Kubernetes Cookbook - Second Edition

Frontend WebUI

Build WebUI that uses preceding microservice by following steps:

1. Here is the simple frontend WebUI that also uses Python Flask:

$ cat entry.pyimport osimport httplibfrom flask import Flask, request, render_templateapp = Flask(__name__)@app.route("/")def index():    return render_template('index.html')@app.route("/add", methods=['POST'])def add():    #    # from POST parameters    #    x = int(request.form['x'])    y = int(request.form['y'])    #    # from Kubernetes Service(environment variables)    #    my_calc_host = os.environ['MY_CALC_SERVICE_SERVICE_HOST']    my_calc_port = os.environ['MY_CALC_SERVICE_SERVICE_PORT']    #    # REST call to MicroService(my-calc)    #    client = httplib.HTTPConnection(my_calc_host, my_calc_port) client.request("GET", "/addition/%d/%d" ...