1
2
3
4
5
6
7
8
upstream api.com {
    ip_hash;
    server 127.0.0.1:81 weight=2 max_fails=3 fail_timeout=15;
    server 127.0.0.1:82 weight=3;
    server 127.0.0.1:83 backup;
    server 127.0.0.1:84 down;
    server 127.0.0.1:85 max_conns=1000;
}