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#!/bin/sh
# File: /usr/lib64/nagios/plugins/check_apache_threads
# Author: bgstack15@gmail.com
# Startdate: 2017-01-09 15:53
# Title: Nagios Check for Apache Threads
# Purpose: For a troublesome dmz wordpress host
# Package: nagios-plugins-apache-threads
# History:
# Usage:
# In nagios/nconf, use this checkcommand check command line: $USER1$/check_by_ssh -H $HOSTADDRESS$ -C "$USER1$/check_apache_threads -w $ARG1$ -c $ARG2$"
# Reference: general design /usr/lib64/nagios/plugins/check_sensors
# general design http://www.kernel-panic.it/openbsd/nagios/nagios6.html
# case -w http://www.linuxquestions.org/questions/programming-9/ash-test-is-string-a-contained-in-string-b-671773/
# Improve:
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
REVISION="0.0.1"
. $PROGPATH/utils.sh
print_usage() {
cat <<EOF
Usage: $PROGNAME -w <thresh_warn> -c <thresh_crit>
EOF
}
print_help() {
print_revision $PROGNAME $REVISION
echo ""
print_usage
echo ""
echo "This plugin checks for the number of active apache threads."
echo ""
support
exit $STATE_OK
}
# MAIN
# Total httpd threads
tot_apache_threads="$( ps -ef | grep -ciE "httpd$" )"
verbosity=0
thresh_warn=
thresh_crit=
while test -n "${1}";
do
case "$1" in
--help|-h)
print_help
exit $STATE_OK
;;
--version|-V)
print_revision $PROGNAME $REVISION
exit $STATE_OK
;;
-v | --verbose)
verbosity=$(( verbosity + 1 ))
shift
;;
-w | --warning | -c | --critical)
if [[ -z "$2" || "$2" = -* ]];
then
# Threshold not provided
echo "$PROGNAME: Option '$1' requires an argument."
print_usage
exit $STATE_UNKNOWN
elif [[ "$2" = +([0-9]) ]];
then
# Threshold is a number
thresh="$2"
# use for a percentage template, from reference 2
#elif [[ "$2" = +([0-9])% ]]; then
# # Threshold is a percentage
# thresh=$(( tot_mem * ${2%\%} / 100 ))
else
# Threshold is not a number or other valid input
echo "$PROGNAME: Threshold must be an integer."
print_usage
exit $STATE_UNKNOWN
fi
case "$1" in *-w*) thresh_warn=$thresh;; *) thresh_crit=$thresh;; esac
shift 2
;;
-?)
print_usage
exit $STATE_OK
;;
*)
echo "$PROGNAME: Invalid option '$1'"
print_usage
exit $STATE_UNKNOWN
;;
esac
done
if test -z "$thresh_warn" || test -z "$thresh_crit";
then
# One or both values were unspecified
echo "$PROGNAME: Threshold not set"
print_usage
exit $STATE_UNKNOWN
elif test "$thresh_crit" -le "$thresh_warn";
then
echo "$PROGNAME: Critical value must be greater than warning value."
print_usage
exit $STATE_UNKNOWN
fi
if test "$verbosity" -ge 2;
then
# Print debugging information
/bin/cat <<EOF
Debugging information:
Warning threshold: $thresh_warn
Critical threshold: $thresh_crit
Verbosity level: $verbosity
Apache threads: ${tot_apache_threads}
EOF
fi
if test "${tot_apache_threads}" -gt "${thresh_crit}";
then
# too many apache threads
echo "APACHE CRITICAL - $tot_apache_threads"
exit $STATE_CRITICAL
elif test "${tot_apache_threads}" -gt "${thresh_warn}";
then
echo "APACHE WARNING - $tot_apache_threads"
exit $STATE_WARNING
else
# fine
echo "APACHE OK - $tot_apache_threads"
exit $STATE_OK
fi
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