Update Python version to 3.10 and use slim image

[magneticflux-]

Closes #372

Signed-off-by: Mitchell Skaggs skaggsm333@gmail.com

[codecov]

Codecov Report

Merging #373 (041f9a5) into master (6f96889) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #373   +/-   ##
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  Coverage   83.87%   83.87%           
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  Files          13       13           
  Lines        1054     1054           
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  Hits          884      884           
  Misses        170      170           

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[aparcar]

Thanks, problem is that current worker images are using the official openwrt/imagebuilder container which uses an old Python version. Using a newer Python version comes with a different Pickle version which is used to communicate by rq.

I think there is an option for rq to explicitly use the "old" pickle format, could you please check that out?

build@7074cb0a47da:~/openwrt$ python3
Python 3.7.3 (default, Jan 22 2021, 20:04:44) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

[magneticflux-]

Unfortunately there is no such option for clients of RQ without patching it ourselves: rq/rq#1168

I could make a PR on Gitlab here to update from Buster to Bullseye (Debian 10 to 11): https://gitlab.com/openwrt/docker/-/blob/master/Dockerfile.base#L1. Buster's default Python3 is 3.7, but Bullseye's default is 3.9. However, this also updates GCC from 8.3 to 10.2.

[aparcar]

I created a PR to upgrade the ImageBuilders, let's see if it works. If that's not an option we could also switch to the JSON serializer, however I'm not sure if that slows down things.

[aparcar]

I updated the imagebuilder container, this should work now.