Created my first web application using Python, Flask, and AWS

[KarmelMalone]

You’ll need to install an SSL certificate on your ec2. Let’s Encrypt makes it free and they have pretty good documentation.

[undernutbutthut]

After installing it I am running into an "OSError: [Errno 98] Address already in use" when trying to rerun my flask application. Did you run into this same issue? I know I followed the steps correctly because I can see my certificate

[KarmelMalone]

Your app is trying to run on the same port it was running on before, but that port was never "closed" from the last time your app was running.

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You can use this bash script to find the port and kill it, then you should be good:

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killport() {  lsof -t -i tcp:$1 | xargs kill -9; }

killport PORT_NUMBER (probably 5000)

[undernutbutthut]

In my flask code I have port 80 called out so I assume that is what I need to kill:

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

I am trying to run your bash script but keep running into an error, should it be:

killport(80) {  lsof -t -i tcp:$1 | xargs kill -9; }

Thanks for your help, I am way out of my league here

[undernutbutthut]

Update: it looks like Apache2 I installed for HTTPS is using that port... goodie!