nginx+cacti+nagios

################################################################################
初始化环境（默认环境已经安装好mysql mysql-server mysql-devel以及development tools）
yum install gd gd-devel gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-devel krb5-devel libidn libidn-devel openssl httpd openssl-devel bison bison-devel readline readline-devel make apr* autoconf automake curl-devel gcc gcc-c++ openssl openssl-devel pcre-devel keyutils perl compat* mpfr cpp glibc libgomp libstdc++-devel ppl cloog-ppl keyutils-libs-devel libcom_err-devel libsepol-devel libselinux-devel libXpm* freetype libjpeg* libpng* ncurses* libtool* libxml2 libxml2-devel patch libevent lighttpd-fastcgi php* cmake
############################################################################
添加nginx使用组与账号
groupadd www
useradd -g www www -s /bin/false
安装nginx
tar zxvf nginx-1.4.3.tar.gz
cd nginx-1.4.3
./configure --prefix=/usr/local/webserver/nginx --user=www --group=www --with-file-aio --with-http_stub_status_module --with-http_gzip_static_module --with-http_flv_module --with-http_ssl_module --with-http_ssl_module
make && make install
制作nginx启动脚本
vim /etc/rc.d/init.d/nginx
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
# chkconfig:   - 85 15
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /usr/local/webserver/nginx/conf/nginx.conf
# config:      /etc/sysconfig/nginx
# pidfile:     /usr/local/webserver/nginx/logs/nginx.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
nginx="/usr/local/webserver/nginx/sbin/nginx"
prog=$(basename $nginx)
NGINX_CONF_FILE="/usr/local/webserver/nginx/conf/nginx.conf"
[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx
lockfile=/var/lock/subsys/nginx
make_dirs() {
# make required directories
user=`nginx -V 2>&1 | grep "configure arguments:" | sed 's/[^*]*--user=([^ ]*).*/1/g' -`
options=`$nginx -V 2>&1 | grep 'configure arguments:'`
for opt in $options; do
if [ `echo $opt | grep '.*-temp-path'` ]; then
value=`echo $opt | cut -d "=" -f 2`
if [ ! -d "$value" ]; then
# echo "creating" $value
mkdir -p $value && chown -R $user $value
fi
fi
done
}
start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
make_dirs
echo -n $"Starting $prog: "
daemon $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
stop() {
echo -n $"Stopping $prog: "
killproc $prog -QUIT
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
configtest || return $?
stop
sleep 1
start
}
reload() {
configtest || return $?
echo -n $"Reloading $prog: "
killproc $nginx -HUP
RETVAL=$?
echo
}
force_reload() {
restart
}
configtest() {
$nginx -t -c $NGINX_CONF_FILE
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit 2
esac
给nginx启动脚本添加权限并加入启动列表
chmod 775 /etc/rc.d/init.d/nginx
chkconfig nginx on
service nginx restart
service php-fpm start
chkconfig php-fpm on
更改php默认时区
vim /etc/php.ini
date.timezone = PRC
配置www.conf将账号和组设置为www
vim /etc/php-fpm.d/www.conf
user = www
group = www
建立网站文件存放目录
mkdir -p /data0/www
chown www.www /data0/www/ -R
chmod 700 /data0/www/ -R
编辑nginx的配置文件
vim /usr/local/webserver/nginx/conf/nginx.conf
#####################################################################################
安装cacti所需组件
yum install net-snmp net-snmp-utils net-snmp-devel rrdtool rrdtool-perl rrdtool-devel
安装cacti
tar zxvf cacti-0.8.8b.tar.gz
mv cacti-0.8.8b /data0/www/cacti
chown www.www /data0/www/ -R
chmod 700 /data0/www/ -R
建立cacti任务计划
crontab -u www -e
MAILTO=""
*/5 * * * * /usr/bin/php /data0/www/cacti/poller.php &>/dev/null
导入cacti数据库，并建立cactiuser账号
mysql -uroot -p
create table cacti
grant all on cacti.* to 'cactiuser'@'localhost' identified by '111111' with grant option;
flush privileges;
mysql -uroot -p111111 cacti < /data0/www/cacti/cacti.sql
修改cacti配置文件，修改mysql数据库相关参数
vim /data0/www/cacti/include/config.php
修改php线程目录属性
chown root.www  /var/lib/php/session/
修改nginx配置文件将cacti和nagios以及php，fastcgi加入，加入后访问cacti为http://IP/cacti ,访问nagios为：http://IP/nagios 并且nagios使用htpasswd账号。
vim /usr/local/webserver/nginx/conf/nginx.conf
user  www www;
worker_processes  2;
worker_cpu_affinity 01 10;
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
#pid        logs/nginx.pid;
worker_rlimit_nofile 10240;
events {
use epoll;
worker_connections  10240;
}
http {
include       mime.types;
default_type  application/octet-stream;
#log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
#                  '$status $body_bytes_sent "$http_referer" '
#                  '"$http_user_agent" "$http_x_forwarded_for"';
#access_log  logs/access.log  main;
sendfile        on;
tcp_nopush     on;
#keepalive_timeout  0;
keepalive_timeout  30;
tcp_nodelay on;
fastcgi_buffers 2 256k;
fastcgi_buffer_size 128k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
proxy_connect_timeout 100;
proxy_read_timeout 30;
proxy_buffer_size 8k;
proxy_buffers 8 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
gzip  on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain text/javascript application/x-javascript text/css application/xml;
gzip_vary on;
#    server {
#        listen       80;
#        server_name  localhost;
#        #charset koi8-r;
#        #access_log  logs/host.access.log  main;
#        location / {
#            root   /data0/www;
#            index  index.php  index.html index.htm;
#        }
        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        #
#        error_page   500 502 503 504  /50x.html;
#        location = /50x.html {
#            root   /data0/www;
#        }
        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
#        location ~ \.php$ {
#            root           html;
#            fastcgi_pass   127.0.0.1:9000;
#            fastcgi_index  index.php;
#            fastcgi_param  SCRIPT_FILENAME  /data0/www$fastcgi_script_name;
#            include        fastcgi_params;
#        }
        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
#    }
server
      {
        listen       80;
        server_name  localhost;
        index index.html index.htm index.php;
        root  /data0/www;
        location ~ .*\.(php|php5)?$
        {    
          fastcgi_pass  127.0.0.1:9000;
          fastcgi_index index.php;
             fastcgi_param  SCRIPT_FILENAME  /data0/www$fastcgi_script_name;
             include        fastcgi_params;
        }
        
        location /nagios
        {
        auth_basic "Nagios Access";
        auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;          }
        location /nginx_status
        {
           stub_status on;
           access_log   off;
        }
        location ~ .*\.(cgi|pl)?$
        {
        gzip off;
        root   /usr/local/nagios/sbin;
        rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
        fastcgi_pass  unix:/usr/local/webserver/nginx/logs/perl-fcgi.sock;
        fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name;
        fastcgi_index index.cgi;
        fastcgi_read_timeout   60;
        fastcgi_param  REMOTE_USER        $remote_user;
        include        fastcgi_params;
        auth_basic "Nagios Access";
        auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
        }
      }
    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    # HTTPS server
    #
    #server {
    #    listen       443;
    #    server_name  localhost;
    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;
    #    ssl_session_timeout  5m;
    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers   on;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
}
###################################################################################
建立nagios使用的账号
groupadd nagcmd
useradd -m nagios
usermod -a -G nagcmd nagios
将nginx安装使用的账号www也加到该组
usermod -a -G nagcmd www
安装nagios
tar zxvf nagios-3.5.1.tar.gz
修改
cd nagios-3.5.
./configure --with-command-group=nagcmd --enable-event=broker
make all
make install
make install-init
make install-config
make install-commandmode
    
填写管理员邮件地址
vim /usr/local/nagios/etc/objects/contacts.cfg
make install-webconf
建立nagios访问账号
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
安装nagios-plugins
tar zxvf nagios-plugins-1.5.tar.gz
cd nagios-plugins-1.5
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
加入启动列表
chkconfig --add nagios
chkconfig nagios on
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
service nagios start
将nagios页面路径链接到网站文件存放路径
ln -s  /usr/local/nagios/share/  /data0/www/nagios
chown -R www.www /data0/www/nagios
Nagios依赖PHP环境和perl环境。由于Nginx不支持Perl的CGI,这里就需要先来搭建Perl环境。
让nginx支持fcgi
安装FCGI模块
wget http://search.cpan.org/CPAN/authors/id/F/FL/FLORA/FCGI-0.73.tar.gz
tar FCGI-0.73.tar.gz
tar -zxvf FCGI-0.73.tar.gz
cd FCGI-0.73
perl Makefile.PL
make
make install
安装FCGI-ProcManager模块
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBJK/FCGI-ProcManager-0.19.tar.gz
tar -zxvf FCGI-ProcManager-0.19.tar.gz
cd FCGI-ProcManager-0.19
perl Makefile.PL
make
make install
安装IO和IO::ALL模块
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBARR/IO-1.25.tar.gz
tar -zxvf IO-1.25.tar.gz
cd IO-1.25
perl Makefile.PL
make
make install
cd
wget http://search.cpan.org/CPAN/authors/id/I/IN/INGY/IO-All-0.41.tar.gz
tar -zxvf IO-All-0.41.tar.gz
cd IO-All-0.41
perl Makefile.PL
make
make install
cd
下载Perl脚本，这个脚本的目的就是产生一个PERL的FastCGI接口，让Nginx可以以CGI方式处理Perl。
wget http://www.mike.org.cn/wp-content/uploads/2011/07/perl-fcgi.zip
ls
unzip perl-fcgi.zip
mv perl-fcgi.pl /usr/local/webserver/nginx/
chmod 755 /usr/local/webserver/nginx/perl-fcgi.pl
建立一个CGI启动/停止脚本，注意pidfile和dir路径。
vim /etc/init.d/perl-fcgi
#!/bin/bash
# chkconfig:   - 99 15
# description: perl-fcgi
# processname: perl-fcgi
# pidfile: /usr/local/webserver/nginx/logs/perl-fcgi.pid
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0
#set -x
dir=/usr/local/webserver/nginx
   
stop ()
{
#pkill  -f  $dir/perl-fcgi.pl
kill $(cat $dir/logs/perl-fcgi.pid)
rm $dir/logs/perl-fcgi.pid 2>/dev/null
rm $dir/logs/perl-fcgi.sock 2>/dev/null
echo "stop perl-fcgi done"
}
   
start ()
{
rm $dir/now_start_perl_fcgi.sh 2>/dev/null
rm $dir/logs/perl-fcgi.pid 2>/dev/null
rm $dir/logs/perl-fcgi.sock 2>/dev/null
chown www.www $dir/logs
echo "$dir/perl-fcgi.pl -l $dir/logs/perl-fcgi.log -pid $dir/logs/perl-fcgi.pid -S $dir/logs/perl-fcgi.sock" >>$dir/now_start_perl_fcgi.sh
   
chown www.www $dir/now_start_perl_fcgi.sh
chmod u+x $dir/now_start_perl_fcgi.sh
   
sudo -u www $dir/now_start_perl_fcgi.sh
echo "start perl-fcgi done"
}
   
case $1 in
stop)
stop
;;
start)
start
;;
restart)
stop
start
;;
esac
给脚本赋予权限
chmod 755 /etc/init.d/perl-fcgi
chkconfig --add perl-fcgi
chkconfig perl-fcgi on
由于启动脚本里使用了sudo，所以当服务器重启并加载这个服务脚本时会提示需要一个tty，导致fcgi不能随服务器一起启动起来，所以要修改/etc/sudoers
visudo
Defaults requiretty，修改为 Defaults:www !requiretty 表示仅 www 用户不需要控制终端。
启动脚本，正常情况下在/usr/local/webserver/nginx/logs下生成perl-fcgi.sock这个文件,如果没有生成,请检查下上面的步聚。
service perl-cgi start
service php-fpm restart
注意：nagios在nginx+fcgi下会出现在web界面下设置主机信息的时候出错502，这是需要
到nagios源代码目录的cgi目录，找到cmd.c文件，搜索post，只有一个，修改为get，然后执行
make clean
make all
make install-cgis
service nagios restart
#################################################################################################
安装ndoutils，该插件可以将nagios监控结果保存到mysql中
tar -zxvf ndoutils-1.5.2.tar.gz
cd ndoutils-1.5.2
./configure  --enable-mysql --with-ndo2db-user=nagios --with-ndo2db-group=nagios
make
将源目录下的相关文件考到相应位置并修改权限
cp src/{ndomod-3x.o,ndo2db-3x,log2ndo,file2sock} /usr/bin/
cp config/ndo2db.cfg-sample /usr/local/nagios/etc/ndo2db.cfg
cp config/ndomod.cfg-sample /usr/local/nagios/etc/ndomod.cfg
chown nagios.nagios /usr/local/nagios/etc/ndo*
chmod 664 /usr/local/nagios/etc/ndo*
修改ndo2db配置文件
vim /usr/local/nagios/etc/ndo2db.cfg
  socket_type=tcp
  db_host=localhost
  db_port=3306
  db_name=cacti
  db_prefix=npc_
  db_user=cactiuser
  db_pass=111111
  debug_level=1
修改ndomod配置文件
vim /usr/local/nagios/etc/ndomod.cfg
  output_type=tcpsocket
  output=127.0.0.1
将ndo2db启动脚本放到系统目录下
cp daemon-init /etc/init.d/ndo2db
编辑该启动脚本
vim /etc/init.d/ndo2db
  Ndo2dbBin=/usr/bin/ndo2db-3x
修改启动脚本权限并启动 
chmod +x /etc/init.d/ndo2db
chkconfig --add ndo2db
chkconfig ndo2db on
service ndo2db start
修改nagios配置文件，让nagios支持ndomod这个broker。
vim /usr/local/nagios/etc/nagios.cfg
  broker_module=/usr/bin/ndomod-3x.o config_file=/usr/local/nagios/etc/ndomod.cfg
  event_broker_options=-1
    
重启nginx
service nginx restart
安装cacti的npc插件
tar -zxvf npc-2.0.4.tar.gz
mv npc/ /data0/www/cacti/plugins/
vim /data0/www/cacti/include/global.php
  $plugins = array();
  $plugins[]='npc';
重置下cacti插件目录权限
chown www.www -R /data0/www/cacti/plugins/
登陆cacti，安装npc插件
配置 npc
Console -> Settings -> npc
钩选Remote Commands
Nagios Command File Path：      /usr/local/nagios/var/rw/nagios.cmd
Nagios URL：                    http://yourserver/nagios
添加执行权限
chmod +x /usr/local/nagios/var/rw/nagios.cmd
    
mysql修改表结构，否则npc无数据
alter table npc_eventhandlers add long_output TEXT NOT NULL default '' after output;
alter table npc_hostchecks add long_output TEXT NOT NULL default '' after output;
alter table npc_hoststatus add long_output TEXT NOT NULL default '' after output;
alter table npc_notifications add long_output TEXT NOT NULL default '' after output;
alter table npc_servicechecks add long_output TEXT NOT NULL default '' after output;
alter table npc_servicestatus add long_output TEXT NOT NULL default '' after output;
alter table npc_statehistory add long_output TEXT NOT NULL default '' after output;
alter table npc_systemcommands add long_output TEXT NOT NULL default '' after output;
service php-fpm restart
service cgi restart
service nginx restart
service nagios restart
service ndo2db restart
#########################################################################################
安装nrpe（nagios监控linux服务器，需要让被监控的linux服务器安装nrpe+nagiosplugins，nagiosplugins由于该服务器已经安装，所以不需再动）
nrpe依靠xinetd服务器，先安装xinetd
tar -zxvf nrpe-2.15.tar.gz
cd nrpe-2.15
./configure --with-nrpe-user=nagios --with-nrpe-group=nagios --with-nagios-user=nagios --with-nagios-group=nagios --enable-ssl --enable-command-args
make all
make install-plugin
make install-daemon
make install-daemon-config
vim /etc/init.d/nrpe
#!/bin/sh
#
# chkconfig:   - 99 15
# processname: nrpe
# Source function library
if [ -f /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
elif [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/functions ]; then
. /etc/rc.d/functions
fi
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
NrpeBin=/usr/local/nagios/bin/nrpe
NrpeCfg=/usr/local/nagios/etc/nrpe.cfg
LockFile=/var/lock/subsys/nrpe
# See how we were called.
case "$1" in
  start)
 # Start daemons.
 echo -n "Starting nrpe: "
 daemon $NrpeBin -c $NrpeCfg -d
 echo
 touch $LockFile
 ;;
  stop)
 # Stop daemons.
 echo -n "Shutting down nrpe: "
 killproc nrpe
 echo
 rm -f $LockFile
 ;;
  restart)
 $0 stop
 $0 start
 ;;
  status)
 status nrpe
 ;;
  *)
 echo "Usage: nrpe {start|stop|restart|status}"
 exit 1
esac
exit 0
赋予执行权限，加入启动列表，启动nrpe
chmod +x /etc/init.d/nrpe
chkconfig --add nrpe
chkconfig nrpe on
service nrpe restart
测试nrpe
/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1 -c check_load
    
    
nagios监控nginx
建立check_nginx命令脚本
vim /usr/local/nagios/libexec/check_nginx （注意修改里面各变量路径）
#!/bin/sh
PROGNAME=`basename $0`
VERSION="Version 1.0,"
AUTHOR="2009, Mike Adolphs (http://www.matejunkie.com/)"
ST_OK=0
ST_WR=1
ST_CR=2
ST_UK=3
hostname="localhost"
port=80
path_pid=/usr/local/webserver/nginx/logs
name_pid="nginx.pid"
status_page="nginx_status"
output_dir=/tmp
pid_check=1
secure=0
print_version() {
    echo "$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 $hostname -P 80 -p $path_pid -n $name_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 ${critical} ]
        then
            wcdiff=1
        fi
    elif [ ! -z "$warning" -a -z "$critical" ]
    then
        wcdiff=2
    elif [ -z "$warning" -a ! -z "$critical" ]
    then
        wcdiff=3
    fi
}
val_wcdiff() {
    if [ "$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 $ST_UK
    fi
}
check_pid() {
    if [ -f "$path_pid/$name_pid" ]
    then
        retval=0
    else
        retval=1
    fi
}
get_status() {
    if [ "$secure" = 1 ]
    then
        wget --no-check-certificate -q -t 3 -T 3 \
http://${hostname}:${port}/${status_page} -O ${output_dir}/nginx-status.1
        sleep 1
        wget --no-check-certificate -q -t 3 -T 3 \
http://${hostname}:${port}/${status_page} -O ${output_dir}/nginx-status.2
    else       
        wget -q -t 3 -T 3 http://${hostname}:${port}/${status_page} \
-O ${output_dir}/nginx-status.1
        sleep 1
        wget -q -t 3 -T 3 http://${hostname}:${port}/${status_page} \
-O ${output_dir}/nginx-status.2
    fi
    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
    fi
}
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"
    fi
}
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 $ST_CR
    fi
fi
get_status
get_vals
do_output
do_perfdata
if [ -n "$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
    fi
else
    echo "OK - ${output} | ${perfdata}"
    exit $ST_OK
fi
赋给权限
chown nagios.nagios /usr/local/nagios/libexec/check_nginx
chmod +x /usr/local/nagios/libexec/check_nginx
编辑nrpe配置文件
vim /usr/local/nagios/etc/nrpe.cfg
  command[check_nginx]=/usr/local/nagios/libexec/check_nginx -w 15000 -c 20000
测试
  /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
  /usr/local/nagios/libexec/check_nginx -H 127.0.0.1 -P 80 -p /usr/local/webserver/nginx/logs/ -n nginx.pid -s  nginx_status -o /tmp/ -w 15000 -c 20000
    
编辑nginx配置文件，让nginx能够提供状态值页面，上面给的配置文件已经加过，在此只做参考。
vim /usr/local/webserver/nginx/conf/nginx.conf
  location /nginx_status {
    stub_status on;
    access_log   off;
  }
    
编辑vim /usr/local/nagios/etc/objects/commands.cfg,将nginx命令加入
  # 'check_nginx' command definition
define command{
        command_name    check_nginxstatus
        command_line    $USER1$/check_nginx -H $ARG1$ -P $ARG2$ -p $ARG3$ -n $ARG4$ -o $ARG5$ -w $ARG6$ -c $ARG7$
        }
    
编辑vim /usr/local/nagios/etc/objects/localhost.cfg，将nginx服务导入（注意模板使用的是generic-service）
  define service{
        use                             generic-service 
        host_name                       localhost
        service_description             Nginx
        check_command                   check_nginxstatus!ip!80!/usr/local/webserver/nginx/logs!nginx.pid!nginx_status!/tmp!15000!20000
        notifications_enabled           1
        }
    
重启nginx
  service nginx restart
    
重启nagios
  service nagios restart
    
链接nginx默认首页，否则nagios里的http会warning。
  ln -s /usr/local/webserver/nginx/html/index.html /data0/www/index.html
  ln -s /usr/local/webserver/nginx/html/50x.html /data0/www/50x.html
    
    
配置系统的邮件由个人常用的邮箱转发，这样nagios就可以用你的个人邮箱发送报警通知了。
  vim /etc/mail.rc