问2个Docker容器中的2个flask应用程序之间的通信

EN

During handling of the above exception, another exception occurred:
slave     | 
slave     | Traceback (most recent call last):
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
slave     |     response = self.full_dispatch_request()
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
slave     |     rv = self.handle_user_exception(e)
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
slave     |     reraise(exc_type, exc_value, tb)
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
slave     |     raise value
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
slave     |     rv = self.dispatch_request()
slave     |   File "/usr/local/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
slave     |     return self.view_functions[rule.endpoint](**req.view_args)
slave     |   File "slave.py", line 21, in home
slave     |     res = requests.get('http://localhost:5001/test')
slave     |   File "/usr/local/lib/python3.8/site-packages/requests/api.py", line 76, in get
slave     |     return request('get', url, params=params, **kwargs)
slave     |   File "/usr/local/lib/python3.8/site-packages/requests/api.py", line 61, in request
slave     |     return session.request(method=method, url=url, **kwargs)
slave     |   File "/usr/local/lib/python3.8/site-packages/requests/sessions.py", line 530, in request
slave     |     resp = self.send(prep, **send_kwargs)
slave     |   File "/usr/local/lib/python3.8/site-packages/requests/sessions.py", line 643, in send
slave     |     r = adapter.send(request, **kwargs)
slave     |   File "/usr/local/lib/python3.8/site-packages/requests/adapters.py", line 516, in send
slave     |     raise ConnectionError(e, request=request)
slave     | requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=5001): Max retries exceeded with url: /test (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f0c81dfdd90>: Failed to establish a new connection: [Errno 111] Connection refused'))
slave     | 172.17.0.1 - - [30/Aug/2020 22:30:35] "GET / HTTP/1.1" 500 -

import time
import random
import redis
from flask import Flask, redirect, url_for, request, render_template
import requests
from pymongo import MongoClient
app = Flask(__name__)

@app.route('/', methods = ['POST', 'GET'])
def home():
    dictToSend = {'question':'what is the answer?'}
    res = requests.get('http://localhost:5001/test')
    print("SLave sent!!!!!!!!!!")

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=5002)

from pymongo import MongoClient
app = Flask(__name__)

@app.route('/test')
def test():
    return '00000'

if __name__ == "__main__":
    app.run(host='0.0.0.0', port = 5001)

    master:
            build: ./master
            container_name: master
            command: python -u master.py && python -m flask run
            ports:
                    - "5001:5001"


    slave:
            build: ./slave
            container_name: slave
            command: python -u slave.py
            ports:
                    - "5002:5002"
            links:
                    - master

res = requests.get('http://localhost:5001/test') 

res = requests.get('http://0.0.0.0:5001/test')

res = requests.get('http://master:5001/test')