Example To Connect From Container To Host Service

I am new to Docker and Drone Programming. I was able to deploy a python script (that contains dronekit code) to docker container on my Windows 10. To run the script, I need to conn

Solution 1:

The endpoint you're looking for is 'http://host.docker.internal'.

Running on MacOs. I will run a service on my macbook just using basic flask on a python:3.6 container with app.py in the root directory:

docker run -it -p 5000:5000 python:3.6 bash

pip install flask

python app.py

# app.py
from flask import Flask

app = Flask(__name__)

@app.route('/', methods=["GET"])
def main():
    return {'a': 1, 'b': 2}

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=5000, debug=True)

Then just running in another container

import requests

r = requests.get('http://host.docker.internal:5000')

r.json()
{'a': 1, 'b': 2}

Solution 2:

Simply, response to my question is:

mydronectrlscript.py:

from dronekit import connect
# Connect to UDP endpoint.
vehicle = connect(‘udp:host.docker.internal:14550’, wait_ready=True)
# Use returned Vehicle object to query device state - e.g. to get the mode:
print(“Mode: %s” % vehicle.mode.name)

Also, from what I tried this does not work if you are using Windows 10 Home edition or a version of OS that needs virtual box. This worked on Windows 10 Professional and Mac OS.

Since this question is related to drone programming: If you are eventually trying to access COM ports (for telemetry), it is not possible at the moment with Docker image hosted in Windows OS: https://github.com/docker/for-win/issues/1018

It is possible from Linux based on what I read: Docker - a way to give access to a host USB or serial device?