HELP!... ConnectionRefusedError: [Errno:111] Connection Refused

Docker Engine Compose
1

when in Command Prompt and I try to run ‘docker-compose up’ Docker-compose starts up, but gets interrupted with the following message:
…
requests.exceptions.ConnectionError: HTTPConnectionPool(host=‘127.0.0.1’, port=4040): Max retries exceeded with url: /api/tunnels (Caused by NewConnectionError(’<urllib3.connection.HTTPConnection object at 0x7fe259c34be0>: Failed to establish a new connection: [Errno 111] Connection refused’,))
…
I don’t think it can be a Firewall issue because I replicated the same issue on my computer at home away from work, and it resulted in the same exact issue.
What could be the issue here?

cmx%20Connection%20Error
cmx Connection Error.png1914×1042 54.1 KB

2

Need to see what’s in your image start script or CMD

3

My Dockerfile goes as -->

FROM python:3.6-alpine

COPY . .

RUN pip install -r requirements.txt

EXPOSE 5004

CMD python cmxnotificationreceiver.py -u learning -p learning -l cmxlocationsandbox.cisco.com -i vy

and Docker-compose.yml -->

version: '2'

services:

  cmxnotificationreceiver:
    build: ./
    restart: on-failure
    container_name: cmxnotificationreceiver
    ports:
     - "0.0.0.0:5004:5004"
    volumes:
     - .:/cmxnotificationreceiver
    mem_limit: 100M

  ngrok:
    container_name: ngrok
    ports:
      - "0.0.0.0:4040:4040"
    image: wernight/ngrok
    links:
      - "cmxnotificationreceiver"
    environment:
      - NGROK_PORT=cmxnotificationreceiver:5004
    mem_limit: 100M
4

So clearly the error is coming from you python code … cmxnotificationreceiver.py

5

Make sure your process which will acquired the port 4040 is started inside you container before starting you python script.