/docker-swarm-with-correct-remote-addr

MIT LicenseMIT

Docker Swarm with correct REMOTE_ADDR

Example repository to show how to get an HTTP server running inside a Docker Swarm environment and still be able to read the correct REMOTE_ADDR.

This repository does not include an backend service to read the request and show the remote address.

Motivation

moby/moby/issues/25526

Requirements

Port 80 open (or just change the docker-compose.yml file)

Deploying

$ docker stack deploy -c docker-compose.yml swarm-example

Now if you inspect the service logs, you will see that the remote address is not an internal docker overlay network, but rather, your actual IP address, and that address will be sent to any backend service that reads the X-Forwarded-Host.

$ curl http://node-address/
$ docker service logs swarm-example_server
...
swarm-example_server.0.uzze1mupb1n9@node1    | 123.45.67.89 - - [19/Feb/2019:10:09:07 +0000] "GET / HTTP/1.1" 502 388
...