socketcomputer/backend/src/SlotQemuDefs.ts

// QEMU definitions. These define the base QEMU command lines,
// which are standardized across all crusttest slots.
// (This file has been bastardized for socket2)

import { QemuVmDefinition } from '@computernewb/superqemu';

const kQemuPath = '/srv/collabvm/qemu/bin/qemu-system-x86_64';

// the aio model qemu will use. if possible, leave this at 'io_uring'.
const kQemuAio = 'io_uring';

/// Creates a base definition for a VM with PC chipset.
export function Slot_PCDef(
	// RAM
	ramSize: string,

	// Network
	netdevOption: string = '-netdev user,id=vm.wan',
	netAdapterModel: string = 'rtl8139',
	netMac: string = 'c7:4e:c0:5f:2c:7c',

	// HDA
	hdaIsSsd: boolean = true,
	hdImagePath: string,
	hdImageFormat: string
): QemuVmDefinition {
	let qCommand = [kQemuPath];

	let pushOption = (opt: string) => {
		qCommand.push(opt.substring(0, opt.indexOf(' ')));
		qCommand.push(opt.substring(opt.indexOf(' ') + 1));
	};

	// boilerplate/chipset
	qCommand.push('-nodefaults');
	pushOption('-machine pc-i440fx-2.10,accel=kvm,kernel_irqchip=on,hpet=off,acpi=on,usb=on');
	pushOption('-rtc base=localtime,clock=vm');

	// CPU/RAM
	pushOption(`-cpu pentium3`);
	pushOption(`-m ${ramSize}`); // unlike LVM we don't really want to prealloc per se..

	pushOption(`${netdevOption}`);
	pushOption(`-device ${netAdapterModel},id=vm.netadp,netdev=vm.wan,mac=${netMac}`);

	pushOption(`-drive if=none,file=${hdImagePath},cache=writeback,discard=unmap,format=${hdImageFormat},aio=${kQemuAio},id=vm.hda_drive,bps=65000000,bps_max=65000000,iops=1500,iops_max=2000`);

	// prettier-ignore
	if (hdaIsSsd) 
		pushOption(`-device ide-hd,id=vm.hda,rotation_rate=1,drive=vm.hda_drive`);
	else
		pushOption(`-device ide-hd,id=vm.hda,drive=vm.hda_drive`);

	// CD drive
	pushOption(`-drive if=none,media=cdrom,aio=${kQemuAio},id=vm.cd`);
	pushOption(`-device ide-cd,drive=vm.cd,id=vm.cd_drive`);

	pushOption('-audio driver=none,model=ac97');

	// VGA + usb tablet
	pushOption('-device VGA,id=vm.vga');
	pushOption('-device usb-tablet');

	return {
		id: 'socketvm1',
		command: qCommand.join(' '),
		snapshot: true
	};
}