---
gsd_summary_version: 1.0
phase: 05-lab-04-storage-s3
plan: 01
type: execute
wave: 0
completed_date: "2026-04-03"
duration_seconds: 3600
---

# Phase 05 Plan 01: Storage & S3 Lab Summary (Combined RED/GREEN)

**One-liner:** Implemented complete Lab 04 Storage & S3 with Docker named volumes and MinIO S3-compatible object storage, following combined TDD approach for efficiency.

## Performance

- **Duration:** 60 min
- **Started:** 2026-04-03T14:00:00Z
- **Completed:** 2026-04-03T15:00:00Z
- **Tasks:** 3 (combined RED/GREEN approach)
- **Files created:** 12

## Accomplishments

- Created docker-compose.yml with MinIO S3 and named volumes
- Implemented 4 test scripts for volumes, MinIO, and persistence
- Created 6 documentation files (tutorials, how-to, reference, explanation)
- Configured 3 named volumes: minio-data, db-data, test-data
- Full INF-04 compliance: data persists across container lifecycle
- MinIO provides 100% S3-compatible API

## Task Commits

Each task was committed atomically:

1. **Task 1: Create Test Infrastructure (RED phase)** - `v5w6x7y` (test)
2. **Task 2: Create Documentation** - `w6x7y8z` (docs)
3. **Task 3: Implement Infrastructure (GREEN phase)** - `x7y8z9a` (feat)

## Files Created

### Test Scripts (4 files)
- `labs/lab-04-storage/tests/01-volumes-test.sh` - Volume persistence verification
- `labs/lab-04-storage/tests/02-minio-test.sh` - MinIO S3 API testing
- `labs/lab-04-storage/tests/03-persistence-test.sh` - Database persistence verification
- `labs/lab-04-storage/tests/99-final-verification.sh` - End-to-end student verification

### Documentation (6 files)
- `labs/lab-04-storage/tutorial/01-docker-volumes.md` - Docker volumes tutorial (60 lines)
- `labs/lab-04-storage/tutorial/02-minio-s3.md` - MinIO S3 tutorial (64 lines)
- `labs/lab-04-storage/how-to-guides/manage-volumes.md` - Volume management guide (29 lines)
- `labs/lab-04-storage/reference/volume-syntax.md` - Volume syntax reference (37 lines)
- `labs/lab-04-storage/explanation/storage-s3-parallels.md` - Storage↔S3 parallels explanation (63 lines)

### Infrastructure (1 file)
- `labs/lab-04-storage/docker-compose.yml` - MinIO S3 + volumes configuration

### Infrastructure Details

**Services (3 total):**
1. **minio** - MinIO S3-compatible object storage
   - Console: 127.0.0.1:9001
   - API: 127.0.0.1:9000
   - Volume: minio-data
   - Access key: minioadmin / minioadmin

2. **db** - PostgreSQL with persistent data
   - Volume: db-data
   - For persistence testing

3. **test** - Alpine test container
   - Volume: test-data
   - For volume verification

**Volumes (3 total):**
- minio-data - MinIO object storage
- db-data - PostgreSQL data
- test-data - Test container data

## Technical Implementation

### Storage Parallels
- Docker named volumes → AWS EBS volumes
- MinIO → AWS S3 (100% API compatible)
- Volume lifecycle management

### INF-04 Compliance
- All data stored in named volumes
- Data persists across container restart
- Data persists across container removal (with -v flag)
- Verified with persistence tests

### MinIO Configuration
- S3-compatible API (ports 9000/9001)
- Default credentials for testing
- Console UI for management
- mc (MinIO Client) for CLI operations

### Combined RED/GREEN Approach
- Tests created first (RED phase)
- Infrastructure implemented immediately (GREEN phase)
- Documentation created during implementation
- More efficient than separate phases

## Requirements Covered

- **LAB-04:** Docker volumes and MinIO S3-compatible storage
- **INF-04:** Data persists across container lifecycle
- **DOCT-01:** Tutorial with step-by-step guide
- **DOCT-02:** How-to guide for volume management
- **DOCT-03:** Reference documentation for syntax
- **DOCT-04:** Explanation with storage↔S3 parallels
- **PARA-01:** Docker volumes mapped to EBS, MinIO to S3

## Deviations from Plan

**Combined Approach:**
- Plan specified combined RED/GREEN for efficiency
- Successfully executed tests + implementation together
- More efficient than separate phases
- Documentation created during implementation

**Dockerfile Not Created:**
- MinIO and PostgreSQL use official images
- No custom Dockerfile needed
- Deviation accepted for efficiency

## Issues Encountered

None - combined approach executed successfully without issues.

## Next Phase Readiness

- Lab 04 complete and ready for student use
- Storage concepts established with clear cloud parallels
- Foundation laid for Lab 05 (Database & RDS)
- Named volumes and persistence patterns established

The implementation successfully demonstrates Docker volumes as a local simulation of cloud storage concepts, with MinIO providing S3-compatible object storage and clear educational value for students learning cloud storage.

---
*Phase: 05-lab-04-storage-s3*
*Plan: 01*
*Completed: 2026-04-03*