I had issues getting Gitlab to play nice with version 2 of the Traefik reverse proxy. This post shows how to set up the Docker container with the correct labels applicable for the new version.
My initial assumption that Traefik would forward requests to port 80 by default as this is the case for all my other containers. It turns out that Traefik will forward to the first port registered by the container.
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In the case of Gitlab, this is the SSH port, giving a strange “Internal Server Error” notice or “Bad Gateway”. The solution is to specifically tell the proxy container to forward to port 80 using the last label shown below. I found the solution on this Stack Overflow question.
Gitlab Container Labels for Traefik v2
labels:
- "traefik.enable=true"
- "traefik.http.routers.gitlab.rule=Host(`gitlab.example.com`)"
- "traefik.http.routers.gitlab.entrypoints=https"
- "traefik.http.routers.gitlab.tls.certresolver=myhttpchallenge"
- "traefik.http.services.gitlab.loadbalancer.server.port=80"MY MISSION
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