SSH configuration in host with multiple services

Hi to all,
This is not really an issue, but I didn't know how to share this config.

I installed the image in a server already managing different services, and exposing ssh to different users for different purposes. I have no way to manage dns records for this machine, so I wanted to have a 'proxy' for SSH to forward requests made to the git user to the embedded SSH server in the image.

Instead I ended up with a different (possibly simpler) solution. The idea is:

• have your container mount its volume data at /home/git/data:/home/git/data;
• every new ssh key will be stored in /home/git/data/.ssh/authorized_keys and its entries will contain the command /home/git/gitlab-shell/bin/gitlab-shell key-x

So if you create in /home/git/gitlab-shell/bin/gitlab-shell a script like this:

#!/bin/bash
docker exec -i gitlab_gitlab_1 sh -c \
 "SSH_CONNECTION='$SSH_CONNECTION' SSH_ORIGINAL_COMMAND='$SSH_ORIGINAL_COMMAND' /home/git/gitlab-shell/bin/gitlab-shell $1"

Assuming that gitlab_gitlab_1 is the name of your gitlab container, this calls the command gitlab-shell into the container from the outside, using your host ssh server, only on the git user.
The only remaining bit is to link your .ssh/authorized_keys to the one manager by gitlab.

I just implemented this solution and it works. It allowed me to expose gitlab without arranging a different machine and having a single server exposing ssh to many users.

Are there other simpler solutions out there?

The issue contains a host SSH workaround using a mounted /home/git/data volume, an authorized_keys entry, and a shell script invoking docker exec. No repository files or tests are mentioned; first determine whether this configuration belongs in the project documentation, and consider the request complete only when a supported, documented approach is agreed.