nagios监控的安装

本文中，物理机IP 192.168.1.105
虚拟linux主机ip 192.168.1.10
安装apache和php
Apache 和Php 不是安装nagios 所必须的，但是nagios提供了web监控界面，通过web监控界面可以清晰的看到被监控主机、资源的运行状态，
因此，安装一个web服务是很必要的。 
需要注意的是，nagios在nagios3.1.x版本以后，配置web监控界面时需要php的支持。
这里我们下载的nagios版本为nagios-3.4.3，因此在编译安装完成apache后，还需要编译php模块，
这里选取的php版本为php5.4.10。

[root@rhel6 ~]# tar xjf httpd-2.2.32.tar.bz2
[root@rhel6 ~]# cd httpd-2.2.32
[root@rhel6 httpd-2.2.32]# ./configure --prefix=/usr/local/apache2
checking for chosen layout... Apache
checking for working mkdir -p... yes
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu

Configuring Apache Portable Runtime library ...

checking for APR... reconfig
configuring package in srclib/apr now
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking target system type... x86_64-unknown-linux-gnu
Configuring APR library
Platform: x86_64-unknown-linux-gnu
checking for working mkdir -p... yes
APR Version: 1.5.2
checking for chosen layout... apr
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/root/httpd-2.2.32/srclib/apr':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details
configure failed for srclib/apr

#上面安装记录我们发现，是缺少依赖组件，这里我们检查nagios所需要的支持套件的安装情况，没有安装的全部进行yum安装
[root@rhel6 httpd-2.2.32]# rpm -q gcc glibc glibc-common gd gd-devel xinetd openssl-devel
[root@rhel6 httpd-2.2.32]# rpm -q gcc glibc glibc-common gd gd-devel xinetd openssl-devel
package gcc is not installed
glibc-2.12-1.132.el6.x86_64
glibc-common-2.12-1.132.el6.x86_64
package gd is not installed
package gd-devel is not installed
package xinetd is not installed
package openssl-devel is not installed
[root@rhel6 httpd-2.2.32]# yum install -y gcc gd gd-devel xinetd openssl-devel

#编译安装
[root@rhel6 httpd-2.2.32]# ./configure --prefix=/usr/local/apache2
[root@rhel6 httpd-2.2.32]# make && make install

测试配置文件和启动(service httpd start)
[root@rhel6 apache2]# /usr/local/apache2/bin/apachectl -t
[root@rhel6 apache2]# /usr/local/apache2/bin/apachectl  

##使用其他主机访问一定要注意关闭防火墙！或者配置好防火墙策略，要不是访问不了的！
[root@rhel6 apache2]# service iptables status

[root@rhel6 apache2]# service iptables stop

到此apache安装完成！

z设置开机自启动
chkconfig --add httpd
chkconfig httpd --level 345 on

安装Php

# wget http://cn2.php.net/distributions/php-5.5.10.tar.gz

# tar zxvf php-5.5.10.tar.gz

# cd php-5.5.10

# ./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache2/bin/apxs

有报错如下

[root@rhel6 php-5.5.10]# yum install -y libxml2-devel libxml2

# ./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache2/bin/apxs

# make && make install

配置apache 
找到apache 的配置文件/usr/local/apache2/conf/httpd.conf 
找到：

User daemon
Group daemon 

修改为

User nagios
Group nagios 

然后找到

<IfModule dir_module>
　　DirectoryIndex index.html
</IfModule> 

修改为

<IfModule dir_module>
　　DirectoryIndex index.html index.php
</IfModule> 

接着增加如下内容：

AddType application/x-httpd-php .php 

为了安全起见，一般情况下要让nagios 的web 监控页面必须经过授权才能访问，这需要增加验证配置，即在httpd.conf 文件最后添加如下信息：

 

#setting for nagios
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.users
     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.users
     Require valid-user
</Directory> 

2.nagios安装配置

#安装nagios前准备工作
[root@rhel6 ~]# groupadd nagios
[root@rhel6 ~]# useradd nagios -g nagios -s /sbin/nologin
[root@rhel6 ~]# mkdir /usr/local/nagios
[root@rhel6 ~]# chown -R nagios:nagios /usr/local/nagios

[root@rhel6 ~]# tar xzvf nagios-3.2.0.tar.gz
[root@rhel6 nagios-3.2.0]# ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios

*** Configuration summary for nagios 3.2.0 08-12-2009 ***:

 General Options:
 -------------------------
        Nagios executable:  nagios
        Nagios user/group:  nagios,nagios
       Command user/group:  nagios,nagios
            Embedded Perl:  no
             Event Broker:  yes
        Install ${prefix}:  /usr/local/nagios
                Lock file:  ${prefix}/var/nagios.lock
   Check result directory:  ${prefix}/var/spool/checkresults
           Init directory:  /etc/rc.d/init.d
  Apache conf.d directory:  /etc/httpd/conf.d
             Mail program:  /bin/mail
                  Host OS:  linux-gnu

 Web Interface Options:
 ------------------------
                 HTML URL:  http://localhost/nagios/
                  CGI URL:  http://localhost/nagios/cgi-bin/
 Traceroute (used by WAP):  /bin/traceroute

Review the options above for accuracy.  If they look okay,
type 'make all' to compile the main program and CGIs.

[root@rhel6 nagios-3.2.0]# make all
[root@rhel6 nagios-3.2.0]# make install
[root@rhel6 nagios-3.2.0]# make install-init  生成init启动脚本

 [root@rhel6 nagios-3.2.0]# make install-config 生成一些模板配置文件

[root@rhel6 nagios-3.2.0]# make install-commandmode 设置相应的权限

 [root@rhel6 nagios-3.2.0]# make install-webconf

为Nagios设置Web验证的密码账号nagiosadmin  

[root@rhel6 nagios-3.2.0]/usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

设置nagios开机自启动

[root@rhel6 nagios-3.2.0]# chkconfig --add nagios
[root@rhel6 nagios-3.2.0]# chkconfig nagios --level 345 on

3.nagios-plugin安装

[root@rhel6 ~]# tar xzvf nagios-plugins-1.4.14.tar.gz
[root@rhel6 ~]# cd nagios-plugins-1.4.14
[root@rhel6 nagios-plugins-1.4.14]# ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
[root@rhel6 nagios-plugins-1.4.14]# make && make install

4.重新启动Apache和nagios

service httpd restart

service nagios restart

检查配置文件

[root@rhel6 ~]# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg

Nagios Core 3.2.0
Copyright (c) 2009 Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 08-12-2009
License: GPL

Website: http://www.nagios.org
Reading configuration data...
Read main config file okay...
Processing object config file '/usr/local/nagios/etc/objects/commands.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/contacts.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/timeperiods.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/templates.cfg'...
Processing object config file '/usr/local/nagios/etc/objects/localhost.cfg'...
Read object config files okay...

Running pre-flight check on configuration data...

Checking services...
Checked 8 services.
Checking hosts...
Checked 1 hosts.
Checking host groups...
Checked 1 host groups.
Checking service groups...
Checked 0 service groups.
Checking contacts...
Checked 1 contacts.
Checking contact groups...
Checked 1 contact groups.
Checking service escalations...
Checked 0 service escalations.
Checking service dependencies...
Checked 0 service dependencies.
Checking host escalations...
Checked 0 host escalations.
Checking host dependencies...
Checked 0 host dependencies.
Checking commands...
Checked 24 commands.
Checking time periods...
Checked 5 time periods.
Checking for circular paths between hosts...
Checking for circular host and service dependencies...
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...

Total Warnings: 0
Total Errors: 0

Things look okay - No serious problems were detected during the pre-flight check

我在做这个的时候遇到这样问题，web界面登陆用户名和密码确认都对，就是一直登陆不进去，后来资料研究发现是上图橙色文字/usr/local/nagios/etc/htpasswd.users路径错写成/usr/local/nagios/etc/htpasswd导致，具体为啥会这样我也说不清，希望大神看到解毒，修改后可以登陆。

但是此时又出现了另外一个问题 _{You don't have permission to access /nagios/ on this server}  

出现这个问题原因很多种

1.php是否正确安装，可用php -v看下，如未安装可用使用yum一键安装 yum -y install php

2.httpd配置文件是否正确

下图中的配置如果是deny from all是万不能行的，我就是深受其害，改为allow from all，

http服务重启 service httpd restart

到此一切就能正确访问啦，欢迎大家伙沟通交流。