https://12factor.net/ru/
Understanding your Symfony app with Prometheus:
https://blog.4xxi.com/understanding-your-symfony-app-with-prometheus-fdb4b0124d99
Сбор и анализ логов с Fluentd:
https://habr.com/ru/company/selectel/blog/250969/
О сборке метриков:
https://www.youtube.com/watch?v=RPK5fp9-4yI
Fluentd
https://mcs.mail.ru/help/ru_RU/cases-logs/case-swarm
Fluentd docker
https://docs.docker.com/config/containers/logging/fluentd/