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tools: add vm-boot for testing ISOs
author
lassulus
date
(Jun 19, 2025, 6:03 PM CEST)
commit
8cf9bff7
8cf9bff7376611da5bf145493ffc3bd5040f8958
parent
684ebcb3
684ebcb3676a8f70d20da2f77a79af933b85cc4f
+176
+17
tools/vm-boot/flake-module.nix
+17
tools/vm-boot/flake-module.nix
+159
tools/vm-boot/vm-boot.sh
+159
tools/vm-boot/vm-boot.sh
···
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#!/usr/bin/env bash
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set -euo pipefail
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set -x
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# Default values
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ISO_FILE=""
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MEMORY="2048"
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CPUS="2"
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ARCH=""
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usage() {
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cat <<EOF
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Usage: $0 [OPTIONS] ISO_FILE
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Boot an ISO file in a VM with automatic architecture detection.
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OPTIONS:
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-m, --memory SIZE Memory in MB (default: 2048)
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-c, --cpus COUNT Number of CPU cores (default: 2)
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-a, --arch ARCH Force architecture (x86_64 or aarch64)
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-h, --help Show this help message
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EXAMPLE:
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$0 installer.iso
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$0 -m 4096 -c 4 installer.iso
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$0 -a x86_64 installer.iso
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EOF
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}
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# Parse arguments
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while [[ $# -gt 0 ]]; do
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case $1 in
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-m|--memory)
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MEMORY="$2"
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shift 2
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;;
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-c|--cpus)
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CPUS="$2"
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shift 2
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;;
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-a|--arch)
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ARCH="$2"
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shift 2
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;;
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-h|--help)
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usage
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exit 0
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;;
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-*)
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echo "Unknown option: $1"
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usage
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exit 1
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;;
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*)
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if [ -z "$ISO_FILE" ]; then
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ISO_FILE="$1"
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else
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echo "Multiple ISO files specified"
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usage
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exit 1
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fi
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shift
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;;
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esac
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done
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# Check if ISO file is provided
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if [ -z "$ISO_FILE" ]; then
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echo "Error: ISO file not specified"
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usage
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exit 1
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fi
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# Check if ISO file exists
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if [ ! -f "$ISO_FILE" ]; then
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echo "Error: ISO file '$ISO_FILE' not found"
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exit 1
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fi
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# Detect architecture if not specified
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if [ -z "$ARCH" ]; then
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echo "Detecting ISO architecture..."
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ISO_INFO=$(file "$ISO_FILE")
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if echo "$ISO_INFO" | grep -q "aarch64"; then
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ARCH="aarch64"
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elif echo "$ISO_INFO" | grep -q "x86-64\|x86_64"; then
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ARCH="x86_64"
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else
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# Try to extract more info from the ISO
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ISO_LABEL=$(blkid -o value -s LABEL "$ISO_FILE" 2>/dev/null || echo "")
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if echo "$ISO_LABEL" | grep -q "aarch64"; then
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ARCH="aarch64"
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elif echo "$ISO_LABEL" | grep -q "x86"; then
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ARCH="x86_64"
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else
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echo "Could not detect architecture from ISO. Please specify with -a option."
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echo "Supported architectures: x86_64, aarch64"
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exit 1
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fi
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fi
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fi
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echo "Booting $ISO_FILE with $ARCH architecture..."
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echo "Memory: $MEMORY MB, CPUs: $CPUS"
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# Build QEMU command based on architecture
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if [ "$ARCH" = "x86_64" ]; then
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echo "Starting x86_64 VM with EFI..."
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# Get the x86_64-linux UEFI firmware
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echo "Building x86_64-linux UEFI firmware..."
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UEFI_STORE_PATH=$(nix build --no-link --print-out-paths --system x86_64-linux nixpkgs#OVMF.fd)
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UEFI_FW="$UEFI_STORE_PATH/FV/OVMF.fd"
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if [ ! -f "$UEFI_FW" ]; then
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echo "Error: Could not find x86_64 UEFI firmware at $UEFI_FW"
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exit 1
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fi
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echo "Using UEFI firmware: $UEFI_FW"
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exec qemu-system-x86_64 \
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-machine q35 \
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-cpu qemu64 \
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-m "$MEMORY" \
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-smp "$CPUS" \
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-accel tcg \
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-bios "$UEFI_FW" \
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-cdrom "$ISO_FILE" \
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-boot d \
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-nographic \
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-serial mon:stdio
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elif [ "$ARCH" = "aarch64" ]; then
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echo "Starting aarch64 VM..."
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# Get the aarch64-linux UEFI firmware
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echo "Building aarch64 UEFI firmware..."
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# Use the pre-built firmware path we know works
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UEFI_FW="/nix/store/2ciakp99mrcb3fx98j6ji0nxkxcyq5gy-OVMF-202505-fd/FV/QEMU_EFI.fd"
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if [ ! -f "$UEFI_FW" ]; then
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echo "Firmware not found in store, building..."
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UEFI_STORE_PATH=$(nix build --no-link --print-out-paths nixpkgs#OVMF-fd.aarch64-linux)
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UEFI_FW="$UEFI_STORE_PATH/FV/QEMU_EFI.fd"
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fi
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if [ ! -f "$UEFI_FW" ]; then
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echo "Error: Could not find aarch64 UEFI firmware at $UEFI_FW"
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exit 1
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fi
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echo "Using UEFI firmware: $UEFI_FW"
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exec qemu-system-aarch64 \
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-machine virt \
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-cpu cortex-a57 \
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-m "$MEMORY" \
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-smp "$CPUS" \
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-accel tcg \
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-bios "$UEFI_FW" \
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-cdrom "$ISO_FILE" \
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-boot d \
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-nographic
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else
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echo "Error: Unsupported architecture '$ARCH'"
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echo "Supported architectures: x86_64, aarch64"
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exit 1
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fi