- Updated bootstrap service to use authenticated HTTP client with cluster auth headers
- Made GET /members/ endpoint unprotected for monitoring/inspection purposes
- All other cluster communication endpoints remain protected by cluster auth middleware
This ensures proper cluster formation while maintaining security for inter-node communication.
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Co-Authored-By: Claude <noreply@anthropic.com>
Implemented a comprehensive secure authentication mechanism for inter-node
cluster communication with the following features:
1. Global Cluster Secret (GCS)
- Auto-generated cryptographically secure random secret (256-bit)
- Configurable via YAML config file
- Shared across all cluster nodes for authentication
2. Cluster Authentication Middleware
- Validates X-Cluster-Secret and X-Node-ID headers
- Applied to all cluster endpoints (/members/*, /merkle_tree/*, /kv_range)
- Comprehensive logging of authentication attempts
3. Authenticated HTTP Client
- Custom HTTP client with cluster auth headers
- TLS support with configurable certificate verification
- Protocol-aware (http/https based on TLS settings)
4. Secure Bootstrap Endpoint
- New /auth/cluster-bootstrap endpoint
- Protected by JWT authentication with admin scope
- Allows new nodes to securely obtain cluster secret
5. Updated Cluster Communication
- All gossip protocol requests include auth headers
- All Merkle tree sync requests include auth headers
- All data replication requests include auth headers
6. Configuration
- cluster_secret: Shared secret (auto-generated if not provided)
- cluster_tls_enabled: Enable TLS for inter-node communication
- cluster_tls_cert_file: Path to TLS certificate
- cluster_tls_key_file: Path to TLS private key
- cluster_tls_skip_verify: Skip TLS verification (testing only)
This implementation addresses the security vulnerability of unprotected
cluster endpoints and provides a flexible, secure approach to protecting
internal cluster communication while allowing for automated node bootstrapping.
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Co-Authored-By: Claude <noreply@anthropic.com>
- Add AllowAnonymousRead and AllowAnonymousWrite config parameters
- Set both to false by default for security
- Apply conditional authentication middleware to KV endpoints:
- GET requires auth if AllowAnonymousRead is false
- PUT requires auth if AllowAnonymousWrite is false
- DELETE always requires authentication (no anonymous delete)
- Update integration tests to enable anonymous access for testing
- Maintain backward compatibility when AuthEnabled is false
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Co-Authored-By: Claude <noreply@anthropic.com>
- Add conditional route registration based on feature toggles
- AuthEnabled now controls authentication/user management endpoints
- ClusteringEnabled controls member and Merkle tree endpoints
- RevisionHistoryEnabled controls history endpoints
- Feature toggles for RateLimitingEnabled and TamperLoggingEnabled were already implemented
This completes issue #6 allowing flexible deployment scenarios by disabling
unnecessary features and their associated endpoints.
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Co-Authored-By: Claude <noreply@anthropic.com>
- Removed all duplicate Server methods from main.go (630 lines)
- Fixed import conflicts and unused imports
- main.go reduced from 3,298 to 340 lines (89% reduction)
- Clean modular structure with server package handling all server functionality
- Achieved clean build with no compilation errors
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Co-Authored-By: Claude <noreply@anthropic.com>
Created server package with:
- server.go: Server struct and core methods
- handlers.go: HTTP handlers for health, KV operations, cluster management
- routes.go: HTTP route setup
- lifecycle.go: Server startup/shutdown logic
This moves ~400 lines of server-related code from main.go to dedicated
server package for better organization.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
