File check_apache2.sh of Package monitoring-plugins-apache2
#!/bin/sh
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
PROGNAME=`basename $0`
VERSION="Version 1.3,"
AUTHOR="2009, Mike Adolphs (http://www.matejunkie.com/)"
print_version() {
echo "$VERSION $AUTHOR"
}
print_help() {
print_version $PROGNAME $VERSION
echo ""
echo "Description:"
echo "$PROGNAME is a Nagios plugin to check the Apache's server status."
echo "It monitors requests per second, bytes per second/request, "
echo "amount of busy/idle workers and its CPU load."
echo ""
echo "Example call:"
echo "./$PROGNAME -H localhost -P 80 -t 3 -b /usr/sbin -p /var/run \\"
echo "-n apache2.pid -s status_page [-S] [-R] [-wr] 100 [-cr] 250"
echo ""
echo "Options:"
echo " -H|--hostname)"
echo " Sets the hostname. Default is: localhost"
echo " -P|--port)"
echo " Sets the port. Default is: 80"
echo " -t|--timeout)"
echo " Sets a timeout within the server's status page must've been"
echo " accessed. Otherwise the check will go into an error state."
echo " Default is: 3"
echo " -b|--binary-path)"
echo " Sets the path to the apache binary. Used for getting Apache's"
echo " CPU load. Default is: /usr/sbin"
echo " -p|--pid-path)"
echo " Path to Apache's pid file. Default is: /var/run"
echo " -n|--pid-name)"
echo " Name of Apache's pid file. Default is: apache2.pid"
echo " -s|--status-page)"
echo " Defines the name of the status page. Default is: server-status"
echo " -R|--remote-server)"
echo " Disabled the pid check so that remote Apaches can be queried."
echo " Default is: off"
echo " -S|--secure)"
echo " Enables HTTPS (no certificate check though). Default is: off"
echo " -wr|--warning-req)"
echo " Sets a warning level for requests per second. Default is: off"
echo " -cr|--critical-req)"
echo " Sets a critical level for requests per second. Default is: off"
exit $ST_UK
}
ST_OK=0
ST_WR=1
ST_CR=2
ST_UK=3
hostname="localhost"
port=80
remote_srv=0
path_binary="/usr/sbin"
path_pid="/var/run"
name_pid="apache2.pid"
status_page="server-status"
timeout=3
secure=0
running=0
wcdiff_req=0
wclvls_req=0
while test -n "$1"; do
case "$1" in
--help|-h)
print_help
exit $ST_UK
;;
--version|-v)
print_version $PROGNAME $VERSION
exit $ST_UK
;;
--hostname|-H)
hostname=$2
shift
;;
--port|-P)
port=$2
shift
;;
--timeout|-t)
timeout=$2
shift
;;
--remote-server|-R)
remote_srv=1
;;
--binary_path|-b)
path_binary=$2
shift
;;
--pid_path|-p)
path_pid=$2
shift
;;
--pid_name|-n)
name_pid=$2
shift
;;
--status-page|-s)
status_page=$2
shift
;;
--secure|-S)
secure=1
;;
--warning-req|-wr)
warn_req=$2
shift
;;
--critical-req|-cr)
crit_req=$2
shift
;;
*)
echo "Unknown argument: $1"
print_help
exit $ST_UK
;;
esac
shift
done
# check functions
val_wcdiff_req() {
if [ ! -z "$warn_req" -a ! -z "$crit_req" ]
then
wclvls_req=1
if [ ${warn_req} -gt ${crit_req} ]
then
wcdiff_req=1
fi
elif [ ! -z "$warn_req" -a -z "$crit_req" ]
then
wcdiff_req=2
elif [ -z "$warn_req" -a ! -z "$crit_req" ]
then
wcdiff_req=3
fi
}
check_pid() {
if [ -f "$path_pid/$name_pid" ]
then
retval=0
else
retval=1
fi
}
check_processes() {
if [ $1 -lt 1 ]
then
echo "UNKNOWN - Your Apache server seems not to run. Is your Nagios \
privileged to run 'ps ax' and is the Apache2 binary really located in \
$path_binary?"
exit $ST_UK
fi
}
check_output() {
stat_output=`stat -c %s ${output_dir}/server-status`
if [ "$stat_output" = 0 ]
then
echo "UNKNOWN - Local copy of server-status is empty. Are we \
allowed to access http://${hostname}:${port}/server-status?"
exit $ST_UK
fi
}
# get functions
get_status() {
if [ "$secure" = 1 ]
then
server_status1=`wget -qO- --no-check-certificate -t 3 \
-T ${timeout} https://${hostname}:${port}/${status_page}?auto`
sleep 1
server_status2=`wget -qO- --no-check-certificate -t 3 \
-T ${timeout} https://${hostname}:${port}/${status_page}?auto`
else
server_status1=`wget -qO- -t 3 -T ${timeout} \
http://${hostname}:${port}/${status_page}?auto`
sleep 1
server_status2=`wget -qO- -t 3 -T ${timeout} \
http://${hostname}:${port}/${status_page}?auto`
fi
}
get_vals() {
cpu_load="$(cpu_load=0; ps -Ao pcpu,args | grep "$path_binary/apache2" \
| awk '{print $1}' | while read line
do
cpu_load=`echo "scale=3; $cpu_load + $line" | bc -l`
echo $cpu_load
done)"
cpu_load=`echo $cpu_load | awk '{print $NF}' | sed 's/^\./0./'`
tmp1_req_psec=`echo ${server_status1} | awk '{print $3}'`
tmp2_req_psec=`echo ${server_status2} | awk '{print $3}'`
req_psec=`echo "scale=2; ${tmp2_req_psec} - ${tmp1_req_psec}" | bc -l \
| sed 's/^\./0./'`
bytes_psec=`echo ${server_status1} | awk '{print $14}' | sed 's/^\./0./'`
bytes_preq=`echo ${server_status1} | awk '{print $16}' | sed 's/^\./0./'`
wkrs_busy=`echo ${server_status1} | awk '{print $18}' | sed 's/^\./0./'`
wkrs_idle=`echo ${server_status1} | awk '{print $20}' | sed 's/^\./0./'`
}
do_output() {
output="Apache serves $req_psec Requests per second with an average CPU \
utilization of $cpu_load%. Busy workers: $wkrs_busy, idle: $wkrs_idle"
}
do_perfdata() {
perfdata="'cpu_load'=$cpu_load 'req_psec'=$req_psec \
'bytes_psec'=$bytes_psec 'bytes_preq'=$bytes_preq 'workers_busy'=$wkrs_busy \
'workers_idle'=$wkrs_idle"
}
# Let's go
val_wcdiff_req
if [ "$wcdiff_req" = 1 ]
then
echo "Please adjust your warning/critical thresholds. The warning must \
be lower than the critical level!"
exit $ST_UK
elif [ "$wcdiff_req" = 2 ]
then
echo "Please also set a critical value when you want to use \
warning/critical thresholds!"
exit $ST_UK
elif [ "$wcdiff_req" = 3 ]
then
echo "Please also set a warning value when you want to use \
warning/critical thresholds!"
exit $ST_UK
else
if [ "$remote_srv" = 0 ]
then
running=`check_pid`
check_pid $running
fi
get_status
get_vals
do_output
do_perfdata
if [ ${wclvls_req} = 1 ]
then
if [ ${req_psec} -ge ${warn_req} -a ${req_psec} -lt ${crit_req} ]
then
echo "WARNING - ${output} | ${perfdata}"
exit $ST_WR
elif [ ${req_psec} -ge ${crit_req} ]
then
echo "CRITICAL - ${output} | ${perfdata}"
exit $ST_CR
else
echo "OK - ${output} | ${perfdata}"
exit $ST_OK
fi
else
echo "OK - ${output} | ${perfdata}"
exit $ST_OK
fi
fi
