initial commit of the init script, a sample config and Readme.

1 files changed, 113 insertions, 0 deletions

diff --git a/kvm-init-script b/kvm-init-script
new file mode 100644
index 0000000..155e7c6
--- /dev/null
+++ b/kvm-init-script
@@ -0,0 +1,113 @@
+#!/sbin/runscript
+# Copyright 2009 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+VMNAME=${SVCNAME#*.}
+PIDFILE=/var/run/vm/${VMNAME}.pid
+MONITOR=/var/run/vm/${VMNAME}.monitor
+QTAP_FILE=/var/run/vm/${VMNAME}.qtap
+
+# modify this
+VMSOFTWARE=${VMSOFTWARE:-kvm}
+DROP_USER=${DROP_USER:-nobody}
+MEMORY=${MEMORY:-500M}
+TIMEOUT=${TIMEOUT:-300}
+SMP=${SMP:-1}
+
+opts="reboot"
+
+depend() {
+	need net.br0
+}
+
+send_command() {
+    local command="socat -u - UNIX-CONNECT:${MONITOR}"
+    which nc6 &> /dev/null && command="nc6 -U ${MONITOR} --send-only"
+    echo "$@" | ${command} >/dev/null 2>&1
+}
+
+sanity_check() {
+    if [ ${VMNAME} = ${SVCNAME} ]; then
+        eerror "You have to create an init script for each vm:"
+        eerror " ln -s vm /etc/init.d/vm.vmname"
+        return 1
+    elif [ ! -f "${DISKIMAGE}" ]; then
+    	eerror "couldn't find \$DISKIMAGE '$DISKIMAGE'"
+    	return 1;
+   	fi
+}
+
+start() {
+    sanity_check
+
+    img=$(readlink -f "${DISKIMAGE}")
+    [ -z "$img" ] && {
+        eerror "couldn't find ${DISKIMAGE}"
+        return 1;
+    }
+    
+    mkdir -p $(dirname ${PIDFILE}) $(dirname ${MONITOR})
+    ebegin "creating qtap ${QTAP:-(auto allocating one)}"
+    QTAP_RET=$(qtap-manipulate create ${QTAP});
+    if [ 0 != $? ]; then
+        eerror "failed to create qtap interface"
+        return 1
+	fi
+    QTAP=${QTAP:-${QTAP_RET}}
+    echo "${QTAP}" > ${QTAP_FILE}
+    eend $?
+
+    ebegin "Starting ${VMSOFTWARE-qemu} for ${VMNAME} at VNC port${VNC}"
+    start-stop-daemon --start /usr/bin/${VMSOFTWARE-qemu} \
+	--pidfile ${PIDFILE} \
+	-- -daemonize -pidfile ${PIDFILE} -monitor unix:${MONITOR},server,nowait \
+	-runas ${DROP_USER} -name ${VMNAME} \
+	-drive file="$img",if=${DRIVE_MODEL:-virtio},boot=on \
+	-net nic,model=${NIC_MODEL:-virtio},macaddr=${MACADDR} -net tap,ifname=${QTAP},script=no \
+	${DISABLE_KVM:---enable-kvm}  \
+	${MEMORY:+-m ${MEMORY}} ${SMP:+-smp ${SMP}} ${VNC:+-vnc ${VNC}} ${OTHER_ARGS}
+    ret=$?
+    if [ "0" != "${ret}" ]; 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
+
+    ebegin "Powering off ${VMNAME}"
+    send_command system_powerdown
+    eend $?
+
+    ebegin "waiting up to ${TIMEOUT:-60} seconds for it to die"
+    ret=1
+    for x in $(seq 0 ${TIMEOUT:-60}); do
+    	kill -0 $(<$PIDFILE) &> /dev/null || { ret=0; break; }
+    	sleep 1s
+    done
+    eend ${ret}
+
+    ebegin "Stopping ${VMSOFTWARE-qemu} for ${VMNAME}"
+    start-stop-daemon --stop /usr/bin/${VMSOFTWARE-qemu} \
+	--user ${DROP_USER} \
+	--pidfile ${PIDFILE} \
+	--quiet
+    eend $?
+	QTAP=$(<${QTAP_FILE})
+    ebegin "destroying qtap ${QTAP}"
+    qtap-manipulate destroy ${QTAP}
+    eend $?
+}