Feature Parity `cloud-hypervisor-provider` and `libvirt-provider`

[lukasfrank]

Summary

Achieve feature parity between cloud-hypervisor-provider and libvirt-provider. The cloud-hypervisor-provider covers the core IRI MachineRuntime API but is missing several features needed for production equivalence.

---

Scope

In Scope

• Exec / Interactive Console
• GPU / PCI device passthrough
• Health check endpoint (HTTP liveness probe)
• Provider Network plugin
• Graceful shutdown
• Hugepage support
• Volume cache policy configuration
• Volume resize
• aarch64 architecture support ?

Out of Scope

• Libvirt-style event-driven reconciliation (polling is sufficient)
• Libvirt-specific domain XML management
• Changes to the IRI API contract itself

---

Responsible Areas

• Virtualization

---

Contributors

• @lukasfrank
• @friegger

---

Acceptance Criteria

• Exec / Console

  • Exec() gRPC method fully implemented

• GPU / PCI Passthrough

  • Resource claim system for GPU devices
  • PCI address management and hotplug
  • Machine class GPU capability advertisement

• Health Check

  • HTTP liveness endpoint validating hypervisor connectivity

• Provider Network Plugin

  • Provider network plugin matching libvirt-provider interface

• Garbage Collector

  • Configurable graceful shutdown timeout
  • Two-phase deletion (graceful → forced)

• Hugepages

  • --enable-hugepages flag with VM config plumbing

• Volume Cache Policy

  • Configurable cache policy flag (none/writeback/writethrough/directsync/unsafe)

• aarch64

  • Architecture detection and firmware path selection

---

Action Items

• Assign labels (e.g., area/virtualization, kind/feature)
• Set milestone
• Create sub-issues for: Exec, GPU, Health Check, Guest Agent, Provider Network, GC, Hugepages, Cache Policy, aarch64
• Assign an owner to the issue
• List all contributors in the "Contributors" section above
• Add this issue to the Roadmap project board