Adjust Prometheus plugin to the latest aioprometheus version 21.9.0

[giffels]

aioprometheus has changed its API so that metrics are automatically registered when they are created according to https://github.com/claws/aioprometheus/blob/master/CHANGELOG.md. With newer versions the unittest is failing, because the method to register new metrics does not exists anymore. This pull request changes the Prometheus plugin accordingly and enforces the installation of aioprometheus>=21.9.0.

[codecov-commenter]

Codecov Report

Merging #211 (e02885d) into master (9728248) will not change coverage.
The diff coverage is 100.00%.

❗ Current head e02885d differs from pull request most recent head 67ad26c. Consider uploading reports for the commit 67ad26c to get more accurate results

@@           Coverage Diff           @@
##           master     #211   +/-   ##
=======================================
  Coverage   99.55%   99.55%           
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  Files          42       42           
  Lines        1795     1795           
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  Hits         1787     1787           
  Misses          8        8           

Impacted Files	Coverage Δ
tardis/utilities/attributedict.py	100.00% <ø> (ø)
tardis/adapters/sites/cloudstack.py	100.00% <100.00%> (ø)
tardis/adapters/sites/htcondor.py	100.00% <100.00%> (ø)
tardis/adapters/sites/moab.py	100.00% <100.00%> (ø)
tardis/adapters/sites/openstack.py	100.00% <100.00%> (ø)
tardis/adapters/sites/slurm.py	100.00% <100.00%> (ø)
tardis/plugins/prometheusmonitoring.py	100.00% <100.00%> (ø)
tardis/resources/dronestates.py	99.32% <100.00%> (ø)
tardis/resources/poolfactory.py	100.00% <0.00%> (ø)

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[mschnepf]

Looks good to me. Thanks for that fix :-)

[maxfischer2781]

I did some digging through the aioprometheous source and judging by their older __init__.py the new imports should work down to v16.06.1 (there aren't any older tags available). Judging by the age of the initial PR (#142) I assume TARDIS works with aioprometheus>=19.10.0.

[giffels]

I did some digging through the aioprometheous source and judging by their older __init__.py the new imports should work down to v16.06.1 (there aren't any older tags available). Judging by the age of the initial PR (#142) I assume TARDIS works with aioprometheus>=19.10.0.

Yes, imports might work down to v16.06.1, but the API changes (automated registering of metrics) have been introduced in 21.9.0 according to the changelog and the commit. So, with earlier versions the changes will not work.

[maxfischer2781]

Thanks a lot for checking the version dependency! Go for it.