Docker on Elastic Beanstalk - connect() failed (111: Connection refused) while connecting to upstream

Question

I am trying to run a simple Sign Up Flask app on AWS Elastic Beanstalk (this app: https://github.com/jay3dec/PythonFlaskMySQLApp---Part-1 ) connected to an external MySQL database, hosted on AWS RDS.

The app runs perfectly locally (even when I connect to the AWS RDS from my local app).

But when I do eb open in the command line, I get:

502 Bad Gateway

nginx/1.8.1

When I did eb create, I received the warning:

WARN    Only one EXPOSE directive is allowed, using the first one: 3306

because in my Dockerfile, I had:

EXPOSE 3306
EXPOSE 5000

For eb logs, I have:

/var/log/nginx/error.log
-------------------------------------
2016/07/17 15:18:06 [warn] 8928#0: duplicate MIME type "text/html" in /etc/nginx/sites-enabled/elasticbeanstalk-nginx-docker-proxy.conf:11
2016/07/17 15:18:06 [warn] 8934#0: duplicate MIME type "text/html" in /etc/nginx/sites-enabled/elasticbeanstalk-nginx-docker-proxy.conf:11
2016/07/17 15:20:54 [error] 8937#0: *33 connect() failed (111: Connection refused) while connecting to upstream, client: 172.31.6.93, server: , request: "GET /favicon.ico HTTP/1.1", upstream: "http://172.17.0.2:3306/favicon.ico", host: "flasksecgroup-dev.us-east-1.elasticbeanstalk.com", referrer: "http://flasksecgroup-dev.us-east-1.elasticbeanstalk.com/"

My Dockerfile is:

FROM ubuntu:latest

RUN apt-get update -y
RUN apt-get install -y python-pip libmysqlclient-dev python-dev build-    essential
 COPY . /app
WORKDIR /app
RUN pip install -r requirements.txt

# Expose
EXPOSE 3306
EXPOSE 5000

ENTRYPOINT ["python"]
CMD ["app.py"]

Answer 1

This is a port and security firewall issue. Open port 3306 and 5000 to world in your security group. It will work without any error.

Answer 2

如果您可以将Dockerfile添加到存储库中，我可以对其进行检查