Kubernetes Cookbook - Second Edition

Microservices

Build a microservice which provides a simple math function by using following steps:

1. Here is the simple microservice using Python Flask (http://flask.pocoo.org/):

$ cat entry.pyfrom flask import Flask, request app = Flask(__name__)@app.route("/")def hello():    return "Hello World!" @app.route("/power/<int:base>/<int:index>")def power(base, index):     return "%d" % (base ** index)
@app.route("/addition/<int:x>/<int:y>")
def add(x, y):    return "%d" % (x+y)@app.route("/substraction/<int:x>/<int:y>")
def substract(x, y):    return "%d" % (x-y)
if __name__ == "__main__":    app.run(host='0.0.0.0')

2. Prepare a Dockerfile as follows in order to build the Docker image:

$ cat DockerfileFROM ubuntu:14.04 # Update packages RUN apt-get update -y ...