sdbondi
6/22/2017 - 11:01 AM

Use JQ to parse environment variables from docker container and then transform them into arguments to be passing into the docker run command

Use JQ to parse environment variables from docker container and then transform them into arguments to be passing into the docker run command.

docker-vars.py
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#!/usr/bin/env python

import argparse
import json
from subprocess import check_output

def inspect(container):
  return json.loads(check_output(["docker", "inspect", container]))

def prep_arg(string):
  return string.replace(' ', '\\ ').replace('\t', '').replace('\'', '\\\'');

def transform_to_args(env):
  filtered_env = filter((lambda x: not x.startswith('affinity:container')), env)
  return reduce((lambda acc, string: acc + (" -e %s" % prep_arg(string))), filtered_env, "");

def main():
  parser = argparse.ArgumentParser(description='Process some integers.')
  parser.add_argument('docker-id', type=str, help='Docker container id')

  args = vars(parser.parse_args())

  data = inspect(args['docker-id'])
  print transform_to_args(data[0]['Config']['Env'])

if __name__ == "__main__":
  main()