QEMU VM Creator

new_vm.sh

#!/bin/sh

case $1 in
    '-h'|'--help')
        printf 'Usage: %s VM_NAME CPUS MEMORY DISK\n' "$0"
        exit 0
esac

[ $# -ne 4 ] && printf 'ERROR: Need 4 arguments. Check -h/--help.\n' && exit 1

mkdir "$1"
cp /usr/share/edk2-ovmf/x64/OVMF_VARS.fd "$1/uefi_vars.fd"
qemu-img create -f qcow2 "$1/disk.qcow2" "$4"

cat << EOF > "$1/start.sh"
#!/usr/bin/env sh

case \$1 in
    '-h'|'--help')
        printf 'Usage: %s [ISO]\\n' "\$0"
        exit 0
esac

[ \$# -gt 1 ] && printf 'ERROR: Too many arguments. Check -h/--help.\\n' && exit 1

ISO=''
[ -n "\$1" ] && ISO="-device virtio-blk,drive=iso,bootindex=1 \\
                    -drive file=\$1,format=raw,if=none,media=cdrom,id=iso"

eval qemu-system-x86_64 \\
	-enable-kvm \\
	-machine q35 \\
	-device intel-iommu \\
	-cpu host \\
	-smp $2 \\
	-m $3 \\
	-vga none \\
	-display gtk,gl=on,full-screen=on \\
	-device virtio-vga-gl \\
	-nic user,model=virtio-net-pci \\
	-device intel-hda \\
	-device hda-duplex \\
	-device virtio-balloon \\
	-device virtio-blk,drive=disk,bootindex=2 \\
	-drive file=disk.qcow2,format=qcow2,if=none,aio=native,cache.direct=on,id=disk \\
	-drive if=pflash,format=raw,read-only=on,file=/usr/share/edk2-ovmf/x64/OVMF_CODE.fd \\
	-drive if=pflash,format=raw,file=uefi_vars.fd \\
	"\$ISO"
EOF
chmod +x "$1/start.sh"