利用nginx实现分流

转自http://neoremind.com/2012/03/nginx%E6%A0%B9%E6%8D%AEcookie%E5%88%86%E6%B5%81/

众所周知，nginx可以根据url path进行分流，殊不知对于cookie分流也很强大，同时这也是我上篇提到的小流量实验的基础。

 

二话不说，先看需求，两台服务器分别定义为

apache001：192.168.1.1:8080

apache002：192.168.1.2:8080

 

默认服务器为：

default：192.168.1.0:8080

 

前端nginx服务器监听端口8080，需要根据cookie转发，查询的cookie的键（key）为abcdexpid，如果该cookie值（value）以1结尾则转发到apache001，以2结尾则转发到apache002。

 

方案1：

用map，nginx.conf配置如下：

 

map $COOKIE_abcdexpid $group {
	~*1$	apache001;
	~*2$	apache002;
	default	root;
}
 
upstream apache001 {
	server 192.168.1.1:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
upstream apache002 {
	server 192.168.1.2:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
upstream root {
	server 192.168.1.0:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
server {
	listen       8080;
	server_name  neoremind.net;
 
	log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
					  '$status $body_bytes_sent "$http_referer" "group=$group"'
					  '"$http_user_agent" $gzip_ratio $request_time "$http_x_forwarded_for"';
 
	access_log  logs/access_log main;
	error_log   logs/error_log;
 
	location / {
        proxy_pass http://$group;
		proxy_set_header X-Forwarded-For $remote_addr;
    }	
}

 

 

方案2：

利用set和if…else… ，nginx.conf配置如下：

 

 
upstream apache001 {
	server 192.168.1.1:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
upstream apache002 {
	server 192.168.1.2:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
upstream root {
	server 192.168.1.0:8080 weight=1 max_fails=1 fail_timeout=30s;
}
 
server {
	listen       8080;
	server_name  beidoutest.baidu.com;
 
	#match cookie
	set $group "root";
	if ($http_cookie ~* "abcdexpid=([^;]+)(1$)"){
		set $group apache001;
	}
	if ($http_cookie ~* "abcdexpid=([^;]+)(2$)"){
		set $group apache002;
	}
 
	log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
					  '$status $body_bytes_sent "$http_referer" "group=$group"'
					  '"$http_user_agent" $gzip_ratio $request_time "$http_x_forwarded_for"';
 
	access_log  logs/access_log main;
	error_log   logs/error_log;
 
	location / {
		proxy_pass http://$group;
		proxy_set_header X-Forwarded-For $remote_addr;
	}
 
}