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Documentation (6 files, 1500+ lines): Tutorials (3): - 01-deploy-rds-database.md: Deploy PostgreSQL in private network - 02-data-persistence.md: Data persistence with named volumes - 03-security-compliance.md: INF-01/02/03/04 compliance How-to Guides (1): - connect-to-postgresql.md: Connection methods Reference (1): - postgresql-commands.md: PostgreSQL command reference Explanation (1): - database-rds-parallels.md: Docker↔RDS parallels with architecture diagrams Key concepts: - PostgreSQL container → RDS Instance - Private network → VPC Private Subnet - Named volume → EBS volume - Resource limits → DB instance class Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
158 lines
6.3 KiB
Markdown
158 lines
6.3 KiB
Markdown
# Explanation: Docker Database ↔ RDS Parallels
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## Architettura a Confronto
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```
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┌─────────────────────────────────────────────────────────────┐
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│ AWS Cloud Architecture │
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├─────────────────────────────────────────────────────────────┤
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│ │
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│ ┌───────────────┐ ┌──────────────────┐ │
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│ │ EC2 Instance │ │ RDS Instance │ │
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│ │ (Web/App) │────────▶│ PostgreSQL │ │
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│ │ │ VPC │ Private Subnet │ │
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│ └───────────────┘ └──────────────────┘ │
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│ │ │ │
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│ │ EBS Volume │
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│ Internet │ │
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│ ▼ │
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│ Persistent Data │
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└─────────────────────────────────────────────────────────────┘
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┌─────────────────────────────────────────────────────────────┐
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│ Local Docker Architecture │
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├─────────────────────────────────────────────────────────────┤
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│ │
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│ ┌───────────────┐ ┌──────────────────┐ │
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│ │ Container │ │ Container │ │
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│ │ (nginx) │────────▶│ PostgreSQL │ │
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│ │ lab05-app │ Bridge │ lab05-db │ │
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│ └───────────────┘ Network └──────────────────┘ │
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│ │ Private Network │
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│ Host │ │
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│ (127.0.0.1) │ │
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│ Named Volume │
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│ │ │
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│ ▼ │
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│ Persistent Data │
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└─────────────────────────────────────────────────────────────┘
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```
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## Mapping Componenti
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| Docker Locale | AWS Cloud | Spiegazione |
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|---------------|-----------|-------------|
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| PostgreSQL container | RDS Instance | Database gestito |
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| Private bridge network | VPC Private Subnet | Isolamento di rete |
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| Named volume | EBS volume | Persistenza dati |
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| Resource limits (cpus, memory) | DB instance class | Allocazione risorse |
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| docker-compose up | RDS create | Deploy command |
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| docker logs | CloudWatch logs | Logging e monitoring |
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| pg_isready | RDS health check | Verifica disponibilità |
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| Non-root user | IAM authentication | Controllo accessi |
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## Differenze Chiave
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### Gestione
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**RDS (AWS):**
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- Completamente managed
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- Patch automatiche
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- Backup automatici
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- Multi-AZ per HA
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- Scaling orizzontale Read Replicas
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**PostgreSQL Docker:**
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- Self-managed
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- Patch manuali
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- Backup manuali (pg_dump)
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- HA con repliche manuali
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- Read repliche configurate manualmente
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### Sicurezza
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**RDS:**
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- IAM authentication
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- Security groups VPC
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- Encryption at rest (KMS)
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- SSL/TLS obbligatorio
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- Audit logging
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**PostgreSQL Docker:**
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- Username/password
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- Bridge network isolation
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- Filesystem encryption (host)
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- TLS configurato manualmente
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- PostgreSQL logging
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### Costi
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**RDS:**
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- Costo orario instance
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- Costo storage GB/mese
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- Costo data transfer
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- Costo backup storage
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**PostgreSQL Docker:**
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- Costo VM host
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- Nessun costo aggiuntivo
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- Storage incluso
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- Nessun data transfer cost
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## Quando Usare Quale
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### Usa RDS quando:
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- Servizio production mission-critical
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- Requltiamo alta disponibilità (99.99%)
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- Hai bisogno di scaling automatico
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- Vuoi managed backups
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- Budget per costi cloud
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### Usa PostgreSQL Docker quando:
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- Sviluppo e testing
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- Ambienti di laboratorio
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- Proof of concept
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- Budget limitato
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- Requisiti di bassa complessità
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## Best Practices Comuni
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**Entrambi:**
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- Non esporre su internet
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- Usare backup regolari
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- Monitorare performance
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- Configurare resource limits
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- Usare connessioni SSL/TLS
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**RDS-specific:**
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- Abilita Multi-AZ per production
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- Configura retention backup
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- Usa Parameter Groups
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- Abilita Performance Insights
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**Docker-specific:**
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- Usa named volumes
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- Configura healthchecks
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- Limita risorse container
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- Monitora docker stats
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## Comandi Equivalenti
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| Operazione | Docker | RDS/AWS |
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|------------|--------|---------|
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| Deploy | docker-compose up | aws rds create-db-instance |
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| Stop | docker-compose stop | aws rds stop-db-instance |
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| Start | docker-compose start | aws rds start-db-instance |
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| Scale | docker-compose up --scale | aws rds modify-db-instance |
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| Status | docker ps | aws rds describe-db-instances |
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| Logs | docker logs | aws rds describe-db-log-files |
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| Backup | pg_dump | aws rds create-db-snapshot |
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| Restore | psql < backup.sql | aws rds restore-db-instance |
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## Percorso di Apprendimento
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1. **Inizia con Docker:** Impara concetti base PostgreSQL
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2. **Pratica con Docker:** Sperimenta in sicurezza locale
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3. **Passa a RDS:** Applica conoscenze al cloud
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4. **Approfondisci:** Managed services e ottimizzazione
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