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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.
#

#
# chkconfig: 2345 99 05
# description: script for starting and stopping eucalyptus java ws services
#
### BEGIN INIT INFO
# Provides: eucalyptus
# Required-Start: $remote_fs $syslog
# Should-Start: START
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start Eucalyptus
# Description: Start the Eucalyptus services
# X-UnitedLinux-Default-Enabled: yes
### END INIT INFO
#

# Do NOT "set -e"

# we need to source the current path in case of manual intallation
export PATH=/sbin:/usr/sbin:/bin:/usr/bin:$PATH
DESC="Eucalyptus services"
NAME=""
ANT="`which ant 2> /dev/null`"
JAVA="`which java 2> /dev/null`"
EUCA_USER="eucalyptus"

# available services
WALRUS_WS="N"
CLOUD_WS="N"
STORAGE_WS="N"

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

# 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

# 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

# Read configuration variable file if it is present
if [ -r $EUCALYPTUS/etc/eucalyptus/eucalyptus.conf ]; then
EUCA_TMP="`readlink -f ${EUCALYPTUS}`"
. $EUCALYPTUS/etc/eucalyptus/eucalyptus.conf

# has eucalyptus been configured?
if [ "$EUCALYPTUS" = "not_configured" ]; then
echo "EUCALYPTUS not configured!"
exit 1
fi

# there may be inconsistencied between conf file and env variable
if [ "$EUCA_TMP" != "`readlink -f ${EUCALYPTUS}`" ]; then
echo "Warning: you should check EUCALYPTUS in conf file"
fi
else
# on removal of RPM we can get in a state in which the conf file
# is gone but the services are still running: make this hard
# failure only if we are not stopping
echo "Cannot find eucalyptus configuration file!"
if [ "$1" != "stop" ]; then
exit 1
fi
fi
export EUCALYPTUS

pidfile=$EUCALYPTUS/var/run/eucalyptus/eucalyptus-cloud.pid

# read in the services which should be running
read_ws_list() {
STORAGE_WS="N"
WALRUS_WS="N"
VMWAREBROKER_WS="N"
CLOUD_WS="N"
NAME=""

for x in `cat $EUCALYPTUS/var/lib/eucalyptus/services 2> /dev/null` ; do
case $x in
walrus)
WALRUS_WS="Y"
NAME="walrus $NAME"
;;
sc)
STORAGE_WS="Y"
NAME="sc $NAME"
;;
vmwarebroker)
VMWAREBROKER_WS="Y"
NAME="vmwarebroker $NAME"
;;
cloud)
CLOUD_WS="Y"
NAME="cloud $NAME"
;;
*)
echo "Unknown service! ($x)"
;;
esac
done
}

check_java() {
java_min_version="1.6.0"

# we need a good JAVA_HOME
if [ -z "$JAVA_HOME" ]; then
# user didn't setup JAVA_HOME, let's look for it
if [ -z "$JAVA" ]; then
echo "Cannot find java!"
exit 1
fi
JAVA_HOME="`readlink -f $JAVA`"
JAVA_HOME="`dirname $JAVA_HOME|sed 's:/jre/bin::'`"
if [ ! -d $JAVA_HOME ]; then
echo "Cannot find a good JAVA_HOME"
exit 1
fi
fi

# to be sure we are using the right java/JAVA_HOME
JAVA="$JAVA_HOME/jre/bin/java"

# let's see if we can find a decent java
if [ -x "$JAVA" ]; then
java_version=`$JAVA -version 2>&1 | grep "java version" | sed -e 's/.*java version "\(.*\)".*/\1/'`
if [ `expr $java_version "<" $java_min_version` -eq 0 ]; then
export JAVA_HOME
return
fi
fi

echo "Eucalyptus needs java version >= $java_min_version"
exit 1
}

do_start() {
if [ -z "$CLOUD_OPTS" ]; then
local CLOUD_OPTS="--log-level=INFO"
fi

# basic checks
if [ ! -x $EUCALYPTUS/usr/sbin/euca_conf ]; then
echo "Some eucalyptus components are missing"
exit 1
fi

check_java

cd $EUCALYPTUS/etc/eucalyptus

# options from the configuration file
if [ "$DISABLE_DNS" != "N" ]; then
CLOUD_OPTS="$CLOUD_OPTS --remote-dns"
fi
if [ "$DISABLE_EBS" = "Y" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-storage"
fi
if [ "$DISABLE_ISCSI" != "N" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-iscsi"
fi

# enabled services
if [ "$STORAGE_WS" != "Y" ]; then
if [ "$DISABLE_EBS" != "Y" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-storage"
fi
else
if [ "$DISABLE_EBS" = "Y" ]; then
echo "DISABLE_EBS is set in eucalyptus.conf: not starting the sc"
else
if ! $EUCALYPTUS/usr/sbin/euca_conf --check sc ; then
exit 1
fi
fi
fi
if [ "$WALRUS_WS" != "Y" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-walrus"
else
if ! $EUCALYPTUS/usr/sbin/euca_conf --check walrus ; then
exit 1
fi
fi
if [ "$VMWAREBROKER_WS" != "Y" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-vmwarebroker"
else
     if ! $EUCALYPTUS/usr/sbin/euca_conf --check vmwarebroker ; then
exit 1
fi
if ! $EUCALYPTUS/usr/lib/eucalyptus/euca_imager fsck ; then
exit 1
fi
fi
if [ "$CLOUD_WS" != "Y" ]; then
CLOUD_OPTS="$CLOUD_OPTS --disable-cloud"
else
if ! $EUCALYPTUS/usr/sbin/euca_conf --check cloud ; then
exit 1
fi
fi

if [ "${STORAGE_WS}${CLOUD_WS}${WALRUS_WS}${VMWAREBROKER_WS}" = "NNNN" ]; then
# nothing to start
NAME="none"
return 0
fi

    # try log4j for a bit, see if anyone panics. $EUCALYPTUS/usr/sbin/eucalyptus-cloud $CLOUD_OPTS -h $EUCALYPTUS -u $EUCA_USER --pidfile ${pidfile} -f -o $EUCALYPTUS/var/log/eucalyptus/cloud-output.log >/dev/null 2>&1
ulimit -n 4096
$EUCALYPTUS/usr/sbin/eucalyptus-cloud $CLOUD_OPTS -h $EUCALYPTUS -u $EUCA_USER --pidfile ${pidfile} -f -L console-log >/dev/null 2>&1

return $?
}

do_status() {
if [ -s ${pidfile} ]; then
pid=`cat ${pidfile} 2> /dev/null`
if ! ps axww|grep $pid|grep eucalyptus-cloud.pid > /dev/null; then
# pid file is not matching
rm -f ${pidfile}
return 1
fi
else
# no pidfile, no running services
return 1
fi

return $?
}

do_stop() {
# now stop the service
if [ -s "${pidfile}" ]; then
pid=`cat $pidfile 2> /dev/null`
kill $pid > /dev/null 2>&1
else
return
fi

# let's way few seconds than kill harder
timeout=20
while [ $timeout -gt 0 ]; do
if do_status ; then
sleep 1
timeout=$(($timeout - 1))
else
break
fi
done
if [ $timeout -eq 0 ]; then
kill -9 $pid > /dev/null 2>&1
fi
rm -f $pidfile

}

# let's get the user to use
if [ -z "$EUCA_USER" ] ; then
EUCA_USER="root"
fi

# set the library path correctly
export VDDK_HOME="@VDDK_HOME@"
export LD_LIBRARY_PATH="$EUCALYPTUS/usr/lib/eucalyptus:$VDDK_HOME/lib:$VDDK_HOME/lib/vmware-vix-disklib/lib32:$VDDK_HOME/lib/vmware-vix-disklib/lib64/:$LD_LIBRARY_PATH" # to ensure euca_imager finds VDDK libs
export PATH="$EUCALYPTUS/usr/lib/eucalyptus:$PATH" # to ensure euca_imager has euca_rootwrap

#VERBOSE="yes"

# read services to start
read_ws_list

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: $NAME"
fi
fi

# let's check there is no previous cloud running
if do_status ; then
echo
echo "another $DESC is already running!"
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 1
fi
fi
exit 0
fi

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_daemon_msg "Stopping $DESC" "$NAME"
else
echo -n "Stopping $DESC: $NAME"
fi
fi

# let's check there is a previous cloud running
if ! do_status ; then
echo
echo "no $DESC is running!"
if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 1
fi
fi
exit 0
fi

do_stop

if [ "$VERBOSE" != no ]; then
if [ "$WE_HAVE_LSB" = "Y" ]; then
log_end_msg 0
else
echo "done."
fi
fi
;;
  restart)
$0 stop
$0 start
   ;;
  status)
if do_status ; then
echo "$DESC ($NAME) is/are running"
else
exit 3
fi
;;
  *)
echo "Usage: $0 {start|stop|restart}" >&2
exit 3
;;
esac

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