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Full Discussion: Zabbix item for last line of a log file
Top Forums UNIX for Beginners Questions & Answers Zabbix item for last line of a log file Post 303031970 by rbatte1 on Friday 8th of March 2019 08:11:46 AM
Old 03-08-2019
Got it at last!! It's quite convoluted, so why not share and see if someone else might benefit or suggest how to improve it:-
  1. Create the Zabbix item in a template for the file as type log and key logrt[/path/to/log] with a history of 1 day and a refresh of 3 seconds (don't want old logs and need it reasonably up to date without hammering the servers) The logrt key allows it to cope with logs that are rotated.
  2. Assign the template to the required hosts, although in my case the template was already on several servers so it appears in various places straight away.
  3. Wait a few minutes for the data to be picked up, ensuring that some new data is actually written to the log.
  4. Determine the Zabbix item number for the log file on the particular host I'm interested in
  5. Use a web-request to get the log file from the Zabbix server
  6. Get the first record (stored so newest is at the top)
  7. Drop the log reference number (first item, tab separated)
  8. Hey presto, I have the message that I can display.
Quite a palaver. I'm also not sure if we have bespoke tools that do things like working out the item number or if having a webserver that can share the log files is default.

I hope that this helps someone. Does anyone think I need to add more detail on each step?



Robin
These 3 Users Gave Thanks to rbatte1 For This Post:
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LEARN ABOUT DEBIAN

torrus_monitor

TORRUS_MONITOR(8)						      torrus							 TORRUS_MONITOR(8)

NAME

       monitor - Torrus Monitor.

SYNOPSIS

       torrus monitor --tree=TREENAME [options...]

DESCRIPTION

       This command starts the Monitor process for the tree TREENAME. By default it forks into a daemon, sets the log output file to
       /var/log/torrus/monitor.TREENAME.log, performs one monitoring cycle, and sleeps until the next cycle is scheduled. In daemon mode the log
       file can be reopened by sending it a SIGHUP signal.

OPTIONS

       --nodaemon
	   Prevents the process from becoming a daemon and sets the log to STDERR.

       --runonce
	   Instructs the script to run once and exit. Implies --nodaemon.

       --delay=N
	   Makes the daemon sleep for N minutes before starting the first cycle.  This would happen on the daemon startup and also after each
	   configuration recompilation.  For example, when monitor and collector start simultaneously, the collector needs some time to retrieve
	   the data being monitored.

       --debug
	   Sets the log level to debug.

       --verbose
	   Sets the debug level to info.

       --help
	   Displays a help message.

FILES

       /etc/torrus/conf/torrus-siteconfig.pl
	   Torrus site configuration script.

       /var/log/torrus/monitor.TREENAME.log
	   Monitor's log for the tree TREENAME.

SEE ALSO

       torrus(8)

NOTES

       See more documentation at Torrus home page: http://torrus.org

AUTHOR

       Stanislav Sinyagin <ssinyagin@yahoo.com>

torrus 2.03							    2013-07-26							 TORRUS_MONITOR(8)
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