smarts3/production-readiness.md

Production-Readiness Plan for smarts3

Goal: Make smarts3 production-ready as a MinIO alternative for use cases where:

• Running MinIO is out of scope
• You have a program written for S3 and want to use the local filesystem
• You need a lightweight, zero-dependency S3-compatible server

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🔍 Current State Analysis

✅ What's Working

• Native S3 server with zero framework dependencies
• Core S3 operations: PUT, GET, HEAD, DELETE (objects & buckets)
• List buckets and objects (V1 and V2 API)
• Object copy with metadata handling
• Range requests for partial downloads
• MD5 checksums and ETag support
• Custom metadata (x-amz-meta-*)
• Filesystem-backed storage with Windows compatibility
• S3-compatible XML error responses
• Middleware system and routing
• AWS SDK v3 compatibility (tested)

❌ Production Gaps Identified

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🎯 Critical Features (Required for Production)

1. Multipart Upload Support 🚀 HIGHEST PRIORITY

Why: Essential for uploading files >5MB efficiently. Without this, smarts3 can't handle real-world production workloads.

Implementation Required:

• POST /:bucket/:key?uploads - CreateMultipartUpload
• PUT /:bucket/:key?partNumber=X&uploadId=Y - UploadPart
• POST /:bucket/:key?uploadId=X - CompleteMultipartUpload
• DELETE /:bucket/:key?uploadId=X - AbortMultipartUpload
• GET /:bucket/:key?uploadId=X - ListParts
• Multipart state management (temp storage for parts)
• Part ETag tracking and validation
• Automatic cleanup of abandoned uploads

Files to Create/Modify:

• ts/controllers/multipart.controller.ts (new)
• ts/classes/filesystem-store.ts (add multipart methods)
• ts/classes/smarts3-server.ts (add multipart routes)

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2. Configurable Authentication 🔐

Why: Currently hardcoded credentials ('S3RVER'/'S3RVER'). Production needs custom credentials.

Implementation Required:

• Support custom access keys and secrets via configuration
• Implement AWS Signature V4 verification
• Support multiple credential pairs (IAM-like users)
• Optional: Disable authentication for local dev use

Configuration Example:

interface IAuthConfig {
  enabled: boolean;
  credentials: Array<{
    accessKeyId: string;
    secretAccessKey: string;
  }>;
  signatureVersion: 'v4' | 'none';
}

Files to Create/Modify:

• ts/classes/auth-middleware.ts (new)
• ts/classes/signature-validator.ts (new)
• ts/classes/smarts3-server.ts (integrate auth middleware)
• ts/index.ts (add auth config options)

---

3. CORS Support 🌐

Why: Required for browser-based uploads and modern web apps.

Implementation Required:

• Add CORS middleware
• Support preflight OPTIONS requests
• Configurable CORS origins, methods, headers
• Per-bucket CORS configuration (optional)

Configuration Example:

interface ICorsConfig {
  enabled: boolean;
  allowedOrigins: string[]; // ['*'] or ['https://example.com']
  allowedMethods: string[]; // ['GET', 'POST', 'PUT', 'DELETE']
  allowedHeaders: string[]; // ['*'] or specific headers
  exposedHeaders: string[]; // ['ETag', 'x-amz-*']
  maxAge: number; // 3600 (seconds)
  allowCredentials: boolean;
}

Files to Create/Modify:

• ts/classes/cors-middleware.ts (new)
• ts/classes/smarts3-server.ts (integrate CORS middleware)
• ts/index.ts (add CORS config options)

---

4. SSL/TLS Support 🔒

Why: Production systems require encrypted connections.

Implementation Required:

• HTTPS server option with cert/key configuration
• Auto-redirect HTTP to HTTPS (optional)
• Support for self-signed certs in dev mode

Configuration Example:

interface ISslConfig {
  enabled: boolean;
  cert: string; // Path to certificate file or cert content
  key: string; // Path to key file or key content
  ca?: string; // Optional CA cert
  redirectHttp?: boolean; // Redirect HTTP to HTTPS
}

Files to Create/Modify:

• ts/classes/smarts3-server.ts (add HTTPS server creation)
• ts/index.ts (add SSL config options)

---

5. Production Configuration System ⚙️

Why: Production needs flexible configuration, not just constructor options.

Implementation Required:

• Support configuration file (JSON/YAML)
• Environment variable support
• Configuration validation
• Sensible production defaults
• Example configurations for common use cases

Configuration File Example (smarts3.config.json):

{
  "server": {
    "port": 3000,
    "address": "0.0.0.0",
    "ssl": {
      "enabled": true,
      "cert": "./certs/server.crt",
      "key": "./certs/server.key"
    }
  },
  "storage": {
    "directory": "./s3-data",
    "cleanSlate": false
  },
  "auth": {
    "enabled": true,
    "credentials": [
      {
        "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
        "secretAccessKey": "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
      }
    ]
  },
  "cors": {
    "enabled": true,
    "allowedOrigins": ["*"],
    "allowedMethods": ["GET", "POST", "PUT", "DELETE", "HEAD"],
    "allowedHeaders": ["*"]
  },
  "limits": {
    "maxObjectSize": 5368709120,
    "maxMetadataSize": 2048,
    "requestTimeout": 300000
  },
  "logging": {
    "level": "info",
    "format": "json",
    "accessLog": {
      "enabled": true,
      "path": "./logs/access.log"
    },
    "errorLog": {
      "enabled": true,
      "path": "./logs/error.log"
    }
  }
}

Files to Create/Modify:

• ts/classes/config-loader.ts (new)
• ts/classes/config-validator.ts (new)
• ts/index.ts (use config loader)
• Create example config files in root

---

6. Production Logging 📝

Why: Console logs aren't suitable for production monitoring.

Implementation Required:

• Structured logging (JSON format option)
• Log levels (ERROR, WARN, INFO, DEBUG)
• File rotation support
• Access logs (S3 standard format)
• Integration with logging library

Files to Create/Modify:

• ts/classes/logger.ts (new - use @push.rocks/smartlog?)
• ts/classes/access-logger-middleware.ts (new)
• ts/classes/smarts3-server.ts (replace console.log with logger)
• All controller files (use structured logging)

---

🔧 Important Features (Should Have)

7. Health Check & Metrics 💊

Implementation Required:

• GET /_health endpoint (non-S3, for monitoring)
• GET /_metrics endpoint (Prometheus format?)
• Server stats (requests/sec, storage used, uptime)
• Readiness/liveness probes for Kubernetes

Files to Create/Modify:

• ts/controllers/health.controller.ts (new)
• ts/classes/metrics-collector.ts (new)
• ts/classes/smarts3-server.ts (add health routes)

---

8. Batch Operations 📦

Implementation Required:

• POST /:bucket?delete - DeleteObjects (delete multiple objects in one request)
• Essential for efficient cleanup operations

Files to Create/Modify:

• ts/controllers/object.controller.ts (add deleteObjects method)

---

9. Request Size Limits & Validation 🛡️

Implementation Required:

• Max object size configuration
• Max metadata size limits
• Request timeout configuration
• Body size limits
• Bucket name validation (S3 rules)
• Key name validation

Files to Create/Modify:

• ts/classes/validation-middleware.ts (new)
• ts/utils/validators.ts (new)
• ts/classes/smarts3-server.ts (integrate validation middleware)

---

10. Conditional Requests 🔄

Implementation Required:

• If-Match / If-None-Match (ETag validation)
• If-Modified-Since / If-Unmodified-Since
• Required for caching and conflict prevention

Files to Create/Modify:

• ts/controllers/object.controller.ts (add conditional logic to GET/HEAD)

---

11. Graceful Shutdown 👋

Implementation Required:

• Drain existing connections
• Reject new connections
• Clean multipart cleanup on shutdown
• SIGTERM/SIGINT handling

Files to Create/Modify:

• ts/classes/smarts3-server.ts (add graceful shutdown logic)
• ts/index.ts (add signal handlers)

---

💡 Nice-to-Have Features

12. Advanced Features

• Bucket versioning support
• Object tagging
• Lifecycle policies (auto-delete old objects)
• Storage class simulation (STANDARD, GLACIER, etc.)
• Server-side encryption simulation
• Presigned URL support (for time-limited access)

13. Performance Optimizations

• Stream optimization for large files
• Optional in-memory caching for small objects
• Parallel upload/download support
• Compression support (gzip)

14. Developer Experience

• Docker image for easy deployment
• Docker Compose examples
• Kubernetes manifests
• CLI for server management
• Admin API for bucket management

---

📐 Implementation Phases

Phase 1: Critical Production Features (Priority 1)

Estimated Effort: 2-3 weeks

1. ✅ Multipart uploads (biggest technical lift)
2. ✅ Configurable authentication
3. ✅ CORS middleware
4. ✅ Production configuration system
5. ✅ Production logging

Outcome: smarts3 can handle real production workloads

---

Phase 2: Reliability & Operations (Priority 2)

Estimated Effort: 1-2 weeks

6. ✅ SSL/TLS support
7. ✅ Health checks & metrics
8. ✅ Request validation & limits
9. ✅ Graceful shutdown
10. ✅ Batch operations

Outcome: smarts3 is operationally mature

---

Phase 3: S3 Compatibility (Priority 3)

Estimated Effort: 1-2 weeks

11. ✅ Conditional requests
12. ✅ Additional S3 features as needed
13. ✅ Comprehensive test suite
14. ✅ Documentation updates

Outcome: smarts3 has broad S3 API compatibility

---

Phase 4: Polish (Priority 4)

Estimated Effort: As needed

15. ✅ Docker packaging
16. ✅ Performance optimization
17. ✅ Advanced features based on user feedback

Outcome: smarts3 is a complete MinIO alternative

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🤔 Open Questions

1. Authentication: Do you want full AWS Signature V4 validation, or simpler static credential checking?
2. Configuration: Prefer JSON, YAML, or .env file format?
3. Logging: Do you have a preferred logging library, or shall I use @push.rocks/smartlog?
4. Scope: Should we tackle all of Phase 1, or start with a subset (e.g., just multipart + auth)?
5. Testing: Should we add comprehensive tests as we go, or batch them at the end?
6. Breaking changes: Can I modify the constructor options interface, or must it remain backward compatible?

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🎯 Target Use Cases

With this plan implemented, smarts3 will be a solid MinIO alternative for:

✅ Local S3 development - Fast, simple, no Docker required ✅ Testing S3 integrations - Reliable, repeatable tests ✅ Microservices using S3 API with filesystem backend ✅ CI/CD pipelines - Lightweight S3 for testing ✅ Small-to-medium production deployments where MinIO is overkill ✅ Edge computing - S3 API for local file storage ✅ Embedded systems - Minimal dependencies, small footprint

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📊 Current vs. Production Comparison

Feature	Current	After Phase 1	After Phase 2	Production Ready
Basic S3 ops	✅	✅	✅	✅
Multipart upload	❌	✅	✅	✅
Authentication	⚠️ (hardcoded)	✅	✅	✅
CORS	❌	✅	✅	✅
SSL/TLS	❌	❌	✅	✅
Config files	❌	✅	✅	✅
Production logging	⚠️ (console)	✅	✅	✅
Health checks	❌	❌	✅	✅
Request limits	❌	❌	✅	✅
Graceful shutdown	❌	❌	✅	✅
Conditional requests	❌	❌	❌	✅
Batch operations	❌	❌	✅	✅

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📝 Notes

• All features should maintain backward compatibility where possible
• Each feature should include comprehensive tests
• Documentation (readme.md) should be updated as features are added
• Consider adding a migration guide for users upgrading from testing to production use
• Performance benchmarks should be established and maintained

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Last Updated: 2025-11-23 Status: Planning Phase Next Step: Get approval and prioritize implementation order