前言：
选择Nginx的优点：
Nginx 可以在大多数 Unix like OS 上编译运行，并有 Windows 移植版。 Nginx 的1.4.0稳定版已经于2013年4月24日发布，一般情况下，对于新建站点，建议使用最新稳定版作为生产版本，已有站点的升级急迫性不高。Nginx 的源代码使用 2-clause BSD-like license。
Nginx 是一个很强大的高性能Web和反向代理服务器，它具有很多非常优越的特性：
在高连接并发的情况下，Nginx是Apache服务器不错的替代品：Nginx在美国是做虚拟主机生意的老板们经常选择的软件平台之一。能够支持高达 50,000 个并发连接数的响应，感谢Nginx为我们选择了 epoll and kqueue作为开发模型。

1.1 执行安装

tar -xvf nginx-1.4.2.tar.gz
cd nginx-1.4.2
./configure --prefix=/usr/nginx --with-http_stub_status_module --with-debug --with-http_realip_module --with-http_ssl_module


[root@localhost nginx-1.4.2]# make install
......
test -d \'/usr/nginx/logs\' || mkdir -p \'/usr/nginx/logs\'
test -d \'/usr/nginx/logs\' || mkdir -p \'/usr/nginx/logs\'
test -d \'/usr/nginx/html\' || cp -R html \'/usr/nginx\'
test -d \'/usr/nginx/logs\' || mkdir -p \'/usr/nginx/logs\'

1.2 查看进程数
进程数是与top出来的cpu数量是一样的。在/usr/local/nginx/conf/nginx.conf配置文件里面的worker_processes参数。
worker_processes指明了nginx要开启的进程数，据官方说法，一般开一个就够了，多开几个，可以减少机器io带来的影响。据实践表明，nginx的这个参数在一般情况下开4个或8个就可以了，再往上开的话优化不太大。据另一种说法是，nginx开启太多的进程，会影响主进程调度，所以占用的cpu会增高。

[root@lb-net-2 ~]# ps -eaf|grep nginx
root 2221 1382 0 18:06 pts/0 00:00:00 grep nginx
root 16260 1 0 Jun18 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 16261 16260 0 Jun18 ? 00:01:26 nginx: worker process 
nobody 16262 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16263 16260 0 Jun18 ? 00:01:25 nginx: worker process 
nobody 16264 16260 0 Jun18 ? 00:01:33 nginx: worker process 
nobody 16265 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16266 16260 0 Jun18 ? 00:01:24 nginx: worker process 
nobody 16267 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16268 16260 0 Jun18 ? 00:01:23 nginx: worker process 
nobody 16269 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16270 16260 0 Jun18 ? 00:01:26 nginx: worker process 
nobody 16271 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16272 16260 0 Jun18 ? 00:01:25 nginx: worker process 
nobody 16273 16260 0 Jun18 ? 00:01:26 nginx: worker process 
nobody 16274 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16275 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16276 16260 0 Jun18 ? 00:01:33 nginx: worker process 
nobody 16277 16260 0 Jun18 ? 00:01:24 nginx: worker process 
nobody 16278 16260 0 Jun18 ? 00:01:24 nginx: worker process 
nobody 16279 16260 0 Jun18 ? 00:01:30 nginx: worker process 
nobody 16280 16260 0 Jun18 ? 00:01:24 nginx: worker process 
nobody 16281 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16282 16260 0 Jun18 ? 00:01:32 nginx: worker process 
nobody 16283 16260 0 Jun18 ? 00:01:25 nginx: worker process 
nobody 16284 16260 0 Jun18 ? 00:01:26 nginx: worker process

2 配置文件
2.1 Nginx反向代理实践
省过

2.2 Nginx Rewrite重新定向
使用nginx做重新定向。
nginx参考网址：`js
http://blog.sina.com.cn/s/blog_97688f8e0100zws5.html
语法规则： location [=|~|~*|^~] /uri/ { … }
= 开头表示精确匹配
^~ 开头表示uri以某个常规字符串开头，理解为匹配 url路径即可。nginx不对url做编码，因此请求为/static/20%/aa，可以被规则^~ /static/ /aa匹配到（注意是空格）。
~ 开头表示区分大小写的正则匹配
~* 开头表示不区分大小写的正则匹配
!~和!~*分别为区分大小写不匹配及不区分大小写不匹配 的正则
/ 通用匹配，任何请求都会匹配到。

多个location配置的情况下匹配顺序为（参考资料而来，还未实际验证，试试就知道了，不必拘泥，仅供参考）:
首先匹配 =，其次匹配^~, 其次是按文件中顺序的正则匹配，最后是交给 / 通用匹配。当有匹配成功时候，停止匹配，按当前匹配规则处理请求。
例子，有如下匹配规则：

location = / {
#规则A
}
location = /login {
#规则B
}
location ^~ /static/ {
#规则C
}
location ~ .(gif|jpg|png|js|css)$ {
#规则D
}
location ~* .png$ {
#规则E
}
location !~ .xhtml$ {
#规则F
}
location !~* .xhtml$ {
#规则G
}
location / {
#规则H
}

那么产生的效果如下：
访问根目录/， 比如http://localhost/ 将匹配规则A
访问 http://localhost/login 将匹配规则B，http://localhost/register 则匹配规则H
访问 http://localhost/static/a.html 将匹配规则C
访问 http://localhost/a.gif, http://localhost/b.jpg 将匹配规则D和规则E，但是规则D顺序优先，规则E不起作用，而 http://localhost/static/c.png 则优先匹配到规则C
访问 http://localhost/a.PNG 则匹配规则E，而不会匹配规则D，因为规则E不区分大小写。
访问 http://localhost/a.xhtml 不会匹配规则F和规则G，http://localhost/a.XHTML不会匹配规则G，因为不区分大小写。规则F，规则G属于排除法，符合匹配规则但是不会匹配到，所以想想看实际应用中哪里会用到。
访问 http://localhost/category/id/1111 则最终匹配到规则H，因为以上规则都不匹配，这个时候应该是nginx转发请求给后端应用服务器，比如FastCGI（php），tomcat（jsp），nginx作为方向代理服务器存在。

所以实际使用中，个人觉得至少有三个匹配规则定义，如下：

直接匹配网站根，通过域名访问网站首页比较频繁，使用这个会加速处理，官网如是说。

这里是直接转发给后端应用服务器了，也可以是一个静态首页

第一个必选规则

location = / {

proxy_pass http://tomcat:8080/index

}

第二个必选规则是处理静态文件请求，这是nginx作为http服务器的强项

有两种配置模式，目录匹配或后缀匹配,任选其一或搭配使用

location ^~ /static/ {

root /webroot/static/;

}
location ~* .(gif|jpg|jpeg|png|css|js|ico)$ {

root /webroot/res/;

}

第三个规则就是通用规则，用来转发动态请求到后端应用服务器

非静态文件请求就默认是动态请求，自己根据实际把握

毕竟目前的一些框架的流行，带.php,.jsp后缀的情况很少了

location / {

proxy_pass http://tomcat:8080/

}

2.3 ReWrite语法

last – 基本上都用这个Flag。
break – 中止Rewirte，不在继续匹配
redirect – 返回临时重定向的HTTP状态302
permanent – 返回永久重定向的HTTP状态301

1、下面是可以用来判断的表达式：

-f和!-f用来判断是否存在文件
-d和!-d用来判断是否存在目录
-e和!-e用来判断是否存在文件或目录
-x和!-x用来判断文件是否可执行

2、下面是可以用作判断的全局变量

例：http://localhost:88/test1/test2/test.php
$host：localhost
$server_port：88
$request_uri：http://localhost:88/test1/test2/test.php
$document_uri：/test1/test2/test.php
$document_root：D:nginx/html
$request_filename：D:nginx/html/test1/test2/test.php

2.4 Redirect语法

server {
listen 80;
server_name start.igrow.cn;
index index.html index.php;
root html;
if ($http_host !~ “^star.igrow.cn$" {
rewrite ^(.*) http://star.igrow.cn$1 redirect;
}
}

2.5 防盗链

location ~* .(gif|jpg|swf)$ {
valid_referers none blocked start.igrow.cn sta.igrow.cn;
if ($invalid_referer) {
rewrite ^/ http://$host/logo.png;
}
}

2.6 根据文件类型设置过期时间

location ~* .(js|css|jpg|jpeg|gif|png|swf)$ {
if (-f $request_filename) {
expires 1h;
break;
}
}

2.7 禁止访问某个目录

location ~* .(txt|doc)${
root /data/www/wwwroot/linuxtone/test;
deny all;
}

一些可用的全局变量:

$args
$content_length
$content_type
$document_root
$document_uri
$host
$http_user_agent
$http_cookie
$limit_rate
$request_body_file
$request_method
$remote_addr
$remote_port
$remote_user
$request_filename
$request_uri
$query_string
$scheme
$server_protocol
$server_addr
$server_name
$server_port
$uri

2.8 Nginx静态文件(css,js,jpg等等web静态资源)

vim /usr/local/nginx/conf/nginx.conf
server {

    listen       80;
    server_name  localhost;
    open_file_cache max=10000 inactive=60s;

    location /group1/M00 {
        root   /data/fastdfs/data;
        ngx_fastdfs_module;
    }

    location /css {
        root   plocc_static;
        include gzip.conf;
    }

    location /common {
        root   plocc_static;
        include gzip.conf;
    }

2.9 nginx 转发工程的日志文件
去nginx.conf配置文件里面去看访问日志，如下：

vim nginx.conf

   location ~* ^/mobileWeb/.*$ {
       include deny.conf;

       proxy_pass http://mobilewebbackend;
       include proxy.conf;

       error_log  logs/mobileweb_error.log error;
       access_log  logs/mobileweb_access.log  main;

       include gzip.conf;
    }

再去logs目录查看日志文件，如下：

[root@xx logs]# ll /usr/local/nginx/logs/mobileweb*
-rw-r--r--. 1 root root 10946 7月 18 10:36 /usr/local/nginx/logs/mobileweb_access.log
-rw-r--r--. 1 root root 1628 7月 18 10:36 /usr/local/nginx/logs/mobileweb_error.log

3 添加启动服务

[root@localhost nginx]# cat /etc/init.d/nginx

!/bin/bash

chkconfig:2345 70 70

description:nginx

BIN=/usr/nginx/sbin/nginx
function d_start {
$BIN || echo -n "nginx is running"
}

function d_stop {
$BIN -s stop || echo -n "nginx is not running"
}

function d_reload {
$BIN -s reload || echo -n "nginx reload failed"
}

case $1 in
start)
echo start nginx
d_start
;;
stop)
echo stop nginx
d_stop
;;
reload)
echo reload nginx
d_reload
;;
restart)
echo restart nginx
d_stop
echo sleep 5s
sleep 5
d_start
;;
*)
echo "Usage: nginx [start | stop |reload |restart]"
;;

esac
exit 0
启动： service nginx start;

4 制作证书Key。
4.1.首先要生成服务器端的私钥(key文件):

openssl genrsa -des3 -out server.key 2048

Enter pass phrase for server.key:gongsilong0617

4.2.用server.key生成一个证书：

openssl req -new -key server.key -out server.csr
pass phrase: gongsilong0617

[root@localhost ssl]# openssl req -new -key server.key -out server.csr
Enter pass phrase for server.key:
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,

If you enter '.', the field will be left blank.

Country Name (2 letter code) [GB]:cn
State or Province Name (full name) [Berkshire]:shanghai
Locality Name (eg, city) [Newbury]:shanghai
Organization Name (eg, company) [My Company Ltd]:gongsilong
Organizational Unit Name (eg, section) []:business
Common Name (eg, your name or your server's hostname) []:ops
Email Address []:mch@gongsilong.com

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:gongsilong0617
An optional company name []:gongsilong
[root@localhost ssl]#

4.3. 对客户端也作同样的命令生成key及csr文件

openssl genrsa -des3 -out client.key 2048
pass phrase: plclient0618

[root@localhost client]# openssl req -new -key client.key -out client.csr
Enter pass phrase for client.key:
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,

If you enter '.', the field will be left blank.

Country Name (2 letter code) [GB]:cn
State or Province Name (full name) [Berkshire]:shanghai
Locality Name (eg, city) [Newbury]:shanghai
Organization Name (eg, company) [My Company Ltd]:gongsilong
Organizational Unit Name (eg, section) []:business
Common Name (eg, your name or your server's hostname) []:ops
Email Address []:mch@gongsilong.com

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:plclient0618
An optional company name []:gongsilong

4.4 生成的CSR证书文件必须有CA的签名才可形成证书.这里制作自己的CA 这时生成一个KEY文件ca.key 和根证书ca.crt

pass phrase: gongsilong0617

[root@localhost ssl]# openssl req -new -x509 -nodes -keyout ca.key -out ca.crt
Generating a 1024 bit RSA private key
.......++++++
................++++++
writing new private key to 'ca.key'
Enter PEM pass phrase:

Verifying - Enter PEM pass phrase:

You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,

If you enter '.', the field will be left blank.

Country Name (2 letter code) [GB]:cn
State or Province Name (full name) [Berkshire]:shanghai
Locality Name (eg, city) [Newbury]:
writing new private key to 'ca.key'Organization Name (eg, company) [My Company Ltd]:
[root@localhost ssl]# openssl req -new -x509 -keyout ca.key -out ca.crt
Generating a 1024 bit RSA private key
..............++++++
..................................................++++++
writing new private key to 'ca.key'
Enter PEM pass phrase:

Verifying - Enter PEM pass phrase:

You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,

If you enter '.', the field will be left blank.

Country Name (2 letter code) [GB]:cn
State or Province Name (full name) [Berkshire]:shanghai
Locality Name (eg, city) [Newbury]:shanghai
Organization Name (eg, company) [My Company Ltd]:gongsilong
Organizational Unit Name (eg, section) []:business
Common Name (eg, your name or your server's hostname) []:ops
Email Address []:mch@gongsilong.com
[root@localhost ssl]#
[root@localhost ssl]# mch@gongsilong.com
-bash: mch@gongsilong.com: command not found
[root@localhost ssl]#

签署证书准备工作：

[root@mail ssl]# vim /etc/pki/tls/openssl.cnf

dir = ../../CA //修改如下

dir = /etc/pki/plocc/CA

touch /etc/pki/plocc/CA/{index.txt,serial}
[root@localhost ssl]# ll /etc/pki/plocc/CA/
总计 0
-rw-r--r-- 1 root root 0 06-18 10:47 index.txt
-rw-r--r-- 1 root root 0 06-18 10:47 serial
[root@localhost ssl]# echo 01 > /etc/pki/plocc/CA/serial
[root@localhost ssl]# mkdir /etc/pki/plocc/CA/newcerts

4.5 用生成的CA的证书(ca.crt)为刚才生成的server.csr,client.csr文件签名

pass phrase:gongsilong0617
openssl ca -in server.csr -out server.crt -cert ca.crt -keyfile ca.key

[root@localhost ssl]# openssl ca -in server.csr -out server.crt -cert ca.crt -keyfile ca.key
Using configuration from /etc/pki/tls/openssl.cnf
Enter pass phrase for ca.key:
Check that the request matches the signature
Signature ok
Certificate Details:

    Serial Number: 1 (0x1)
    Validity
        Not Before: Jun 18 04:04:09 2014 GMT
        Not After : Jun 18 04:04:09 2015 GMT
    Subject:
        countryName               = cn
        stateOrProvinceName       = shanghai
        organizationName          = baolong
        organizationalUnitName    = business
        commonName                = ops
        emailAddress              = mch@gongsilong.com
    X509v3 extensions:
        X509v3 Basic Constraints: 
            CA:FALSE
        Netscape Comment: 
            OpenSSL Generated Certificate
        X509v3 Subject Key Identifier: 
            52:6A:D9:56:CB:2B:DA:E3:9A:18:CC:FE:4D:A1:8C:21:86:55:D5:11
        X509v3 Authority Key Identifier: 
            keyid:4E:F5:29:7F:6B:AD:11:EF:FC:44:CC:76:1D:B0:B9:F7:4B:9D:CB:93

Certificate is to be certified until Jun 18 04:04:09 2015 GMT (365 days)
Sign the certificate? [y/n]:y

1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated
[root@localhost ssl]#

[root@localhost ssl]# openssl ca -in client.csr -out client.crt -cert ca.crt -keyfile ca.key
Using configuration from /etc/pki/tls/openssl.cnf
Enter pass phrase for ca.key:
Check that the request matches the signature
Signature ok
Certificate Details:

    Serial Number: 2 (0x2)
    Validity
        Not Before: Jun 18 04:10:40 2014 GMT
        Not After : Jun 18 04:10:40 2015 GMT
    Subject:
        countryName               = cn
        stateOrProvinceName       = shanghai
        organizationName          = baolong
        organizationalUnitName    = business
        commonName                = ops
        emailAddress              = mch@gongsilong.com
    X509v3 extensions:
        X509v3 Basic Constraints: 
            CA:FALSE
        Netscape Comment: 
            OpenSSL Generated Certificate
        X509v3 Subject Key Identifier: 
            E2:64:97:DC:A6:2B:85:53:5F:6C:5C:8D:1F:EB:59:C8:2C:66:C5:10
        X509v3 Authority Key Identifier: 
            keyid:4E:F5:29:7F:6B:AD:11:EF:FC:44:CC:76:1D:B0:B9:F7:4B:9D:CB:93

Certificate is to be certified until Jun 18 04:10:40 2015 GMT (365 days)
Sign the certificate? [y/n]:y

1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries
Data Base Updated
[root@localhost ssl]#

[PS]：附带功能：
另外，这个certificate是BASE64形式的,要转成PKCS12才能装到IE,/NETSCAPE上.转换如下：

双击安装就行
openssl pkcs12 -export -clcerts -in client.crt -inkey client.key -out client.p12
这个是ISO 需要的证书格式
openssl x509 -in client.crt -out client.cer
这个是android 需要的证书格式。
[root@mail ssl]# openssl pkcs12 -export -in client.crt -inkey client.key -out client.pfx
Enter pass phrase for client.key: //客户端私钥密码
Enter Export Password: //pfx文件导入要求的密码
Verifying - Enter Export Password:

[root@localhost conf]# service nginx stop
stop nginx
Enter PEM pass phrase:
phrase is too short, needs to be at least 4 chars
Enter PEM pass phrase:
phrase is too short, needs to be at least 4 chars
Enter PEM pass phrase:

nginx启动SSL默认不输入密码
如果nginx配置了SSL，在每次启动nginx的时候都会需要你手动输入证书的密码，如果不想输入，可以

cp server.key server.key.orig
openssl rsa -in server.key.orig -out server.key

这样启动nginx的时候就不需要输入密码了。

[root@localhost ssl]# cp server.key server.key.orig
[root@localhost ssl]# openssl rsa -in server.key.orig -out server.key
Enter pass phrase for server.key.orig:
unable to load Private Key
20487:error:06065064:digital envelope routines:EVP_DecryptFinal_ex:bad decrypt:evp_enc.c:325:
20487:error:0906A065:PEM routines:PEM_do_header:bad decrypt:pem_lib.c:425:
[root@localhost ssl]#

这里奇怪，一开始通不过，但是过了15分钟后，在运行一遍，输入密码，又通过了，如下所示：

[root@localhost ssl]# openssl rsa -in server.key.orig -out server.key
Enter pass phrase for server.key.orig:
writing RSA key
[root@localhost ssl]#

当然也可以保留密码，改用expect的方式，这个可以参考expect自动登录SSH的方法，下次有时间再整理贴上来

5 静态文件地址映射 nginx

location = userWeb/userCenter/findConsultList.htm {

       rewrite ^.*$ http://xx.gongsilong.com/xx/xx/findConsultList.htm;
    }

# add by tim begin ...

    location ~* ^/svn/(.*) {
       rewrite ^.*$ https://192.123.11.12/$1;
    }
    # add by tim end .. 

conference：http://blog.chinaunix.net/uid-22006903-id-149747.html