#!/bin/sh
#
# SAPDatabase
#
# Description:	Manages any type of SAP supported database instance
#               as a High-Availability OCF compliant resource.
#
# Author:       Alexander Krauth, October 2006
# Support:      liunx@sap.com
# License:      GNU General Public License (GPL)
# Copyright:    (c) 2006 Alexander Krauth
#
# An example usage: 
#      See usage() function below for more details...
#
# OCF instance parameters:
#	OCF_RESKEY_SID
#       OCF_RESKEY_DIR_EXECUTABLE   (optional, well known directories will be searched by default)
#       OCF_RESKEY_DBTYPE
#       OCF_RESKEY_NETSERVICENAME   (optional, non standard name of Oracle Listener)
#       OCF_RESKEY_DBJ2EE_ONLY      (optional, default is false)
#       OCF_RESKEY_DIR_BOOTSTRAP    (optional, if non standard J2EE server directory)
#       OCF_RESKEY_DIR_SECSTORE     (optional, if non standard J2EE secure store directory)
#
# ToDo:
# Remove all the database dependend stuff from the agent and use
# saphostcontrol daemon as soon as SAP will release it.
#
#######################################################################
# Initialization:

. ${OCF_ROOT}/resource.d/heartbeat/.ocf-shellfuncs

#######################################################################

SH=/bin/sh

usage() {
  methods=`sapdatabase_methods`
  methods=`echo $methods | tr ' ' '|'`
  cat <<-!
	usage: $0 ($methods)

	$0 manages a SAP database of any type as an HA resource.
        Currently Oracle, MaxDB and DB/2 UDB are supported.
        ABAP databases as well as JAVA only databases are supported.

	The 'start' operation starts the instance.
	The 'stop' operation stops the instance.
	The 'status' operation reports whether the instance is running
	The 'monitor' operation reports whether the instance seems to be working
	The 'validate-all' operation reports whether the parameters are valid
	The 'methods' operation reports on the methods $0 supports

	!
}

meta_data() {
	cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="SAPDatabase">
<version>1.2</version>

<longdesc lang="en">
Resource script for SAP databases. It manages a SAP database of any type as an HA resource.
</longdesc>
<shortdesc lang="en">SAP database resource agent</shortdesc>

<parameters>
 <parameter name="SID" unique="1" required="1">
  <longdesc lang="en">The unique SAP system identifier. e.g. P01</longdesc>
  <shortdesc lang="en">SAP system ID</shortdesc>
  <content type="string" default="" />
 </parameter>
 <parameter name="DIR_EXECUTABLE" unique="1" required="0">
  <longdesc lang="en">The full qualified path where to find sapstartsrv and sapcontrol.</longdesc>
  <shortdesc lang="en">path of sapstartsrv and sapcontrol</shortdesc>
  <content type="string" default="" />
 </parameter>
 <parameter name="DBTYPE" unique="1" required="1">
  <longdesc lang="en">The name of the database vendor you use. Set either: ORA,DB6,ADA</longdesc>
  <shortdesc lang="en">database vendor</shortdesc>
  <content type="string" default="" />
 </parameter>
 <parameter name="NETSERVICENAME" unique="1" required="0">
  <longdesc lang="en">The Oracle TNS listener name.</longdesc>
  <shortdesc lang="en">listener name</shortdesc>
  <content type="string" default="" />
 </parameter>
 <parameter name="DBJ2EE_ONLY" unique="1" required="0">
  <longdesc lang="en">If you do not have a ABAP stack installed in the SAP database, set this to TRUE</longdesc>
  <shortdesc lang="en">only JAVA stack installed</shortdesc>
  <content type="boolean" default="false"/>
 </parameter>
 <parameter name="DIR_BOOTSTRAP" unique="1" required="0">
  <longdesc lang="en">The full qualified path where to find the J2EE instance bootstrap directory. e.g. /usr/sap/P01/J00/j2ee/cluster/bootstrap</longdesc>
  <shortdesc lang="en">path to j2ee bootstrap directory</shortdesc>
  <content type="string" default="" />
 </parameter>
 <parameter name="DIR_SECSTORE" unique="1" required="0">
  <longdesc lang="en">The full qualified path where to find the J2EE security store directory. e.g. /usr/sap/P01/SYS/global/security/lib/tools</longdesc>
  <shortdesc lang="en">path to j2ee secure store directory</shortdesc>
  <content type="string" default="" />
 </parameter>
</parameters>

<actions>
<action name="start" timeout="1800" />
<action name="stop" timeout="1800" />
<action name="status" timeout="60" />
<action name="monitor" depth="0" timeout="60" interval="120" start-delay="180" />
<action name="validate-all" timeout="5" />
<action name="meta-data" timeout="5" />
<action name="methods" timeout="5" />
</actions>
</resource-agent>
END
}

trap_handler() {
  rm -f $TEMPFILE
  exit $OCF_ERR_GENERIC
}


#
# listener_start: Start the given listener
#
listener_start() {
  orasid="ora`echo $SID | tr [:upper:] [:lower:]`"
  rc=$OCF_SUCCESS
  output=`echo "lsnrctl start $NETSERVICENAME" | su - $orasid 2>&1`
  if [ $? -eq 0 ]
  then
    ocf_log info "Oracle Listener $NETSERVICENAME started: $output"
    rc=$OCF_SUCCESS
  else
    ocf_log err "Oracle Listener $NETSERVICENAME start failed: $output"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# listener_stop: Stop the given listener
#
listener_stop() {
  orasid="ora`echo $SID | tr [:upper:] [:lower:]`"
  rc=$OCF_SUCCESS
  if
      listener_status
  then
      : listener is running, trying to stop it later...
  else
      return $OCF_SUCCESS
  fi
  output=`echo "lsnrctl stop $NETSERVICENAME" | su - $orasid 2>&1`
  if [ $? -eq 0 ]
  then
    ocf_log info "Oracle Listener $NETSERVICENAME stopped: $output"
  else
    ocf_log err "Oracle Listener $NETSERVICENAME stop failed: $output"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# listener_status: is the given listener running?
#
listener_status() {
  orasid="ora`echo $SID | tr [:upper:] [:lower:]`"
  # Note: ps cuts off it's output at column $COLUMNS, so "ps -ef" can not be used here
  # as the output might be to long.
  cnt=`ps efo args --user $orasid | grep $NETSERVICENAME | grep -c tnslsnr`
  if [ $cnt -eq 1 ]
  then
    rc=$OCF_SUCCESS
  else
    ocf_log info "listener process not running for $NETSERVICENAME for $SID"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# x_server_start: Start the given x_server
#
x_server_start() {
  rc=$OCF_SUCCESS
  output=`echo "x_server start" | su - $sidadm 2>&1`
  if [ $? -eq 0 ]
  then
    ocf_log info "MaxDB x_server start: $output"
    rc=$OCF_SUCCESS
  else
    ocf_log err "MaxDB x_server start failed: $output"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# x_server_stop: Stop the x_server
#
x_server_stop() {
  rc=$OCF_SUCCESS
  output=`echo "x_server stop" | su - $sidadm 2>&1`
  if [ $? -eq 0 ]
  then
    ocf_log info "MaxDB x_server stop: $output"
  else
    ocf_log err "MaxDB x_server stop failed: $output"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# x_server_status: is the x_server running?
#
x_server_status() {
  sdbuser=`ls -ld /sapdb/$SID | awk '{print $3}'`
  # Note: ps cuts off it's output at column $COLUMNS, so "ps -ef" can not be used here
  # as the output might be to long.
  cnt=`ps efo args --user $sdbuser | grep -c vserver`
  if [ $cnt -eq 1 ]
  then
    rc=$OCF_SUCCESS
  else
    ocf_log info "x_server process not running"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# oracle_stop: Stop the Oracle database without any condition
#
oracle_stop() {
echo '#!/bin/sh
LOG=$HOME/stopdb.log
date > $LOG

if [ -x "${ORACLE_HOME}/bin/sqlplus" ]
then
    SRVMGRDBA_EXE="${ORACLE_HOME}/bin/sqlplus"
else
   echo "Can not find executable sqlplus" >> $LOG
   exit 1
fi

$SRVMGRDBA_EXE /NOLOG >> $LOG << !
connect / as sysdba
shutdown immediate
exit
!
rc=$?
cat $LOG
exit $rc' > $TEMPFILE

chmod 700 $TEMPFILE
chown $sidadm $TEMPFILE

su - $sidadm -c $TEMPFILE
retcode=$?
rm -f $TEMPFILE

if [ $retcode -eq 0 ]; then
  sapdatabase_status
  if [ $? -ne $OCF_NOT_RUNNING ]; then
    retcode=1
  fi
fi

return $retcode
}

#
# maxdb_stop: Stop the MaxDB database without any condition
#
maxdb_stop() {
if [ $DBJ2EE_ONLY -eq 1 ]; then
   userkey=c_J2EE
else
   userkey=c
fi

echo "#!/bin/sh
LOG=\$HOME/stopdb.log
date > \$LOG
echo \"Stop database with xuserkey >$userkey<\" >> \$LOG
dbmcli -U ${userkey} db_offline >> \$LOG 2>&1
exit \$?" > $TEMPFILE

chmod 700 $TEMPFILE
chown $sidadm $TEMPFILE

su - $sidadm -c $TEMPFILE
retcode=$?
rm -f $TEMPFILE

if [ $retcode -eq 0 ]; then
  sapdatabase_status
  if [ $? -ne $OCF_NOT_RUNNING ]; then
    retcode=1
  fi
fi

return $retcode
}

#
# db6udb_stop: Stop the DB2/UDB database without any condition
#
db6udb_stop() {
echo '#!/bin/sh
LOG=$HOME/stopdb.log
date > $LOG
echo "Shut down the database" >> $LOG
$INSTHOME/sqllib/bin/db2 deactivate database $DB2DBDFT |tee -a $LOG  2>&1
$INSTHOME/sqllib/adm/db2stop force |tee -a $LOG  2>&1
exit $?' > $TEMPFILE

chmod 700 $TEMPFILE
chown $sidadm $TEMPFILE

su - $sidadm -c $TEMPFILE
retcode=$?
rm -f $TEMPFILE

if [ $retcode -eq 0 ]; then
  sapdatabase_status
  if [ $? -ne $OCF_NOT_RUNNING ]; then
    retcode=1
  fi
fi

return $retcode
}

#
# methods: What methods/operations do we support?
#
sapdatabase_methods() {
  cat <<-!
	start
	stop
	status
	monitor
	validate-all
	methods
	meta-data
	usage
	!
}


#
# sapdatabase_start : Start the SAP database
#
sapdatabase_start() {
  case $DBTYPE in
    ADA) x_server_start
         ;;
    ORA) listener_start
         ;;
  esac

  output=`su - $sidadm -c $SAPSTARTDB`
  if [ $? -eq 0 ]
  then
    ocf_log info "SAP database $SID started: $output"
    rc=$OCF_SUCCESS
  else
    ocf_log err "SAP database $SID start failed: $output"
    rc=$OCF_ERR_GENERIC
  fi
  return $rc
}

#
# sapdatabase_stop: Stop the SAP database
#
sapdatabase_stop() {

  # use of the stopdb kernel script is not possible, because there are to may checks in that
  # script. We want to stop the database regardless of anything.
  #output=`su - $sidadm -c $SAPSTOPDB`

  case $DBTYPE in
    ORA) output=`oracle_stop`
         ;;
    ADA) output=`maxdb_stop`
         ;;
    DB6) output=`db6udb_stop`
         ;;
  esac

  if [ $? -eq 0 ]
  then
    ocf_log info "SAP database $SID stopped: $output"
    rc=$OCF_SUCCESS
  else
    ocf_log err "SAP database $SID stop failed: $output"
    rc=$OCF_ERR_GENERIC
  fi

  case $DBTYPE in
    ORA) listener_stop
         ;;
    ADA) x_server_stop
         ;;
  esac
  return $rc
}


#
# sapdatabase_monitor: Can the given database instance do anything useful?
#
sapdatabase_monitor() {
  rc=$OCF_SUCCESS

  case $DBTYPE in
    ADA) x_server_status 
         if [ $? -ne $OCF_SUCCESS ]; then x_server_start; fi
         ;;
    ORA) listener_status
         if [ $? -ne $OCF_SUCCESS ]; then listener_start; fi
         ;;
  esac

  if [ $DBJ2EE_ONLY -eq 0 ]
  then
    output=`echo "$SAPDBCONNECT -d -w /dev/null" | su $sidadm 2>&1`
    if [ $? -le 4 ]
    then
      rc=$OCF_SUCCESS
    else
      rc=$OCF_NOT_RUNNING
    fi
  else
    DB_JARS=""
    if [ -f "$BOOTSTRAP"/bootstrap.properties ]; then
      DB_JARS=`cat $BOOTSTRAP/bootstrap.properties | grep -i rdbms.driverLocation | sed -e 's/\\\:/:/g' | awk -F= '{print $2}'`
    fi
    IAIK_JCE="$SECSTORE"/iaik_jce.jar
    IAIK_JCE_EXPORT="$SECSTORE"/iaik_jce_export.jar
    EXCEPTION="$BOOTSTRAP"/exception.jar
    LOGGING="$BOOTSTRAP"/logging.jar
    OPENSQLSTA="$BOOTSTRAP"/opensqlsta.jar
    TC_SEC_SECSTOREFS="$BOOTSTRAP"/tc_sec_secstorefs.jar
    JDDI="$BOOTSTRAP"/../server0/bin/ext/jdbdictionary/jddi.jar
    ANTLR="$BOOTSTRAP"/../server0/bin/ext/antlr/antlr.jar
    FRAME="$BOOTSTRAP"/../server0/bin/system/frame.jar

    # only start jdbcconnect when all jars available
    if [ -f "$EXCEPTION" -a -f "$LOGGING" -a -f "$OPENSQLSTA" -a -f "$TC_SEC_SECSTOREFS" -a -f "$JDDI" -a -f "$ANTLR" -a -f "$FRAME" -a -f "$SAPDBCONNECT" ]
    then
      output=`eval java -cp ".:$FRAME:$ANTLR:$JDDI:$IAIK_JCE_EXPORT:$IAIK_JCE:$EXCEPTION:$LOGGING:$OPENSQLSTA:$TC_SEC_SECSTOREFS:$DB_JARS:$SAPDBCONNECT" com.sap.inst.jdbc.connect.JdbcCon -sec $SID:$SID`
      if [ $? -le 0 ]
      then
        rc=$OCF_SUCCESS
      else
        rc=$OCF_NOT_RUNNING
      fi
    else
      output="Cannot find all jar files needed for database monitoring."
      rc=$OCF_ERR_GENERIC
    fi
  fi

  if [ $rc -ne $OCF_SUCCESS ]
  then
    ocf_log err "The SAP database $SID ist not running: $output"
  fi
  return $rc
}


#
# sapdatabase_status: Are there any database processes on this host ?
#
sapdatabase_status() {
  case $DBTYPE in
    ADA) SEARCH="$SID/db/pgm/kernel"
         SUSER=`ls -ld /sapdb/$SID | awk  '{print $3}'`
         SNUM=2
         ;;
    ORA) SEARCH="ora_[a-z][a-z][a-z][a-z]_"
         SUSER="ora`echo $SID | tr [:upper:] [:lower:]`"
         SNUM=4
         ;;
    DB6) SEARCH="db2[a-z][a-z][a-z][a-z][a-z]"
         SUSER="db2`echo $SID | tr [:upper:] [:lower:]`"
         SNUM=5
         ;;
  esac

  # Note: ps cuts off it's output at column $COLUMNS, so "ps -ef" can not be used here
  # as the output might be to long.
  cnt=`ps efo args --user $SUSER | grep -c "$SEARCH"`
  if [ $cnt -ge $SNUM ]
  then
    rc=$OCF_SUCCESS
  else
    # ocf_log info "Database Instance $SID is not running on `hostname`"
    rc=$OCF_NOT_RUNNING
  fi
  return $rc
}


#
# sapdatabase_vaildate: Check the symantic of the input parameters 
#
sapdatabase_vaildate() {
  rc=$OCF_SUCCESS
  if [ `echo "$SID" | grep -c '^[A-Z][A-Z0-9][A-Z0-9]$'` -ne 1 ]
  then
    ocf_log err "Parsing parameter SID: '$SID' is not a valid system ID!"
    rc=$OCF_ERR_ARGS
  fi

  case "$DBTYPE" in
   ORA|ADA|DB6) ;;
   *) ocf_log err "Parsing parameter DBTYPE: '$DBTYPE' is not a supported database type!"
      rc=$OCF_ERR_ARGS ;;
  esac

  return $rc
}


#
#	'main' starts here...
#

if
  ( [ $# -ne 1 ] )
then
  usage
  exit $OCF_ERR_ARGS
fi

# Set a tempfile and make sure to clean it up again
TEMPFILE="/tmp/SAPDatabase.tmp"
trap trap_handler INT TERM

# These operations don't require OCF instance parameters to be set
case "$1" in
  meta-data)	meta_data
		exit $OCF_SUCCESS;;

  usage) 	usage
		exit $OCF_SUCCESS;;

  methods)	sapdatabase_methods
		exit $?;;

  *);;
esac

US=`id -u -n`
US=`echo $US`
if
  [ $US != root  ]
then
  ocf_log err "$0 must be run as root"
  exit $OCF_ERR_PERM
fi

# mandatory parameter check
if  [ -z "$OCF_RESKEY_SID" ]; then
  ocf_log err "Please set OCF_RESKEY_SID to the SAP system id!"
  exit $OCF_ERR_ARGS
fi
SID=`echo "$OCF_RESKEY_SID"`

if [ -z "$OCF_RESKEY_DBTYPE" ]; then
  ocf_log err "Please set OCF_RESKEY_DBTYPE to the database vendor specific tag (ORA,ADA,DB6)!"
  exit $OCF_ERR_ARGS
fi
DBTYPE="$OCF_RESKEY_DBTYPE"

# optional OCF parameters, we try to guess which directories are correct
EXESTARTDB="startdb"
EXESTOPDB="stopdb"
EXEDBCONNECT="R3trans"
if [ -z "$OCF_RESKEY_DBJ2EE_ONLY" ]; then
  DBJ2EE_ONLY=0
else
  case "$OCF_RESKEY_DBJ2EE_ONLY" in
   1|true|TRUE|yes|YES) DBJ2EE_ONLY=1
                        EXESTARTDB="startj2eedb"
                        EXESTOPDB="stopj2eedb"
                        EXEDBCONNECT="jdbcconnect.jar"
                        ;;
   0|false|FALSE|no|NO) DBJ2EE_ONLY=0;;
   *) ocf_log err "Parsing parameter DBJ2EE_ONLY: '$DBJ2EE_ONLY' is not a boolean value!"
      exit $OCF_ERR_ARGS ;;
  esac
fi

if [ -z "$OCF_RESKEY_NETSERVICENAME" ]; then
  case "$DBTYPE" in
    ORA|ora) NETSERVICENAME="LISTENER";;
    *)       NETSERVICENAME="";;
  esac
else
  NETSERVICENAME="$OCF_RESKEY_NETSERVICENAME"
fi

PATHLIST="
$OCF_RESKEY_DIR_EXECUTABLE
/usr/sap/$SID/*/exe
/usr/sap/$SID/SYS/exe/run
/sapmnt/$SID/exe
"
DIR_EXECUTABLE=""
for EXEPATH in $PATHLIST
do
  SAPSTARTDB=`which $EXEPATH/$EXESTARTDB 2> /dev/null`
  if [ $? -eq 0 ]
  then
    MYPATH=`echo "$SAPSTARTDB" | head -1`
    MYPATH=`dirname "$MYPATH"`
    if [ -x $MYPATH/$EXESTARTDB -a -x $MYPATH/$EXESTOPDB -a -x $MYPATH/$EXEDBCONNECT ]
    then
      DIR_EXECUTABLE=$MYPATH
      SAPSTARTDB=$MYPATH/$EXESTARTDB
      SAPSTOPDB=$MYPATH/$EXESTOPDB
      SAPDBCONNECT=$MYPATH/$EXEDBCONNECT
      break
    fi
  fi
done
LSB_STATUS_STOPPED=3
if [ -z "$DIR_EXECUTABLE" ]
then
  [ "$1" = stop ] && exit $OCF_SUCCESS
  [ "$1" = monitor ] && exit $OCF_NOT_RUNNING
  [ "$1" = status ] && exit $LSB_STATUS_STOPPED
  ocf_log err "Cannot find $EXESTARTDB,$EXESTOPDB and $EXEDBCONNECT executable, please set DIR_EXECUTABLE parameter!"
  exit $OCF_ERR_GENERIC
fi

if [ $DBJ2EE_ONLY -eq 1 ]
then
  if [ -n "$OCF_RESKEY_DIR_BOOTSTRAP" ]
  then
    BOOTSTRAP="$OCF_RESKEY_DIR_BOOTSTRAP"
  else
    BOOTSTRAP=`echo /usr/sap/$SID/*/j2ee/cluster/bootstrap | head -1`
  fi

  if [ -n "$OCF_RESKEY_DIR_SECSTORE" ]
  then
    SECSTORE="$OCF_RESKEY_DIR_SECSTORE"
  else
    SECSTORE=/usr/sap/$SID/SYS/global/security/lib/tools
  fi
fi

# as root user we need the library path to the SAP kernel to be able to call executables
if [ `echo $LD_LIBRARY_PATH | grep -c "^$DIR_EXECUTABLE\>"` -eq 0 ]; then
  LD_LIBRARY_PATH=$DIR_EXECUTABLE:$LD_LIBRARY_PATH; export LD_LIBRARY_PATH
fi
sidadm="`echo $SID | tr [:upper:] [:lower:]`adm"

# What kind of method was invoked?
case "$1" in

  start)	sapdatabase_start
		exit $?;;

  stop)		sapdatabase_stop
		exit $?;;

  monitor)
          	sapdatabase_monitor
		exit $?;;

  status)
                sapdatabase_status
                exit $?;;

  validate-all)	sapdatabase_vaildate
		exit $?;;

  *)		sapdatabase_methods
		exit $OCF_ERR_UNIMPLEMENTED;;
esac
