Nginx as reverse proxy on docker container

Question

I am using Nginx as a reverse proxy on a docker container. Docker should have internal DNS which resolves container names by finding their ip address.

From the Nginx container if I use ping apache , docker resolves the ip address and the container with apache replies.

If I use the following address, in the nginx configuration it doesn't work and I get 502 bad gateway . I have to manually specify the ip of the docker apache container.

proxy_pass http://apache:8080$request_uri;

Do you have any ideas?

Answer 1

I solved by using this line to set docker dns as resolver within nginx config.

resolver 127.0.0.11;

However I'm not sure that docker dns address won't change over time.