🏗️ Docker-based Hyperledger Fabric: Structure Evaluation / Required Improvements

[apierr]

🏗️ Docker-based Hyperledger Fabric: Structure Evaluation

✅ Current Strengths

Aspect	Compliance	Rationale
Separation of Concerns	✅ SOLID (SRP)	Each directory has single, clear purpose
Docker Foundation	✅ Present	docker/ directory with logical organization
Reproducibility	✅ Good	Fixtures and automation included

⚠️ Required Improvements

🐳 Enhanced Docker Structure

docker/
├── images/
│   ├── fabric-peer/
│   ├── fabric-orderer/
│   └── base/                    # 🔄 DRY: Shared dependencies
├── compose/
│   ├── base/                    # 🔄 DRY: Reusable services
│   │   ├── peer-base.yaml
│   │   └── orderer-base.yaml
│   ├── networks/                # 🎯 KISS: 2/4/10/20 nodes
│   └── overlays/                # 🔓 SOLID: Crypto modes
│       ├── ecdsa-only.yaml
│       ├── pqc-only.yaml
│       └── hybrid.yaml
└── configs/

📦 Refactored Source

src/
├── chaincode/              # ✏️ Renamed from fabric/
├── pqc/
│   └── Dockerfile
├── sdk/
│   └── Dockerfile
└── fabric-patches/         # 🆕 Core modifications

🛠️ Essential Scripts

tools/scripts/
├── docker/
│   ├── network-up.sh        # 🎯 Single entry point
│   ├── network-down.sh
│   └── switch-crypto-mode.sh
├── fabric/
│   ├── generate-crypto.sh
│   └── deploy-chaincode.sh
└── utils/
    └── validate-config.sh

🌍 Environment Management

.env.example
env/
├── dev.env
├── test.env
└── benchmark.env

Example:

CRYPTO_MODE=hybrid          # ecdsa | pqc | hybrid
NETWORK_SIZE=4              # 2 | 4 | 10 | 20
PQC_ALGORITHM=dilithium3

📊 Gap Analysis

Component	Status	Priority
Base Docker configs	❌ Missing	🔴 High
Environment templates	❌ Missing	🔴 High
Reusable compose files	❌ Missing	🟡 Medium

✅ Implementation Checklist

• 🔴 Create base Dockerfiles with multi-stage builds (KISS)
• 🔴 Implement compose inheritance: base + overlays (DRY)
• 🔴 Add env/ directory with configuration templates
• 🟡 Rename src/fabric/ → src/chaincode/ (clarity)
• 🟡 Create tools/scripts/docker/network-up.sh entry point
• 🟡 Add .dockerignore files
• 🟢 Implement Docker health checks
• 🟢 Create smoke test script

🎯 Final Assessment

Readiness: 85%

🔴 Critical Gaps

1. No reusable base configurations (DRY violation)
2. Missing environment management
3. Ambiguous src/fabric/ naming

📈 Priority Actions

1. Refactor docker/compose/ → base + overlay pattern
2. Add env/ with templates
3. Create unified network-up.sh script
4. Rename src/fabric/ → src/chaincode/

Result: Principle-compliant, production-grade structure for PQC research.