Initial commit of quickemu.sh

quickemu.sh

@@ -0,0 +1,177 @@
+#!/usr/bin/env bash
+
+# Usage:
+#  - sudo apt install qemu qemu-kvm libvirt-clients libvirt-daemon bridge-utils samba ovmf
+#  - sudo apt install libvirt-bin # on 18.04
+#  - sudo adduser ${SUDO_USER} kvm
+#  - Download an ISO image
+#  - Your home directory on the host will be available via samba on the guest VM via smb://10.0.2.4/qemu
+
+LAUNCHER=$(basename $0 .sh)
+allcores=$(nproc --all)
+if [ ${allcores} -ge 8 ]; then
+  cores="4"
+elif [ ${allcores} -ge 4 ]; then
+  cores="2"
+else
+  cores="1"
+fi
+
+allram=$(free --mega -h | grep Mem | cut -d':' -f2 | cut -d'G' -f1 | sed 's/ //g')
+if [ ${allram} -ge 64 ]; then
+  ram="4G"
+elif [ ${allram} -ge 16 ]; then
+  ram="3G"
+else
+  ram="2G"
+fi
+
+disk="64G"
+xres="1440"
+yres="900"
+ver=$(qemu-system-x86_64 -version | head -n1 | cut -d' ' -f4 | cut -d'(' -f1)
+if [ "${ver}" == "2.11.1" ]; then
+  display="-display sdl"
+  # Fix stuttering mouse pointer when SDL backend is used.
+  export SDL_VIDEO_X11_DGAMOUSE=0
+else
+  display="-display gtk,grab-on-hover=on,zoom-to-fit=off"
+fi
+
+function vm_delete() {
+  if [ -f "${disk_img}" ]; then
+    rm "${disk_img}"
+    echo "Deleted ${disk_img}"
+  fi
+  exit 0
+}
+
+function vm_restore() {
+  if [ -f "${disk_img_snapshot}" ]; then
+    mv "${disk_img_snapshot}" "${disk_img}"
+  fi
+  echo "Restored ${disk_img_snapshot}"
+  exit 0
+}
+
+function vm_snapshot() {
+  if [ -f "${disk_img_snapshot}" ]; then
+    mv "${disk_img_snapshot}" "${disk_img_snapshot}.old"
+  fi
+  qemu-img create -b "${disk_img}" -f qcow2 "${disk_img_snapshot}"
+  if [ $? -eq 0 ]; then
+    echo "Created ${disk_img_snapshot}"
+  else
+    echo "Failed to create ${disk_img_snapshot}"
+  fi
+  exit 0
+}
+
+function vm_boot() {
+  if [ ! -f "${disk_img}" ]; then
+    # If there is no disk image, create a new image.
+    qemu-img create -f qcow2 "${disk_img}" "${disk}"
+  else
+    # If there is a disk image, do not boot from the iso
+    iso=""
+  fi
+
+  # Boot the iso image
+  qemu-${ENGINE} \
+    -cdrom "${iso}" \
+    -drive "file=${disk_img},format=qcow2,if=virtio,aio=native,cache.direct=on" \
+    -enable-kvm \
+    -machine q35,accel=kvm \
+    -cpu host,kvm=on \
+    -m ${ram} \
+    -smp ${cores} \
+    -net nic,model=virtio \
+    -net user"${SAMBA}" \
+    -rtc base=localtime,clock=host \
+    -soundhw hda \
+    -usb -device usb-kbd -device usb-tablet \
+    -object rng-random,id=rng0,filename=/dev/urandom \
+    -device virtio-rng-pci,rng=rng0 \
+    -device qemu-xhci \
+    -device virtio-vga,virgl=on,edid=on,xres=${xres},yres=${yres} \
+    ${display} ${BIOS} \
+    "$@"
+}
+
+function usage() {
+  echo
+  echo "Usage"
+  echo "  ${LAUNCHER} --vm ubuntu.conf"
+  echo
+  echo "You can also pass optional parameters"
+  echo "  --delete   : Delete the disk image."
+  echo "  --restore  : Restore the snapshot."
+  echo "  --snapshot : Create a disk snapshot."
+  echo "  --virgil   : Use virgil, if available."
+  exit 1
+}
+
+BIOS="-bios /usr/share/qemu/OVMF.fd"
+DELETE=0
+ENGINE="system-x86_64"
+RESTORE=0
+SAMBA=",smb=${HOME}"
+SNAPSHOT=0
+VM=""
+
+while [ $# -gt 0 ]; do
+  case "${1}" in
+    -delete|--delete)
+      DELETE=1
+      shift;;
+    -restore|--restore)
+      SNAPSHOT=1
+      shift;;
+    -snapshot|--snapshot)
+      SNAPSHOT=1
+      shift;;
+    -virgil|--virgil)
+      BIOS=""
+      ENGINE="virgil"
+      SAMBA=""
+      shift;;
+    -vm|--vm)
+      VM="$2"
+      shift
+      shift;;
+    -h|--h|-help|--help)
+      usage;;
+    *)
+      echo "ERROR! \"${1}\" is not a supported parameter."
+      usage;;
+  esac
+done
+
+if [ -z "${VM}" ] || [ ! -e "${VM}" ]; then
+  echo "ERROR! VM not found."
+  exit 1
+else
+  source "${VM}"
+  if [ -n "${disk_img}" ]; then
+    disk_img_snapshot="${disk_img}.snapshot"
+    echo "${disk_img}"
+    echo "${disk_img_snapshot}"
+  else
+    echo "ERROR! No disk_img defined."
+    exit 1
+  fi
+fi
+
+if [ ${DELETE} -eq 1 ]; then
+  vm_delete
+fi
+
+if [ ${RESTORE} -eq 1 ]; then
+  vm_restore
+fi
+
+if [ ${SNAPSHOT} -eq 1 ]; then
+  vm_snapshot
+fi
+
+vm_boot