Nagios详细文档
监控端
一、安装依赖包并设置Apache服务。
yum -y install httpd php gcc gd perl unzip openssl-devel
vi /etc/httpd/conf/httpd.conf
User nagios
Group nagios
<IfModule dir_module>
DirectoryIndex index.php index.html
</IfModule>
systemctl enable httpd
二、安装Nagios-Core包。
tar -xf nagios-4.2.4.tar.gz
useradd -s /sbin/nologin nagios
usermod -G nagios apache
cd nagios-4.2.4
./configure --with-command-group=nagios
make all
make install
make install-init
make install-commandmode
make install-config
make install-webconf
chkconfig --add nagios
chkconfig nagios on
三、安装Nagios扩展包。
tar -xf nagios-plugins-2.1.4.tar.gz
cd nagios-plugins-2.1.4
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make && make install
四、安装nrpe插件。
tar -xf nrpe-3.0.1.tar.gz
cd nrpe-3.0.1
./configure
make all
make install-plugin
五、设置Nagios登陆用户与密码，并启动服务。
cat /etc/httpd/conf.d/nagios.conf
AuthUserFile /usr/local/nagios/etc/htpasswd.users
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
六、配置监控端
vim /usr/local/nagios/etc/objects/client-1.cfg
define host{
use linux-server
host_name client-1
address 192.168.20.20
}
define service{
use local-service
host_name client-1
service_description PING
check_command check-host-alive
}
define service{
use local-service
host_name client-1
service_description HTTP
check_command check_http
}
define service{
use local-service
host_name client-1
service_description BOOT-Usage
check_command check_nrpe!check_sda1
}
define service{
use local-service
host_name client-1
service_description ROOT-Usage
check_command check_nrpe!check_sda3
}
define service{
use local-service
host_name client-1
service_description USERS
check_command check_nrpe!check_users
}
vim /usr/local/nagios/etc/objects/commands.cfg
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
vim /usr/local/nagios/etc/nagios.cfg
cfg_file=/usr/local/nagios/etc/objects/client-1.cfg
cfg_file=/usr/local/nagios/etc/objects/client-2.cfg
systemctl start httpd
systemctl start nagios
被监控端
一、安装依赖包。
yum -y install perl openssl-devel xinetd gcc
二、安装Nagios扩展包。
tar -xf nagios-plugins-2.1.4.tar.gz
useradd -s /sbin/nologin nagios
cd nagios-plugins-2.1.4
./configure
make && make install
三、安装nrpe插件
tar -xf nrpe-3.0.1.tar.gz
cd nrpe-3.0.1
./configure
make all
make install
make install-plugin
make install-daemon
make install-config
make install-inetd
make install-init
四、配置被监控端
vim /usr/local/nagios/etc/nrpe.cfg
command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10
//定义监控登录用户数量的警告及严重错误的阈值分别为5和10
command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c 30,25,20
//定义监控本机CPU负载的警告及严重错误阈值，负载按最近1分钟，5分钟，15分钟分别计算
command[check_sda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda1
//定义监控本机磁盘/dev/sda1的使用情况
command[check_sda3]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda3
//定义监控本机磁盘/dev/sda3的使用情况
command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c 10 -s Z
//定义监控本机僵死进程的警告及严重错误阈值分别为5和10
command[check_total_procs]=/usr/local/nagios/libexec/check_procs -w 150 -c 200
//定义监控进程数量的警告及严重错误阈值分别为150和200
#allowed_hosts=127.0.0.1
vim /etc/xinetd.d/nrpe
only_from = 127.0.0.1 192.168.20.10
systemctl start xinetd
systemctl enable xinetd
systemctl start nrpe
systemctl enable nrpe
在被监控端测试nrpe：
/usr/local/nagios/libexec/check_nrpe -H 127.0.0.1
在监控端测试nrpe：
/usr/local/nagios/libexec/check_nrpe -H 192.168.20.20