nginx 多级代理

nginx

upstream backend {
        server  ip1:80;
        server  ip2:80;
}

server {
    resolver 10.10.235.22;
    resolver_timeout 5s;

    listen 0.0.0.0:80;

    #access_log  /home/reistlin/logs/proxy.access.log;
    #error_log   /home/reistlin/logs/proxy.error.log;

    location / {
        #proxy_pass $scheme://$host$request_uri;
        proxy_pass http://backend;
        proxy_set_header Host $http_host;

        proxy_buffers 256 4k;
        proxy_max_temp_file_size 0;

        proxy_connect_timeout 30;

        proxy_cache_valid 200 302 10m;
        proxy_cache_valid 301 1h;
        proxy_cache_valid any 1m;
    }
}