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openvswitch/debian/openvswitch-switch.init
Gurucharan Shetty b2a0daa5bd debian: Don't recreate bridges during manual restart.
Open vSwitch bridges and ports can be configured through
the /etc/network/interfaces script. During system startup,
Open vSwitch startup script reads the interfaces file
and creates the bridges and ports. During system shutdown,
the bridges and ports are removed.

The same behavior also can occur with a manual 'restart' of
Open vswitch (ex: service openvswitch-switch restart).
This behavior has come across as undesirable in some cases.
ex: When some one manually creates interfaces through ovs-vsctl
and then restarts Open vSwitch, that interface is lost.

This commit changes the startup script such that, interfaces
are created and deleted through the startup script only when
RUNLEVEL environment variable is set. This behavior will be
consistent with the OVS RHEL ifcfg-* scripts too.

Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
2013-11-22 08:07:18 -08:00

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#! /bin/sh
#
# Copyright (C) 2011, 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
### BEGIN INIT INFO
# Provides: openvswitch-switch
# Required-Start: $network $named $remote_fs $syslog
# Required-Stop: $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Open vSwitch switch
# Description: openvswitch-switch provides the userspace components and utilities for
# the Open vSwitch kernel-based switch.
### END INIT INFO
(test -x /usr/sbin/ovs-vswitchd && test -x /usr/sbin/ovsdb-server) || exit 0
. /usr/share/openvswitch/scripts/ovs-lib
test -e /etc/default/openvswitch-switch && . /etc/default/openvswitch-switch
network_interfaces () {
[ -z "${RUNLEVEL}" ] && return
INTERFACES="/etc/network/interfaces"
[ -e "${INTERFACES}" ] || return
bridges=`awk '{ if ($1 == "allow-ovs") { print $2; } }' "${INTERFACES}"`
[ -n "${bridges}" ] && $1 --allow=ovs ${bridges}
}
load_kmod () {
ovs_ctl load-kmod || exit $?
}
start () {
if ovs_ctl load-kmod; then
:
else
echo "Module has probably not been built for this kernel."
if ! test -d /usr/share/doc/openvswitch-datapath-source; then
echo "Install the openvswitch-datapath-source package, then read"
else
echo "For instructions, read"
fi
echo "/usr/share/doc/openvswitch-datapath-source/README.Debian"
if test X"$OVS_MISSING_KMOD_OK" = Xyes; then
# We're being invoked by the package postinst. Do not
# fail package installation just because the kernel module
# is not available.
exit 0
fi
fi
set ovs_ctl ${1-start} --system-id=random
if test X"$FORCE_COREFILES" != X; then
set "$@" --force-corefiles="$FORCE_COREFILES"
fi
set "$@" $OVS_CTL_OPTS
"$@" || exit $?
[ "$2" = "start" ] && network_interfaces ifup
}
stop () {
network_interfaces ifdown
ovs_ctl stop
}
restart () {
# OVS_FORCE_RELOAD_KMOD can be set by package postinst script.
if [ "$1" = "--save-flows=yes" ] || \
[ "${OVS_FORCE_RELOAD_KMOD}" = "no" ]; then
start restart
elif [ "${OVS_FORCE_RELOAD_KMOD}" = "yes" ]; then
depmod -a
if [ -e /sys/module/openvswitch ]; then
LOADED_SRCVERSION=`cat /sys/module/openvswitch/srcversion`
LOADED_VERSION=`cat /sys/module/openvswitch/version`
elif [ -e /sys/module/openvswitch_mod ]; then
LOADED_SRCVERSION=`cat /sys/module/openvswitch_mod/srcversion`
LOADED_VERSION=`cat /sys/module/openvswitch_mod/version`
fi
SRCVERSION=`modinfo -F srcversion openvswitch 2>/dev/null`
VERSION=`modinfo -F version openvswitch 2>/dev/null`
ovs_ctl_log "Package upgrading:\n"\
"Loaded version: ${LOADED_VERSION} ${LOADED_SRCVERSION}.\n"\
"Version on disk: ${VERSION} ${SRCVERSION}."
# If the kernel module was previously loaded and it is different than
# the kernel module on disk, then do a 'force-reload-kmod'.
if [ -n "${LOADED_SRCVERSION}" ] && [ -n "${SRCVERSION}" ] && \
[ "${SRCVERSION}" != "${LOADED_SRCVERSION}" ]; then
start force-reload-kmod
else
start restart
fi
else
stop
start
fi
}
case $1 in
start)
start
;;
stop | force-stop)
stop
;;
reload | force-reload)
# The OVS daemons keep up-to-date.
;;
restart)
shift
restart "$@"
;;
status)
ovs_ctl status
exit $?
;;
force-reload-kmod)
start force-reload-kmod
;;
load-kmod)
load_kmod
;;
*)
echo "Usage: $0 {start|stop|restart|force-reload|status|force-stop|force-reload-kmod|load-kmod}" >&2
exit 1
;;
esac
exit 0