Setup monitoring / logging for Open Food Facts services

[ocervell]

Goal: Improve current monitoring coverage for all Open Food Facts services (Robotoff, Product Opener, etc...) to get essential insights on how the stack is performing.

Tasks:

• [ ] Monitoring configs:
  • [ ] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/6
  • [ ] Request latency
  • [ ] Request count + http status code
  • [ ] Container metrics
  • [ ] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/7
  • [ ] Request latency
  • [ ] Request count + http status code
  • [ ] Container metrics
  • [ ] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/10
  • [ ] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/11
• [x] Instrumentation:
  • [x] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/5
  • [ ] https://github.com/openfoodfacts/openfoodfacts-monitoring/issues/8
  • [ ] https://github.com/openfoodfacts/openfoodfacts-server/pull/5787
  • [ ] Gunicorn / Falcon logs [Robotoff]
  • [x] https://github.com/openfoodfacts/openfoodfacts-server/pull/5747
  • [x] https://github.com/openfoodfacts/openfoodfacts-server/pull/5748
  • [x] https://github.com/openfoodfacts/robotoff/pull/457
  • [x] https://github.com/openfoodfacts/openfoodfacts-monitoring/pull/4
• [x] Monitoring stack:
  • [x] #59
  • [x] https://github.com/openfoodfacts/openfoodfacts-monitoring/pull/2
  • [x] https://github.com/openfoodfacts/openfoodfacts-monitoring/pull/13

[ocervell]

@teolemon @stephanegigandet @cquest for review