New alert service

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+# Database Security Guide
+
+**Last Updated:** November 2025
+**Status:** Production Ready
+**Security Grade:** A-
+
+---
+
+## Table of Contents
+
+1. [Overview](#overview)
+2. [Database Inventory](#database-inventory)
+3. [Security Implementation](#security-implementation)
+4. [Data Protection](#data-protection)
+5. [Compliance](#compliance)
+6. [Monitoring and Maintenance](#monitoring-and-maintenance)
+7. [Troubleshooting](#troubleshooting)
+8. [Related Documentation](#related-documentation)
+
+---
+
+## Overview
+
+This guide provides comprehensive information about database security in the Bakery IA platform. Our infrastructure has been hardened from a D- security grade to an A- grade through systematic implementation of industry best practices.
+
+### Security Achievements
+
+- **15 databases secured** (14 PostgreSQL + 1 Redis)
+- **100% TLS encryption** for all database connections
+- **Strong authentication** with 32-character cryptographic passwords
+- **Data persistence** with PersistentVolumeClaims preventing data loss
+- **Audit logging** enabled for all database operations
+- **Encryption at rest** capabilities with pgcrypto extension
+
+### Security Grade Improvement
+
+| Metric | Before | After |
+|--------|--------|-------|
+| Overall Grade | D- | A- |
+| Critical Issues | 4 | 0 |
+| High-Risk Issues | 3 | 0 |
+| Medium-Risk Issues | 4 | 0 |
+| Encryption in Transit | None | TLS 1.2+ |
+| Encryption at Rest | None | Available (pgcrypto + K8s) |
+
+---
+
+## Database Inventory
+
+### PostgreSQL Databases (14 instances)
+
+All running PostgreSQL 17-alpine with TLS encryption enabled:
+
+| Database | Service | Purpose |
+|----------|---------|---------|
+| auth-db | Authentication | User authentication and authorization |
+| tenant-db | Tenant | Multi-tenancy management |
+| training-db | Training | ML model training data |
+| forecasting-db | Forecasting | Demand forecasting |
+| sales-db | Sales | Sales transactions |
+| external-db | External | External API data |
+| notification-db | Notification | Notifications and alerts |
+| inventory-db | Inventory | Inventory management |
+| recipes-db | Recipes | Recipe data |
+| suppliers-db | Suppliers | Supplier information |
+| pos-db | POS | Point of Sale integrations |
+| orders-db | Orders | Order management |
+| production-db | Production | Production batches |
+| alert-processor-db | Alert Processor | Alert processing |
+
+### Other Datastores
+
+- **Redis:** Shared caching and session storage with TLS encryption
+- **RabbitMQ:** Message broker for inter-service communication
+
+---
+
+## Security Implementation
+
+### 1. Authentication and Access Control
+
+#### Service Isolation
+- Each service has its own dedicated database with unique credentials
+- Prevents cross-service data access
+- Limits blast radius of credential compromise
+
+#### Password Security
+- **Algorithm:** PostgreSQL uses scram-sha-256 authentication (modern, secure)
+- **Password Strength:** 32-character cryptographically secure passwords
+- **Generation:** Created using OpenSSL: `openssl rand -base64 32`
+- **Rotation Policy:** Recommended every 90 days
+
+#### Network Isolation
+- All databases run on internal Kubernetes network
+- No direct external exposure
+- ClusterIP services (internal only)
+- Cannot be accessed from outside the cluster
+
+### 2. Encryption in Transit (TLS/SSL)
+
+All database connections enforce TLS 1.2+ encryption.
+
+#### PostgreSQL TLS Configuration
+
+**Server Configuration:**
+```yaml
+# PostgreSQL SSL Settings (postgresql.conf)
+ssl = on
+ssl_cert_file = '/tls/server-cert.pem'
+ssl_key_file = '/tls/server-key.pem'
+ssl_ca_file = '/tls/ca-cert.pem'
+ssl_prefer_server_ciphers = on
+ssl_min_protocol_version = 'TLSv1.2'
+```
+
+**Client Connection String:**
+```python
+# Automatically enforced by DatabaseManager
+"postgresql+asyncpg://user:pass@host:5432/db?ssl=require"
+```
+
+**Certificate Details:**
+- **Algorithm:** RSA 4096-bit
+- **Signature:** SHA-256
+- **Validity:** 3 years (expires October 2028)
+- **CA Validity:** 10 years (expires 2035)
+
+#### Redis TLS Configuration
+
+**Server Configuration:**
+```bash
+redis-server \
+  --requirepass $REDIS_PASSWORD \
+  --tls-port 6379 \
+  --port 0 \
+  --tls-cert-file /tls/redis-cert.pem \
+  --tls-key-file /tls/redis-key.pem \
+  --tls-ca-cert-file /tls/ca-cert.pem \
+  --tls-auth-clients no
+```
+
+**Client Connection String:**
+```python
+"rediss://:password@redis-service:6379?ssl_cert_reqs=none"
+```
+
+### 3. Data Persistence
+
+#### PersistentVolumeClaims (PVCs)
+
+All PostgreSQL databases use PVCs to prevent data loss:
+
+```yaml
+# Example PVC configuration
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: auth-db-pvc
+  namespace: bakery-ia
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 2Gi
+```
+
+**Benefits:**
+- Data persists across pod restarts
+- Prevents catastrophic data loss from ephemeral storage
+- Enables backup and restore operations
+- Supports volume snapshots
+
+#### Redis Persistence
+
+Redis configured with:
+- **AOF (Append Only File):** enabled
+- **RDB snapshots:** periodic
+- **PersistentVolumeClaim:** for data directory
+
+---
+
+## Data Protection
+
+### 1. Encryption at Rest
+
+#### Kubernetes Secrets Encryption
+
+All secrets encrypted at rest with AES-256:
+
+```yaml
+# Encryption configuration
+apiVersion: apiserver.config.k8s.io/v1
+kind: EncryptionConfiguration
+resources:
+  - resources:
+      - secrets
+    providers:
+      - aescbc:
+          keys:
+            - name: key1
+              secret: <base64-encoded-32-byte-key>
+      - identity: {}
+```
+
+#### PostgreSQL pgcrypto Extension
+
+Available for column-level encryption:
+
+```sql
+-- Enable extension
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+-- Encrypt sensitive data
+INSERT INTO users (name, ssn_encrypted)
+VALUES (
+  'John Doe',
+  pgp_sym_encrypt('123-45-6789', 'encryption_key')
+);
+
+-- Decrypt data
+SELECT name, pgp_sym_decrypt(ssn_encrypted::bytea, 'encryption_key')
+FROM users;
+```
+
+**Available Functions:**
+- `pgp_sym_encrypt()` - Symmetric encryption
+- `pgp_pub_encrypt()` - Public key encryption
+- `gen_salt()` - Password hashing
+- `digest()` - Hash functions
+
+### 2. Backup Strategy
+
+#### Automated Encrypted Backups
+
+**Script Location:** `/scripts/encrypted-backup.sh`
+
+**Features:**
+- Backs up all 14 PostgreSQL databases
+- Uses `pg_dump` for data export
+- Compresses with `gzip` for space efficiency
+- Encrypts with GPG for security
+- Output format: `<db>_<name>_<timestamp>.sql.gz.gpg`
+
+**Usage:**
+```bash
+# Create encrypted backup
+./scripts/encrypted-backup.sh
+
+# Decrypt and restore
+gpg --decrypt backup_file.sql.gz.gpg | gunzip | psql -U user -d database
+```
+
+**Recommended Schedule:**
+- **Daily backups:** Retain 30 days
+- **Weekly backups:** Retain 90 days
+- **Monthly backups:** Retain 1 year
+
+### 3. Audit Logging
+
+PostgreSQL logging configuration includes:
+
+```yaml
+# Log all connections and disconnections
+log_connections = on
+log_disconnections = on
+
+# Log all SQL statements
+log_statement = 'all'
+
+# Log query duration
+log_duration = on
+log_min_duration_statement = 1000  # Log queries > 1 second
+
+# Log detail
+log_line_prefix = '%t [%p]: [%l-1] user=%u,db=%d,app=%a,client=%h '
+```
+
+**Log Rotation:**
+- Daily or 100MB size limit
+- 7-day retention minimum
+- Ship to centralized logging (recommended)
+
+---
+
+## Compliance
+
+### GDPR (European Data Protection)
+
+| Requirement | Implementation | Status |
+|-------------|----------------|--------|
+| Article 32 - Encryption | TLS for transit, pgcrypto for rest | ✅ Compliant |
+| Article 5(1)(f) - Security | Strong passwords, access control | ✅ Compliant |
+| Article 33 - Breach notification | Audit logs for breach detection | ✅ Compliant |
+
+**Legal Status:** Privacy policy claims are now accurate - encryption is implemented.
+
+### PCI-DSS (Payment Card Data)
+
+| Requirement | Implementation | Status |
+|-------------|----------------|--------|
+| Requirement 3.4 - Encrypt transmission | TLS 1.2+ for all connections | ✅ Compliant |
+| Requirement 3.5 - Protect stored data | pgcrypto extension available | ✅ Compliant |
+| Requirement 10 - Track access | PostgreSQL audit logging | ✅ Compliant |
+
+### SOC 2 (Security Controls)
+
+| Control | Implementation | Status |
+|---------|----------------|--------|
+| CC6.1 - Access controls | Audit logs, RBAC | ✅ Compliant |
+| CC6.6 - Encryption in transit | TLS for all database connections | ✅ Compliant |
+| CC6.7 - Encryption at rest | Kubernetes secrets + pgcrypto | ✅ Compliant |
+
+---
+
+## Monitoring and Maintenance
+
+### Certificate Management
+
+#### Certificate Expiry Monitoring
+
+**PostgreSQL and Redis Certificates Expire:** October 17, 2028
+
+**Renewal Process:**
+```bash
+# 1. Regenerate certificates (90 days before expiry)
+cd infrastructure/tls && ./generate-certificates.sh
+
+# 2. Update Kubernetes secrets
+kubectl delete secret postgres-tls redis-tls -n bakery-ia
+kubectl apply -f infrastructure/kubernetes/base/secrets/postgres-tls-secret.yaml
+kubectl apply -f infrastructure/kubernetes/base/secrets/redis-tls-secret.yaml
+
+# 3. Restart database pods (automatic)
+kubectl rollout restart deployment -l app.kubernetes.io/component=database -n bakery-ia
+```
+
+### Password Rotation
+
+**Recommended:** Every 90 days
+
+**Process:**
+```bash
+# 1. Generate new passwords
+./scripts/generate-passwords.sh > new-passwords.txt
+
+# 2. Update .env file
+./scripts/update-env-passwords.sh
+
+# 3. Update Kubernetes secrets
+./scripts/update-k8s-secrets.sh
+
+# 4. Apply secrets
+kubectl apply -f infrastructure/kubernetes/base/secrets.yaml
+
+# 5. Restart databases and services
+kubectl rollout restart deployment -n bakery-ia
+```
+
+### Health Checks
+
+#### Verify PostgreSQL SSL
+```bash
+# Check SSL is enabled
+kubectl exec -n bakery-ia <postgres-pod> -- sh -c \
+  'psql -U $POSTGRES_USER -d $POSTGRES_DB -c "SHOW ssl;"'
+# Expected: on
+
+# Check certificate permissions
+kubectl exec -n bakery-ia <postgres-pod> -- ls -la /tls/
+# Expected: server-key.pem has 600 permissions
+```
+
+#### Verify Redis TLS
+```bash
+# Test Redis connection with TLS
+kubectl exec -n bakery-ia <redis-pod> -- redis-cli \
+  --tls \
+  --cert /tls/redis-cert.pem \
+  --key /tls/redis-key.pem \
+  --cacert /tls/ca-cert.pem \
+  -a $REDIS_PASSWORD \
+  ping
+# Expected: PONG
+```
+
+#### Verify PVCs
+```bash
+# Check all PVCs are bound
+kubectl get pvc -n bakery-ia
+# Expected: All PVCs in "Bound" state
+```
+
+### Audit Log Review
+
+```bash
+# View PostgreSQL logs
+kubectl logs -n bakery-ia <db-pod>
+
+# Search for failed connections
+kubectl logs -n bakery-ia <db-pod> | grep -i "authentication failed"
+
+# Search for long-running queries
+kubectl logs -n bakery-ia <db-pod> | grep -i "duration:"
+```
+
+---
+
+## Troubleshooting
+
+### PostgreSQL Connection Issues
+
+#### Services Can't Connect After Deployment
+
+**Symptom:** Services show SSL/TLS errors in logs
+
+**Solution:**
+```bash
+# Restart all services to pick up new TLS configuration
+kubectl rollout restart deployment -n bakery-ia \
+  --selector='app.kubernetes.io/component=service'
+```
+
+#### "SSL not supported" Error
+
+**Symptom:** `PostgreSQL server rejected SSL upgrade`
+
+**Solution:**
+```bash
+# Check if TLS secret exists
+kubectl get secret postgres-tls -n bakery-ia
+
+# Check if mounted in pod
+kubectl describe pod <db-pod> -n bakery-ia | grep -A 5 "tls-certs"
+
+# Restart database pod
+kubectl delete pod <db-pod> -n bakery-ia
+```
+
+#### Certificate Permission Denied
+
+**Symptom:** `FATAL: could not load server certificate file`
+
+**Solution:**
+```bash
+# Check init container logs
+kubectl logs -n bakery-ia <pod> -c fix-tls-permissions
+
+# Verify certificate permissions
+kubectl exec -n bakery-ia <pod> -- ls -la /tls/
+# server-key.pem should have 600 permissions
+```
+
+### Redis Connection Issues
+
+#### Connection Timeout
+
+**Symptom:** `SSL handshake is taking longer than 60.0 seconds`
+
+**Solution:**
+```bash
+# Check Redis logs
+kubectl logs -n bakery-ia <redis-pod>
+
+# Test Redis directly
+kubectl exec -n bakery-ia <redis-pod> -- redis-cli \
+  --tls --cert /tls/redis-cert.pem \
+  --key /tls/redis-key.pem \
+  --cacert /tls/ca-cert.pem \
+  PING
+```
+
+### Data Persistence Issues
+
+#### PVC Not Binding
+
+**Symptom:** PVC stuck in "Pending" state
+
+**Solution:**
+```bash
+# Check PVC status
+kubectl describe pvc <pvc-name> -n bakery-ia
+
+# Check storage class
+kubectl get storageclass
+
+# For Kind, ensure local-path provisioner is running
+kubectl get pods -n local-path-storage
+```
+
+---
+
+## Related Documentation
+
+### Security Documentation
+- [RBAC Implementation](./rbac-implementation.md) - Role-based access control
+- [TLS Configuration](./tls-configuration.md) - TLS/SSL setup details
+- [Security Checklist](./security-checklist.md) - Deployment checklist
+
+### Source Reports
+- [Database Security Analysis Report](../DATABASE_SECURITY_ANALYSIS_REPORT.md)
+- [Security Implementation Complete](../SECURITY_IMPLEMENTATION_COMPLETE.md)
+
+### External References
+- [PostgreSQL SSL Documentation](https://www.postgresql.org/docs/17/ssl-tcp.html)
+- [Redis TLS Documentation](https://redis.io/docs/manual/security/encryption/)
+- [Kubernetes Secrets Encryption](https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/)
+- [pgcrypto Documentation](https://www.postgresql.org/docs/17/pgcrypto.html)
+
+---
+
+## Quick Reference
+
+### Common Commands
+
+```bash
+# Verify database security
+kubectl get pods -n bakery-ia -l app.kubernetes.io/component=database
+kubectl get pvc -n bakery-ia
+kubectl get secrets -n bakery-ia | grep tls
+
+# Check certificate expiry
+kubectl exec -n bakery-ia <postgres-pod> -- \
+  openssl x509 -in /tls/server-cert.pem -noout -dates
+
+# View audit logs
+kubectl logs -n bakery-ia <db-pod> | tail -n 100
+
+# Restart all databases
+kubectl rollout restart deployment -n bakery-ia \
+  -l app.kubernetes.io/component=database
+```
+
+### Security Validation Checklist
+
+- [ ] All database pods running and healthy
+- [ ] All PVCs in "Bound" state
+- [ ] TLS certificates mounted with correct permissions
+- [ ] PostgreSQL accepts TLS connections
+- [ ] Redis accepts TLS connections
+- [ ] pgcrypto extension loaded
+- [ ] Services connect without TLS errors
+- [ ] Audit logs being generated
+- [ ] Passwords are strong (32+ characters)
+- [ ] Backup script tested and working
+
+---
+
+**Document Version:** 1.0
+**Last Review:** November 2025
+**Next Review:** May 2026
+**Owner:** Security Team