问题
In nginx the proxy_pass directive is not resolving DNS using the /etc/hosts file. Any way to enable this possibility (maybe by leveraging Lua as a last resort)?
回答1:
In short, you need to install dnsmasq locally and use 127.0.0.1 as a resolver.
See this related question and answer:
When using proxy_pass, can /etc/hosts be used to resolve domain names instead of "resolver"?
回答2:
If you have a server with systemd you can use the nameserver shipped with it, systemd-resolved, to resolve your hostnames from the /etc/hosts file.
Just add this to your nginx config http, server or location block:
resolver 127.0.0.53;
Use systemctl status systemd-resolved.service to see if it running on your server.
来源：https://stackoverflow.com/questions/29980884/proxy-pass-does-not-resolve-dns-using-etc-hosts