Nagios的安装与配置详解

yum groupinstall -y 'Development Libraries' 'Development Tools" 'Legacy Software Development' 'X Software Development'

yum -y install httpd gcc glibc glibc-common *gd* php php-mysql mysql mysql-server mysql-devel openssl-devel
# 安装Nagios必须的基本组件的运行依赖于httpd、mysql、gd以及编译用到的gcc

groupadd nagcmd
#添加与nagios运行相关服务的组
useradd -m nagios
#添加nagios用户
usermod -a -G nagcmd nagios
#将nagios用户追加附加组
usermod -a -G nagcmd apache
#将apache用户追加nagcmd组使之工作时具有足够的权限

tar xvf nagios-3.3.1.tar.gz
cd nagios
# ./configure --with-command-group=nagcmd --enable-event-broker
#默认安装路径在/usr/local/nagios/
make all && make install && make install-init && make install-config && make install-commandmode && make install-webconf
#安装主程序、添加初始化程序、生成配置文件、生成web配置文件

htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
New password:
Re-type new password:
Adding password for user nagios
#为nagios的web页面创建账号密码，对访问进行身份认证
service httpd restart
chkconfig httpd on
#启动httpd，并设置开机启动

tar xvf nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure --with-nagios-user=nagios --with-nagios-group=nagios --with-mysql
#添加mysql依赖
make && make install
#编译并安装
Ps：作者在安装nagios-cn-3.2.3.tar过程中，在此处编译完成发现mysql关联库文件本跳过。经分析原因是由于在编译nagios时修改了nagios的默认安装路径（非/usr/local/nagios）。 解决办法：

cp /usr/lib/mysql/mysql_config /usr/lib/pkgconfig/
#将mysql的配置文件放在这个目录下使之能够在编译过程中读到相关配置选项
再进行编译安装nagios-plugins

chkconfig --add nagios
chkconfig nagios on
#添加nagios到开机启动项
vim /etc/profile
PATH=$PATH:/usr/local/nagios/bin
#向profile加入这一行，指明nagios命令的path
. /etc/profile
nagios -v /usr/local/nagios/etc/nagios.cfg
#检查配置文件的语法
service nagios start
#如语法监测为报错则尝试开启服务

方法一、直接关闭selinux
getenforce
#查看selinux的运行状态
setenforce 0
#如果是enforce（开启）状态，则关闭
Ps：如果您想在今后的使用中完全关闭selinux，可以通过编辑/etc/sysconfig/selinux文件，将其中的selinux后面的值“force”修改为“disable”即可。

方法二、修改相关文件的type
chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin
chcon -R -t httpd_sys_content_t /usr/local/nagios/share
#进行这些操作就可以在selinux开启的状态下正常访问nagios

vim /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/windows.cfg
#将这一行注释去掉

vim /usr/local/nagios/etc/objects/windows.cfg
define host{
use windows-server ; Inherit default values from a template
host_name winserver ; The name we're giving to this host
alias My Windows Server ; A longer name associated with the host
address 192.168.0.72 ; windowsIP
}
#修改IP，此ip为windows主机IP

tar xvf nrpe-2.12.tar
cd nrpe-2.12
./configure --enable-ssl --with-ssl-lib=/lib/
make all && make install-plugin

vi /usr/local/nagios/etc/objects/commands.cfg
#check nrpe
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
#在末行添加这些内容

vim /usr/local/nagios/etc/objects/mylinux.cfg
define host{
use linux-server
host_name mylinux
alias mylinux
address 192.168.1.2#客户端IP即被监控的IP
}

define service{
use generic-service
host_name mylinux
service_description check-load
check_command check_nrpe!check_load
}
define service{
use generic-service
host_name mylinux
service_description check-users
check_command check_nrpe!check_users
}
define service{
use generic-service
host_name mylinux
service_description otal_procs
check_command check_nrpe!check_total_procs
}
chown -R nagios:nagios mylinux.cfg

#修改配置文件的属主属组

vim /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/mylinux.cfg
#在主配置文件指明linux主机的配置文件路径

useradd nagios

tar zxf nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make && make install

yum install openssl-devel
#先安装openssl解决依赖
tar -zxvf nrpe-2.12.tar.gz
cd nrpe-2.12.tar.gz
./configure --enable-ssl --with-ssl-lib=/usr/lib/
make all && make install-plugin && make install-daemon && make install-daemon-config
#编译安装

vim /usr/local/nagios/etc/nrpe.cfg
allowed_hosts=192.168.1.1
#监控端的IP
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg –d
#开启进程

service nagiso restart

yum install mysql mysql-server
#简单起见yum安装mysql
service mysqld start
#启动mysql
mysqladmin -uroot -p password '123456'
#给root用户创建mysql密码
mysql -uroot -p
#进入mysql
mysql> create database nagios;
#创建数据库
mysql> grant select on nagios.* to nagios@'%' identified by 'redhat';
#给nagios用户赋予查询权限
mysql> flush privileges;
#刷新特权表

vim /usr/local/nagios/etc/objects/command.cfg
#check mysql
define command{
command_name check_mysql
command_line $USER1$/check_mysql -H 192.168.1.2 -u nagios -d nagios -p redhat
}
#在命令配置文件中添加这些字段

vim /usr/local/nagios/etc/objects/mylinux.cfg
define service{
use generic-service
host_name mylinux
service_description check_mysql
check_command check_mysql
}
#在linux主机配置文件中定义服务

service nagios restart

unzip fetion.zip
cd ../fetion
mv fetion /usr/bin/
#将飞信脚本放在/usr/lib
chmod +x /usr/bin/fetion
#添加执行权限
mv ./* /usr/lib
#将剩余所有库文件移动到/usr/lib

vim /usr/local/nagios/etc/templates.cfg
define contact{
name generic-contact
service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r,f,s
host_notification_options d,u,r,f,s
service_notification_commands notify-service-by-fetion
host_notification_commands notify-host-by-fetion
register 0
}
#修改成上面字段

vim /usr/local/nagios/etc/commands.cfg
commands.cfg
define command{
command_name notify-service-by-fetion
command_line /usr/bin/fetion --mobile 您的手机号 --pwd 您的飞信密码 --to 您的手机号 --msg-tpye=0 --msg-utf8 $HOSTNAME
}
#添加这些字段