基于nginx proxy dns server

version: "3"
services: 
  lb: 
    image: openresty/openresty:alpine
    volumes:
    - "./nginx-lb.conf:/usr/local/openresty/nginx/conf/nginx.conf"
    - "./dns.log:/var/log/nginx/dns.log"
    ports:
    - "53:53/udp"
    - "53:53/tcp"

worker_processes  1;
user root;  
events {
    worker_connections  1024;
}
stream {
     upstream dns_servers {
        server 114.114.114.114:53;
        server 8.8.8.8:53;
        server 8.8.8.4:53;
    }
    server {
        listen 53  udp;
        listen 53; #tcp
        proxy_pass dns_servers;
        error_log  /var/log/nginx/dns.log info;
    }
}

docker-compose up -d

dig @127.0.0.1 baidu.com