第 4 章 在 Nagios 核心服务器上配置远程节点

流程

1. 安装 check_nrpe 插件：

   示例

   [root@nagios ~]# cd ~
   [root@nagios ~]# wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz
   [root@nagios ~]# tar xvfz nrpe-4.0.3.tar.gz
   [root@nagios ~]# cd nrpe-4.0.3
   [root@nagios nrpe-4.0.3]# ./configure
   [root@nagios nrpe-4.0.3]# make check_nrpe
   [root@nagios nrpe-4.0.3]# make install-plugin

2. 为远程主机创建配置：

   语法

    cd /usr/local/nagios/etc/objects
    cp localhost.cfg HOST_TO_ADD.cfg

   示例

   [root@nagios nrpe-4.0.3]# cd /usr/local/nagios/etc/objects
   [root@nagios objects]# cp localhost.cfg host01.cfg

3. 编辑配置文件并更新远程主机的设置：

   语法

   vi HOST_TO_ADD.cfg

   示例

   [root@nagios objects]# vi host01.cfg

   语法

   # Define a host for the local machine
   
   define host {
   
       use     linux-server    ; Name of host template to use
                               ; This host definition will inherit all variables that are defined
                               ; in (or inherited by) the linux-server host template definition.
       host_name               LOCALHOST
       alias                   LOCALHOST
       address                 127.0.0.1
   }

   将 LOCALHOST 替换为远程主机的主机名，将 127.0.0.1 替换为 Ceph 监控主机的 IP 地址。

   示例

   # Define a host for the local machine
   
   define host {
       use     linux-server   ; Name of host template to use
                              ; This host definition will inherit all variables that are defined
                              ; in (or inherited by) the linux-server host template definition.
       host_name               host01
       alias                   host01
       address                 10.10.128.69
   }

4. 删除或注释掉主机组定义：

   示例

   [root@nagios objects]# vi host01.cfg

   #define hostgroup {
   #
   #    hostgroup_name          linux-servers           ; The name of the hostgroup
   #    alias                   Linux Servers           ; Long name of the group
   #    members                 localhost               ; Comma separated list of hosts that belong to this group
   #}

5. 将文件所有权改为 Nagios：

   示例

   [root@nagios objects]# chown nagios:nagios host01.cfg

6. 向 /usr/local/nagios/etc/nagios.cfg 中的 host01.cfg 文件添加 cfg_file= 引用：

   示例

   [root@nagios objects]# vi /usr/local/nagios/etc/nagios.cfg

   cfg_file=/usr/local/nagios/etc/objects/host01.cfg

7. 重启 Nagios 服务器：

   示例

   [root@nagios objects]# systemctl restart nagios

8. 确保 make 和 install 过程可以正常工作，并且 Nagios 核心服务器和包含 NRPE 的远程主机之间存在连接：

   语法

   /usr/local/nagios/libexec/check_nrpe -H HOSTNAME_OF_REMOTE_HOST

   将 HOSTNAME_OF_REMOTE_HOST 替换为要监控的 Ceph 主机的 IP 地址。

   示例

   [root@nagios objects]# /usr/local/nagios/libexec/check_nrpe -H host01