Traefik Docker Compose example

Traefik Traefik v3 (latest)
1

As per example for Docker Compose found here: Traefik Docker Documentation - Traefik

I should see the X-Real-Ip from my local network 192.168.0.x

However I'm seeing IP addresses from docker network, what is the problem?

Hostname: dac61fc13602
IP: 127.0.0.1
IP: ::1
IP: 172.21.0.2
RemoteAddr: 172.21.0.3:55350
GET / HTTP/1.1
Host: whoami.localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate, br, zstd
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8,lt;q=0.7
Cache-Control: max-age=0
Dnt: 1
Sec-Ch-Ua: "Google Chrome";v="135", "Not-A.Brand";v="8", "Chromium";v="135"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "Windows"
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: none
Sec-Fetch-User: ?1
Upgrade-Insecure-Requests: 1
X-Forwarded-For: 172.21.0.1
X-Forwarded-Host: whoami.localhost
X-Forwarded-Port: 80
X-Forwarded-Proto: http
X-Forwarded-Server: d743d4f46f2f
X-Real-Ip: 172.21.0.1
2

How do you run Docker?

3

I'm running it on my windows machine, by executing

docker compose up -d
4

Docker is a Linux tool, so it doesn't simply run on Windows. It might work with Docker Desktop or WSL2, but both use a VM to run Linux to run Docker. Because of the extra layer the IP packets are routed and IP addresses are changed.

5

Makes sense. Just tried running on linux VPS and it does actually show my real IP address.

However, when running in docker stack

docker stack deploy -c docker-compose.yaml traefik

It shows docker host IP address. Is it because of a swarm mode enabled for stack to operate? What is the solution?

6

Just 2 days ago, 6 posts down, this was recently discussed.

7

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