nginx upstream應用

nginx負載均衡，基本上都會用到upstream配置

server {
        listen    80;
        server_name m.static.com;
        access_log  /data/logs/nginx/m.static.com.access.log main;
        keepalive_timeout 60;
        location  / {
           proxy_pass http://backend.server;
           proxy_redirect off ;
           proxy_set_header Host $host;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header REMOTE-HOST $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_max_temp_file_size 0;

        }
}
#1.輪詢。即每個請求按照時間順序輪流配置設定到不同的後端伺服器，如果某個後端伺服器down掉後，能自動剔除。一般采取這種方式
upstream backend.server {
    server 127.0.0.1:8085; 
    server 127.0.0.2:8085;
}
#2.權重輪詢。權重越高，通路量越大
upstream backend { 
    server 192.168.1.101 weight=1;
    server 192.168.1.102 weight=2; 
}