✨ Maintenance: disable Traefik sticky connection and Socket.IO long polling 🚨

[sanderegg]

What do these changes do?

We are in 2022, websockets are available everywhere:

• no need for socket.io long polling feature
• therefore no need to continue with having sticky connection defined on traefik (this ensure one client always gets responses from the same webserver)

Removing connection stickyness means that all webserver instances can reply to a client, instead of only one, thus this should improve responsiveness.

Reference on socket.io: https://socket.io/docs/v4/using-multiple-nodes#enabling-sticky-session

This works because currently the webserver instances are all receiving the logs/progress through rabbitMQ (very innefficient, and will be one of the next changes, so keep the hope)

Related issue/s

How to test

1. connect to osparc with debugging tools open
2. check the websocket properly connected
3. use osparc as usual (run computational services, dynamic ones)
4. check P2P responsivity tests, there might be a slight increase in RPS

Checklist

[codecov]

Codecov Report

Merging #3686 (bd7501d) into master (2fae099) will increase coverage by 0.9%.
The diff coverage is n/a.

❗ Current head bd7501d differs from pull request most recent head 6041a7a. Consider uploading reports for the commit 6041a7a to get more accurate results

@@           Coverage Diff            @@
##           master   #3686     +/-   ##
========================================
+ Coverage    83.4%   84.3%   +0.9%     
========================================
  Files         883     848     -35     
  Lines       37398   35495   -1903     
  Branches      786     786             
========================================
- Hits        31197   29939   -1258     
+ Misses       5992    5347    -645     
  Partials      209     209             

Flag	Coverage Δ
integrationtests	67.8% <ø> (+15.0%)	⬆️
unittests	81.3% <ø> (-0.3%)	⬇️

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

Impacted Files	Coverage Δ
...ore_service_director_v2/utils/dask_client_utils.py	80.8% <0.0%> (-6.1%)	⬇️
..._dynamic_sidecar/modules/outputs/_event_handler.py
.../simcore_service_dynamic_sidecar/api/containers.py
...rc/simcore_service_dynamic_sidecar/api/_routing.py
...rvice_dynamic_sidecar/models/schemas/containers.py
...mcore_service_dynamic_sidecar/core/remote_debug.py
.../src/simcore_service_dynamic_sidecar/core/utils.py
.../src/simcore_service_dynamic_sidecar/api/health.py
...ervice_dynamic_sidecar/modules/outputs/__init__.py
...idecar/src/simcore_service_dynamic_sidecar/main.py
... and 50 more

[mrnicegyu11]

Please add a 🚨 icon so we remember to test this (and, if you know some, maybe give instructions for checking this works)

Thanks a lot

[sanderegg]

Please add a rotating_light icon so we remember to test this (and, if you know some, maybe give instructions for checking this works)

Thanks a lot

@mrnicegyu11 : done

[odeimaiz]

Tested 👍

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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