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#!/bin/bash
#Copyright (c) 2009 Eucalyptus Systems, Inc.
#
#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, only version 3 of the License.
#
#This file is distributed in the hope that it will be useful, but WITHOUT
#ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
#for more details.
#
#You should have received a copy of the GNU General Public License along
#with this program. If not, see <http://www.gnu.org/licenses/>.
#
#Please contact Eucalyptus Systems, Inc., 130 Castilian
#Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
#if you need additional information or have any questions.
#
#This file may incorporate work covered under the following copyright and
#permission notice:
#
# Software License Agreement (BSD License)
#
# Copyright (c) 2008, Regents of the University of California
#
#
# Redistribution and use of this software in source and binary forms, with
# or without modification, are permitted provided that the following
# conditions are met:
#
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
# OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. USERS OF
# THIS SOFTWARE ACKNOWLEDGE THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE
# LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
# SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
# IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
# BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
# THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
# OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO IDENTIFIED, OR
# WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT NEEDED TO COMPLY WITH
# ANY SUCH LICENSES OR RIGHTS.
#

#
# Init script for the Eucalyptus node controller.
#
# chkconfig: 2345 99 05
# description: script for starting and stopping eucalyptus node controller
#
### BEGIN INIT INFO
# Provides: eucalyptus-nc
# Required-Start: $remote_fs $syslog libvirtd
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start Eucalyptus node controller
# Description: Start the Eucalyptus node controller
### END INIT INFO
#

# Do NOT "set -e"

# if we have lsb functions let's source them
WE_HAVE_LSB="N"
if [ -e /lib/lsb/init-functions ]; then
. /lib/lsb/init-functions
# very old lsb don't have the functions we need
if type log_daemon_msg > /dev/null 2> /dev/null ; then
WE_HAVE_LSB="Y"
fi
fi

if [ "$EUID" != "0" ]; then
    echo "Eucalyptus init scritps must be run as root."
    exit 1
fi

# I just wanted to set PATH to be the system PATH, but if a user install
# eucalyptus manually, it may have binaries in a non-standard position:
# hence we need to keep the PATH we receive.
export PATH=/sbin:/usr/sbin:/bin:/usr/bin:$PATH
DESC="Eucalyptus services"
NAME=eucalyptus-nc
BRCTL="`which brctl 2> /dev/null`"
MODPROBE="`which modprobe 2> /dev/null`"
EUCA_USER="eucalyptus"

# honor the ENV variable if found otherwise look in root
if [ -z "$EUCALYPTUS" ] ; then
       EUCALYPTUS="@prefix@"
       if [ ! -e ${EUCALYPTUS}/etc/eucalyptus/eucalyptus.conf ] ; then
              EUCALYPTUS="/"
       fi
fi
export EUCALYPTUS

create_httpd_config() {
IPS="all"

# let's configure the common parts for both CC and NC
cat $EUCALYPTUS/etc/eucalyptus/httpd.conf |sed "s|EUCALYPTUS|$EUCALYPTUS|"|sed "s|AXIS2C_HOME|$AXIS2C_HOME|"|sed "s|\(ServerRoot\).*|\1 "$HTTPD_HOME"|" |sed "s|EUCA_USER|$EUCA_USER|" > $EUCALYPTUS/etc/eucalyptus/httpd-tmp.conf

# load authz if we have it (ubuntu needs it)
if [ -e $HTTPD_HOME/usr/lib/apache2/modules/mod_authz_host.so ]; then
echo "LoadModule authz_host_module /usr/lib/apache2/modules/mod_authz_host.so" >> $EUCALYPTUS/etc/eucalyptus/httpd-tmp.conf
fi

# let's configure the NC
cat $EUCALYPTUS/etc/eucalyptus/httpd-tmp.conf |sed "s|\(Listen\).*|\1 $NC_PORT|"|sed "s|\(PidFile\).*|\1 $EUCALYPTUS/var/run/eucalyptus/eucalyptus-nc.pid|"|sed "s|\(Allow from\).*|\1 $IPS|"|sed "s|\(ErrorLog\).*|\1 $EUCALYPTUS/var/log/eucalyptus/httpd-nc_error_log|" > $EUCALYPTUS/etc/eucalyptus/httpd-nc.conf
}

# crude way to start the axis2c services
do_start() {
# fixes #469984
IPTABLES="`which iptables 2> /dev/null`"
if [ -n "$IPTABLES" ]; then
[ -x $IPTABLES ] && $IPTABLES -L -n > /dev/null 2> /dev/null
fi

if [ ! -x $HTTPD ]; then
echo
echo "cannot find httpd (was set to <$HTTPD>)!"
exit 1
fi
if [ ! -x $EUCALYPTUS/usr/sbin/euca_conf ]; then
echo "Some eucalyptus components are missing"
exit 1
fi

if ! $EUCALYPTUS/usr/sbin/euca_conf --check nc ; then
exit 1
fi

# we have a program to test the hypervisor and more for the NC
if [ ! -x $EUCALYPTUS/usr/sbin/euca_test_nc ]; then
echo
echo "Cannot check Node Controller: missing euca_test_nc."
elif ! $EUCALYPTUS/usr/sbin/euca_test_nc $HYPERVISOR > $EUCALYPTUS/var/log/eucalyptus/euca_test_nc.log 2>&1 ; then
echo
echo "Node Controller cannot be started: errors in $EUCALYPTUS/var/log/eucalyptus/euca_test_nc.log"
exit 1
fi

# on SYSTEM or STATIC mode the bridge needs to exists
if [ "$VNET_MODE" = "SYSTEM" -o "$VNET_MODE" = "STATIC" ]; then
if [ -n "$BRCTL" -a -x $BRCTL ]; then
if ! $BRCTL show |grep $VNET_BRIDGE > /dev/null 2> /dev/null ; then
echo
echo "Warning! Cannot find bridge $VNET_BRIDGE: instances may be without net"
fi
fi
fi

# we need aoe loaded
if [ -z "$MODPROBE" ]; then
echo
echo "Cannot find modprobe: you may have problems."
elif ! $MODPROBE aoe ; then
echo
echo "Failed to load aoe: you may experience problems"
fi

# we need IP forwarding and we need to use iptable over the bridge
if [ -w /proc/sys/net/ipv4/ip_forward ]; then
VAL=`cat /proc/sys/net/ipv4/ip_forward`
if [ "$VAL" = "0" ]; then
echo
echo "Enabling IP forwarding for eucalyptus."
echo -n 1 > /proc/sys/net/ipv4/ip_forward
fi
fi
if [ -w /proc/sys/net/bridge/bridge-nf-call-iptables ]; then
VAL=`cat /proc/sys/net/bridge/bridge-nf-call-iptables`
if [ "$VAL" = "0" ]; then
echo
echo "Enabling bridge netfiltering for eucalyptus."
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
fi
fi

# let's be sure we have the right port for NC and CC
create_httpd_config

if ! $HTTPD -f $EUCALYPTUS/etc/eucalyptus/httpd-nc.conf ; then
echo
echo "Failed to start the NC!"
exit 1
fi
}

do_status() {
pidfile=$EUCALYPTUS/var/run/eucalyptus/eucalyptus-nc.pid
if [ -s $pidfile ]; then
pid=`cat $pidfile 2> /dev/null`
if ps axww|grep $pid|grep httpd-nc.conf > /dev/null ; then
# we are good
return 0
fi
fi
return 1
}

do_stop() {
pidfile=$EUCALYPTUS/var/run/eucalyptus/eucalyptus-nc.pid

# let's be sure we are killing the right process
if ! do_status ; then
rm -f $pidfile
return
fi

# now kill the services
if [ -s $pidfile ]; then
pid=`cat $pidfile 2> /dev/null`
kill $pid > /dev/null 2>&1
else
return
fi
timeout=5
while [ $timeout -gt 0 ]; do
if ps $pid > /dev/null 2>&1 ; then
sleep 1
timeout=$(($timeout - 1))
else
break
fi
done
if [ $timeout -eq 0 ]; then
kill -9 $pid > /dev/null 2>&1
fi
rm -f $pidfile
}

# Read configuration variable file if it is present
if [ -r $EUCALYPTUS/etc/eucalyptus/eucalyptus.conf ]; then
. $EUCALYPTUS/etc/eucalyptus/eucalyptus.conf
else
echo "Cannot find eucalyptus configuration file!"
exit 1
fi
if [ "$EUCALYPTUS" = "not_configured" ]; then
echo "EUCALYPTUS not configured!"
exit 1
fi

# let's see how many loop devices we have available
LOOP_AVL="`/bin/ls /dev/loop* 2> /dev/null|wc -l`"
if [ -z "$LOOP_AVL" -o "$LOOP_AVL" = "0" ]; then
echo "Couldn't find loop devices (/dev/loop*): expect problems"
elif [ $LOOP_AVL -lt 32 ]; then
echo "You should have at least 32 loop devices"
fi

if [ -z "$EUCA_USER" ] ; then
EUCA_USER="root"
fi

# let's try to pick the system apache2
HTTPD="`which apache2 2> /dev/null`" # .deb based machines
if [ -z "$HTTPD" ]; then
HTTPD="`which httpd 2> /dev/null`" # .rpm based machines
fi
if [ -z "$HTTPD" ]; then
HTTPD="`which httpd2 2> /dev/null`" # newer .rpm based machines
fi
HTTPD_HOME="/"

# let's find our dependencies
for y in $EUCALYPTUS/opt $EUCALYPTUS/packages $EUCALYPTUS /opt ; do
for x in `/bin/ls $y 2> /dev/null`; do
# this is for the RPM installed pacakges
if [ "$x" = "euca-axis2c" ]; then
if [ -e $y/$x/lib/libmod_axis2.so ]; then
export AXIS2C_HOME="$y/$x"
fi
fi
# this is for system or source installed
if [ "`echo $x | cut -f 1 -d -`" = "axis2c" ]; then
if [ -e $y/$x/lib/libmod_axis2.so ]; then
export AXIS2C_HOME="$y/$x"
fi
fi
done
done

# if we didn't find AXIS2C we'll pick the one we used at configuration
# time
if [ -z "$AXIS2C_HOME" ]; then
export AXIS2C_HOME="@AXIS2C_HOME@"
fi

# finally let's check the path
if [ ! -d "$AXIS2C_HOME" ]; then
echo "Cannot find AXIS2C_HOME?"
exit 1
fi

# do we have the httpd daemon?
if [ -z "${HTTPD}" ]; then
echo "apache2/httpd daemon not found!"
exit 1
fi

# set the library path correctly
export LD_LIBRARY_PATH="$AXIS2C_HOME/lib:$AXIS2C_HOME/modules/rampart:$EUCALYPTUS/usr/lib/eucalyptus:$LD_LIBRARY_PATH"

case "$1" in
  start)
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_daemon_msg "Starting $DESC" "$NAME"
else
echo -n "Starting $DESC: "
fi
fi

# let's check there is no previous NC running
if do_status ; then
echo
echo "another NC is already running!"
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 1
fi
fi
exit 1
fi

rm -f /dev/shm/sem.eucalyptus-nc* /dev/shm/sem.eucalyptus-st*
do_start
case "$?" in
0|1)
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 0
else
echo "done."
fi
fi
;;
*)
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 1
else
echo "failed!"
fi
fi
;;
esac
;;
  stop)
if [ "$VERBOSE" != no ]; then
        if [ "$WE_HAVE_LSB" = "Y" ]; then
log_begin_msg "Stopping $DESC"
else
echo -n "Stopping $DESC: "
                fi
        fi
do_stop
rm -f /dev/shm/sem.eucalyptus-nc* /dev/shm/sem.eucalyptus-st*
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 0
else
echo "done."
fi
fi
;;
  restart)
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_begin_msg "Restarting $DESC"
else
echo -n "Restarting $DESC: "
fi
fi
# restart allow the CC to mantain the state across restart
do_stop
do_start
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 0
else
echo "done."
fi
fi
   ;;
  status)
if do_status ; then
echo "NC is running"
else
exit 3
fi
;;
  config)
echo "EUCALYPTUS=${EUCALYPTUS}"
echo "AXIS2C_HOME=${AXIS2C_HOME}"
echo "HTTPD_HOME=${HTTPD_HOME}"
echo "HTTPD=${HTTPD}"
        ;;

  *)
echo "Usage: $NAME {start|stop|restart}" >&2
exit 3
;;
esac

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