fix: Restore previous device configuration (#1014)

#!/usr/bin/env bash

set -Eeuo pipefail

[[ "${BALLOONING:-}" != [Yy1]* ]] && return 0

: "${BALLOONING:="N"}"

[[ "$BALLOONING" != [Yy1]* ]] && return 0

# By default, the VM is allocated the full amount of RAM configured via RAM_SIZE for its entire lifetime, but if you want

# the container to dynamically reclaim unused guest RAM based on host memory pressure, you can enable memory ballooning.

  DEV_OPTS="-object rng-random,id=objrng0,filename=/dev/urandom"

  DEV_OPTS+=" -device virtio-rng-pci,rng=objrng0,id=rng0,bus=pcie.0"

  if [[ "${BOOT_MODE,,}" != "windows"* || "${BALLOONING:-}" == [Yy1]* ]]; then

    [[ "${BALLOONING:-}" == [Yy1]* ]] && MON_OPTS+=" -qmp unix:${QEMU_DIR}/qemu-qmp-ballooning.sock,server,nowait"

    if [[ "${BALLOONING:-}" != [Yy1]* ]]; then

      DEV_OPTS+=" -device virtio-balloon-pci,id=balloon0,bus=pcie.0"

    else

      MON_OPTS+=" -qmp unix:${QEMU_DIR}/qemu-qmp-ballooning.sock,server,nowait"

      DEV_OPTS+=" -device virtio-balloon-pci,free-page-reporting=on,guest-stats-polling-interval=1,id=balloon0,bus=pcie.0"

    fi

  fi

fi

if [ -d "/shared" ] && [[ "${BOOT_MODE,,}" != "windows"* ]]; then

  DEV_OPTS+=" -fsdev local,id=fsdev0,path=/shared,security_model=none"