CentOS 6.2+Nginx+Nagios,手機短信和qq郵箱提醒

注：192.168.0.21 服務端

192.168.0.22 客戶端

環境：兩臺centos6.0 64位系統，都已經搭建好了源碼的lnmp平臺

結尾附上所需的軟件包

1.nagios安裝（中文版）

tar xvf nagios-cn-3.2.3.tar.bz2
cd nagios-cn-3.2.3
useradd -m -s /bin/bash nagios
usermod -a -G nagcmd nagios
./configure --prefix=/usr/local/nagios --with-command-group=nagcmd
make
make all
make install
make install-init     # 生成init啓動腳本
make install-config     # 安裝示例配置文件
make install-commandmode     # 設置相應的目錄權限
chmod o+rwx /usr/local/nagios/var/rw

2.nagios-plugins安裝

wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins
tar zxvf nagios-plugins-1.4.16.tar.gz
cd nagios-plugins-1.4.16
yum install make apr* autoconf automake curl curl-devel gcc gcc-c++ zlib-devel \
openssl openssl-devel pcre-devel gd gd-devel kernel keyutils patch perl perl-devel \
kernel keyutils kernel-headers compat* mpfr cpp glibc libgomp libstdc++-devel ppl \
cloog-ppl keyutils-libs-devel libcom_err-devel libsepol-devel libselinux-devel \
krb5-devel zlib-devel libXpm* freetype libjpeg* libpng* php-common php-gd ncurses* libtool* libxml2 libxml2-devel patch -y

./configure --prefix=/usr/local/nagios --with-mysql=/home/mysql/
make
make install

3.nrpe安裝

tar xzvf nrpe-2.12.tar.gz
cd nrpe-2.12
./configure
make
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config
\cp src/check_nrpe /usr/local/nagios/libexec/
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
echo '/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d' >> /etc/rc.local

要重啓nrpe進行就先殺掉進行，然後重啓
kill `ps aux |grep nrpe |grep -v grep |awk '{print $2}'`
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
本機測試下：
/usr/local/nagios/libexec/check_nrpe -H localhost -c check_users

加入系統服務

加入系統服務並設爲開機自動
chkconfig --add nagios
chkconfig nagios on
chown nagios.nagios /usr/local/nagios/var/rw
# 測試配置文件是否正確
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

添加別名命令，方便測試配置文件

vi ~/.bashrc
在裏面用alias 來自定義一個命令來代替，這裏我用check
alias check='/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg'
source ~/.bashrc
此時可以用check命令來檢測配置文件了

修改聯繫人郵箱，修改爲用於報警接收的郵件地址

vi /usr/local/nagios/etc/objects/contacts.cfg
###############################################################################
# CONTACTS.CFG - SAMPLE CONTACT/CONTACTGROUP DEFINITIONS
#
# Last Modified: 05-31-2007
#
# NOTES: This config file provides you with some example contact and contact
#        group definitions that you can reference in host and service
#        definitions.
#
#        You don't need to keep these definitions in a separate file from your
#        other object definitions.  This has been done just to make things
#        easier to understand.
#
###############################################################################
###############################################################################
###############################################################################
#
# CONTACTS
#
###############################################################################
###############################################################################
# Just one contact defined by default - the Nagios admin (that's you)
# This contact definition inherits a lot of default values from the 'generic-contact'
# template which is defined elsewhere.
define contact{
        contact_name                    nagiosadmin             ; Short name of user
        use                             generic-contact         ; Inherit default values from generic-contact template (defined above)
        alias                           Nagios Admin            ; Full name of user
        email                           nagios@localhost        ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ******
        }
###############################################################################
###############################################################################
#
# CONTACT GROUPS
#
###############################################################################
###############################################################################
# We only have one contact in this simple configuration file, so there is
# no need to create more than one contact group.
define contactgroup{
        contactgroup_name       admins
        alias                   Nagios Administrators
        members                 nagiosadmin
        }
定義check_nrpe命令
vi /usr/local/nagios/etc/objects/commands.cfg
define command{
command_name check_nrpe
command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}

檢測配置文件是否有誤

check

nginx 配置，Nginx fastcgi perl (pl、cgi)支持
安裝FCGI模塊
cd
tar zxvf FCGI-0.70.tar.gz
cd FCGI-0.70
perl Makefile.PL
make
make install
cd
安裝 IO 和 IO::ALL模塊
tar zxvf IO-1.25.tar.gz
cd IO-1.25
perl Makefile.PL
make
make install
cd
tar zxvf IO-All-0.41.tar.gz
cd IO-All-0.41
perl Makefile.PL
make
make install
cd
unzip perl-fcgi.zip
cp perl-fcgi.pl /usr/local/nginx/
chmod 755 /usr/local/nginx/perl-fcgi.pl

vi /usr/local/nginx/start_perl_cgi.sh
#!/bin/bash
#set -x
dir=/usr/local/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
chown nobody.root $dir/logs
echo "$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 nobody.nobody $dir/now_start_perl_fcgi.sh
chmod u+x $dir/now_start_perl_fcgi.sh
sudo -u nobody $dir/now_start_perl_fcgi.sh
echo "start perl-fcgi done"
}
case $1 in
stop)
stop
;;
start)
start
;;
restart)
stop
start
;;
esac

把start_perl_cgi.sh文件中的nobody全部用nagios替換，nginx 目錄上的用戶

sed -i 's@nobody@nagios@g' /usr/local/nginx/start_perl_cgi.sh
chmod 755 /usr/local/nginx/start_perl_cgi.sh
/usr/local/nginx/start_perl_cgi.sh start

# 取消用戶認證(方便調試)
vi /usr/local/nagios/etc/cgi.cfg
找到use_authentication=1並把值改爲0
修改聯繫人郵箱，修改爲用於報警接收的郵件地址
vi /usr/local/nagios/etc/objects/contacts.cfg

到這一步就是正常的

下面nginx 配置

我把監聽改成80的了

然後開啓服務

就可以訪問了，然後繼續安裝客戶端，最後給大家截圖看效果

service nagios start

nagios被控端安裝

yum install openssl-devel -y
1. nagios-plugins安裝
groupadd nagios
useradd nagios -M -s /sbin/nologin -g nagios
tar xvf nagios-plugins-1.4.16.tar.gz
cd nagios-plugins-1.4.16
./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-gourp=nagios --with-mysql=/usr/local/mysql && make && make install
cd
2. nrpe安裝
tar zxvf nrpe-2.13.tar.gz
cd nrpe-2.13
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config

啓動nrpe
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
echo '/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d' >> /etc/rc.local

監控服務端本機：自己監控自己不需要配置nrpe，服務端的nrpe只用於獲取客戶端的nrpe傳送過來的數據，在這裏因爲中文版的nagios已經默認有些配置，等會兒修改下直接用了

監控客戶端：監控的服務有：mysql、nginx、memory、ip連接數、僵死的進程、磁盤空間、磁盤IO、登錄用戶數、進程總數、cpu負載、PING、SSH

unzip libexec.zip
\cp libexec/* /usr/local/nagios/libexec
chmod -R +x /usr/local/nagios/libexec

裝插件

創建一個空的數據庫nagios，授權nagios這個用戶從任何地方訪問nagios這個數據庫，刷新授權設置，查詢下nagios這個用戶是否創建成功
create database nagios;
grant select on nagios.* to nagios @'%' identified by '123456';
flush privileges;
select User,Password,Host from mysql.user;

添加mysql庫到系統搜索庫
vim /etc/ld.so.conf
/usr/local/mysql/lib
ldconfig
要監控磁盤io，還得安裝sysstat這個工具包
yum install sysstat -y
配置客戶端上面的nrpe
vim /usr/local/nagios/etc/nrpe.cfg

配置客戶端上面的nrpe
vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
command[check_load]=/usr/local/nagios/libexec/check_cpu.sh -w 80% -c 90%
command[check_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1
command[check_sda2]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda2
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 10%
command[check_iostat]=/usr/local/nagios/libexec/check_iostat.sh -d sda -w 6 -c 10
command[check_mysql]=/usr/local/nagios/libexec/check_mysql -H 192.168.0.22 -u nagios -p 123456 -d nagios
command[check_nginx]=/usr/local/nagios/libexec/check_nginx.sh -u 192.168.0.22 -p /status -w 4000 -c 5000
command[check_mem]=/usr/local/nagios/libexec/check_memory.pl -f -w 20 -c 10
command[check_ip_conn]=/usr/local/nagios/libexec/ip_conn.sh 200 250
command[check_ssh]=/usr/local/nagios/libexec/check_tcp -p 22 -w 1.0 -c 10.0
配置完成後，重啓nrpe
kill `ps aux |grep nrpe |grep -v grep |awk '{print $2}'`
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d
服務端配置：
監控服務端本機的配置：
vim /usr/local/nagios/etc/objects/localhost.cfg
修改裏面的配置，最後修改完成的配置如下
define host{
        use                     linux-server
        host_name               localhost
        alias                   localhost
        address                 127.0.0.1
        icon_p_w_picpath              server.gif
        statusmap_p_w_picpath         server.gd2
    2d_coords       500,200
    3d_coords       500,200,100
        }
define hostgroup{
        hostgroup_name  linux-servers ; The name of the hostgroup
        alias           Linux Servers ; Long name of the group
        members         *     ; Comma separated list of hosts that belong to this group
        }
define servicegroup{
servicegroup_name 全部聯通性檢查
alias 聯通性檢查
          members localhost,PING,nagios-client,PING
          }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       *
        service_description             PING
           check_command            check_ping!100.0,20%!500.0,60%
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             根分區
           check_command            check_local_disk!20%!10%!/
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             登錄用戶數
           check_command            check_local_users!20!50
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             進程總數
           check_command            check_local_procs!250!400!RSZDT
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             系統負荷
           check_command            check_local_load!5.0,4.0,3.0!10.0,6.0,4.0
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             交換空間利用率
           check_command            check_local_swap!20!10
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       localhost
        service_description             SSH
           check_command            check_tcp!22!1.0!10.0
           notifications_enabled        0
        }
服務器監控客戶端的配置：
保存退出後複製這個文件一份，作爲nagios-client的監控模版文件
cp /usr/local/nagios/etc/objects/localhost.cfg /usr/local/nagios/etc/objects/nagios-client.cfg
vim /usr/local/nagios/etc/objects/nagios-client.cfg   修改完成後的配置如下
define host{
        use                     linux-server
        host_name               nagios-client
        alias                   nagios-client
        address                 192.168.0.22
        icon_p_w_picpath              server.gif
        statusmap_p_w_picpath         server.gd2
        2d_coords       500,200
        3d_coords       500,200,100
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       *
        service_description             PING
        check_command           check_ping!100.0,20%!500.0,60%
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             boot分區
        check_command           check_nrpe!check_sda1
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             根分區
        check_command           check_nrpe!check_sda2
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             登錄用戶數
        check_command           check_nrpe!check_users
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             進總程數
        check_command           check_nrpe!check_total_procs
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             CPU平均負載
        check_command           check_nrpe!check_load
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             虛擬內存
        check_command           check_nrpe!check_swap
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             SSH
        check_command           check_nrpe!check_ssh
        notifications_enabled       0
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             僵死進程數
        check_command           check_nrpe!check_zombie_procs
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             iostat
        check_command           check_nrpe!check_iostat
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             mysql
        check_command           check_nrpe!check_mysql
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             nginx
        check_command           check_nrpe!check_nginx
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             memory
        check_command           check_nrpe!check_mem
        }
define service{
        use                             local-service         ; Name of service template to use
        host_name                       nagios-client
        service_description             IP連接數
        check_command           check_nrpe!check_ip_conn
        }

直接把原來的郵件報警的兩條命令中的/bin/mail修改爲/usr/bin/mutt即可，如下圖
                                                                           
加快nagios的報警時間設置:
1.修改模版文件：
vim /usr/local/nagios/etc/objects/templates.cfg
修改所有normal_check_interval項的值爲1，既發現故障後1分鐘就報警
修改所有check_interval項的值爲1，即正常情況下每分鐘檢查一次
修改所有notification_interval  的值爲20分鐘         #在主機出現異常後，故障一直沒有解決，nagios再次對使用者發出通知的時間
service nagios restart    重啓nagios