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#!/bin/sh
# Start/stop/restart openvswitch.

# To start Open vSwitch automatically at boot, be sure this script is
# executable:
#
#   % chmod 755 /etc/rc.d/rc.openvswitch

# Before you can run Open vSwitch daemon, you must have a database.  To
# install one, perform the following as root:
#
#   % /etc/rc.d/rc.openvswitch clean-database
#

DBCONF=/etc/openvswitch/ovs-vswitchd.conf.db
SOCKET=/var/run/openvswitch/db.sock
VSPID=/var/run/openvswitch/ovs-vswitchd.pid
DBPID=/var/run/openvswitch/ovsdb-server.pid

# Insert kernel driver for Open vSwitch:
/sbin/modprobe openvswitch

# Insert kernel driver for VLANs:
/sbin/modprobe 8021q

# Start openvswitch:
openvswitch_start() {
  echo "Starting openvswitch:  /etc/rc.d/rc.openvswitch"
  /usr/sbin/ovsdb-server /etc/openvswitch/ovs-vswitchd.conf.db --remote=punix:$SOCKET \
    --detach --pidfile=$DBPID --verbose=ANY:ANY:err
  /usr/bin/ovs-vsctl --no-wait --verbose=ANY:ANY:err init
  /usr/sbin/ovs-vswitchd unix:$SOCKET --detach --pidfile=$VSPID --verbose=ANY:ANY:err
}

# Stop openvswitch:
openvswitch_stop() {
  echo "Stopping openvswitch:  /etc/rc.d/rc.openvswitch"
  if [ -e $VSPID ]; then
    pid=$(cat $VSPID)
    /usr/bin/ovs-appctl -t /var/run/openvswitch/ovs-vswitchd.$pid.ctl exit
  fi
  if [ -e $DBPID ]; then
    pid=$(cat $DBPID)
    /usr/bin/ovs-appctl -t /var/run/openvswitch/ovsdb-server.$pid.ctl exit
  fi
}

# Clean openvswitch:
openvswitch_clean() {
  if [ ! -e $DBPID ] && [ ! -e $VSPID ]; then
    rm -f $DBCONF
    /usr/bin/ovsdb-tool create $DBCONF /usr/share/openvswitch/vswitch.ovsschema
  else
    echo "Stop openvswitch first!"
  fi
}

case "$1" in
  'start')
    openvswitch_start
  ;;
  'stop')
    openvswitch_stop
  ;;
  'restart')
    openvswitch_stop
    sleep 1
    openvswitch_start
  ;;
  'clean-database')
    openvswitch_clean
  ;;
  'start-clean')
    openvswitch_clean
    sleep 1
    openvswitch_start
  ;;
  'restart-clean')
    openvswitch_stop
    sleep 1
    openvswitch_clean
    sleep 1
    openvswitch_start
  ;;
  *)
    echo "Usage $0 start|stop|restart|clean-database|start-clean|restart-clean"
esac