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check_apache_status.pl

Plugin for Icinga, Nagios and Shinken to check the Apache httpd status.

If the Apache httpd status page is accessible then this plugin checks for following metrics:

  • open slots
  • busy workers
  • idle workers
  • requests per second
  • bytes per second
  • bytes per request

Command Line Options

Usage: check_apache_status.pl [OPTIONS]

-?, --usage

Print usage information

-h, --help

Print detailed help screen

-V, --version

Print version information

--extra-opts=[section][@file]

Read options from an ini file. See https://www.monitoring-plugins.org/doc/extra-opts.html for usage and examples.

-H, --hostname=STRING

hostname or ip address to check

-p, --port=INTEGER

port, default 80 (http) or 443 (https)

-U, --username

username for basic auth, requires password

-P, password

password for basic auth, requires username

-u, --uri=STRING

uri, default /server-status

-s, --ssl

use https instead of http

-N, --no_validate

do not validate the SSL certificate chain

-R, --unreachable

CRITICAL if socket timed out or http code >= 500

-w, --warning=STRING

warning threshold

-c, --critical=STRING

critical threshold

-t, --timeout=INTEGER

Seconds before plugin times out (default: 15)

-v, --verbose

Show details for command-line debugging (can repeat up to 3 times)

Threshold and ranges

A threshold is a range with an alert level (either WARNING or CRITICAL). Thresholds will be set comma separated in the following order:

  • open slots
  • busy workers
  • idle workers
  • requests per second
  • bytes per second
  • bytes per request

A range is defined as a start and end point (inclusive) on a numeric scale (possibly negative or positive infinity).

This is the generalised format for ranges:

[@]start:end

Notes

  • start ≤ end
  • start and ":" is not required if start=0
  • if range is of format "start:" and end is not specified, assume end is infinity
  • to specify negative infinity, use "~"
  • alert is raised if metric is outside start and end range (inclusive of endpoints)
  • if range starts with "@", then alert if inside this range (inclusive of endpoints)

Examples

Setting non for one of them is also possible. The following example sets the threshold for busy workers to WARNING for at least 10 busy workers and CRITICAL to at least of 25 busy workers:

check_apache_status.pl -H localhost -w ,10,,,, -c ,25,,,,

To additionally set the threshold for open_slots to WARNING when at or below 10 and CRITICAL when at or below 5:

check_apache_status.pl -H localhost -w 10:,10,,,, -c 5:,25,,,,