$ show vatesfr/xen-orchestra
Xen Orchestra is a comprehensive management platform for XenServer/XCP-ng virtualization environments. It provides a web UI (legacy React and modern Vue 3), a REST API, CLI tools, and a backup system. The architecture is a monorepo with multiple packages: server-side plugins (authentication, performance alerts, SDN controller, backups), frontend apps (xo-web React, @xen-orchestra/web Vue 3, @xen-orchestra/lite lightweight), and shared libraries (filesystem abstractions, VHD manipulation, cron parsing, audit logging, etc.). The backend communicates with XenServer hosts via the Xen API (XAPI), while the frontend connects via WebSocket/JSON-RPC or REST. Backup operations can be executed remotely via a proxy. Key data flows involve the web UI sending commands through WebSocket to the server, which translates them into XAPI calls. Backup jobs are scheduled via cron and executed by the backup runner system, streaming VM disks to remote storage. Audit events are logged with cryptographic chaining for tamper evidence. The system includes an MCP server for AI-assisted management. The repo demonstrates high engineering quality in many packages with clean abstractions for async operations, event-driven collections, and modular plugin systems, though it contains legacy components and some incomplete transitions to newer architectures.
The LLM identified 5 files worth highlighting for reuse:
Provides parallel async iteration with configurable concurrency limit and abort support. Reusable in any Node.js project needing controlled async processing, fully self-contained with tests.
Deduplicates async resource acquisition by caching in-flight requests with multi-key tracking. Useful for cache-coordination patterns like connection pooling or token refresh. Isolated and well-tested.
Full cron expression parser and next-run calculator supporting aliases, presets, and timezone handling. Well-tested and isolated, reusable in any scheduler system without additional dependencies.
Implements a tamper-evident audit trail using cryptographic hash chains. Each log entry is linked to the previous via a hash, enabling integrity verification. Fully self-contained and reusable in any application needing verifiable audit logging.
A composable SVG icon system supporting variants (filled, outlined), transformations (rotation, flip), stacking, and custom icon packs. Though designed for Vue 3, the core logic for icon definition and manipulation can be extracted for other frameworks, demonstrating non-obvious icon management patterns.