majiayu000 Docker Log Debugger
Find and debug errors by examining Docker container logs.
Primary Command (Use This First!)
docker compose logs --since 15m | grep -iE -B 10 -A 10 "error|fail|exception"
Shows all errors from last 15 minutes with 10 lines of context before/after each match.
When to Use
Use proactively when:
- Tests fail
- API endpoints return errors
- Worker jobs don't process
- Database/Redis connection issues
- Any service misbehaves
Project Services
- api - FastAPI (webhooks, HTTP endpoints)
- worker - RQ worker (async jobs, enrichment, interventions)
- datastore - PostgreSQL with pgvector
- redis - Job queue
Common Commands
# View all services (last 5 min)
docker compose logs --since 5m
# View specific service
docker compose logs api --since 5m
docker compose logs worker --since 5m
# Follow logs in real-time
docker compose logs -f api worker
# View last N lines
docker compose logs --tail 100 worker
# Search for specific patterns
docker compose logs worker --since 5m | grep -i "KeyError"
docker compose logs api --since 5m | grep -i "connection"
docker compose logs worker --since 5m | grep -i "langfuse"
# Service health
docker compose ps
docker compose restart worker
Time Filters
Use with --since: 5m, 10m, 1h, 30s, 2h30m
Quick Debugging
Test Failed
docker compose logs --since 15m | grep -iE -B 10 -A 10 "error|fail|exception"
docker compose ps # Check if services are running
Worker Job Issues
docker compose logs worker --since 5m | grep -i "exception\|error"
docker compose logs worker --since 5m | grep -i "job\|enrich"
API Errors
docker compose logs api --since 5m | grep -E "(400|401|404|500|503)"
docker compose logs api --since 5m | grep -A 10 "Traceback"
Database/Redis Issues
docker compose logs datastore --since 5m
docker compose logs api worker --since 5m | grep -i "connection\|postgres\|redis"
Langfuse Errors
docker compose logs worker --since 5m | grep -i "langfuse\|prompt.*not found"
Common Error Patterns
| Error | Check |
|---|---|
KeyError: 'field' |
Fetch Langfuse prompt to see actual schema |
Connection refused |
docker compose ps - check service status |
ModuleNotFoundError |
May need docker compose build api worker |
Job not found |
Check Redis running, worker processing jobs |
OpenAI API error |
Verify OPENAI_API_KEY, check rate limits |
alembic errors |
Run migrations: docker compose exec api alembic upgrade head |
Quick Reference
# 🔥 Find all errors with context
docker compose logs --since 15m | grep -iE -B 10 -A 10 "error|fail|exception"
# Service status
docker compose ps
# Restart services
docker compose restart
# Full reset
docker compose down && docker compose up -d
# Watch live
docker compose logs -f api worker
# Save for analysis
docker compose logs --since 15m > debug.log