Use Nginx server load balancer with reverse proxy

Nginx server load balancer works with reverse proxy settings in the http segment: www.2cto. comupstreammy_server_pool {server192.168.10.21: 80weight1max_fails2fail_timeout30s; server192.168.10.20: 80weight1 ..
Set it in the http segment: www.2cto.com upstream my_server_pool {
Server 192.168.10.21: 80 weight = 1 max_fails = 2 fail_timeout = 30 s;
Server 192.168.10.20: 80 weight = 1 max_fails = 2 fail_timeout = 30 s;
Proxy_cache_path/usr/local/nginx/proxy_temp levels = keys_zone = cache_one: 500 m inactive = 1d max_size = 1g;
Set in the server segment: www.2cto.com

Location/sms {
Proxy_pass http: // my_server_pool;
Proxy_set_header Host $ host;
Proxy_cache cache_one;
Proxy_set_header X-Forwarded-For $ remote_addr;
Proxy_cache_valid 200 10 m;
Proxy_cache_valid 304 1 MB;
Proxy_cache_valid 301 302 1 h;
Proxy_cache_valid any 1 m;
Proxy_cache_key $ host $ uri $ is_args $ args;} test: