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Luca Sacchi Ricciardi a021fe796b feat(lab-04): complete Phase 5 - Storage & S3 lab

Phase Plan:
- 05-PLAN.md: Combined execution plan for efficiency
- 05-RESEARCH.md: Domain research on volumes and MinIO

Test Scripts (4):
- 01-volumes-test.sh: Volume persistence verification
- 02-minio-test.sh: MinIO S3 API testing
- 03-persistence-test.sh: Database persistence verification
- 99-final-verification.sh: End-to-end verification

Documentation (6 files):
Tutorial: Docker volumes, MinIO S3
How-to: Manage volumes
Reference: Volume syntax
Explanation: Storage↔S3 parallels

Infrastructure:
- docker-compose.yml: MinIO S3 + PostgreSQL + test container
- Named volumes: minio-data, db-data, test-data (INF-04 compliant)

Key concepts:
- Named volumes = EBS volumes
- MinIO = S3 bucket (100% API compatible)
- Data persistence across container lifecycle

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-04-03 15:25:46 +02:00

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Explanation: Parallelismi Storage Docker ↔ AWS

Core Concepts

Docker Named Volume = EBS Volume

Aspect	Docker	AWS EBS
Creation	docker volume create	aws ec2 create-volume
Lifecycle	Indipendent dal container	Indipendente dall'istanza
Persistence	Sopravvive a docker rm	Sopravvive a ec2 terminate
Mount	volumes: section in compose	Attach to /dev/sdX
Backup	docker run --rm tar	EBS snapshots

MinIO = S3

Aspect	MinIO	AWS S3
API	100% S3 compatible	Native S3
Endpoint	http://localhost:9000	https://s3.amazonaws.com
Pricing	Free (self-hosted)	Pay-per-use
Use case	Local dev/test	Production

Storage Architecture Patterns

Database with Persistent Storage

Locale:

db:
  image: postgres
  volumes:
    - db-data:/var/lib/postgresql/data

Cloud: RDS con EBS storage

Object Storage

Locale:

minio:
  image: minio/minio
  volumes:
    - minio-data:/data

Cloud: S3 bucket

Key Differences

Scope: Volumes = single host, EBS = AZ-wide
Performance: Local filesystem vs network storage
Backup: tar vs EBS snapshots
Scaling: Manual vs S3 infinite scale

When to Use What

Use Case	Locale	Cloud
Dev database	PostgreSQL + Volume	RDS
File storage	Volume	EFS
Objects	MinIO	S3
Backup	tar to host	S3 Glacier

Conclusion

Docker volumes e MinIO seguono gli stessi principi di EBS e S3, permettendoti di praticare localmente prima di deployare in cloud.

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