nagios 监控 nginx-白红宇

1.在被控端执行操作：把check_nginx插件放进/usr/local/nagios/libexec,并且授权属主和属组为nagios（这点非常关键）

[root@Jiechao libexec]# ll check_nginx

-rwxr-xr-x 1 nagios nagios 7636 Oct 23 22:48 check_nginx

2.vi /usr/local/nagios/etc/nrpe.cfg

添加这行：command[check_nginx]=/usr/local/nagios/libexec/check_nginx -w 15000 -c 20000

3.重启Nrpe:

killall -9 nrpe

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

4.被控端执行操作测试：

[root@Jiechao libexec]# ./check_nginx -H 192.168.0.100 -P 80 -p /var/run/ -n nginx.pid -s nginx_status -o /tmp/ -w 15000 -c 20000

OK - nginx is running. 1 requests per second, 1 connections per second (1.00 requests per connection) | 'reqpsec'=1 'conpsec'=1 'conpreq'=1.00 ]

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下面在Nagios Server端操作：

1.vi /usr/local/nagios/etc/objects/service.cfg

添加：

define service{

use generic-service

host_name Nagios-server,Nagios-client

service_description check_nginx

check_command check_nrpe!check_nginx

max_check_attempts 3

normal_check_interval 3

retry_check_interval 3

check_period 24x7

notification_interval 5

notification_period 24x7

notification_options w,u,c,r

contact_groups admins

process_perf_data 1

action_url /nagios/pnp/index.php?host=$HOSTNAME$&srv=$SERVICEDESC$

}

添加完，保存退出，重启Nagios即可。

/etc/init.d/nagios relaod

/etc/init.d/nagios restart

2.测试：/usr/local/nagios/libexec/check_nrpe -H 192.168.0.100 -c check_nginx

OK - nginx is running. 1 requests per second, 1 connections per second (1.00 requests per connection) | 'reqpsec'=1 'conpsec'=1 'conpreq'=1.00 ]

#---------------------192.168.0.100是我被控端的ip地址------------------------------------------------------

下面是一些注意的地方--

1、关于nginx.pid

--在nginx.conf一定要加上,如:pid /opt/nginx.pid

2、如果出现以下提示.

--UNKNOWN - Local copy/copies of nginx_status is empty.

--可能就是在你的nginx.conf没有配置状态监控,如

server

{

listen 80;

server_name IP | 域名;

location /nginx_status {

stub_status on;

access_log off;

}

3.需要更改check_nginx 一个地方：

把hostname="localhost"改为：你需要监控的主机ip。

如：hostname="192.168.0.100"

check_nginx 脚本

#!/bin/sh

PROGNAME=`basename $0`

VERSION="Version 1.0,"

AUTHOR="2009, Mike Adolphs ()"

ST_OK=0

ST_WR=1

ST_CR=2

ST_UK=3

hostname="192.168.0.100"

port=80

path_pid=/var/run

name_pid="nginx.pid"

status_page="nginx_status"

output_dir=/tmp

pid_check=1

secure=0

print_version() {

echo "$VERSION $AUTHOR"

}

print_help() {

print_version $PROGNAME $VERSION

echo ""

echo "$PROGNAME is a Nagios plugin to check whether nginx is running."

echo "It also parses the nginx's status page to get requests and"

echo "connections per second as well as requests per connection. You"

echo "may have to alter your nginx configuration so that the plugin"

echo "can access the server's status page."

echo "The plugin is highly configurable for this reason. See below for"

echo "available options."

echo ""

echo "$PROGNAME -H localhost -P 80 -p /var/run -n nginx.pid "

echo " -s nginx_statut -o /tmp [-w INT] [-c INT] [-S] [-N]"

echo ""

echo "Options:"

echo " -H/--hostname)"

echo " Defines the hostname. Default is: localhost"

echo " -P/--port)"

echo " Defines the port. Default is: 80"

echo " -p/--path-pid)"

echo " Path where nginx's pid file is being stored. You might need"

echo " to alter this path according to your distribution. Default"

echo " is: /var/run"

echo " -n/--name_pid)"

echo " Name of the pid file. Default is: nginx.pid"

echo " -N/--no-pid-check)"

echo " Turn this on, if you don't want to check for a pid file"

echo " whether nginx is running, e.g. when you're checking a"

echo " remote server. Default is: off"

echo " -s/--status-page)"

echo " Name of the server's status page defined in the location"

echo " directive of your nginx configuration. Default is:"

echo " nginx_status"

echo " -o/--output-directory)"

echo " Specifies where to write the tmp-file that the check creates."

echo " Default is: /tmp"

echo " -S/--secure)"

echo " In case your server is only reachable via SSL, use this"

echo " this switch to use HTTPS instead of HTTP. Default is: off"

echo " -w/--warning)"

echo " Sets a warning level for requests per second. Default is: off"

echo " -c/--critical)"

echo " Sets a critical level for requests per second. Default is:"

echo " off"

exit $ST_UK

}

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

;;

--path-pid|-p)

path_pid=$2

shift

;;

--name-pid|-n)

name_pid=$2

shift

;;

--no-pid-check|-N)

pid_check=0

;;

--status-page|-s)

status_page=$2

shift

;;

--output-directory|-o)

output_dir=$2

shift

;;

--secure|-S)

secure=1

;;

--warning|-w)

warning=$2

shift

;;

--critical|-c)

critical=$2

shift

;;

echo "Unknown argument: $1"

print_help

exit $ST_UK

;;

esac

shift

done

get_wcdiff() {

if [ ! -z "$warning" -a ! -z "$critical" ]

then

wclvls=1

if [ ${warning} -gt ${critical} ]

then

wcdiff=1

elif [ ! -z "$warning" -a -z "$critical" ]

then

wcdiff=2

elif [ -z "$warning" -a ! -z "$critical" ]

then

wcdiff=3

}

val_wcdiff() {

if [ "$wcdiff" = 1 ]

then

echo "Please adjust your warning/critical thresholds. The warning \

must be lower than the critical level!"

exit $ST_UK

elif [ "$wcdiff" = 2 ]

then

echo "Please also set a critical value when you want to use \

warning/critical thresholds!"

exit $ST_UK

elif [ "$wcdiff" = 3 ]

then

echo "Please also set a warning value when you want to use \

warning/critical thresholds!"

exit $ST_UK

}

check_pid() {

if [ -f "$path_pid/$name_pid" ]

then

retval=0

else

retval=1

}

get_status() {

if [ "$secure" = 1 ]

then

wget --no-check-certificate -q -t 3 -T 3 \

} -O ${output_dir}/nginx-status.1

sleep 1

wget --no-check-certificate -q -t 3 -T 3 \

} -O ${output_dir}/nginx-status.2

else

wget -q -t 3 -T 3 } \

-O ${output_dir}/nginx-status.1

sleep 1

wget -q -t 3 -T 3 } \

-O ${output_dir}/nginx-status.2

stat_output1=`stat -c %s ${output_dir}/nginx-status.1`

stat_output2=`stat -c %s ${output_dir}/nginx-status.2`

if [ "$stat_output1" = 0 -o "$stat_output2" = 0 ]

then

echo "UNKNOWN - Local copy/copies of $status_page is empty."

exit $ST_UK

}

get_vals() {

tmp1_reqpsec=`grep '^ ' ${output_dir}/nginx-status.1|awk '{print $3}'`

tmp2_reqpsec=`grep '^ ' ${output_dir}/nginx-status.2|awk '{print $3}'`

reqpsec=`expr $tmp2_reqpsec - $tmp1_reqpsec`

tmp1_conpsec=`grep '^ ' ${output_dir}/nginx-status.1|awk '{print $2}'`

tmp2_conpsec=`grep '^ ' ${output_dir}/nginx-status.2|awk '{print $2}'`

conpsec=`expr $tmp2_conpsec - $tmp1_conpsec`

reqpcon=`echo "scale=2; $reqpsec / $conpsec" | bc -l`

if [ "$reqpcon" = ".99" ]

then

reqpcon="1.00"

}

do_output() {

output="nginx is running. $reqpsec requests per second, $conpsec \

connections per second ($reqpcon requests per connection)"

}

do_perfdata() {

perfdata="'reqpsec'=$reqpsec 'conpsec'=$conpsec 'conpreq'=$reqpcon"

}

# Here we go!

get_wcdiff

val_wcdiff

if [ ${pid_check} = 1 ]

then

check_pid

if [ "$retval" = 1 ]

then

echo "There's no pid file for nginx. Is nginx running? Please \

also make sure whether your pid path and name is correct."

exit $ST_CR

get_status

get_vals

do_output

do_perfdata

if [ -n "$warning" -a -n "$critical" ]

then

if [ "$reqpsec" -ge "$warning" -a "$reqpsec" -lt "$critical" ]

then

echo "WARNING - ${output} | ${perfdata}"

exit $ST_WR

elif [ "$reqpsec" -ge "$critical" ]

then

echo "CRITICAL - ${output} | ${perfdata}"

exit $ST_CR

else

echo "OK - ${output} | ${perfdata} ]"

exit $ST_OK

else

echo "OK - ${output} | ${perfdata}"

exit $ST_OK

原文链接：http://blog.163.com/ly_89/blog/static/186902299201222111738667/

本文转自独弹古调 51CTO博客，原文链接：http://blog.51cto.com/hunkz/1657526，如需转载请自行联系原作者