Containerizing a simple Python Flask app using Docker 

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Magina! Eu que agradeço o apoio!

Glad you think so!

We definitely do! Gunicorn and uvicorn are frameworks to host your python process in a more efficient/streamlined manner, which allows it to be safer and faster. Similarly, nginx is a webserver that could be used as a method to host, route, proxy, cache, etc. As part of the kubernetes series I’m recording, I’ll show you how to use them effectively for your container images and deployments. But a glimpse of that: install uvicorn or gunicorn, then use them as entry points to run your python application that is compatible. Let me know how it goes!

It probably means that you don’t have python3 or the app.py files in your container. Containers are isolated boxes that don’t really replicate anything from local machine. So working locally really doesn’t mean anything. Try checking which base image you are running and whether or not you have copied the files over. Let me know if it works! Also, shoot out the error if it still doesn’t work. Cheers!

Great question! There are good reasons not to allow dynamic changes to your code in containers, but also good reasons to do so! The good reason is really for Dev containers, which are a medium to install all that you need for the development of your app, and attach the volume to your container. Also you’d have to remember to allow hot reload. Now, for actually running this app, don’t do that. You want the code to be packaged with the image and only what you need to run it. You don’t want it to be dynamic and change, it could introduce issues, instability and it is insecure. The point of container images is that they are consistent all the time, I’d recommend trying to stick with that.