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#!/sbin/runscript
# Copyright 2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# To use this, symlink a target kvm instance to this script.
# Literally, ln -s qemu /etc/init.d/<vm-type>.<vmname>
# then have a config named /etc/conf.d/<vm-type>.<vmname>
#
# Allowed vm-types are currently qemu and kvm.
VMNAME=${SVCNAME#*.}
VMTYPE=${SVCNAME%.*}
VM_BINARY=
PIDFILE=/var/run/vm/${SVCNAME}.pid
MONITOR=/var/run/vm/${SVCNAME}.monitor
QTAP_FILE=/var/run/vm/${SVCNAME}.qtap
discern_vm_binary() {
case "$VMTYPE" in
kvm)
VM_BINARY=`type -p qemu-kvm`
[ -z "$VM_BINARY" ] && VM_BINARY=`type -p kvm`
;;
qemu)
VM_BINARY=`type -p qemu`
;;
*)
eerror "Failed to discern the binary for $VMTYPE"
;;
esac
return 0
}
DROP_USER=${DROP_USER:-nobody}
MEMORY=${MEMORY:-512M}
TIMEOUT=${TIMEOUT:-300}
SMP=${SMP:-1}
export KVM_USER=${KVM_USER:-"root"}
extra_commands="reboot"
depend() {
if [ "$VMNAME" = "$SVCNAME" ]; then
return 0
fi
sanity_check || return 1
case "$NIC_TYPE" in
br)
need ${NIC_NET_DEPS-net.br0}
;;
esac
}
send_command() {
local command="socat -u - UNIX-CONNECT:${MONITOR}"
type -p nc6 > /dev/null && command="nc6 -U ${MONITOR} --send-only"
echo "$@" | ${command} > /dev/null 2>&1
}
sanity_check() {
if [ "${VMNAME}" = "${SVCNAME}" ]; then
eerror "You have to create an init script for each vm:"
eerror " ln -s vm /etc/init.d/vm.vmname"
return 1
fi
DISKIMAGE=$(readlink -f "${DISKIMAGE}")
if [ ! -f "${DISKIMAGE}" -a ! -b "${DISKIMAGE}" ]; then
eerror "couldn't find \$DISKIMAGE '$DISKIMAGE'"
return 1;
fi
discern_vm_binary
NIC_TYPE=${NIC_TYPE:-nat}
}
start_pre() {
checkpath -d --owner root:root --mode 0644 "${PIDFILE%/*}" \
"${MONITOR%/*}"
}
start() {
sanity_check || return 1
local NIC_COMMAND=( -net "nic,model=${NIC_MODEL:-virtio},macaddr=${MACADDR}" -net )
if [ "${NIC_TYPE}" = "br" ]; then
ebegin "creating qtap ${QTAP:-(auto allocating one)}"
if [ -n "$QTAP" ]; then
qtap-manipulate create_specific "${QTAP}" -u "${DROP_USER}"
else
QTAP=$(qtap-manipulate create -u "${DROP_USER}")
if [ 0 != $? ]; then
eerror "failed to create qtap interface"
return 1
fi
fi
echo "${QTAP}" > ${QTAP_FILE}
eend $?
NIC_COMMAND[${#NIC_COMMAND[@]}]="tap,ifname=${QTAP},script=no"
elif [ "${NIC_TYPE}" = "none" ]; then
NIC_COMMAND=( -net none )
else
NIC_COMMAND[${#NIC_COMMAND[@]}]=user
fi
ebegin "Starting ${VM_BINARY##*/} for ${VMNAME} at VNC port${VNC}"
start-stop-daemon --start "${VM_BINARY}" \
--pidfile ${PIDFILE} \
-- -daemonize -pidfile ${PIDFILE} -monitor unix:${MONITOR},server,nowait \
-runas ${DROP_USER} -name ${VMNAME} \
-drive file="$DISKIMAGE",if=${DRIVE_MODEL:-virtio},cache=${DRIVE_CACHE:-none} \
"${NIC_COMMAND[@]}" \
${DISABLE_KVM:---enable-kvm} \
${MEMORY:+-m ${MEMORY}} ${SMP:+-smp ${SMP}} ${VNC:+-vnc ${VNC}} ${OTHER_ARGS}
ret=$?
if [ "0" != "${ret}" -a -n "${QTAP}" ]; then
qtap-manipulate destroy ${QTAP}
fi
eend ${ret}
}
reboot() {
if [ ${VMNAME} = ${SVCNAME} ]; then
eerror "You have to create an init script for each vm:"
eerror " ln -s vm /etc/init.d/vm.vmname"
return 1
fi
ebegin "Rebooting ${VMNAME}"
send_command system_reset
eend $?
}
stop() {
sanity_check || return 1
ebegin "Powering off ${VMNAME}"
send_command system_powerdown
eend $?
ebegin "waiting up to ${TIMEOUT:-60} seconds for it to die"
local pid
[ -s "${PIDFILE}" ] && pid=$(cat "${PIDFILE}")
if [ -z "$pid" ]; then
eerror "Couldn't find stored pid at '$PIDFILE'; user will have to manually kill kvm"
eerror "Will attempt to destroy qtap despite."
eend 1
else
local ret=1
for x in $(seq 0 ${TIMEOUT:-60}); do
if kill -0 "${pid}" > /dev/null 2>&1; then
sleep 1s
continue
fi
ret=0
break
done
eend $ret
fi
ebegin "Stopping ${VM_BINARY##*/} for ${VMNAME}"
start-stop-daemon --stop "${VM_BINARY}" \
--user "${DROP_USER}" \
--pidfile "${PIDFILE}" \
--quiet
eend $?
local qtap
[ -s "${QTAP_FILE}" ] && qtap=$(cat "${QTAP_FILE}")
if [ -n "$qtap" ]; then
ebegin "destroying qtap ${qtap}"
qtap-manipulate destroy ${qtap}
eend $?
fi
}
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