information about monit 

Signed-off-by: Adam Wujek's avatarAdam Wujek <adam.wujek@cern.ch>
parent 2246e285
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doc/wrs-developer-manual.in
View file @ 641b76db
......@@ -1814,6 +1814,47 @@ gentle restarts before.
Date set from file @t{/update/saved_date} is never correct, but is based on
best effort principle.
@c ==========================================================================
@node Supervision of running processes
@section Supervision of running processes
During normal operation @t{monit} supervises several processes running on a wrs
switch. Check is done every 10 seconds. As for now supervised processes are:
@t{wrsw_rtud},
@t{wrsw_hal},
@t{ppsi},
@t{lighttpd},
@t{dropbear},
@t{snmpd}.
In case any of the supervised processes does not run anymore (because of a crash,
exit etc.), @t{monit} restarts missing process. If 5 restarts of a process
occur during 10 cycles (10*10 seconds), the entire switch is restarted.
Since @t{monit} is started from the inittab, even if @t{monit} crashes for some
reason it will be re-spawned by the @t{init}.
@c ==========================================================================
@node Disabling monit
@subsection Disabling monit
In some cases, especially during development it is convenient to disable
@t{monit} to avoid annoying re-spawns of the processes and restarts of the entire
switch.
@t{monit} can be disabled with command:
@example
/etc/init.d/monit.sh stop
@end example
which will send STOP signal to @t{monit} or by adding @t{CONFIG_MONIT_DISABLE=y} to dot-config.
To re-enable @t{monit} first make sure there is no @t{CONFIG_MONIT_DISABLE=y} in dot-config, then execute command:
@example
/etc/init.d/monit.sh start
@end example
NOTE: Even when @t{monit} is disabled there is a process @t{/usr/bin/monit} in
a process list, but its state is "stopped" (T).
@c ==========================================================================
@node SDB and Hardware Information
@section SDB and Hardware Information
......
doc/wrs-user-manual.in
View file @ 641b76db
......@@ -554,7 +554,7 @@ value is changed by the web interface, proper action is taken.
@item CONFIG_MONIT_DISABLE
Disable monitoring of running processes by monit. Monit by default
re spawns processes that have died. This option is useful mostly during
re-spawns processes that have died. This option is useful mostly during
development.
@end table
......
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