nginx环境下搭建nagios 3.5.0，及配置pnp4nagios画图

本文基于《LNMP最新源码安装脚本》,Nagios依赖PHP环境和perl环境，由于Nginx不支持Perl的CGI，需先来搭建Perl环境，Nagios原理介绍略。
一、下载最新稳定源码包和Perl脚本
wget http://www.cpan.org/modules/by-module/FCGI/FCGI-0.74.tar.gz
wget http://www.cpan.org/authors/id/B/BO/BOBTFISH/FCGI-ProcManager-0.24.tar.gz
wget http://blog.haohtml.com/wp-content/uploads/2011/08/perl-fcgi.zip
wget http://jaist.dl.sourceforge.net/project/nagios/nagios-3.x/nagios-3.5.0/nagios-3.5.0.tar.gz
wget http://nchc.dl.sourceforge.net/project/nagiosplug/nagiosplug/1.4.16/nagios-plugins-1.4.16.tar.gz
wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBARR/IO-1.25.tar.gz
wget http://search.cpan.org/CPAN/authors/id/I/IN/INGY/IO-All-0.41.tar.gz
wget http://jaist.dl.sourceforge.net/project/pnp4nagios/PNP-0.6/pnp4nagios-0.6.25.tar.gz

二、Nginx对Perl的CGI支持
Nginx支持Perl的CGI方法有好几种，基本原理都是通过Perl的FCGI模块实现，下面的方法就是其中一种：
安装FCGI模块
tar xzf FCGI-0.74.tar.gz
cd FCGI-0.74
perl Makefile.PL
make && make install
cd ../
安装FCGI-ProcManager模块
tar xzf FCGI-ProcManager-0.24.tar.gz
cd FCGI-ProcManager-0.24
perl Makefile.PL
make && make install
cd ../
安装IO模块
tar xvf IO-1.25.tar.gz
cd IO-1.25
perl Makefile.PL
make && make install
cd ..
安装IO-All模块
tar xvf IO-All-0.41.tar.gz
cd IO-All-0.41
perl Makefile.PL
make && make install

启动方法：
下载nginx-fcgi脚本
Wget http://www.nginx.eu/nginx-fcgi/nginx-fcgi.txt
#mv nginx-fcgi.txt /usr/sbin/nginx-fcgi
#chmod +x /usr/sbin/nginx-fcgi
mv nginx-fcgi.txt /usr/local/nginx/sbin/nginx-fcgi (我的nginx安装位置)
chmod +x /usr/local/nginx/sbin/nginx-fcgi
如果不用 sudo 方式运行 nginx-fcgi，请注释掉 nginx-fcgi 脚本中的：

if ( $> == "0" ) {
print "\n\tERROR\tRunning as a root!\n";
print "\tSuggested not to do so !!!\n\n";
exit 1;
}

启动 nginx-fcgi：
/usr/local/nginx/sbin/nginx-fcgi -l /usr/local/nginx/logs/nginx-fcgi.log -pid /usr/local/nginx/logs/nginx-fcgi.pid -S /usr/local/nginx/logs/nginx-fcgi.sock
chown nginx:nginx /usr/local/nginx/logs/nginx-fcgi.sock
注意一定要为 socket 添加 nginx 帐户的权限，否则 cgi 会执行失败，页面会报502错误
运行前使用cpan 安装 FCGI; Getopt::Long; Socket;

设置开机启动（添加到/etc/rc.loacl文件）
/bin/rm -rf /usr/local/nginx/logs/nginx-fcgi.pid
/usr/local/nginx/sbin/nginx-fcgi -l /usr/local/nginx/logs/nginx-fcgi.log -pid /usr/local/nginx/logs/nginx-fcgi.pid -S /usr/local/nginx/logs/nginx-fcgi.sock
chmod 777 /usr/local/nginx/logs/nginx-fcgi.sock　　

新建 nginx-fcgi 脚本指令配置，直接从 fastcgi_params 复制模板：
cp /etc/nginx/fastcgi_params /etc/nginx/nginx_fcgi_params

去除尾部的：
# PHP only, required if PHP was built with –enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;

新建示例 cgi 站点配置：
server {
　　listen 80;
　　server_name test.local;

　　location ~ ^/cgi-bin/.*\.cgi$
　　{
　　　　root /work/www/test;
　　　　fastcgi_index index.cgi;
　　　　fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
　　　　include nginx_fcgi_params;
　　　　fastcgi_read_timeout 5m;
　　　　fastcgi_pass unix:/var/run/nginx-fcgi.sock;
　　}
}

重启 nginx，cgi配置完成。

三、Nagios安装(服务端)
useradd nagios
groupadd nagcmd
usermod -a -G nagcmd nagios
usermod -a -G nagcmd www
tar xzf nagios-3.5.0.tar.gz
cd nagios
yum -y install gd gd-devel
./configure --prefix=/usr/local/nagios --with-command-group=nagcmd --with-htmurl=/ --with-cgiurl=/cgi-bin
make all
make install #用于安装主要的程序、CGI及HTML文件
make install-init #用于生成init启动脚本
make install-config #用于安装示例配置文件
make install-commandmode #用于设置相应的目录权限
chkconfig --add nagios
chkconfig nagios on
cd ../

Nagios主程序只是提供一个运行框架，其具体监控是靠运行在其下的插件完成的，Nagios插件必须安装
tar xzf nagios-plugins-1.4.16.tar.gz
cd nagios-plugins-1.4.16
./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios
make && make install
cd ../

配置Nagios Web界面登陆帐号及密码
借用Apache的htpasswd命令工具
yum install httpd
service httpd stop && chkconfig httpd off #不启用Apache
/usr/local/apache/bin/htpasswd -nb nagiosadmin 123456 > /usr/local/nagios/etc/htpasswd.users
生成加密文件
cat /usr/local/nagios/etc/htpasswd.users
nagiosadmin:wqx7mC26z5vKs

* 修改配置文件

打开 /usr/local/nagios/etc/cgi.cfg，修改 use_authentication 为：
use_authentication=0
即去除用户验证，然后重启 nagios。
（否则会提示：It appears as though you do not have permission to view information for any of the hosts you requested... ，无法显示host和service列表）

打开 /usr/local/nagios/share/config.inc.php，把：
$cfg['cgi_base_url']='/nagios/cgi-bin';
改为（根据自己的实际情况修改，可能不用改）：
$cfg['cgi_base_url']='/cgi-bin';

如果报错：Error: No such CGI app - /usr/local/nagios/sbin/cgi-bin/status.cgi may not exist or is not executable by this process.
则一般都是这里的错误，此处修改的位置根据上面configure编译nagios时定义–with-cgiurl=/cgi-bin修改，本人的这次安装不知道哪里出问题，编译nagios带参数–with-cgiurl=/cgi-bin，此处却必须为 $cfg['cgi_base_url']='/nagios/cgi-bin';不能修改，可能带的参数编译不成功

启动前先检查下配置文件是否正确
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
如果没有报错，可以启动Nagios服务
/usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
【或者/etc/init.d/nagios start】
查看nagios监控状态
/usr/local/nagios/bin/nagiostats

四、配置pnp4nagios使nagios画图
1、首先安装rrdtool等相关依赖环境
yum install -y pango pango-devel freetype freetype-devel libpng libpng-devel gettext gettext-devel libjpeg libjpeg-devel gd gd-devel libxml2 libxml2-devel libiconv libiconv-devel qpixman qpixman-devel glib glib-devel cairo cairo-devel libart* ntp vim-enhanced gcc gcc-c++ gcc-g77 flex bisonautoconf automake bzip2-devel ncurses-devel zlib-devel libjpeg-devellibpng-devel libtiff-devel freetype-devel libXpm-devel gettext-devel pam-devel
yum install -y rrdtool perl-rrdtool rrdtool-devel

2、开始安装pnp4nagios
tar xvf pnp4nagios-0.6.25.tar.gz
cd pnp4nagios-0.6.25
./configure --with-nagios-user=nagios --with-nagios-group=nagcmd
make all
make install
make install-webconf
make install-config
make install-init

3、创建配置文件
cd /usr/local/pnp4nagios/etc
mv misccommands.cfg-sample misccommands.cfg
mv nagios.cfg-sample nagios.cfg
mv npcd.cfg-sample npcd.cfg
mv process_perfdata.cfg-sample process_perfdata.cfg
mv rra.cfg-sample rra.cfg
cd pages
mv web_traffic.cfg-sample web_traffic.cfg
cd ../check_commands
mv check_all_local_disks.cfg-sample check_all_local_disks.cfg
mv check_nrpe.cfg-sample check_nrpe.cfg
mv check_nwstat.cfg-sample check_nwstat.cfg

4、重启npcd服务
/etc/init.d/npcd restart

5、修改 nagios 的配置文件.打开performance_data
vim /usr/local/nagios/etc/nagios.cfg
以下三项有注释则去掉，并按以下修改
process_performance_data=1
host_perfdata_command=process-host-perfdata
service_perfdata_command=process-service-perfdata

6、修改commands.cfg，添加新的"process-host-perfdata"和"process-service-perfdata"，如果原有定义，则注释掉原定义
vim /usr/local/nagios/etc/objects/commands.cfg
# 'process-host-perfdata' command definition
define command{
　　command_name 　　　 process-host-perfdata
　　command_line 　　　　 /usr/local/pnp4nagios/libexec/process_perfdata.pl -d HOSTPERFDATA
}

# 'process-service-perfdata' command definition
define command{
　　command_name 　　　　 process-service-perfdata
　　command_line 　　　　　 /usr/local/pnp4nagios/libexec/process_perfdata.pl
}

7、添加小太阳模版，镶嵌在nagios页面上
vim /usr/local/nagios/etc/objects/templates.cfg
define host {
　　name 　　　　 hosts-pnp
　　action_url 　　/pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=_HOST_
　　register 　　　 0
}

define service {
　　name 　　　　 services-pnp
　　action_url　　 /pnp4nagios/index.php/graph?host=$HOSTNAME$&srv=$SERVICEDESC$
　　register 　　　 0
}

8、修改 hosts.cfg和services.cfg，添加hosts-pnp和services-pnp
vim /usr/local/nagios/etc/objects/hosts.cfg
define host{
　　use 　　　　　　linux-server,hosts-pnp
　　host_name 　　123.206.34.2
　　alias　　　　　123.206.34.2
　　address 　　　 123.206.34.2
}

vim /usr/local/nagios/etc/objects/services.cfg
define service {
　　use 　　　　　　　　　　generic-service,services-pnp
　　host_name 　　　　　　123.206.34.2
　　service_description 　　 Disk / Partition
　　check_command 　　　 check_nrpe!check_disk!15%!10%!/
}

9、重启nagios服务
/etc/init.d/nagios restart

四、nginx配置文件
vim /usr/local/nginx/conf/vhost/nginx.conf
server
{
　　listen 80;
　　server_name nagios.test.com;
　　root /usr/local/nagios/share;
　　index index.php index.html index.htm;
　　charset utf-8;
　　expires 2h;

　　location ~ .*\\.(php|php5)?$
　　{
　　　　fastcgi_pass 127.0.0.1:9000;
　　　　fastcgi_index index.php;
　　　　include fcgi.conf;
　　　　auth_basic "Nagios Login";
　　　　auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
　　}

　　location ~ .*\\.cgi$ {
　　　　root /usr/local/nagios/sbin;
　　　　rewrite ^/nagios/cgi-bin/(.*)\\.cgi /$1.cgi break;
　　　　#rewrite ^/nagios/(.*)\\.cgi /$1.cgi break;
　　　　fastcgi_pass unix:/usr/local/nginx/logs/nginx-fcgi.sock;
　　　　fastcgi_index index.cgi;
　　　　#fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin/$fastcgi_script_name;
　　　　fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
　　　　fastcgi_param HTTP_ACCEPT_LANGUAGE zh-cn;
　　　　include fcgi.conf;
　　　　auth_basic "Nagios Login";
　　　　auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
　　}

　　location /nagios/ {
　　　　alias /usr/local/nagios/share/;
　　}

　　##如果没有配置pnp4nagios画图，以下两段location则不用配置
　　##在nagios监控页面点击小太阳图标时如果显示404找不到rrd图片文件，则需要注意以下配置是否正确无误
　　location /pnp4nagios {
　　　　alias /usr/local/pnp4nagios/share;
　　　　index index.php;
　　　　try_files $uri $uri/ @pnp4nagios;
　　}

　　location @pnp4nagios {
　　　　fastcgi_pass 127.0.0.1:9000;
　　　　fastcgi_index index.php;
　　　　include fastcgi_params;
　　　　fastcgi_split_path_info ^(.+\.php)(.*)$;
　　　　fastcgi_param PATH_INFO $fastcgi_path_info;
　　　　fastcgi_param SCRIPT_FILENAME /usr/local/pnp4nagios/share/index.php;
　　}

}

vim /usr/local/nginx/conf/fcgi.conf

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;

fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;

fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
#fastcgi_param REDIRECT_STATUS 200;

或者
（nginx + php-fpm页面显示空白的问题http://blog.sina.com.cn/s/blog_67d781d20101nhy0.html）

fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;

fastcgi_param REMOTE_USER $remote_user;

fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;

fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param REDIRECT_STATUS 200;