nagios监控

1 安装nagios

tar jxf nagios-cn-3.2.3tar.bz2
yum install gd-deverl-2.0.35-11.el.x86_64.rpm 
cd nagios-cn-3.2.3
groupadd nagcmd
useradd -M  -d /usr/local/nagios  -G  nagcmd  nagios  ##创建用户nagios并使他从属于nagcmd组##
usermod  -G   nagcmd   apache  ##将apache加入nagcmd组
./configure  --with-command-group=nagcmd  ##配置编译环境中的指定组为nagcmd
make all  ##编译
make install  ##安装
make install-init  ##安装启动脚本
make install-config  ##安装配置文件
make install-commandmode  ##安装命令模式
make install-webconf  ##安装网页配置文件
htpasswd /usr/local/nagios/etc/htpasswd.users  nagiosadmin  ##设定nagios的登陆密码
/usr/local/nagios/bin/nagios  -v  /usr/local/nagios/etc/nagios.cfg  ##检测是否正确
/etc/init.d/nagios  start  ##启动nagios


Nagios_第1张图片


 

2 安装nagios插件

tar zxf  nagios-plugin-1.4.14.tar.gz
cd  nagios-plugin-1.4.14
yum  install  mysql-deverl  openssl-devel -y  
./configure  
make  ##编译
make install  ##安装
cd  /usr/local/nagios/libexec/  ##进入nagios插件的目录下
chown  nagios.nagios *  -R  ##将该目录下文件权限都改成nagios所有组和所有用户
/usr/local/nagios/bin/nagios  -v  /usr/local/nagios/etc/nagios.cfg  ##检测是否正确
/etc/init.d/nagios  reload  ##重新加载nagios


Nagios_第2张图片

 

3 nagios配置

cd /usr/local/nagios/etc/
vim nagios.cfg  ##编辑nagios的主配置文件
cfg_file=/usr/local/nagios/etc/objects/hosts.cfg  
cfg_file=/usr/local/nagios/etc/objects/services.cfg
cd objects/
cp -p localhost.cfg host.cfg  ##复制示例到host.cfg
cp -p localhost.cfg services.cfg  ##复制示例到services.cfg
vim /usr/local/nagios/etc/objects/hosts.cfg
define host {
       use                     linux-server
     host_name               server3.example.com  ##改主机名
      address                 172.25.35.3  ##改地址
       alias                    Manager
#      parents                 MainSwitch  ##由于只监控一台主机所有注销掉关联主机
       icon_p_w_picpath              server.gif
       statusmap_p_w_picpath         server.gd2
       2d_coords               500,200
       3d_coords               500,200,100
       } 
vim /usr/local/nagios/etc/objects/services.cfg
:%s/田朝阳家用机/server3.example.com/g
define servicegroup{
       servicegroup_name 系统负荷检查
       alias 负荷检查
       Members  server3.example.com,进程总数,server3.example.com,登录用户数,server3.example.com,根分区,server3.example.com,交换空间利用率
        }
/usr/local/nagios/bin/nagios  -v  /usr/local/nagios/etc/nagios.cfg  ##检测nagios配置是否正确
/etc/init.d/nagios  reload  ##重新加载nagios
http://172.25.35.3/nagios  ##访问nagios


 

4 添加监控数据库mysql

在server2上：
yum  install -y mysql-server  ##安装
/etc/init.d/mysqld  start  ##开启
mysql_secure_installation  ##数据库安全初始化，设置密码:westos
mysql -pwestos  ##用root用户登录
mysql> create database nagdb;  ##建立数据库nagdb
mysql> grant select on nagdb.* to nagios@'172.25.35.3' identified by 'nagios';  ##给用户nagios授权，设定登陆密码为nagios
 
在server3上：
cd /usr/local/nagios/libexec/
check_mysql -H 172.25.35.2 -u nagios -p nagios  ##检测能否连上server2的mysql
在nagios上添加对mysql监控的定义：
cd /usr/local/nagios/etc/objects/
vim commands.cfg
####'check_mysql'command definition####
define command{
       command_name check_mysql
       command_line $USER1$/check_mysql -H $HOSTADDRESS$ -u $ARG1$   -p $ARG2$
       }
vim services.cfg
####check_mysql####
define service {
       use                    local-service
       host_name              server2.example.com
       service_description    MYSQL
       check_command          check_mysql!nagios!nagios
       }
vim hosts.cfg
define host {
       use                     linux-server
       host_name               server2.example.com  ##改主机名
       address                 172.25.35.2  ##改地址
       alias                   server2
       parents                 server3.example.com  ##与server3建立关联
       icon_p_w_picpath              server.gif
       statusmap_p_w_picpath         server.gd2
       2d_coords               400,100
       3d_coords               400,100,100
       } 
/usr/local/nagios/bin/nagios  -v  /usr/local/nagios/etc/nagios.cfg  ##检测nagios配置是否正确
/etc/init.d/nagios  reload  ##重新加载nagios


Nagios_第3张图片

 

5 安装nrpe

在server2上：
tar zxf nrpe-2.15.tar.gz
yum  install -y gcc nagios-plugins-2.1.1 openssl-devel mysql-devel
cd nrpe-2.15/docs/
useradd -M -d /usr/local/nagios  nagios  ##建立nagios用户
cd nrpe-plugins-2.1.1/
./configure 
make  all
make  install
cd /usr/local/nagios/
chown nagios.nagios  .  -R  ##把当前目录下的文件全改成nagios的所有用户和所有组
yum  install -y xinetd 
cd nrpe-2.15/
make install-plugin
make install-daemon
make install-daemon-config
make install-xinetd


 

6 配置nrpe

cd nrpe2-15/etc/xinetd/
vim nrpe
only_from = 172.25.35.3  ##nagios的IP
vim /etc/services
nrpe 5666/tcp  ##nrpe的端口为5666
/etc/init.d/xinetd start  ##启动xinetd
cd /usr/local/nagios/etc/
vim  nrpe.cfg
command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /  ##监控根分区
/etc/init.d/xinetd restart  ##重启xinetd服务
scp check_nrpe 172.25.35.3:/usr/local/nagios/libexec/  ##将nrpe传到server3上
 
在server3上：
cd  /usr/local/nagios/libexec/
chown nagios.nagios check_nrpe  ##将check_nrpe的所有人所有组都改成nagios
./check_nrpe -H 172.25.35.2 
./check_nrpe -H 172.25.35.2 -c check_disk  ##监控磁盘的状况
vim  /usr/local/nagios/etc/objects/commands.cfg
####'check_nrpe'command definition####
define command{
       command_name check_nrpe
       command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
       }
vim  /usr/local/nagios/etc/objects/services.cfg
####check_nrpe####
define service {
       use                    local-service
       host_name              server2.example.com
       service_description    根分区
       check_command          check_nrpe!check_disk
       }
define service {
       use                    local-service
       host_name              server2.example.com
       service_description    登陆用户数
       check_command          check_nrpe!check_users
       }
cd  /usr/local/nagios/etc/objects/
/usr/local/nagios/bin/nagios  -v  /usr/local/nagios/etc/nagios.cfg 
/etc/init.d/nagios  reload