Flask application does not start on heroku server

Question

I am trying to deploy a Flask application with Heroku. This is a simple API. Works fine with the wizard, but I get an error (log below) when running on the hero.

This is my application code (I know this, but look in one block, but I have problems to split it into files):

import flask import flask.ext.sqlalchemy import flask.ext.restless app = flask.Flask(__name__) app.config['DEBUG'] = True app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://user: password@server /db' db = flask.ext.sqlalchemy.SQLAlchemy(app) from sqlalchemy import Column, Integer, String, ForeignKey,\ Date, DateTime, Boolean, Float class fruits(db.Model): __tablename__ = 'fruits' id = Column(Integer, primary_key=True) name = Column(String(50),nullable=False) calories = Column(Integer, nullable=False) amount = Column(Integer, nullable=False) unit = Column(String(10),nullable=False) url = Column(String(100),nullable=True) @app.route('/') def hello_world(): return 'Hello World!' # Create the database tables. db.create_all() # Create the Flask-Restless API manager. manager = flask.ext.restless.APIManager(app, flask_sqlalchemy_db=db) # Create API endpoints, which will be available at /api/<tablename> by # default. Allowed HTTP methods can be specified as well. manager.create_api(fruits, methods=['GET', 'POST', 'DELETE']) manager.create_api(tmp, methods=['GET', 'POST', 'DELETE']) # start the flask loop if __name__ == '__main__': import os port = int(os.environ.get('PORT', 33507)) app.run(host='0.0.0.0', port=port) 

This is the hero’s journal:

 at=error code=H14 desc="No web processes running" method=GET path=/ host=blooming-taiga-1210.herokuapp.com fwd="188.33.19.82" dyno= connect= service= status=503 bytes= 

and my Procfile file:

 web: python __init__.py 

Answer 1

Is there really a working dyno called web ? It looks like you may have forgotten to scale your web speaker :

Add this entry to your Procfile:

 heroku ps:scale web=1 

you can use

 heroku ps 

to confirm that your web speaker is running.