一、系统运行环境：
服务器系统版本：Centos 5.3 x64
nginx版本：nginx-0.8.54
nagios版本：nagios-3.2.3
二 、关闭不需要的服务：
chkconfig –level 2345 cups off
chkconfig –level 2345 ip6tables off
chkconfig –level 2345 iptables off
chkconfig –level 2345 netfs off
chkconfig –level 2345 nfslock off
chkconfig –level 2345 portmap off
chkconfig –level 2345 rhnsd off
chkconfig –level 2345 rpcsvcgssd off
chkconfig –level 2345 rpcidmapd off
chkconfig –level 2345 smartd off
chkconfig –level 2345 xfs off
chkconfig –level 2345 bluetooth off
chkconfig –level 2345 hidd off
chkconfig –level 2345 pand off
chkconfig –level 2345 dund off
chkconfig –level 2345 capi off
chkconfig –level 2345 firstboot off
chkconfig –level 2345 kudzu off
chkconfig –level 2345 mcstrans off
chkconfig –level 2345 pcscd off
chkconfig –level 2345 restorecond off
chkconfig –level 2345 rpcgssd off
三、下载所需包:
所有安装所需的源码包：本站点集成下载：
http://www.jiankli.com/download/nginx-0.8.54.tar.gz
http://www.jiankli.com/download/pcre-8.01.tar.gz
http://www.jiankli.com/download/FCGI-0.67.tar.gz
http://www.jiankli.com/download/FCGI-ProcManager-0.18.tar.gz
http://www.jiankli.com/download/nagios-3.2.3.tar.gz
http://www.jiankli.com/download/nagios-cn-3.2.3.tar.bz2
http://www.jiankli.com/download/nagios-plugins-1.4.13.tar.gz
http://www.jiankli.com/download/nrpe-2.8.1.tar.gz
http://www.jiankli.com/download/php-5.2.17.tar.gz
四、安装nginx：
安装nginx之前需要安装pcre包和zlib以支持重写,正则以及网页压缩等等
（1）首先安装pcre：
cd /usr/src
tar xzf pcre-8.01.tar.gz
cd pcre-8.01
./configure –prefix=/usr/local/pcre
make &&make install
（2）、然后再安装nginx ：
useradd www
cd /usr/src
tar xzf nginx-0.8.54.tar.gz
cd nginx-0.8.54
./configure –prefix=/usr/local/nginx-0.8 –with-http_stub_status_module –with-openssl=/usr/ –with-pcre=/usr/src/pcre-8.01 –user=www –group=www
make &&make install
【nginx注意* –with-pcre=/usr/src/pcre-8.01指向的是源码包解压的路径，而不是安装的路径，否则会报
make[1]: *** [/usr/local/pcre/Makefile] Error 127 错误】
nginx安装完毕后。
五、正式安装nagios：（nagios中文版同样安装配置）
创建nagios用户和组，并把www加入nagios管理组：
useradd nagios
groupadd nagcmd
usermod -g nagcmd nagios
usermod -g nagcmd www
cd /usr/scr
tar xzf nagios-3.2.3.tar.gz
cd nagios-3.2.3
./configure –with-command-group=nagcmd –prefix=/usr/local/nagios
make all
make install
make install-init
make install-config
make install-commandmode
nagios安装完毕：
验证程序是否被正确安装。切换目录到安装路径（这里是/usr/local/nagios）,看是否存在 etc、bin、 sbin、 share、 var这五个目录，如果存在则可以表明程序被正确的安装到系统了。
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bin
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Nagios执行程序所在目录，这个目录只有一个文件nagios
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|
etc
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Nagios配置文件位置，初始安装完后，只有几个*.cfg-sample文件
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sbin
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Nagios Cgi文件所在目录，也就是执行外部命令所需文件所在的目录
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|
Share
|
Nagios网页文件所在的目录
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|
Var
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Nagios日志文件、spid 等文件所在的目录
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接下来编译并安装nagios插件 nagios-plugins
cd /usr/src
tar zxvf nagios-plugins-1.4.13.tar.gz
cd nagios-plugins-1.4.13
./configure –perfix=/usr/local/nagios –with-nagios-user=nagios –with-nagios-group=nagios
make && make install
插件安装完毕！
ls /usr/local/nagios/libexec
会显示安装的插件文件,即所有的插件都安装在libexec这个目录下。
六、安装perl fcgi模块：【首先得安装php并编译fastcGI模块】
（1）安装php
cd /usr/src
tar xzf php-5.2.17.tar.gz
cd php-5.2.17
./configure –prefix=/usr/local/php –with-config-file-path=/usr/local/php/etc –with-mysql=/usr/local/mysql –with-mysqli=/usr/local/mysql/bin/mysql_config –with-iconv-dir=/usr/local –with-freetype-dir –with-jpeg-dir –with-png-dir –with-zlib –with-libxml-dir=/usr –enable-xml –disable-rpath –enable-discard-path –enable-safe-mode –enable-bcmath –enable-shmop –enable-sysvsem–enable-inline-optimization –with-curl –with-curlwrappers –enable-mbregex –enable-fpm –enable-sockets
make &&make install
安装完毕！【注意这个参数在此可以不加–enable-fastcgi；其他之前版本需要加上，以上安装根据自己的选择添加，如果报错，根据具体报错找原因】
（2）、安装FCGI
cd /usr/src
tar -zxvf FCGI-0.67.tar.gz
cd FCGI-0.67
perl Makefile.PL
make
make install
(3)、安装FCGI-ProcManager:
cd /usr/src
tar -xzxf FCGI-ProcManager-0.18.tar.gz
cd FCGI-ProcManager-0.18
perl Makefile.PL
make
make install
安装完毕即可。
mkdir -p /usr/local/nagios/share/nagios
ln -s /usr/local/nagios/share/images /usr/local/nagios/share/nagios/images
ln -s /usr/local/nagios/share/stylesheets /usr/local/nagios/share/nagios/stylesheets ///避免无法显示图片。
接下来配置cgi脚本、nginx配置文件：
cd/usr/local/nagios/bin/perl-cgi.pl
#!/usr/bin/perl
use FCGI;
#perl -MCPAN -e ‘install FCGI’
use Socket;
#this keeps the program alive or something after exec’ing perl scripts
END()
{
}
BEGIN()
{
}
*CORE::GLOBAL::exit
=
sub
{
die
“fakeexitnrc=”.shift().”n”;
};
eval
q{exit};
if
($@)
{
exit
unless
$@
=~
/^fakeexit/;
}
;
&main;
sub main {
#$socket = FCGI::OpenSocket( “:3461″, 10 ); #use IP sockets
$socket
= FCGI::OpenSocket(
“/var/run/nagios.sock”,
10
);
#use UNIX sockets – user running this script must have w access to the ‘nginx’ folder!!
$request
= FCGI::Request(
*STDIN,
*STDOUT,
*STDERR,
%ENV,
$socket
);
if
($request)
{request_loop()};
FCGI::CloseSocket(
$socket
);
}
sub request_loop {
while(
$request->Accept()
>=
0
)
{
#processing any STDIN input from WebServer (for CGI-GET actions)
$env
=
$request->GetEnvironment();
$stdin_passthrough
=”;
$req_len
=
0
+
$ENV{CONTENT_LENGTH};
if
($ENV{REQUEST_METHOD}
eq
‘GET’){
$stdin_passthrough
.=
$ENV{‘QUERY_STRING’};
}
#running the cgi app
if
(
(-x $ENV{SCRIPT_FILENAME})
&&
#can I execute this?
(-s
$ENV{SCRIPT_FILENAME})
&&
#Is this file empty?
(-r $ENV{SCRIPT_FILENAME})
#can I read this file?
){
#http://perldoc.perl.org/perlipc.html#Safe-Pipe-Opens
open
$cgi_app,
‘-|’,
$ENV{SCRIPT_FILENAME},
$stdin_passthrough
or
print(“Content-type: text/plainrnrn”);
print
“Error: CGI app returned no output – Executing $ENV{SCRIPT_FILENAME} failed !n”;
if
($cgi_app)
{print
<$cgi_app>;
close
$cgi_app;}
}
else
{
print(“Content-type: text/plainrnrn”);
print
“Error: No such CGI app – $req_len – $ENV{CONTENT_LENGTH} – $ENV{REQUEST_METHOD} – $ENV{SCRIPT_FILENAME} may not exist or is not executable by this process.n”;
}
}
}
保存并退出，并给予执行权限
chmod +x /usr/local/nagios/bin/perl-cgi.pl
以下是我的nginx.conf文件server内容：
server
{
listen 80;
server_name 192.168.2.79;
root /usr/local/nagios/share;
index index.php;
auth_basic “You Name”;
auth_basic_user_file /usr/local/nagios/etc/htpasswd;
log_format nagios ‘$remote_addr – $remote_user [$time_local] “$request” ‘
‘$status $body_bytes_sent “$http_referer” ‘
‘”$http_user_agent” $http_x_forwarded_for’;
access_log /usr/local/nginx/nagios.log nagios;
location ~ .*.(php|php5)?$
{
#fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fcgi.conf;
}
location ~ .cgi$ {
root /usr/local/nagios/sbin;
rewrite ^/nagios/cgi-bin/(.*).cgi /$1.cgi break;
fastcgi_index index.cgi;
fastcgi_pass unix:/var/run/nagios.sock;
fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param REMOTE_USER $remote_user;
#默认没有红色这一句，如果没有，后面nagios页面会报错，具体错误后面给出。
#fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_NAME $server_name;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param HTTP_ACCEPT_ENCODING gzip,deflate;
fastcgi_param HTTP_ACCEPT_LANGUAGE zh-cn;
}
fcgi.conf文件内容如下：
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;
以上可以把nginx中fastcGI部分整合到fcgi.conf中。
七、创建一个nagiosadmin用户：
用于Nagios的WEB接口登录。
记下你所设置的登录口令，一会儿你会用到它
这里要借助于apche的htpasswd，在有apache机器上执行下列命令
/usr/local/apache2/bin/htpasswd -c /usr/local/nagios/etc/htpasswd nagiosadmin
输入两次一样的密码即可。
启 动nagios ；chkconfig –add nagios 添加到service 中，chkconfig nagios –level 35 on 设置成开机启动。【把selinux、iptables关闭，或者更改iptables策略需要访问nagios】
八、nagios配置
（一） 修改配置文件
Nagios的主配置文件是nagios.cfg，我们就从这个文件开始修改。用vi编辑nagios.cfg，注释行 #cfg_file=/usr/local/nagios/etc/localhost.cfg[2],然后把下面几行的注释去掉：
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cfg_file=/usr/local/nagios/etc/contactgroups.cfg //联系组配置文件路径
cfg_file=/usr/local/nagios/etc/contacts.cfg //联系人配置文件路径
cfg_file=/usr/local/nagios/etc/hostgroups.cfg //主机组配置文件路径
cfg_file=/usr/local/nagios/etc/hosts.cfg //主机配置文件路径
cfg_file=/usr/local/nagios/etc/services.cfg //服务配置文件路径
cfg_file=/usr/local/nagios/etc/timeperiods.cfg //监视时段配置文件路径
|
第二个要修改的配置文件是cgi.cfg,它的作用是控制相关cgi脚本。先确保use_authentication=1。曾看过不少的文章，都是建议 把use_authentication的值设置成”0”来取消验证，这是一个十分糟糕的想法。接下来修改 default_user_name=vincent ,再后面的修改在下表列出：
| authorized_for_system_information=nagiosadmin,vincent authorized_for_configuration_information=nagiosadmin,vincent authorized_for_system_commands=vincent //多个用户之间用逗号隔开 authorized_for_all_services=nagiosadmin,vincent authorized_for_all_hosts=nagiosadmin,vincent authorized_for_all_service_commands=nagiosadmin,vincent authorized_for_all_host_commands=nagiosadmin,vincent
|
| #host-notify-by-sms //发送短信报警 define command { command_name host-notify-by-sms command_line /usr/local/bin/sms_send “Host $HOSTSTATE$ alert for $HOSTNAME$! on ‘$DATETIME$’ ” $CONTACTPAGER$ } #service notify by sms //发送短信报警 define command { command_name service-notify-by-sms command_line /usr/local/bin/sms_send “‘$HOSTADDRESS$’ $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$” $CONTACTPAGER$
}
|
|
define timeperiod{
timeperiod_name 24×7
alias 24 Hours A Day, 7 Days A Week
sunday 00:00-24:00
monday 00:00-24:00
tuesday 00:00-24:00
wednesday 00:00-24:00
thursday 00:00-24:00
friday 00:00-24:00
saturday 00:00-24:00
}
|
|
define contact {
contact_name sa //不要有空格
alias system administrator
service_notification_period 24×7
host_notification_period 24×7
service_notification_options w,u,c,r
host_notification_options d,u,r
service_notification_commands service-notify-by-sms,service-
notify-by-email //这个命令读配置文件miscommands.cfg
host_notification_commands host-notify-by-email,host-noti
fy-by-sms //这个命令读配置文件miscommands.cfg
email [email protected]
pager 13333333333 //手机号，收报警短信
} //不要把这个符号写掉了
define contact {
contact_name vincent
alias system administrator
service_notification_period 24×7
host_notification_period 24×7
service_notification_options w,u,c,r
host_notification_options d,u,r
service_notification_commands service-notify-by-sms,service-
notify-by-email
host_notification_commands host-notify-by-email,host-noti
fy-by-sms
email [email protected]
pager 13312345678
}
|
|
define contactgroup {
contactgroup_name sagroup //不要用空格
alias system administrator group
members sa,vincent //本例有2个成员
}
|
|
#define monitor host
############################################
# Wangjing IDC servers #
############################################
define host {
host_name nagios-server
alias nagios server
address 61.x..x.49
contact_groups sagroup //多个联系组用逗号分隔，数据来源于contactgroups.cfg
check_command check-host-alive
max_check_attempts 5
notification_interval 10 //值可调，大小什么值合适需自己测定
notification_period 24×7
notification_options d,u,r
}
define host {
host_name 24-25
alias server 24-25
address 202.X.24.25
contact_groups sagroup
check_command check-host-alive //down机就发报警通知
max_check_attempts 5
notification_interval 10
notification_period 24×7
notification_options d,u,r
}
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|
#service definition
###########################################
# Wangjing IDC servers service for host-live #
###########################################
define service {
host_name nagios-server //来源：hosts.cfg
service_description check-host-alive
check_period 24×7
max_check_attempts 4
normal_check_interval 3
retry_check_interval 2
contact_groups sagroup //来源：contactgroups.cfg
notification_interval 10
notification_period 24×7
notification_options w,u,c,r
check_command check-host-alive //检查主机是否存活
}
define service {
host_name 74-210
service_description check_tcp 80
check_period 24×7
max_check_attempts 4
normal_check_interval 3
retry_check_interval 2
contact_groups sagroup
notification_interval 10
notification_period 24×7
notification_options w,u,c,r
check_command check_tcp!80 //检查tcp 80端口服务是否正常
}
|
|
define hostgroup {
hostgroup_name sa-servers
alias sa servers
members nagios-server,24-25,24-26 //用逗号间隔多个主机
}
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启动nginx，确定有fastcGI 9000端口。 后台启动screen ./perl-cgi.pl >/dev/null ；ctrl +a +d 退出screen。
然后chmod 777 /var/run/nagios.sock ；并且重启service nagios restart
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Total Warnings: 0
Total Errors: 0
Things look okay – No serious problems were detected during the pre-flight check
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九、安装完毕，然后访问：
直接访问 http://192.168.2.79 会弹出登录框 ，输入用户名nagiosadmin 和密码，会看到nagios默认监控localhost！
页面如下：而且点击详细服务关闭报警，也不报错:
这样的话，nginx+nagios 环境搭建完毕！剩下的就是具体监控客户端的配置啦！文章后续给出！
本文环境已经测试通过，搭建的时候，也遇到了好多例如403、502、504等等系列问题，一点一滴的解决。一件事只有你真正做过，你才会感觉到学到很多东西。如下的报错：
（1）、It seems that you have chosen to not use the authentication functionality of the CGIs.
I don’t want to be personally responsible for what may happen as a result of allowing
unauthorized users to issue commands to Nagios,so you’ll have to disable this safeguard if you
are really stubborn and want to invite trouble.
（2）、It appears as though you do not have permission to view information for any of the hosts you requested…
If you believe this is an error, check the HTTP server authentication requirements for accessing this CGI
and check the authorization options in your CGI configuration file
可参照修改：http://hi.baidu.com/shengit/blog/item/b21b770965c6e8de62d986c0.html
本文参考文章链接：
http://bbs.linuxtone.org/thread-4441-1-1.html
http://bbs.linuxtone.org/thread-7404-1-1.html
http://www.comeonsa.com/
http://sery.blog.51cto.com/10037/20520