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Container Diagram: Familienarchiv Container Diagram: Familienarchiv Familienarchiv (Docker Compose) [system] Observability Stack (docker-compose.observability.yml) [system] «container» Web Frontend [SvelteKit / Node adapter / port 3000] Server-side rendered UI. Handles auth session cookies, document search and viewer, transcription editor, annotation layer, family tree (Stammbaum), stories (Geschichten), activity feed (Chronik), enrichment workflow, and admin panel. «container» API Backend [Spring Boot 4 / Java 21 / Jetty / port 8080] REST API. Implements document management, search, user auth, file upload/download, transcription, OCR orchestration, and SSE notifications. Trusts X-Forwarded-* headers from Caddy. «container» OCR Service [Python FastAPI / port 8000] Handwritten text recognition (HTR) and OCR microservice. Single-node by design — see ADR-001. Reachable only on the internal Docker network; no external port exposed. «container» Relational Database [PostgreSQL 16] Stores document metadata, persons, users, permission groups, tags, transcription blocks, audit log, and Spring Session data. «container» Object Storage [MinIO (S3-compatible)] Stores the actual document files (PDFs, scans). Backend uses a bucket-scoped service account (archiv-app), not MinIO root. «container» Bucket / Service-Account Init [MinIO Client (mc)] One-shot container on startup. Idempotent: creates the archive bucket, the archiv-app service account, and attaches the readwrite policy. «container» Prometheus [prom/prometheus:v3.4.0] Scrapes metrics from backend management port 8081 (/actuator/prometheus), node-exporter, and cAdvisor. Retention: 30 days. «container» Node Exporter [prom/node-exporter:v1.9.0] Host-level CPU, memory, disk, and network metrics. «container» cAdvisor [gcr.io/cadvisor/cadvisor:v0.52.1] Per-container resource metrics. «container» Loki [grafana/loki:3.4.2] Stores log streams from all containers. «container» Promtail [grafana/promtail:3.4.2] Ships Docker container logs to Loki via Docker SD. «container» Tempo [grafana/tempo:2.7.2] Distributed trace storage. OTLP gRPC receiver on port 4317 (archiv-net). Grafana queries traces on port 3200 (obs-net). All ports internal only. «container» Grafana [grafana/grafana-oss:11.6.1] Unified observability UI — dashboards, logs, traces. Datasources (Prometheus, Loki, Tempo) and three dashboards are auto-provisioned. «container» GlitchTip [glitchtip/glitchtip:v4] Sentry-compatible error tracker. Receives frontend + backend error events, groups by fingerprint, provides issue UI with stack traces. «container» Redis [redis:7-alpine] Celery task queue for GlitchTip async workers. «person» User Admin or family member «external_system» Email Service SMTP server. Delivers notification and password-reset emails. «container» Reverse Proxy [Caddy 2 (host-installed)] TLS termination (auto Let's Encrypt). Routes /api/* to backend:8080, everything else to frontend:3000. Responds 404 on /actuator/* and adds HSTS, X-Content-Type-Options, Referrer-Policy headers. obs_glitchtip_worker HTTPS [TLS 1.2/1.3] Reverse proxies non-/api requests [HTTP / loopback:3000] Reverse proxies /api/ * [HTTP / loopback:8080] API requests with Basic Auth token [HTTP / REST / JSON] SSE notifications (server-sent events) [HTTP / SSE — fronted by Caddy] Reads and writes metadata and sessions [JDBC / SQL] Uploads and streams document files using archiv-app service account [HTTP / S3 API (AWS SDK v2)] OCR job requests with presigned MinIO URL [HTTP / REST / JSON] Sends notification and password-reset emails (optional) [SMTP] Fetches PDF via presigned URL [HTTP / S3 presigned] Bootstraps bucket + service account on startup [MinIO Client CLI] Pushes log streams [HTTP/Loki push API] Sends distributed traces via OTLP [gRPC / OTLP / port 4317 (archiv-net)] Queries metrics [HTTP 9090] Queries logs [HTTP 3100] Queries traces [HTTP 3200] Stores error events in glitchtip DB [PostgreSQL / archiv-net] Processes Celery tasks [Redis / obs-net]
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