Python 3.8 in base container

[Sam Weston]

Is your feature request related to a problem? Please describe.
I noticed that the base container has python 3.6 and it's missing a few features included in 3.8. Is is possible to increase this? I couldn't find the Dockerfile or I'd make a PR.

[Jamie Thompson]

Hey thanks for the suggestion, yep that's a good idea, thinking in the interests of not breaking anything that already uses the python image maybe I could add in a few more images:

• custompodautoscaler/python-3-6
• custompodautoscaler/python-3-7
• custompodautoscaler/python-3-8

Thing is what to do with the existing custompodautoscaler/python image, I'm gonna have a look at the python 3.6 -> 3.8 changelogs and just check if there are any breaking changes listed, if there aren't I'll upgrade the custompodautoscaler/python to 3.8, otherwise I'm not entirely sure what to do with it.

Here's the Dockerfile by the way incase you're interested!
https://github.com/jthomperoo/custom-pod-autoscaler/blob/master/Dockerfile

[Sam Weston]

Sounds good! I clearly wasn't awake yesterday to not see that Dockerfile 🤦

[Jamie Thompson]

So looking through the changelogs, the only breaking change I can see is:

Backwards incompatible syntax changes:

• async and await are now reserved keywords.

From the Python 3.7 changelog.

I think this is a small enough change to not be a major issue, if this affects anyone's autoscalers they can switch over to
custompodautoscaler/python-3-6.

[Jamie Thompson]

OK so those new images are now available in release v1.0.1.

There's a docs page now that describes all supported Docker images and a new example that describes how to use a different Docker image (that may not be supported) with the Custom Pod Autoscaler allowing you to embed the binary into any Docker image you may need.

Thanks for suggesting these changes!