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Initial commit of quickemu.sh
This commit is contained in:
Martin Wimpress
parent
2a67eb50a7
commit
30556ab9df
1 changed files with 177 additions and 0 deletions
177
quickemu.sh
Executable file
177
quickemu.sh
Executable file
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#!/usr/bin/env bash
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# Usage:
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# - sudo apt install qemu qemu-kvm libvirt-clients libvirt-daemon bridge-utils samba ovmf
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# - sudo apt install libvirt-bin # on 18.04
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# - sudo adduser ${SUDO_USER} kvm
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# - Download an ISO image
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# - Your home directory on the host will be available via samba on the guest VM via smb://10.0.2.4/qemu
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LAUNCHER=$(basename $0 .sh)
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allcores=$(nproc --all)
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if [ ${allcores} -ge 8 ]; then
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cores="4"
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elif [ ${allcores} -ge 4 ]; then
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cores="2"
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else
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cores="1"
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fi
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allram=$(free --mega -h | grep Mem | cut -d':' -f2 | cut -d'G' -f1 | sed 's/ //g')
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if [ ${allram} -ge 64 ]; then
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ram="4G"
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elif [ ${allram} -ge 16 ]; then
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ram="3G"
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else
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ram="2G"
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fi
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disk="64G"
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xres="1440"
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yres="900"
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ver=$(qemu-system-x86_64 -version | head -n1 | cut -d' ' -f4 | cut -d'(' -f1)
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if [ "${ver}" == "2.11.1" ]; then
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display="-display sdl"
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# Fix stuttering mouse pointer when SDL backend is used.
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export SDL_VIDEO_X11_DGAMOUSE=0
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else
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display="-display gtk,grab-on-hover=on,zoom-to-fit=off"
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fi
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function vm_delete() {
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if [ -f "${disk_img}" ]; then
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rm "${disk_img}"
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echo "Deleted ${disk_img}"
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fi
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exit 0
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}
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function vm_restore() {
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if [ -f "${disk_img_snapshot}" ]; then
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mv "${disk_img_snapshot}" "${disk_img}"
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fi
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echo "Restored ${disk_img_snapshot}"
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exit 0
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}
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function vm_snapshot() {
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if [ -f "${disk_img_snapshot}" ]; then
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mv "${disk_img_snapshot}" "${disk_img_snapshot}.old"
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fi
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qemu-img create -b "${disk_img}" -f qcow2 "${disk_img_snapshot}"
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if [ $? -eq 0 ]; then
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echo "Created ${disk_img_snapshot}"
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else
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echo "Failed to create ${disk_img_snapshot}"
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fi
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exit 0
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}
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function vm_boot() {
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if [ ! -f "${disk_img}" ]; then
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# If there is no disk image, create a new image.
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qemu-img create -f qcow2 "${disk_img}" "${disk}"
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else
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# If there is a disk image, do not boot from the iso
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iso=""
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fi
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# Boot the iso image
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qemu-${ENGINE} \
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-cdrom "${iso}" \
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-drive "file=${disk_img},format=qcow2,if=virtio,aio=native,cache.direct=on" \
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-enable-kvm \
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-machine q35,accel=kvm \
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-cpu host,kvm=on \
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-m ${ram} \
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-smp ${cores} \
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-net nic,model=virtio \
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-net user"${SAMBA}" \
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-rtc base=localtime,clock=host \
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-soundhw hda \
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-usb -device usb-kbd -device usb-tablet \
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-object rng-random,id=rng0,filename=/dev/urandom \
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-device virtio-rng-pci,rng=rng0 \
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-device qemu-xhci \
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-device virtio-vga,virgl=on,edid=on,xres=${xres},yres=${yres} \
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${display} ${BIOS} \
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"$@"
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}
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function usage() {
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echo
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echo "Usage"
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echo " ${LAUNCHER} --vm ubuntu.conf"
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echo
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echo "You can also pass optional parameters"
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echo " --delete : Delete the disk image."
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echo " --restore : Restore the snapshot."
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echo " --snapshot : Create a disk snapshot."
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echo " --virgil : Use virgil, if available."
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exit 1
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}
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BIOS="-bios /usr/share/qemu/OVMF.fd"
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DELETE=0
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ENGINE="system-x86_64"
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RESTORE=0
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SAMBA=",smb=${HOME}"
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SNAPSHOT=0
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VM=""
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while [ $# -gt 0 ]; do
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case "${1}" in
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-delete|--delete)
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DELETE=1
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shift;;
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-restore|--restore)
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SNAPSHOT=1
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shift;;
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-snapshot|--snapshot)
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SNAPSHOT=1
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shift;;
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-virgil|--virgil)
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BIOS=""
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ENGINE="virgil"
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SAMBA=""
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shift;;
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-vm|--vm)
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VM="$2"
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shift
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shift;;
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-h|--h|-help|--help)
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usage;;
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*)
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echo "ERROR! \"${1}\" is not a supported parameter."
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usage;;
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esac
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done
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if [ -z "${VM}" ] || [ ! -e "${VM}" ]; then
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echo "ERROR! VM not found."
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exit 1
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else
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source "${VM}"
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if [ -n "${disk_img}" ]; then
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disk_img_snapshot="${disk_img}.snapshot"
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echo "${disk_img}"
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echo "${disk_img_snapshot}"
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else
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echo "ERROR! No disk_img defined."
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exit 1
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fi
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fi
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if [ ${DELETE} -eq 1 ]; then
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vm_delete
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fi
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if [ ${RESTORE} -eq 1 ]; then
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vm_restore
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fi
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if [ ${SNAPSHOT} -eq 1 ]; then
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vm_snapshot
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fi
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vm_boot
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