[Nagiosplug-devel] improved check_oracle

[Philip Brown]

Improved version of check_oracle attached.

Allows actually logging in as a user, and doing
 select * from dual;
which is a lot more definitive in saying "oracle is working", than
either checking the listener, or seeing if the oracle process is running.


new added syntax:

check_oracle --oralogin user/pw at ora.name


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#! /bin/sh
#
# made by latigid010 at yahoo.com
# 01/06/2000
#
#  This Nagios plugin was created to check remote or local TNS
#  status and check local Database status.
#
# Updated by Philip Brown to allow doing a login with
#  specified oracle loginstring, and do "select * from dual;"
#
#  Sample configuration to add to checkcommands.cfg:
#         command[check-oracle-tns]=/usr/local/nagios/libexec/check_oracle --tns $ARG$
#         command[check-oracle-ps]=/usr/local/nagios/libexec/check_oracle --db $ARG$
#         command[check-oracle-login]=/usr/local/nagios/libexec/check_oracle --oralogin $ARG$
#
#
# Usage: 
#  (See print_usage() function)
#
# I have the script checking for the Oracle PMON process and 
# the sgadefORACLE_SID.dbf file.
# 
#
# If you have any problems check that you have the $ORACLE_HOME
# enviroment variable set.
# The script will adjust its PATH and LD_LIBRARY_PATH based on that.
# Dont forget about your tnsnames.ora file.
# When checking Local Database status your ORACLE_SID is case sensitive.
#


# You may want to hardcode this here, so that your oracle client
# binaries will work. Otherwise, set in nagios's profile or something.
#
#export ORACLE_HOME PATH LD_LIBRARY_PATH
#ORACLE_HOME=/opt/oracle/product/8.1.7.3


PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
REVISION=`echo '$Revision: 1.2 $' | sed -e 's/[^0-9.]//g'`

. $PROGPATH/utils.sh


print_usage() {
  echo "Usage:"
  echo "  $PROGNAME --tns <Oracle Sid or Hostname/IP address>"
  echo "  $PROGNAME --db <ORACLE_SID>"
  echo "  $PROGNAME --oranames <Hostname>"
  echo "  $PROGNAME --oralogin <connect/pw at string>"
  echo "  $PROGNAME --help"
  echo "  $PROGNAME --version"
}

print_help() {
	print_revision $PROGNAME $REVISION
	echo ""
	print_usage
	echo ""
	echo "Check remote or local TNS status and check local Database status"
	echo ""
  echo "--tns=SID/IP Address"
  echo "   Check remote TNS server"
  echo "--db=SID"
  echo "   Check local database (search /bin/ps for PMON process and check"
	echo "   filesystem for sgadefORACLE_SID.dbf"
  echo "--oranames=Hostname"
  echo "   Check remote Oracle Names server"
  echo "--oralogin=user/pw at oracle_db.name"
  echo "   Try basic user login to oracle"
  echo "--help"
	echo "   Print this help screen"
  echo "--version"
	echo "   Print version and license information"
	echo ""
  echo "If the plugin doesn't work, check that the ORACLE_HOME environment"
	echo "variable is set, that ORACLE_HOME/bin is in your PATH, and the"
  echo "tnsnames.ora file is locatable and is properly configured."
  echo ""
  echo "When checking Local Database status your ORACLE_SID is case sensitive."
  echo ""
	support
}

check_login() {
  sqlplus $1 << EOF
  select * from dual;
  quit;
EOF
}

case "$1" in
1)
    cmd='--tns'
    ;;
2)
    cmd='--db'
    ;;
3)
    cmd='--oralogin'
    ;;
*)
    cmd="$1"
    ;;
esac

# Hunt down a reasonable ORACLE_HOME
if [ -z "$ORACLE_HOME" ] ; then
	# Adjust to taste
	for oratab in /var/opt/oracle/oratab /etc/oratab
	do
	[ ! -f $oratab ] && continue
	ORACLE_HOME=`IFS=:
		while read SID ORACLE_HOME junk;
		do
			if [ "$SID" = "$2" ] ; then
				echo $ORACLE_HOME;
				exit;
			fi;
		done < $oratab`
	[ -n "$ORACLE_HOME" ] && break
	done
fi
# Last resort
[ -z "$ORACLE_HOME" -a -d $PROGPATH/oracle ] && ORACLE_HOME=$PROGPATH/oracle

if [ -z "$ORACLE_HOME" -o ! -d "$ORACLE_HOME" ] ; then
	echo "Cannot determine ORACLE_HOME for sid $2"
	exit $STATE_UNKNOWN
fi
PATH=$PATH:$ORACLE_HOME/bin
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib
export ORACLE_HOME PATH LD_LIBRARY_PATH

case "$cmd" in
--tns)
    tnschk=` tnsping $2`
    tnschk2=` echo  $tnschk | grep -c OK`
    if [ ${tnschk2} -eq 1 ] ; then 
	tnschk3=` echo $tnschk | sed -e 's/.*(//' -e 's/).*//'`
	echo "OK - reply time ${tnschk3} from $2"
	exit $STATE_OK
    else
	echo "No TNS Listener on $2"
	exit $STATE_CRITICAL
    fi
    ;;
--oralogin)
    # we COULD do a somewhat more stringent check of output, but I think
    # this should be "good enough" ?
    check_login  $2 | grep ERROR >/dev/null
    if [ $? -eq 0 ] ; then
	# we saw "ERROR"
	echo "Error doing select from dual. Check login to database manually"
	exit $STATE_CRITICAL
    fi
    echo "OK - select statement succeeded"
    exit $STATE_OK
    
EOF	
    tnschk=` tnsping $2`
    tnschk2=` echo  $tnschk | grep -c OK`
    if [ ${tnschk2} -eq 1 ] ; then 
	tnschk3=` echo $tnschk | sed -e 's/.*(//' -e 's/).*//'`
	echo "OK - reply time ${tnschk3} from $2"
	exit $STATE_OK
    else
	echo "No TNS Listener on $2"
	exit $STATE_CRITICAL
    fi
    ;;
--oranames)
    namesctl status $2 | awk '
    /Server has been running for:/ {
	msg = "OK: Up"
	for (i = 6; i <= NF; i++) {
	    msg = msg " " $i
	}
	status = '$STATE_OK'
    }
    /error/ {
	msg = "CRITICAL: " $0
	status = '$STATE_CRITICAL'
    }
    END {
	print msg
	exit status
    }'
    ;;
--db)
    pmonchk=`ps -ef | grep -v grep | grep ${2} | grep -c pmon`
    if [ ${pmonchk} -ge 1 ] ; then
	echo "${2} OK - ${pmonchk} PMON process(es) running"
	exit $STATE_OK
    #if [ -f $ORACLE_HOME/dbs/sga*${2}* ] ; then
	#if [ ${pmonchk} -eq 1 ] ; then
    #utime=`ls -la $ORACLE_HOME/dbs/sga*$2* | cut -c 43-55`
	    #echo "${2} OK - running since ${utime}"
	    #exit $STATE_OK
	#fi
    else
	echo "${2} Database is DOWN"
	exit $STATE_CRITICAL
    fi
    ;;
--help)
		print_help
    exit $STATE_OK
    ;;
-h)
		print_help
    exit $STATE_OK
    ;;
--version)
		print_revision $PLUGIN $REVISION
    exit $STATE_OK
    ;;
-V)
		print_revision $PLUGIN $REVISION
    exit $STATE_OK
    ;;
*)
    print_usage
		exit $STATE_UNKNOWN
esac