docker: SSH access directly into container

Question

Up to now we use several linux users:

• system_foo@server
• system_bar@server
• ...

We want to put the system users into docker cont

Answer 1

Some months ago, I helped my like this. It's not nice, but works. But pub-key auth needs to be used.

Script which gets called via command in .ssh/authorized_keys

#!/usr/bin/python
import os
import sys
import subprocess
cmd=['ssh', 'user@localhost:2222']
if not 'SSH_ORIGINAL_COMMAND' in os.environ:
    cmd.extend(sys.argv[1:])
else:
    cmd.append(os.environ['SSH_ORIGINAL_COMMAND'])
sys.exit(subprocess.call(cmd))

file system_foo@server: .ssh/authorized_keys

command="/home/modwork/bin/ssh-wrapper.py" ssh-rsa AAAAB3NzaC1yc2EAAAAB...

If the remote system does ssh system_foo@server the SSH-Daemon at server executes the comand given in .ssh/authorized_keys. This command does a ssh to a different ssh-daemon.

In the docker container, there needs to run ssh-daemon which listens on port 2222.