利用nginx做负载均衡

• round-robin：轮询。以轮询方式将请求分配到不同服务器上，默认
• least-connected：最少连接数。将下一个请求分配到连接数最少的那台服务器上
• ip-hash ：基于客户端的IP地址。散列函数被用于确定下一个请求分配到哪台服务器上

nginx.conf

 upstream myapp {
        #least_conn;
        #ip_hash;
        #server 192.168.10.29:80 weight=3; #值越大权重就越大
        server 192.168.10.29:80;
        server 192.168.10.29:8090;
    }

    server {
        listen       8080;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            proxy_pass        http://myapp;
            proxy_set_header   Host             $host;
            proxy_set_header   X-Real-IP        $remote_addr;
            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
            #root   html;
            #root   /Users/zhoutingze/vhost/8080;
            #index  index.html index.htm index.php;
            #rewrite ^(.*)$ index.php/$1;
            #rewrite (.*) /index.php;
        }