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feat: log aggregation — Loki/Elasticsearch shipping with documented label schema - #10
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…ed label schema - Add Loki + Promtail services to docker-compose.observability.yml so `make obs-up` starts the full observability stack (Prometheus, Grafana, Loki, Promtail) in one command - observability/loki-config.yml: single-node filesystem storage (v13 schema) - observability/promtail-config.yml: Docker SD, compose-project filter, JSON pipeline stage; promotes level + logger to stream labels; maps request_id / workspace_id / user_id to structured metadata - observability/grafana/provisioning/datasources/loki.yml: Loki datasource auto-provisioned alongside Prometheus - backend/app/observability.py: optional _LokiHandler and _ElasticsearchHandler — batched background-thread push for environments without a sidecar agent; activated by LOKI_URL / ELASTICSEARCH_URL env vars - backend/app/config.py: loki_url, elasticsearch_url, log_service_name settings - backend/app/main.py: wire configure_log_shippers() on startup - backend/app/worker/celery_app.py: wire configure_log_shippers() via worker_process_init signal so the Celery worker ships logs independently - docs/log-aggregation.md: label schema reference, LogQL query examples, env var table, Promtail project filter instructions
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Summary
make obs-upnow starts Prometheus, Grafana, Loki, and Promtail together. Promtail scrapes Docker container stdout/stderr using Docker service discovery, filtered to theautoflowopscompose project, and ships streams to Loki. The pipeline extractslevelandloggeras stream labels;request_id,workspace_id, anduser_idas structured metadata.LOKI_URLorELASTICSEARCH_URLto activate background-thread handlers (_LokiHandler,_ElasticsearchHandler) that batch and push log entries directly from the backend and Celery worker processes — no sidecar required.docs/log-aggregation.mdwith stream labels, structured metadata fields, example LogQL queries, and env var reference.Files changed
docker-compose.observability.ymlloki_datavolumeobservability/loki-config.ymlobservability/promtail-config.ymlobservability/grafana/provisioning/datasources/loki.ymlbackend/app/observability.py_LokiHandler,_ElasticsearchHandler,configure_log_shippers()backend/app/config.pyloki_url,elasticsearch_url,log_service_namebackend/app/main.pyconfigure_log_shippers()on startupbackend/app/worker/celery_app.pyworker_process_initsignaldocs/log-aggregation.mdTest plan
make obs-upstarts cleanly; Grafana at http://localhost:3001 shows both Prometheus and Loki datasources{app="autoflowops"}LOKI_URL=http://loki:3100, backend logs are shipped directly (check Loki API:curl http://localhost:3100/loki/api/v1/labels)LOKI_URLandELASTICSEARCH_URLboth unset, no handlers are added (default behaviour unchanged)