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分类: IT职场

2012-08-31 14:29:19

linux主机开源nagios监控部署
 
系统环境:rhel6.0 x86-64 selinux and iptables off
nagios主机:192.168.0.1
mysql主机:192.168.0.13
 

192.168.0.1做如下操作,配置nagios主机

 

配置编译环境:

yum install httpd gcc make gd-devel perl-ExtUtils-Embed.x86_64 -y

 

注意:gd-devel系统自带的软件包里没有

 

useradd nagios                         #运行nagios服务的用户

useradd -G nagios apache       #使apache用户nagios目录有写权限,以免web页面操作失败

 

软件下载:

 

---->nagios服务软件安装

tar -jxf nagios-cn-3.2.3.tar.bz2

cd nagios-cn-3.2.3

./configure   --enable-embedded-perl

make all

make install

make install-init

make install-commandmode

make install-config

make install-webconf

 

---->nagios插件安装

yum install  mysql-devel openssl-devel -y

tar -zxf nagios-plugins-1.4.15.tar.gz

cd nagios-plugins-1.4.15

./configure -–with-nagios-user=nagios –-with-nagios-group=nagios

 -–enable-extra-opts    -–enable-libtap   --enable-perl-modules

make; make install

 

---->nagios文件配置

vim /usr/local/nagios/etc/nagios.cfg

....

# Definitions for monitoring the local (Linux) host

 cfg_file=/usr/local/nagios/etc/objects/hosts.cfg      # hosts.cfg文件存放主机与主机组定义

 cfg_file=/usr/local/nagios/etc/objects/services.cfg   # services.cfg文件存放服务与服务组定义

#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg  #注释localhost.cfg文件

 

注:彩色区域为编辑区,hosts.cfg and services.cfg文件模板均来自同目录下的localhost.cfg

可以通过cp localhost.cfg hosts.cfg cp localhost.cfg services.cfg的方式产生hosts.cfg

services.cfg文件,然后在通过修改这两个文件,使之成为目标文件。不建议通过vim 之间直接

编辑文件,可能对格式又要求,会产生格式错误,这往往是很隐蔽的错误。最好还是先拷贝,

在编辑。把文件中多余的部分删掉,或注释掉

 

---->此实验的目标文件hosts.cfg and services.cfg内容如下:

vim /usr/local/nagios/etc/objects/hosts.cfg

 # Define a host for the local machine

 define host{

         use                     linux-server               

         host_name               monitor

         alias                   nagios server

         address                 127.0.0.1

         icon_image              web.gif

         statusmap_image         web.gd2

         2d_coords               100,200

         3d_coords               100,200,100

         }

 

 define hostgroup{           #主机组并不是必须的。仅是配合nagios的监控页面的显示

         hostgroup_name  linux-servers            

         alias           Linux Servers                      

         members         *                                     

         }

 

vim /usr/local/nagios/etc/objects/services.cfg

 define service{

           use                             local-service        

           host_name                       *

           service_description             PING

           check_command                   check_ping!100.0,20%!500.0,60%

           }

  

 define service{

          use                             local-service       

          host_name                       monitor

          service_description             根分区

          check_command                   check_local_disk!20%!10%!/

          }

 

 define service{

          use                             local-service        

          host_name                       monitor

          service_description             登录用户数

          check_command                   check_local_users!20!50

          }

 

 define service{

          use                             local-service        

          host_name                       monitor

          service_description             进程总数

          check_command                   check_local_procs!250!400!RSZDT

          }

 

  define service{

          use                             local-service         

          host_name                       monitor

          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        

          host_name                       monitor

          service_description             交换空间利用率

          check_command                   check_local_swap!20!10

          }

 

  define servicegroup{                #主机组并不是必须的。仅是配合nagios的监控页面的显示

          servicegroup_name               系统状况检查

          alias                           系统概况

           members  monitor,进程总数,monitor,登录用户数,monitor,根分区,monitor,交换空间利用率

          }

 

---->检测nagios配置文件的正确性

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

---->nagios监控页面访问用户和密码设定

htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

 

---->启动nagios and httpd服务,以备首次登录nagios页面

/etc/init.d/nagios start

/etc/init.d/httpd start

 

 

输入上面添加的用户名和密码登录

 

 

192.168.0.13配置mysql主机

 

----> mysql主机创建检测监控账户

mysql> create database nagdb;

Query OK, 1 row affected (0.12 sec)

 

mysql> grant select on nagdb.* to nagios@'192.168.0.1';

Query OK, 0 rows affected (0.16 sec)

 

mysql> flush privileges;

Query OK, 0 rows affected (0.07 sec)

 

---->nagios主机测试你是否可以连接到mysql主机的mysql服务

/usr/local/nagios/libexec/check_mysql -H 192.168.0.13 -u nagios -d nagdb

[root@server1 ~]# /usr/local/nagios/libexec/check_mysql -H 192.168.0.13 -u nagios -d nagdb

Uptime: 47133  Threads: 15  Questions: 59930  Slow queries: 0  Opens: 510  Flush tables: 1

 Open tables: 64  Queries per second avg: 1.271

 

 

nagios主机上添加对mysql主机的监控定义

 

---->hosts.cfg添加如下行

vim /usr/local/nagios/etc/objects/hosts.cfg

  define host{

          use                     linux-server           

          host_name               mysql host

          alias                   mysql server

          address                 192.168.0.13

          icon_image              web.gif

          statusmap_image         web.gd2

          2d_coords               300,500

          3d_coords               500,200,100                                                                          

          }

 

---->services.cfg添加如下行

vim /usr/local/nagios/etc/objects/services.cfg

  define service{

          use                   local-service

          host_name        mysql host

          service_description            mysql  服务组

          check_command                check_mysql                                                                          

          }

 

  define servicegroup{

          servicegroup_name           mysql 服务组

          alias                                   mysql 服务器

          }

 

---->commands.cfg添加下面行

vim /usr/local/nagios/etc/objects/commands.cfg

  define command{

         command_name check_mysql

         command_line $USER1$check_mysql -H $HOSTADDRESS$ -u nagios  -d nagdb

         }

 

 

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

---->检测无错后重载nagios

/etc/init.d/nagios reload

 

 

 

Nagios通过Nrpe监控主机状况

 

 

远程主机设定

useradd nagios

tar zxf nagios-plugins-1.4.15.tar.gz                  #nagios插件安装

cd nagios-plugins-1.4.15

./configure –with-nagios-user=nagios –with-nagios-group=nagios –enable-perl-modules

–enable-extra-opts   --enable-libtap 

 

make; make install

 

yum install xinetd  -y

 

tar -zxf nrpe-2.12.tar.gz

cd nrpe-2.12

./configure

make all

make install-plugin

make install-daemon

make install-daemon-config

make install-xinetd

 

 

vim /erc/xinetd.d/nrpe 修改如下行

only_from       = 192.168.0.1                  #nagios主机IP

 

vim /etc/services  添加如下行

nrpe            5666/tcp                             #添加nrpe服务监听端口

 

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_load -w 15,10,5 -c 30,25,20

command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /           #根分区监测

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

....

 

/etc/init.d/xinetd restart

 

[root@server13 ~]# netstat -antlp  | grep 5666 有如下输出说明nrpe正常启动

tcp        0      0 :::5666                     :::*                        LISTEN      5793/xinetd

 

 

监控(nagios)主机设定

 

软件下载:

tar -zxf nrpe-2.12.tar.gz

cd nrpe-2.12

./configure –with-nagios-user=nagios –with-ngios-group=nagios

make all

make install-plugin

 

---->有如下输出表示连接正常

[ ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.0.13

NRPE v2.12

 

 

vim /usr/local/nagios/etc/objects/commands.cfg 添加如下行

define command{

         command_name    check_nrpe

         command_line    $USER1$check_nrpe -H $HOSTADDRESS$ -c $ARG1$                                                 

         }

 

---->测试远程主机的 / 的使用率

[ ~]# cd /usr/local/nagios/libexec/

[ ~]#./check_nrpe -H 192.168.0.13 -c check_disk

DISK OK - free space: / 2714 MB (47% inode=70%);| /=2984MB;4803;5403;0;6004

 

vim /usr/local/nagios/etc/objects/services.cfg 添加如下行

 define service{

         use                             local-service           #generic-service

         host_name                       mysql host

         service_description             CPU Load

         check_command                   check_nrpe!check_load

         }

 

  define service{

         use                             local-service       #generic-service

         host_name                       mysql host

         service_description             Current Users

         check_command                   check_nrpe!check_users

         }

 

  define service{

         use                             local-service        #generic-service

         host_name                       mysql host

         service_description             / Free Space

         check_command                   check_nrpe!check_disk

         }

 

  define service{

         use                             local-service        #generic-service

        host_name                       mysql host

        service_description             Total Processes

        check_command                   check_nrpe!check_total_procs

        }

 

 define service{

        use                             local-service        #generic-service

        host_name                       mysql host

        service_description             Zombie Processes

        check_command                   check_nrpe!check_zombie_procs

        }

 

  define servicegroup{

        servicegroup_name database

        alias mysql

         members mysql host,CPU Load,mysql host, / Free space   #根据需要添加成员

        }

 

/usr/local/nagios/bin/nagios -v /usr/loca/nagios/etc/nagios.cfg       #检测文件无误后重载nagios服务

 

/etc/init.d/nagios reload

 

url=显示文件编辑后页面变化

 

 

 

nagios整合fection/实现故障报警

下载飞信软件与支持库:/

cp fetion  /usr/local/nagios/libexec

chmod +x /usr/local/nagios/libexec/fetion

chown nagios.nagios /usr/local/nagios/libexec/fetion

 

 

tar -zxf linuxso_20101113.tar.gz -C /usr/local/lib

chmod +x /usr/local/lib/*

ldconfig /usr/local/lib/

 

编辑下面文件将fetion模块的路径写入文件后,执行ldconfig

这样做可避免多次执行ldconfig /usr/local/lib/

vim /etc/ld.so.conf.d/fetion.conf

/usr/local/lib

 

ldconfig         #使上面的更改生效

 

yum install keyutils-libs libcom_err libselinux krb5-libs zlib -y

 

####nagios身份运行以下命令

[ ~]$ /usr/local/nagios/libexec/fetion --mobile=152********  --pwd=飞信密码

--to=152********  --msg-utf8=”Good Luck”

注:第一次发飞信,要求输入验证码,生成验证码的图片在/usr/local/nagios/libexec/                            

 

####以脚本的方式实现飞信的发送

vim /usr/local/nagios/libexec/fetion.sh

/usr/local/nagios/libexec/fetion --mobile=152********  --pwd=飞信密码 --to=”$1” 

--msg-utf8=”$2”  > /dev/null

 

chmod +x /usr/local/nagios/libexec/fetion.sh

chown nagios.nagios  /usr/local/nagios/libexec/fetion.sh

/usr/local/nagios/libexev/fetion.sh 152********  “hello world”

 

####编辑文件添加红色字体语句

vim /usr/local/nagios/etc/objects/templates.cfg

        service_notification_commands   notify-service-by-email, notify-service-by-fetion       

        host_notification_commands      notify-host-by-email, notify-host-by-fetion  

 

vim /usr/local/nagios/etc/objects/commands.cfg

#'notify-host-by-fetion' command definition

define command{

        command_name    notify-host-by-fetion

        command_line    $USER1$/fetion.sh $CONTACTPAGER$ "$NOTIFICATIONTYPE$

Host Alert: $HOSTNAME$ is $HOSTSTATE$"

        }

 

#'notify-service-by-fetion' command definition

define command{

        command_name    notify-service-by-fetion

        command_line    $USER1$/fetion.sh $CONTACTPAGER$ "$NOTIFICATIONTYPE$

Service Alert: $HOSTTALIAS$/$SERVICEDESC$ is $SERVICESTATE$"

        }

 

vim /usr/local/nagios/etc/objects/contacts.cfg

....

                   email             

                   pager             152********                                                                         

....

 

 

下来就可以测试了,尝试着制造几个故障,在将故障排除看是否会收到飞信和邮件的报警信息。

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