Nginx根据cookie分流负载均衡【转载】

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  • 742
  • linux
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  • dodobook
  • 2018/01/22

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;
	}

}

 

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

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