1、负载均衡类型

负载均衡分为：轮询、权限、ip_hash，其中轮询为默认类型；

2、配置负载均衡

2.1、默认配置(轮询)

			upstream demo-proxy {
				#默认为轮询
				server 39.106.136.224:10008 ;
				server 39.106.136.224:10009 ;
			}

			server {
			.....
			location /demo {
				proxy_pass         http://demo-proxy;
				port_in_redirect   on;
				proxy_redirect     off;
				proxy_set_header   Host             $host;
				proxy_set_header   X-Real-IP        $remote_addr;
				proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
				proxy_set_header   Upgrade $http_upgrade;
				proxy_set_header   Connection "upgrade";
				}
			}

2.2、权重

			upstream demo-proxy {
				#设置权重
				server 39.106.136.224:10008 weight=2;
				server 39.106.136.224:10009  weight=1;
			}
			
			server {
			.....
			location /demo {
				proxy_pass         http://demo-proxy;
				port_in_redirect   on;
				proxy_redirect     off;
				proxy_set_header   Host             $host;
				proxy_set_header   X-Real-IP        $remote_addr;
				proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
				proxy_set_header   Upgrade $http_upgrade;
				proxy_set_header   Connection "upgrade";
				}
			}

2.3、ip_hash

			upstream demo-proxy {
				#ip_hash类型 
				ip_hash;
				server 39.106.136.224:10009 ;
				server 39.106.136.224:10008 ;
			}
			
			server {
			.....
			location /demo {
				proxy_pass         http://demo-proxy;
				port_in_redirect   on;
				proxy_redirect     off;
				proxy_set_header   Host             $host;
				proxy_set_header   X-Real-IP        $remote_addr;
				proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
				proxy_set_header   Upgrade $http_upgrade;
				proxy_set_header   Connection "upgrade";
				}
			}