61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
Markdown
# mcqemu
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An MCP server that lets LLM agents manage QEMU virtual machines: launch and
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stop VMs, inspect them over QMP, manage disk images with qemu-img, take live
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snapshots, and run commands inside guests through qemu-guest-agent.
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## Requirements
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- Linux with QEMU installed (`qemu-system-*` and `qemu-img` on PATH)
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- `/dev/kvm` access for hardware acceleration (optional — TCG emulation works
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without it, just slower)
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- Python 3.11+ managed with [uv](https://docs.astral.sh/uv/)
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## Install
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```bash
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# From this checkout
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uv sync
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# Add to Claude Code
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claude mcp add mcqemu -- uv run --directory /path/to/mcqemu mcqemu
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```
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## What it can do
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| Group | Tools |
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| Lifecycle | `launch_vm`, `stop_vm`, `pause_vm`, `resume_vm`, `attach_vm`, `forget_vm` |
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| Inspect | `list_vms`, `vm_info` |
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| Live snapshots | `vm_snapshot_create` / `restore` / `delete` / `list` |
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| Disk images | `image_create`, `image_info`, `image_convert`, `image_resize`, `image_snapshot_*` |
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| Guest agent | `guest_ping`, `guest_info`, `guest_exec`, `guest_file_read`, `guest_file_write` |
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VMs are daemonized QEMU processes with QMP control sockets, so they survive
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MCP server restarts. The registry lives in `~/.local/share/mcqemu/`, sockets
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in `$XDG_RUNTIME_DIR/mcqemu/`.
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Guest tools (`guest_*`) need `qemu-guest-agent` installed inside the guest OS;
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the host-side virtio-serial channel is wired on every launch, so installing
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the agent in the guest is the only step.
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## Quick start
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```
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image_create(path="~/vms/test.qcow2", size="10G")
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launch_vm(name="test", disks=["~/vms/test.qcow2"], iso="~/isos/alpine.iso",
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port_forwards=["2222:22"])
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# ... install the OS via the serial console log ...
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stop_vm(name="test")
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launch_vm(name="test", disks=["~/vms/test.qcow2"])
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guest_exec(name="test", command="uname", args=["-a"])
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```
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## Development
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```bash
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uv run pytest # unit tests (QMP and subprocess mocked)
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uv run pytest -m integration # boots a real tiny VM (needs QEMU installed)
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uv run ruff check .
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```
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