# Monitoring und Logging

> **Version:** 2.0  
> **Date:** 2026-08-20

## Health Endpoints

### `/health/live` — Liveness Probe

Prüft ob der Prozess lebt. Immer 200 wenn der API-Prozess läuft.

```bash
curl https://crm.media-on.de/health/live
# → {"status":"alive"}
```

Verwendung: Kubernetes/Coolify Restart-Entscheidung.

### `/health/ready` — Readiness Probe

Prüft ob die App bereit ist Requests zu bedienen:
- PostgreSQL Verbindung
- Redis Verbindung
- Storage Backend
- Worker Heartbeat (falls verfügbar)

```bash
curl https://crm.media-on.de/health/ready
# → {"status":"ready","checks":{"database":"ok","redis":"ok","storage":"ok"}}
```

Verwendung: Load Balancer Traffic-Routing. Bei `not_ready` → 503.

### `/api/v1/health` — Full Health

Vollständiger Health Check mit allen Details. Backward compatible.

```bash
curl https://crm.media-on.de/api/v1/health
# → {"status":"healthy","version":"1.0.0","checks":{...}}
```

---

## System Dashboard (Admin-only)

Das System Dashboard ist die zentrale Monitoring-Oberfläche für Administratoren.

- **URL:** `/system-dashboard` (Frontend, Admin-only)
- **API:** `GET /api/v1/system/dashboard` (Admin-only)
- **Alerts:** `GET /api/v1/system/alerts` (Admin-only)

### Dashboard-Inhalte

| Bereich | Metriken |
|---------|----------|
| **System Health** | Overall status (healthy/degraded/down) |
| **Database** | Connections, Table Count, DB Size (bytes/human) |
| **Redis** | Connected Clients, Used Memory, Peak Memory, Uptime |
| **Worker** | Queue Length, Active Workers, Status (up/degraded/down) |
| **API Stats** | Total Requests, Error Count, Error Rate, Avg Response Time |
| **Plugins** | Total Discovered, Active Plugins (name, version, is_core) |
| **Storage** | Disk Usage (total/used/free), File Count, Status |
| **Alert Feed** | System Messages aus Communication-System |

### Alert-Dispatch

Bei Problemen (DB down, Redis down, Worker down, High Error Rate) sendet das System Dashboard automatisch eine System-Message an das Communication-System (`post_system_message()`). Diese erscheint im Alert-Feed des Dashboards und in den Benachrichtigungen der Admins.

```bash
# Dashboard abfragen
curl -b "leocrm_session=<session>" https://crm.media-on.de/api/v1/system/dashboard | jq .

# Aktive Alerts abfragen
curl -b "leocrm_session=<session>" https://crm.media-on.de/api/v1/system/alerts | jq .
```

---

## Metrics Endpoint

### `/api/v1/metrics` — Prometheus Metrics

Prometheus-kompatible Metriken. Admin-only (403 für non-admin).

```bash
curl -H "Authorization: Bearer ..." https://crm.media-on.de/api/v1/metrics
```

Metriken:
- `leocrm_http_requests_total` — HTTP Request Counter
- `leocrm_http_request_duration_seconds` — Request Duration Histogram
- `leocrm_db_pool_size` — DB Connection Pool Size
- `leocrm_db_pool_checked_out` — Active DB Connections
- `leocrm_outbox_pending` — Pending Outbox Events
- `leocrm_outbox_failed` — Failed Outbox Events

---

## Alerting via Notification-System

LeoCRM nutzt das integrierte Notification-System für Alerting. Bei System-Problemen werden automatisch System-Messages an das Communication-System gesendet.

### Alert-Quellen

| Quelle | Trigger | Ziel |
|--------|---------|------|
| System Dashboard | DB/Redis/Worker down, High Error Rate | Communication-System (Alert Feed) |
| Backup Job | Backup fehlgeschlagen | Communication-System + Audit Log |
| ARQ Worker | Job fehlgeschlagen, Queue überlastet | Communication-System |
| Outbox | Delivery failed | Audit Log + Communication-System |

### Alert-Typen

| Alert | Bedingung | Severity |
|-------|-----------|----------|
| API Down | `/health/live` nicht erreichbar | Critical |
| API Not Ready | `/health/ready` = not_ready | Warning |
| DB Down | Health check database = down | Critical |
| Redis Down | Health check redis = down | Warning |
| High Error Rate | Fehlerrate > 5% | Warning |
| Slow Response | p95 > 2s | Warning |
| DB Pool Exhausted | Pool checked_out = pool_size | Critical |
| Outbox Backlog | Pending > 100 | Warning |
| Worker Down | Worker heartbeat fehlt | Critical |
| Backup Failed | Backup job returned error | Critical |
| Queue Overload | Queue length > 500 | Warning |

### Alert-Empfang

Alerts erscheinen:
1. Im System Dashboard Alert-Feed (`/system-dashboard`)
2. In den Benachrichtigungen der Admins (Notification-System)
3. Im Audit Log (für Backup/Worker/Outbox Alerts)

---

## Incident Response Runbook

Siehe `docs/incident-response-runbook.md` für detaillierte Notfall-Prozeduren.

### Schnell-Referenz

| Incident | Erste Maßnahme | escalation |
|----------|---------------|------------|
| **Server-Ausfall** | Coolify Restart → Health-Check → System-Message | Hetzner Support |
| **DB-Crash** | PostgreSQL Restart → Migration-Check → Backup-Restore | Coolify DB Restart |
| **Redis-Crash** | Redis Restart → Session-Check | Coolify Service Restart |
| **Security-Breach** | Logs prüfen → Password-Reset → Audit-Log Export | Incident Response Team |
| **Backup Failed** | Backup-Log prüfen → Manueller Retry → Storage prüfen | Admin |
| **Worker Down** | Worker-Container Restart → Queue prüfen | Coolify Service Restart |

### Incident Response Schritte

1. **Erkennen** — Alert im System Dashboard oder externes Monitoring
2. **Eingrenzen** — Health-Checks, Logs, Metrics prüfen
3. **Beheben** — Restart, Restore, Konfiguration anpassen
4. **Verifizieren** — Health-Check grün, System Dashboard ok
5. **Dokumentieren** — Audit Log Eintrag, Post-Mortem bei Critical

---

## Externes Monitoring

### Empfohlene Tools

- **Uptime Kuma** — Einfache Uptime-Überwachung
- **Prometheus + Grafana** — Full Metrics Dashboard
- **Sentry** — Error Tracking
- **Coolify Health Monitoring** — Eingebaut in Coolify

### Coolify Health Check Konfiguration

```yaml
health_check:
  type: http
  path: /health/ready
  port: 8000
  interval: 30
  timeout: 10
  retries: 3
  start_period: 15
```

### Uptime Kuma Setup

1. Monitor URL: `https://crm.media-on.de/health/live`
2. Expected Status: 200
3. Interval: 30s
4. Alert bei: 3 consecutive failures

### Prometheus Scrape Config

```yaml
scrape_configs:
  - job_name: 'leocrm'
    metrics_path: '/api/v1/metrics'
    static_configs:
      - targets: ['crm.media-on.de']
    authorization:
      type: Bearer
      credentials: '<admin-token>'
```

---

## Strukturiertes Logging

Alle API-Requests werden strukturiert geloggt:

```json
{
  "method": "POST",
  "path": "/api/v1/contacts",
  "status": 200,
  "duration_ms": 15.3,
  "tenant_id": "bfe4d09e-...",
  "event": "api_request",
  "level": "info",
  "timestamp": "2026-08-20T14:00:00Z"
}
```

Log-Level:
- `info` — Normale API-Requests
- `warning` — Langsame Requests, Permission denied
- `error` — 500er Fehler, Exceptions

### Error Tracking

```python
# app/core/monitoring.py
record_error(
    error_code="DB_CONNECTION_FAILED",
    message="Database connection lost",
    context={"host": "postgres", "port": 5432},
    trace_id="abc-123",
)
```

Fehler werden mit `trace_id` getrackt für Korrelation über Services hinweg.