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利用nginx实现分流

2016-08-27 16:47 225 查看
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;
}

}

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