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#!/usr/bin/openrc-run
description="Virtual Machine Management (libvirt) Guests"
depend() {
use libvirtd
}
# set the default to QEMU
[ -z "${LIBVIRT_URIS}" ] && LIBVIRT_URIS="qemu:///system"
# default to suspending the VM via managedsave
case "${LIBVIRT_SHUTDOWN}" in
managedsave|shutdown|destroy) ;;
*) LIBVIRT_SHUTDOWN="managedsave" ;;
esac
# default to 500 seconds
[ -z ${LIBVIRT_MAXWAIT} ] && LIBVIRT_MAXWAIT=500
gueststatefile="/var/lib/libvirt/libvirt-guests.state"
netstatefile="/var/lib/libvirt/libvirt-net.state"
do_virsh() {
local hvuri=$1
shift
# if unset, default to qemu
[ -z ${hvuri} ] && hvuri="qemu:///system"
# if only qemu was supplied then correct the value
[ "xqemu" = x${hvuri} ] && hvuri="qemu:///system"
# Silence errors because virsh always throws an error about
# not finding the hypervisor version when connecting to libvirtd
# lastly strip the blank line at the end
LC_ALL=C virsh -c ${hvuri} "$@" 2>/dev/null | head -n -1
}
libvirtd_dom_list() {
# Only work with domains by their UUIDs
local hvuri=$1
shift
# The grep is to remove dom0 for xen domains. Otherwise we never hit 0
do_virsh "${hvuri}" list --uuid $@ | grep -v 00000000-0000-0000-0000-000000000000
}
libvirtd_dom_count() {
local hvuri=$1
shift
libvirtd_dom_list "${hvuri}" $@ | wc -l
}
libvirtd_net_list() {
# Only work with networks by their UUIDs
local hvuri=$1
shift
do_virsh "${hvuri}" net-list --uuid $@
}
libvirtd_net_count() {
local hvuri=$1
shift
libvirtd_net_list "${hvuri}" $@ | wc -l
}
libvirtd_dom_stop() {
# stops all persistent or transient domains for a given URI
# $1 - uri
# $2 - persisent/transient
local uri=$1
local persist=$2
local shutdown_type=${LIBVIRT_SHUTDOWN}
local counter=${LIBVIRT_MAXWAIT}
local dom_name=
local dom_as=
local dom_ids=
local uuid=
local dom_count=
[ "${persist}" = "--transient" ] && shutdown_type="shutdown"
[ -n "${counter}" ] || counter=500
einfo " Shutting down domain(s) ..."
# grab all persistent or transient domains running
dom_ids=$(libvirtd_dom_list ${uri} ${persist})
for uuid in ${dom_ids}; do
# Get the name
dom_name=$(do_virsh ${uri} domname ${uuid})
einfo " ${dom_name}"
# Get autostart state
dom_as=$(do_virsh ${uri} dominfo ${uuid} | \
awk '$1 == "Autostart:" { print $2 }')
if [ "${persist}" = "--persistent" ]; then
# Save our running state only if LIBVIRT_IGNORE_AUTOSTART != yes
if [ "x${LIBVIRT_IGNORE_AUTOSTART}" = "xyes" ] && \
[ ${dom_as} = "enabled" ]; then
:
else
echo "${uri} ${uuid}" >> ${gueststatefile}
fi
fi
# Now let's stop it
do_virsh "${uri}" ${shutdown_type} ${uuid} > /dev/null
done
dom_count="$(libvirtd_dom_count ${uri} ${persist})"
while [ ${dom_count} -gt 0 ] && [ ${counter} -gt 0 ] ; do
dom_count="$(libvirtd_dom_count ${uri} ${persist})"
sleep 1
if [ "${shutdown_type}" = "shutdown" ]; then
counter=$((${counter} - 1))
fi
printf "."
done
if [ "${shutdown_type}" = "shutdown" ]; then
# grab all domains still running
dom_ids=$(libvirtd_dom_list ${uri} ${persist})
for uuid in ${dom_ids}; do
dom_name=$(do_virsh ${uri} domname ${uuid})
eerror " ${dom_name} forcibly stopped"
do_virsh "${uri}" destroy ${uuid} > /dev/null
done
fi
}
libvirtd_net_stop() {
# stops all persistent or transient domains for a given URI
# $1 - uri
# $2 - persisent/transient
local uri=$1
local persist=$2
local uuid=
local net_name=
if [ "${LIBVIRT_NET_SHUTDOWN}" != "no" ]; then
einfo " Shutting down network(s):"
for uuid in $(libvirtd_net_list ${uri} ${persist}); do
net_name=$(do_virsh ${uri} net-name ${uuid})
einfo " ${net_name}"
if [ "${persist}" = "--persistent" ]; then
# Save our running state
echo "${uri} ${uuid}" >> ${netstatefile}
fi
# Actually stop the network
do_virsh qemu net-destroy ${uuid} > /dev/null
done
fi
}
start() {
local uri=
local uuid=
local name=
for uri in ${LIBVIRT_URIS}; do
do_virsh "${uri}" connect
if [ $? -ne 0 ]; then
eerror "Failed to connect to '${uri}'. Domains may not start."
fi
done
[ ! -e "${netstatefile}" ] && touch "${netstatefile}"
[ ! -e "${gueststatefile}" ] && touch "${gueststatefile}"
# if the user didn't want to start any guests up then respect their wish
[ "x${LIBVIRT_START}" = "xno" ] && return 0
# start networks
ebegin "Starting libvirt networks"
while read -r uri uuid
do
# ignore trash
[ -z "${uri}" ] || [ -z "${uuid}" ] && continue
name=$(do_virsh "${uri}" net-name ${uuid})
einfo " ${name}"
do_virsh "${uri}" net-start ${uuid} > /dev/null
done <"${netstatefile}"
eend 0
# start domains
ebegin "Starting libvirt domains"
while read -r uri uuid
do
# ignore trash
[ -z "${uri}" ] || [ -z "${uuid}" ] && continue
name=$(do_virsh "${uri}" domname ${uuid})
einfo " ${name}"
do_virsh "${uri}" start ${uuid} > /dev/null
do_virsh "${uri}" domtime --sync ${uuid} > /dev/null
done <"${gueststatefile}"
eend 0
}
stop() {
local counter=
local dom_name=
local net_name=
local dom_ids=
local uuid=
local dom_count=
rm -f "${gueststatefile}"
[ $? -ne 0 ] && eerror "Unable to save domain state"
rm -f "${netstatefile}"
[ $? -ne 0 ] && eerror "Unable to save net state"
for uri in ${LIBVIRT_URIS}; do
einfo "Stopping libvirt domains and networks for ${uri}"
libvirtd_dom_stop "${uri}" "--persistent"
libvirtd_dom_stop "${uri}" "--transient"
libvirtd_net_stop "${uri}" "--persistent"
libvirtd_net_stop "${uri}" "--transient"
einfo "Done stopping domains and networks for ${uri}"
done
}
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