docker ps output

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                                                NAMES
e53a722096f0        aafd21071b99        /opt/bin/run_all    41 minutes ago      Up 28 minutes       127.0.0.1:49251->22/tcp, 127.0.0.1:49252->9200/tcp   es-b
0208431f9c7b        aafd21071b99        /opt/bin/run_all    41 minutes ago      Up 28 minutes       127.0.0.1:49249->22/tcp, 127.0.0.1:49250->9200/tcp   es-a

dssh

#!/usr/bin/env python
import sys
import subprocess
import json

cmd = 'sudo docker inspect {}'.format(sys.argv[1])
output = subprocess.check_output(cmd, shell=True).decode('utf-8')
data = json.loads(output)

port  = data[0]['NetworkSettings']['Ports']['22/tcp'][0]['HostPort']

cmd = 'ssh root@localhost -p {}'.format(port)
subprocess.call(cmd, shell=True)

port string

127.0.0.1:49251->22/tcp

ssh command

ssh root@localhost -p 49251