nginx根据cookie分流
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apache001：192.168.1.1:8080apache002：192.168.1.2:8080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 cookieset $group "root";if ($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;}} map $COOKIE_id $group { 700003508 admin; ~*3$ admin; default user; } upstream backend_user { server 10.3.24.11:8080; } upstream backend_admin { server 10.3.25.21:8081; } server { listen 80; server_name photo.domain.com; location / { proxy_pass http://backend_$group; } } 首先，是在nginx里面配置一个映射，$COOKIE_id可以解析出cookie里面的id字段，$group是一个变量，{}里面是映射规则，这样，如果一个id为700003508的人来访问，$group就等于admin。然后在server里面使用就会代理到http://backend_admin上
转自：http://blog.csdn.net/yanook/article/details/8275716