Deploy simple server using Flask on AWS

Question

I'm using this Python code to see if I can view the simple AWS server however, I'm still not able to load the webpage properly.

from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return "It works!"

if __name__ == '__main__':
    app.run(port=80, host='0.0.0.0')

In AWS, inbound:

HTTP TCP port 80 with a source of: 0.0.0.0/0
SSH TCP port 22 with a source of: 0.0.0.0/0

Outbound - everything is allowed.

I'm seeing no errors on terminal when I start the program. The console says Running on http://127.0.0.1:5000/ (Press CTRL+C to quit) so I'm trying to load http://[email protected]:5000

AKX · Accepted Answer · 2017-04-12 06:30:15Z

1

Flask defaults to binding to 127.0.0.1:5000.

If you're trying to access http://[email protected]:5000 , you'll need to have port 5000 opened in the inbound firewall rules and bind to 0.0.0.0 instead of 127.0.0.1.

edited Apr 12, 2017 at 6:30

answered Apr 12, 2017 at 6:24

AKX

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3 Comments

user1883614 Over a year ago

I did a custom TCP rule for port 5000 but also opened all TCP for all ports but it's still not loading.

AKX Over a year ago

@user1883614 I edited the post to take the binding host into account.

user1883614 Over a year ago

added that in my post above, same issue though.

DonerKebab · Accepted Answer · 2017-04-12 07:18:18Z

0

You can not use port 80 for your web application. Let it run on default port then host your web application by mod_wsgi or uWSGI... Check the deployment options here: http://flask.pocoo.org/docs/0.12/deploying/ .

Imo: better if you deploy your application on AWS Elastic Beanstalk. Give me a shout if you need a sample project.

answered Apr 12, 2017 at 7:18

DonerKebab

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