creating dockers + mongo replicaset using python

mkdockers.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Author: A. Ponimaskin
from __future__ import unicode_literals, absolute_import, print_function

from pymongo import MongoClient
import docker
from six.moves import range
import argparse
from time import sleep
import shutil
import os

argparser = argparse.ArgumentParser()
argparser.add_argument("dir")
args = argparser.parse_args()

c = docker.Client()

image_name = "ponimas/ffmpeg"
rs = "transreplica"
addrs = []

for i in range(1, 5):
    _dbdir = "%s/devenvs/n%s/db" % (args.dir, i)

    shutil.rmtree(_dbdir)
    os.mkdir(_dbdir)

    c.create_container(
        image_name, command="supervisord",
        name="dev%s" % i,
        volumes=["/data", "/data/playground"])

    c.start("dev%s" % i,
            binds={
                "%s/devenvs/n%s" % (args.dir, i): "/data",
                "%s/playground" % args.dir: "/data/playground"})
    info = c.inspect_container("dev%s" % i)
    addrs.append(info["NetworkSettings"]["IPAddress"])

print(addrs)
rscfg = {"_id": rs, "members": []}
for i, addr in enumerate(addrs):
    rscfg["members"].append({
        "host": "%s:27017" % addr,
        "_id": i})

sleep(5)
connection = MongoClient(addrs[0], 27017)
connection.admin.command("replSetInitiate", rscfg)