nagios
Posted jiashengyang
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ubuntu 16.04 上安装nagios
sudo apt-get install build-essential
sudo agt-get install openssh-server
/etc/init.d/ssh start
服务器端：
安装基础环境：
/*add-apt-repository ppa:ondrej/php
apt-get update
apt-get install apache2
apt-get install php5.6*/
apt-get install wget build-essential apache2 php apache2-mod-php7.0 php-gd libgd-dev sendmail unzip
安装失败的包执行如下命令后继续安装
apt-get update --fix-missing
用户和组配置
Useradd nagios
Groupadd nagcmd
Usermod -a -G nagcmd nagios
usermod -a -G nagios,nagcmd www-data
一、安装Nagios
1.下载源文件
cd ~
wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.2.0.tar.gz
tar -xzf nagios*.tar.gz
cd nagios-4.2.0
2.编译Nagios
构建Nagios之前，必须使用用户和之前创建的组来配置它
./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
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/apache2/sites-available/nagios.conf
并将evenhandler目录复制到nagios目录中：
cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/
chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers
3.安装nagios插件
cd ~
wget https://nagios-plugins.org/download/nagios-plugins-2.1.2.tar.gz
tar -xzf nagios-plugins*.tar.gz
cd nagios-plugin-2.1.2/
./configure --prefix=/data/program/nagios --with-nagios-user=nagios --with-nagios-group=nagios && make && make install
测试已安装的插件,修改nagios.cfg的配置文件,service_check_timeout=300
cd /data/program/nagios/libexec/
./check_ping -H www.baidu.com -w 100.0,10% -c 100.0,30% -p 10 -t 2
/*
报错CRITICAL - Plugin timed out待解决
---------------------------------------------------------------------------------------------------------------------------------
注:nagios-plugins的检测脚本也是需要系统命令的支持，在安装的时候，如果系统里没有相应的命令，对应的脚本是不会安装在系统上面的。如果发现缺少自己想要的脚本，有可能就是系统缺少脚本对应的命令，导致安装检测不到所以才没有装的
*/
4.配置nagios
安装阶段完成后，在/usr/local/nagios/中找到nagios的默认配置
Vim /usr/local/nagios/etc/nagios.cfg
取消注释该配置项
cfg_dir=/usr/local/nagios/etc/servers
新建文件夹
mkdir -p /usr/local/nagios/etc/servers
在contact.cfg文件中配置Nagios联系人
vim /usr/local/nagios/etc/objects/contacts.cfg
vim /usr/local/nagios/etc/objects/templates.cfg
define host{
name generic-host ; The name of this host template
notifications_enabled 1
/usr/local/nagios/etc/objects/commands.cfg
echo "Nagios Test Email " | sendmail -s "Alert" [email protected]@qq.com
二、配置Apache
1.启用apache模块
sudo a2enmod rewrite
Sudo a2enmod cgi
sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
输入密码用于浏览器端登陆
2. 启用nagios虚拟主机
sudo ln -s /etc/apache2/sites-available/nagios.conf /etc/apache2/sites-enabled/
3. 启动Apache和Nagios
service apache2 restart
Service nagios start
/*
启东时可能出错1：Starting nagios (via systemctl): nagios.serviceFailed
解决
cd /etc/init.d/
cp /etc/init.d/skeleton /etc/init.d/nagios
vim /etc/init.d/nagios
添加如下代码
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
*/
可能出错：Failed to start nagios.service
vi /etc/systemd/system/nagios.service
[Unit]
Description=Nagios
BindTo=network.target
[Install]
WantedBy=multi-user.target
[Service]
User=nagios
Group=nagios
Type=simple
ExecStart=/usr/local/nagios/bin/nagios /usr/local/nagios/etc/nagios.cfg
重启nagios
/etc/init.d/nagios restart
执行命令 /etc/init.d/nagios restart
三、测试Nagios服务器
四、添加主机监控
1.安装nrpe服务
apt-get install nagios-nrpe-server nagios-plugins
2.配置nrpe
vim /etc/nagios/nrpe.cfg
暂时可加可不加
server_address = 192.168.238.151
3.重新启动NRPE
service nagios-nrpe-server restart
4.将被监控主机添加到Nagios服务器
接下来操作在nagios服务器端
vim /usr/local/nagios/etc/servers/ubuntu_host.cfg
添加以下行
# Ubuntu Host configuration file
define host {
use linux-server
host_name ubuntu_host
alias ubuntu Host
address 192.168.238.151
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
}
5.检查配置
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
//如果检测不到hosts vim /usr/local/nagios/etc/nagios.cfg去掉server所在行的注释
6.重启所有服务
service nagios-nrpe-server restart
service apache2 restart
service nagios restart
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