Nagios+Apache+Nagios-nrpe-server 配置安装

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版本信息：

Ubuntu 16.04

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参考文献：

https://www.howtoforge.com/tutorial/ubuntu-nagios/

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安装依赖

sudo apt-get install wget build-essential apache2 php apache2-mod-php7.0 php-gd libgd-dev sendmail unzip

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添加group和user

useradd nagios
groupadd nagcmd
usermod -a -G nagcmd nagios
usermod -a -G nagios,nagcmd www-data

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安装 Nagios

• step 1

下载源码&解压：

cd /usr/local
wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.2.0.tar.gz
tar -xzvf nagios-4.2.0.tar.gz

• step 2

编译&安装

cd nagios-4.2.0
./configure --with-nagios-group=nagios --with-command-group=nagcmd
make all
sudo make install
sudo make install-commandmode
sudo make install-init
sudo make install-config
#下面的是同一行
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/apache2/sites-available/nagios.conf

复制文件到目录下&修改权限

cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/
chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers

• Step 3

安装nagios补丁文件

wget https://nagios-plugins.org/download/nagios-plugins-2.1.2.tar.gz
tar -xzf nagios-plugins-2.1.2.tar.gz

编译安装

cd nagios-plugin-2.1.2/
./configure --with-nagios-user=nagios --with-nagios-group=nagios --with-openssl
make
make install

• Step 4

配置nagios文件

vim /usr/local/nagios/etc/nagios.cfg

去掉原文件里面下面内容前面的"#"

cfg_dir=/usr/local/nagios/etc/servers

保存退出
新建文件夹

mkdir -p /usr/local/nagios/etc/servers

修改contacts.cfg配置文件

vim /usr/local/nagios/etc/objects/contacts.cfg

图片.png

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配置Apache

• Step 1

启动Apache模块

sudo a2enmod rewrite
sudo a2enmod cgi

创建密码

sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

启用Nagios虚拟主机

sudo ln -s /etc/apache2/sites-available/nagios.conf /etc/apache2/sites-enabled/

开启Apache和Nagios

cd /etc/init.d/
cp /etc/init.d/skeleton /etc/init.d/nagios
vim /etc/init.d/nagios

添加下面的代码

DESC="Nagios"
NAME=nagios
DAEMON=/usr/local/nagios/bin/$NAME
DAEMON_ARGS="-d /usr/local/nagios/etc/nagios.cfg"
PIDFILE=/usr/local/nagios/var/$NAME.lock

使之可执行并开启服务

chmod +x /etc/init.d/nagios
service apache2 restart
servuce nagios start

若nagios开启失败，可尝试下面的方法：

/etc/init.d/nagios start

开启成功后，可用网页进行查看
输入网址：http://192.168.3.12/nagios
弹出登录的框框

用户名：nagiosadmin
密 码：justdoit

图片.png

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将主机添加到监视器

因为只有一台服务器，尝试可否在同台电脑上配置nagios服务

Nagios Server IP : 192.168.3.12
Ubuntu Host IP : 192.168.3.12

• Step 1

在主机上安装NRPE Service

sudo apt-get install nagios-nrpe-server nagios-plugins

• Step 2

配置 NRPE

vim /etc/nagios/nrpe.cfg

在server_address添加Nagios Server IP 192.168.3.12

server_address=192.168.3.12

图片.png

• Step 3

Restart NRPE

sudo /etc/init.d/nagios-nrpe-server start

注(NRPE之关闭和重启)：
sudo /etc/init.d/nagios-nrpe-server stop
sudo /etc/init.d/nagios-nrpe-server restart

• Step 4

在主机上添加Nagios Server

vim /usr/local/nagios/etc/servers/ubuntu_host.cfg

# Ubuntu Host configuration file

define host {
    use             linux-server
    host_name           ubuntu_host
    alias               Ubuntu Host
    address             192.168.3.12
    register            1
}

define service {
    host_name           ubuntu_host
    service_description     PING
    check_command           check_ping!100.0,20%!500.0,60%
    max_check_attempts      2
    check_interval          2
    retry_interval          2
    check_period            24x7
    check_freshness         1
    contact_groups          admins
    notification_interval       2
    notification_period     24x7
    notifications_enabled       1
    register            1
}

define service {
    host_name           ubuntu_host
    service_description     Check Users
    check_command           check_local_users!20!50
    max_check_attempts      2
    check_interval          2
    retry_interval          2
    check_period            24x7
    check_freshness         1
    contact_groups          admins
    notification_interval       2
    notification_period     24x7
    notifications_enabled       1
    register            1
}

define service {
    host_name           ubuntu_host
    service_description     Local Disk
    check_command           check_local_disk!20%!10%!/
    max_check_attempts      2
    check_interval          2
    retry_interval          2
    check_period            24x7
    check_freshness         1
    contact_groups          admins
    notification_interval       2
    notification_period     24x7
    notifications_enabled       1
    register            1
}

define service {
    host_name           ubuntu_host
    service_description     Check SSH
    check_command           check_ssh
    max_check_attempts      2
    check_interval          2
    retry_interval          2
    check_period            24x7
    check_freshness         1
    contact_groups          admins
    notification_interval       2
    notification_period     24x7
    notifications_enabled       1
    register            1
}

define service {
    host_name           ubuntu_host
    service_description     Total Process
    check_command           check_local_procs!250!400!RSZDT
    max_check_attempts      2
    check_interval          2
    retry_interval          2
    check_period            24x7
    check_freshness         1
    contact_groups          admins
    notification_interval       2
    notification_period     24x7
    notifications_enabled       1
    register            1
}

注：define host里面的额address需要该成被检测计算机的id

查看配置是否正确

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

图片.png

• Step 6

重启各种服务
(1) NRPE Service

sudo /etc/init.d/nagios-nrpe-server restart

(2) Apache and Nagios

service apache2 restart
sudo /etc/init.d/nagios restart

• Step 7

测试是否配置成功：

图片.png

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总结：

这个样子好像就是配置成功了吧！自己半道出家，对这些还不太了解具体是搞毛的，说不出123来。但是，看结果应该是完成了检测的功能。
应该就是可以在同台计算机上配置这个冬冬了，那么，在两台电脑上配置的话，把被检测计算机的id换上就应该没问题了。

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Peopel people for me ,me for people people!!