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@Mic92
Created May 12, 2023 06:02
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#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bash -p qemu_kvm -p iproute2
set -x -eu -o pipefail
VM_IMAGE=""
CPUS="${CPUS:-$(nproc)}"
MEMORY="${MEMORY:-4096}"
SSH_PORT="${SSH_PORT:-2222}"
IMAGE_SIZE="${IMAGE_SIZE:-10G}"
extra_flags=()
if [[ -n "${OVMF:-}" ]]; then
extra_flags+=("-bios" "$OVMF")
fi
# https://hydra.nixos.org/job/nixos/unstable-small/nixos.iso_minimal.x86_64-linux
iso=/nix/store/xgkfnwhi3c2lcpsvlpcw3dygwgifinbq-nixos-minimal-23.05pre483386.f212785e1ed-x86_64-linux.iso
nix-store -r "$iso"
for arg in "${@}"; do
case "$arg" in
prepare)
truncate -s"$IMAGE_SIZE" nixos-nvme1.img nixos-nvme2.img
;;
start)
qemu-system-x86_64 -m "${MEMORY}" \
-boot n \
-smp "${CPUS}" \
-enable-kvm \
-cpu max \
-netdev "user,id=mynet0,hostfwd=tcp::${SSH_PORT}-:22" \
-device virtio-net-pci,netdev=mynet0 \
-drive file=nixos-nvme2.img,if=none,id=nvme1,format=raw \
-device nvme,serial=deadbeef1,drive=nvme1 \
-drive file=nixos-nvme1.img,if=none,id=nvme2,format=raw \
-device nvme,serial=deadbeef2,drive=nvme2 \
-cdrom "$iso"/iso/*.iso \
"${extra_flags[@]}"
# after start, go to the console and run:
# passwd
# than you can ssh into the machine:
# ssh -p 2222 nixos@localhost
;;
destroy)
rm -f "$VM_IMAGE"
;;
*)
echo "USAGE: $0 (prepare|start|destroy)"
;;
esac
done
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