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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 303031781 by bakunin on Tuesday 5th of March 2019 07:45:03 PM
Old 03-05-2019
The following is probably more a workaround then a solution:

You said that you have no problems with small files but ony big files. In addition, i get from your wording that you don't need real-time exactness because you will poll the data only once in a while. So, why not set up a small cron job that copies the last line of the big log into a small file, each time overwriting the old one, like this sketch script:

Code:
tail -n 1 /path/to/big.log > /path/to/last.logline

Then you can query this new file with your Zabbix methods because it always contain one line only.

I hope this helps.

bakunin
 

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LEARN ABOUT CENTOS

modemmanager

MODEMMANAGER(8) 					      System Manager's Manual						   MODEMMANAGER(8)

NAME

       ModemManager - modem management daemon

SYNOPSIS

       ModemManager [--version] | [--help]

       ModemManager [--debug] [--log-level=<level>] [--log-file=<filename>] [--timestamps] [--relative-timestamps]

DESCRIPTION

       The  ModemManager  daemon  provides a unified high level API for communicating with (mobile broadband) modems. While the basic commands are
       standardized, the more advanced operations (like signal quality monitoring while connected) varies a lot.

       ModemManager is a system daemon and is not meant to be used directly from the
	      command line.

OPTIONS

       The following options are supported:

       --version
	      Print the ModemManager software version and exit.

       --help Print ModemManager's available options and exit.

       --debug
	      Runs ModemManager with "DEBUG" log level and without daemonizing. This is useful for debugging, as it directs log output to the con-
	      trolling terminal in addition to syslog.

       --log-level=<level>
	      Sets  how much information ModemManager sends to the log destination (usually syslog's "daemon" facility). By default, only informa-
	      tional, warning, and error messages are logged. Given level must be one of "ERR", "WARN", "INFO" or "DEBUG".

       --log-file=<filename>
	      Specify location of the file where ModemManager will dump its log messages, instead of syslog.

       --timestamps
	      Include absolute timestamps in the log output.

       --relative-timestamps
	      Include timestamps, relative to the start time of the daemon, in the log output.

       SEE ALSO
	      NetworkManager(8).

								  31 October 2011						   MODEMMANAGER(8)
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