nagios-4.0.8 安装部署

1.Nagios工作原理

Nagios周期性调用插件检测服务器状态，并维持一个队列，所有插件返回状态信息都进入队列，Nagios每次从队首开始读取信息，并把状态通过web显示。

安装完成后，在nagios主目录下/libexec放有nagios自带所有插件，如check_disk检查磁盘空间插

2.安装阿里源

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum clean all && yum makecache fast
#安装epel源
yum install -y epel-release
yum makecache fast

3.服务器端

#安装httpd和php
yum install -y httpd
yum install -y php php-cli php-common
#下载
cd /opt
wget http://nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz
wget https://github.com/NagiosEnterprises/nrpe/archive/nrpe-3.0.tar.gz
[root@localhost opt]# ll
总用量 14052
-rw-r--r-- 1 root root 11155576 3月 7 17:04 nagios-4.2.1.tar.gz
-rw-r--r-- 1 root root 2695301 3月 7 17:04 nagios-plugins-2.1.2.tar.gz
-rw-r--r-- 1 root root 518015 3月 7 17:04 nrpe-3.2.1.tar.gz

#解压
tar axf nagios-4.2.1.tar.gz
tar axf nagios-plugins-2.1.2.tar.gz
tar axf nrpe-3.2.1.tar.gz

4.安装依赖包

#服务器端
yum install -y gcc glibc gcc-c++ make cmake unzip glibc-common gd gd-devel php perl-devel mysql-server openssl-devel
#客户端依赖 
yum install -y gcc glibc make cmake glibc-common gd gd-devel php perl-devel mysql-server openssl-devel

5.编译安装nagios

mkdir /usr/local/nagios
cd nagios-4.2.1
./configure --prefix=/usr/local/nagios
make

make install

make install-config  # 把配置文件样例复制到nagios的安装目录
make install-commandmode # 给外部命令访问nagios配置文件的权限
make install-init  # 把nagios做成一个运行脚本，使nagios随系统开机启动

6.编译安装nagios-plugin

cd /opt/nagios-plugins-2.1.2
./configure --prefix=/usr/local/nagios
make && make install && echo $?

7.编译安装nrpe

cd /opt/nrpe-3.2.1
./configure --prefix=/usr/local/nagios --enable-command-args
编译
make all
安装
添加nagios用户
make install-groups-users
安装
make install
添加主配置文件
make install-config
配置xinetd
make install-inetd
设置nrpe管理命令
make install-init
编译插件
make check_nrpe
安装插件
make install-plugin

7.修改nrpe配置

#先备份
cp /usr/local/nagios/etc/nrpe.cfg{,.bak}
#将hda1改为sda
command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/sda
#启动nrpe
/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d

8.修改httpd配置

#先备份
cp /etc/httpd/conf/httpd.conf{,.bak}
vim /etc/httpd/conf/httpd.conf
#在文件最后添加

ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin"
<Directory "/usr/local/nagios/sbin">
     AuthType Basic
     Options ExecCGI
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName "Nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd
     Require valid-user
</Directory>
Alias /nagios "/usr/local/nagios/share"
<Directory "/usr/local/nagios/share">
     AuthType Basic
     Options None
     AllowOverride None
     Order allow,deny
     Allow from all
     AuthName "nagios Access"
     AuthUserFile /usr/local/nagios/etc/htpasswd
     Require valid-user
</Directory>

#启动httpd
systemctl restart httpd

参考： http://blog.51cto.com/13323775/2085624

9.修改nagios配置

htpasswd -c /usr/local/nagios/etc/htpasswd admin