http://chenhao6.blog.51cto.com/6228054/1323192

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CentOS 6.2+Nginx+Nagios,手机短信和qq邮箱提醒

注：192.168.0.21 服务端

192.168.0.22 客户端

环境：两台centos6.0 64位系统，都已经搭建好了源码的lnmp平台

结尾附上所需的软件包

1.nagios安装（中文版）

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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启动脚本
make install-config     #
安装示例配置文件
make install-commandmode     #
设置相应的目录权限
chmod o+rwx /usr/local/nagios/var/rw

2.nagios-plugins安装

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

3.nrpe安装

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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
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要重启nrpe进行就先杀掉进行，然后重启
kill `ps aux
|grep nrpe
|grep -v grep |awk '{print
$2}'`
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg
-d
本机测试下：
/usr/local/nagios/libexec/check_nrpe -H
localhost -c check_users

加入系统服务

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加入系统服务并设为开机自动
chkconfig
--add nagios
chkconfig
nagios on
chown nagios.nagios /usr/local/nagios/var/rw
#
测试配置文件是否正确
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

添加别名命令，方便测试配置文件

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vi ~/.bashrc
在里面用alias 来自定义一个命令来代替，这里我用check
alias check='/usr/local/nagios/bin/nagios
-v /usr/local/nagios/etc/nagios.cfg'
source ~/.bashrc
此时可以用check命令来检测配置文件了

修改联系人邮箱，修改为用于报警接收的邮件地址

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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
        }
定义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 $ARG1$
}

检测配置文件是否有误

check

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nginx
配置，Nginx fastcgi perl (pl、cgi)支持
安装FCGI模块
cd
tar zxvf
FCGI-0.70.tar.gz
cd FCGI-0.70
perl
Makefile.PL
make
make install
cd
安装
IO 和 IO::ALL模块
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
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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替换，nginx
目录上的用户

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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

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#
取消用户认证(方便调试)
vi /usr/local/nagios/etc/cgi.cfg
找到use_authentication=1并把值改为0
修改联系人邮箱，修改为用于报警接收的邮件地址
vi /usr/local/nagios/etc/objects/contacts.cfg

到这一步就是正常的

下面nginx 配置

我把监听改成80的了

然后开启服务

就可以访问了，然后继续安装客户端，最后给大家截图看效果

service nagios start

nagios被控端安装

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yum install openssl-devel
-y
1.
nagios-plugins安装
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安装
tar zxvf
nrpe-2.13.tar.gz
cd nrpe-2.13
./configure
make all
make install-plugin
make install-daemon
make install-daemon-config
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启动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

监控服务端本机：自己监控自己不需要配置nrpe，服务端的nrpe只用于获取客户端的nrpe传送过来的数据，在这里因为中文版的nagios已经默认有些配置，等会儿修改下直接用了

监控客户端：监控的服务有：mysql、nginx、memory、ip连接数、僵死的进程、磁盘空间、磁盘IO、登录用户数、进程总数、cpu负载、PING、SSH

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

装插件

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创建一个空的数据库nagios，授权nagios这个用户从任何地方访问nagios这个数据库，刷新授权设置，查询下nagios这个用户是否创建成功
create
database nagios;
grant select on
nagios.* to nagios @'%' identified
by '123456';
flush
privileges;
select User,Password,Host
from mysql.user;

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添加mysql库到系统搜索库
vim /etc/ld.so.conf
/usr/local/mysql/lib
ldconfig
要监控磁盘io，还得安装sysstat这个工具包
yum install sysstat
-y
配置客户端上面的nrpe
vim /usr/local/nagios/etc/nrpe.cfg

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配置客户端上面的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
配置完成后，重启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
服务端配置：
监控服务端本机的配置：
vim /usr/local/nagios/etc/objects/localhost.cfg
修改里面的配置，最后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_image             
server.gif
        statusmap_image        
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
全部联通性检查
alias 联通性检查
          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            
根分区
           check_command           
check_local_disk!20%!10%!/
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
localhost
        service_description            
登录用户数
           check_command           
check_local_users!20!50
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
localhost
        service_description            
进程总数
           check_command           
check_local_procs!250!400!RSZDT
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
localhost
        service_description            
系统负荷
           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            
交换空间利用率
           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
        }
服务器监控客户端的配置：
保存退出后复制这个文件一份，作为nagios-client的监控模版文件
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  
修改完成后的配置如下
define
host{
        use                    
linux-server
        host_name              
nagios-client
        alias                   nagios-client
        address                
192.168.0.22
        icon_image             
server.gif
        statusmap_image        
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分区
        check_command          
check_nrpe!check_sda1
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
nagios-client
        service_description            
根分区
        check_command          
check_nrpe!check_sda2
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
nagios-client
        service_description            
登录用户数
        check_command          
check_nrpe!check_users
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
nagios-client
        service_description            
进总程数
        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平均负载
        check_command          
check_nrpe!check_load
        }
define
service{
        use                             local-service        
; Name of service template to use
        host_name                      
nagios-client
        service_description            
虚拟内存
        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            
僵死进程数
        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连接数
        check_command          
check_nrpe!check_ip_conn
        }

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直接把原来的邮件报警的两条命令中的/bin/mail修改为/usr/bin/mutt即可，如下图
                                                                            
加快nagios的报警时间设置:
1.修改模版文件：
vim /usr/local/nagios/etc/objects/templates.cfg
修改所有normal_check_interval项的值为1，既发现故障后1分钟就报警
修改所有check_interval项的值为1，即正常情况下每分钟检查一次
修改所有notification_interval 
的值为20分钟         #在主机出现异常后，故障一直没有解决，nagios再次对使用者发出通知的时间
service
nagios restart    重启nagios

测试告警：

试验完成！

附上软件包所需软件地址

缺的软件可以直接找我要！

http://down.51cto.com/data/1007210

本文出自 “浩子的▁运维笔录ヽ” 博客，请务必保留此出处http://chenhao6.blog.51cto.com/6228054/1323192

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