bar.py

from flask import Flask
app = Flask(__name__)

@app.route('/bar')
def hello():
    return '{"msg":"Hello from the bar microservice"}'

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

build-and-push.sh

#!/bin/bash

TAG=0.1

set -euo pipefail

docker login

for svc in foo bar; do
  docker build -f Dockerfile.$svc -t $svc .
  docker tag $svc digitalronin/$svc-microservice:0.1
  docker push digitalronin/$svc-microservice:0.1
done

Dockerfile.bar

FROM python:3-alpine

WORKDIR /app

RUN echo "Flask==1.1.1" > requirements.txt
RUN pip install -r requirements.txt
COPY bar.py .

EXPOSE 5000

CMD ["python", "bar.py"]

Dockerfile.foo

FROM python:3-alpine

WORKDIR /app

RUN echo "Flask==1.1.1" > requirements.txt
RUN pip install -r requirements.txt
COPY foo.py .

EXPOSE 5000

CMD ["python", "foo.py"]

foo.py

from flask import Flask
app = Flask(__name__)

@app.route('/foo')
def hello():
    return '{"msg":"Hello from the foo microservice"}'

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