check_uptime

[srisurya]

I want to get a clear picture on how to use check_uptime. I want the threshold to be critical if the system is up for more than 15 minutes. How can I set it up ?

[mcapra]

From the help menu:

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[root@localhost libexec]# ./check_uptime -h
check_uptime v2.1.2 (nagios-plugins 2.1.2)
Copyright (c) 2014 Nagios Plugin Development Team
        <Andy Brist>

This plugin checks the system uptime and alerts if less than the threshold.
Threshold unit of measurement specified with "-u".
"-u" switch supports: seconds|minutes|hours|days.
Usage:
check_uptime [-u uom] [-w threshold] [-c threshold] [-t] [-h] [-vvv] [-V]

Options:
 -h, --help
    Print detailed help screen
 -V, --version
    Print version information
 --extra-opts=[section][@file]
    Read options from an ini file. See
    https://www.nagios-plugins.org/doc/extra-opts.html
    for usage and examples.
-t, Plugin timeout, default 10 seconds
-c, Critcal threshold
-w, Warning threshold
-u, Time unit of measurement (seconds|minutes|hours|days) (default: minutes)
-vvv, Enable verbose output

If I wanted to return critical for a machine with uptime greater than 15 minutes:

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[root@localhost libexec]# /usr/local/nagios/libexec/check_uptime -u minutes -w 10 -c 15
Uptime CRITICAL: 20 day(s) 1 hour(s) 25 minute(s) | uptime=28885.000000;10.000000;15.000000;

And if I reboot the machine:

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[root@localhost ~]# /usr/local/nagios/libexec/check_uptime -u minutes -w 10 -c 15
Uptime OK: 0 day(s) 0 hour(s) 1 minute(s) | uptime=1.000000;10.000000;15.000000;