Red Hat上的Nagios安装配置

Red Hat上的Nagios安装配置

Nagios简介

Nagios是一款开源的监控工具，用于监控网络、服务器和应用程序的可用性，它可以发现并修复在基础架构中检测到的问题，从而帮助您确保关键任务的高可用性，Nagios最初是由Trent Mick是一个IT专业人员在基于Unix的系统上开发的，后来成为了一个独立的公司，并发展成一个跨平台的解决方案，Red Hat作为一款流行的Linux发行版，也可以使用Nagios进行监控。

安装前的准备工作

1、确保您的Red Hat系统已经更新到最新版本，可以使用以下命令进行更新：

```

sudo yum update

```

2、安装EPEL(Extra Packages for Enterprise Linux)仓库，以便获取Nagios所需的依赖包：

```

sudo yum install epel-release

```

3、安装Nagios Core:

```

sudo yum install nagios-core

```

4、启动并设置开机自启动Nagios服务：

```

sudo systemctl start nagios

sudo systemctl enable nagios

```

5、创建一个新的系统用户和组，用于运行Nagios服务：

```

sudo groupadd nagcmd

sudo useradd --system --gid nagcmd --home-dir /usr/local/nagios --shell /bin/false nagios

```

6、将Nagios的可执行文件目录复制到新创建的用户主目录下：

```

sudo cp -R /usr/local/nagios/* /usr/local/nagios/nagios_user/

```

7、为新用户设置密码：

```

sudo passwd nagios

```

8、将新的用户添加到nagcmd组：

```

sudo usermod -aG nagcmd nagios

```

9、以新用户身份登录Nagios:

```

su nagios

```

Nagios配置文件解析与修改(以配置主机为例)

1、在Nagios安装目录下，找到名为“conf”的文件夹，其中包含了Nagios的主要配置文件，如“nagios.cfg”等，使用文本编辑器打开“nagios.cfg”文件：

```

vi $NAGIOS_HOME/etc/nagios.cfg

```

2、在“nagios.cfg”文件中，找到名为“host”的部分，这里定义了要监控的主机，要监控名为“example.com”的主机，可以在“host”部分添加以下内容：

```

define host{

use generic-service;

host_name example.com; 要监控的主机名或IP地址

alias example-host; 为主机设置别名(可选)

address 192.168.1.100; 要监控的主机IP地址(必填)

} end of host definition block (optional) noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-do not remove this line or the related comment --> noqa E501 W395 <!-donotremovethislineortherelatedcomment--> END OF NAGIOS.CF$VGHOSTS$VHOSTDEFS$HDEFS$GLOBALDEFS$RESOURCEDEFS$OBJECTDEFS$SERVICEDEFS$CONTACTGROUPDEFS$HOSTCLASSDEFS$SCHEDULEDEFS$NOTIFICATIONS$LOGFILES$CONFIGFILE$ARGUMENTS } END OF nagios.cfg file **************************** [Related Question] **************************** "