microvm-adb

This VM includes tailscale and can be removed if you prefer.

Note: VM set for 3 * 1024 of memory usage, known bug in QEMU setting 2 Gig memory usage, recommended to set above or bellow.

Test It

git clone https://github.com/noflcl/microvm-adb.git
cd microvm-adb

nix run .#vm-adb

Adding Devices To VM

Permission setup is automatic for declared "pci' devices, but manual for "usb" devices. To pass a USB through run lsusb on your VM Host system to locate the devices vendorID and productID, you will need to add the prefix of 0x to each ID within the guests configuration.

USB Passthrough

guest.nix

# lsusb to find vendorID & productID, add the `0x` prefix
devices = [
  { bus = "usb"; path = "vendorid=0x18d1,productid=0x4ee7"; }
  { bus = "usb"; path = "vendorid=0x18d1,productid=0x4ee0"; }
];

host.nix

USB device paths are not directly translatable to udev rules. Your VM host will need to setup a udev services file to pass the devices to qemu guest. You can omit the 0x at the beginning of your IDs here.

###
# Services
###
services.udev.extraRules = ''
  SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4ee7", GROUP="kvm"
  SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", ATTR{idProduct}=="4ee0", GROUP="kvm"
'';

PCI Passthrough

Read the MicroVM docs over here for setting up PCI Passthrough. The USB on my motherboard has to many items on the PCI bus for me to sacrifice it to the VM 😋 so I opt to just pass USB and create the udev rules required.

To-Do

• Upgrade to supported NixOS 24.11
• Finish setting up SOPS to manage keys for reproducible ADB server