🐛 Activate tracing in aiohttp-based services

[pcrespov]

What do these changes do?

Reviews and upgrades tracing helpers in aiohttp-based services, namely webserver, storage and director

• ♻️ improves servicelib.tracing.setup_tracing
  • Implemented sync to enforce order of middlewares
  • web-server has still old settings. Needs TRACING_ENABLED=1 (will be refactored as soon as we have new settings in place)
  • storage has new settings and can be configured using Settings.STORAGE_TRACING
• ♻️ servicelib.aiohttp.rest_middlewares doc and annotated
• ⬆️ upgrades client to the latest releaseaiozipkin==1.1.0 : could not be done due to a bug in library. Issue replicated in test packages/service-library/tests/aiohttp/test_tracing.py

[codecov]

Codecov Report

Merging #2559 (f035a25) into master (71579eb) will increase coverage by 1.1%.
The diff coverage is 83.9%.

@@           Coverage Diff            @@
##           master   #2559     +/-   ##
========================================
+ Coverage    77.2%   78.3%   +1.1%     
========================================
  Files         618     582     -36     
  Lines       23910   22934    -976     
  Branches     2356    2246    -110     
========================================
- Hits        18472   17972    -500     
+ Misses       4810    4333    -477     
- Partials      628     629      +1     

Flag	Coverage Δ
integrationtests	65.8% <68.9%> (-0.1%)	⬇️
unittests	72.6% <83.9%> (+0.8%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...storage/src/simcore_service_storage/application.py	44.1% <0.0%> (ø)
...ervices/storage/src/simcore_service_storage/cli.py	47.8% <28.5%> (-11.0%)	⬇️
.../simcore_service_webserver/diagnostics_handlers.py	55.2% <40.0%> (+0.6%)	⬆️
...library/src/servicelib/aiohttp/rest_middlewares.py	64.4% <78.2%> (+2.2%)	⬆️
...ibrary/src/servicelib/aiohttp/application_setup.py	81.9% <100.0%> (ø)
...e-library/src/servicelib/aiohttp/rest_responses.py	84.2% <100.0%> (+0.2%)	⬆️
.../service-library/src/servicelib/aiohttp/tracing.py	100.0% <100.0%> (+100.0%)	⬆️
...library/src/servicelib/aiohttp/typing_extension.py	100.0% <100.0%> (ø)
...ices/director/src/simcore_service_director/main.py	88.2% <100.0%> (-3.8%)	⬇️
...es/storage/src/simcore_service_storage/settings.py	100.0% <100.0%> (ø)
... and 56 more

[GitHK]

Nice. Please find a few questions below.

[sanderegg]

👍