nginx.conf

worker_processes auto;
daemon off;
error_log stderr warn;
worker_rlimit_nofile 131072;
user nobody nogroup;

events {
    worker_connections 16384;
}

http {
    include resolvers.conf;

    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    access_log /dev/stdout;
    keepalive_timeout  75;
    keepalive_requests 100;
    proxy_read_timeout 30s;
    proxy_send_timeout 30s;

    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
    proxy_set_header X-Forwarded-Port $http_x_forwarded_port;
    proxy_http_version 1.1;

    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    client_body_temp_path /tmp/client_body 1 1;
    proxy_temp_path /tmp/proxy 1 1;

    lua_shared_dict ingress 8m;
    lua_shared_dict dns_cache 16m;

    lua_package_path '.?.lua;./lib/?.lua;;';

    server {
        listen 8080 default_server;

        location /nginx_status {
            stub_status on;
        }

        location /healthz {
            echo ok;
        }

        location /config {
           content_by_lua 'require("ingress").config(ngx)';
        }
    }

    init_by_lua 'require("ingress").init(ngx, {})';
    init_worker_by_lua 'require("ingress").init_worker(ngx)';

    server {
        listen 80 default_server;
        location / {
            set $upstream_host '';
            set $upstream_port '';
            access_by_lua 'require("ingress").content(ngx)';
            proxy_pass http://$upstream_host:$upstream_port$request_uri;
        }
    }
}