check_multipath added

check_multipath/check_multipath

@@ -0,0 +1,160 @@
+#!/bin/sh
+#
+# Nagios plugin to check the state of Linux device mapper multipath devices
+#
+# (C) 2006 Riege Software International GmbH
+# Licensed under the General Public License, Version 2
+# Contact: Gunther Schlegel, schlegel@riege.com
+#          Matija Nalis, mnalis+debian@carnet.hr
+#
+# v1.0	20060220 gs	new script
+# v1.1  20091020 mnalis fix -n handling to work (parsing not working, ignoring last lun...)
+
+PROGNAME=`basename $0`
+PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+REVISION=`echo '$Revision: 1.12 $' | sed -e 's/[^0-9.]//g'`
+
+. $PROGPATH/utils.sh
+
+MULTIPATH=/sbin/multipath
+SUDO=/usr/bin/sudo
+LSMOD=/sbin/lsmod
+
+print_usage() {
+	echo "Usage:"
+	echo "  $PROGNAME [-n NUMPATHS]"
+	echo ""
+	echo "Options:"
+	echo "  -n NUMPATHS     If specified there must be NUMPATHS paths present for each LUN"
+}
+
+print_help() {
+	print_revision $PROGNAME $REVISION
+
+	echo "Check multipath status."
+	echo ""
+	print_usage
+	echo ""
+	echo "Really simple: runs $MULTIPATH and greps for \"failed\" paths."
+	echo "if NUMPATHS is specified each LUN must have that number of PATHS present."
+	echo ""
+
+	echo "Requires sudo and multipath-tools"
+	echo ""
+
+	echo "Add this to your sudoers file by running visudo to add access:"
+	if [ -r /proc/modules ]; then
+		echo "Cmnd_Alias MULTIPATH=$MULTIPATH -l"
+	else
+		echo "Cmnd_Alias MULTIPATH=$MULTIPATH -l, $SUDO"
+	fi
+	echo "nagios  ALL= NOPASSWD: MULTIPATH"
+	echo "The user nagios may very well be nobody or someone else depending on your configuration"
+	echo ""
+	support
+}
+
+NUMPATHS=''
+
+# Information options
+case "$1" in
+--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
+	;;
+-n)
+	shift
+	NUMPATHS="$1"
+	;;
+esac
+
+if [ ! -x $MULTIPATH ]; then
+	echo "MULTIPATH: UNKNOWN - $MULTIPATH not found"
+	exit $STATE_UNKNOWN
+fi
+
+# if not yet root, check sudo
+if [ $(id -un) != "root" ]; then
+	MULTIPATH="$SUDO $MULTIPATH"
+	# on grsec kernel /proc might be protected
+	if [ ! -r /proc/modules ]; then
+		LSMOD="$SUDO $LSMOD"
+	fi
+fi
+
+OUTPUT=$($MULTIPATH -l 2>/dev/null)
+if [ $? != 0 ]; then
+	# Failed. grab more info why
+	if [ $(id -un) != "root" ] && [ `$SUDO -l | grep -c multipath` -eq 0 ]; then
+		echo "MULTIPATH: UNKNOWN - sudo not configured"
+		exit $STATE_UNKNOWN
+	fi
+
+	MODCOUNT=$($LSMOD | grep -c ^dm_multipath)
+	if [ $MODCOUNT = 0 ]; then
+		echo "MULTIPATH: UNKNOWN - Module dm-multipath not loaded"
+		exit $STATE_UNKNOWN
+	fi
+
+	echo "MULTIPATH: $(MULTIPATH -l 2>&1)"
+	exit $STATE_UNKNOWN
+fi
+
+PATHCOUNT=$(echo "$OUTPUT" | wc -l)
+if [ $PATHCOUNT -eq 0 ]; then
+	echo "MULTIPATH: WARNING - No paths defined"
+	exit $STATEWARNING
+fi
+
+FAILCOUNT=$(echo "$OUTPUT" | grep -c failed)
+if [ $FAILCOUNT -gt 0 ]; then
+	echo "MULTIPATH: CRITICAL - $FAILCOUNT paths failed"
+	exit $STATE_CRITICAL
+fi
+
+if [ "$NUMPATHS" ]; then
+	echo "$OUTPUT" | awk -vnumpaths=$NUMPATHS -vrc=0 -vlun= -vtargets=0 '
+	/^\[/ {next} # skip flags
+	/^\\/ {next} # skip devinfo
+   	/^ \\/ {targets++; next} # count targets
+	{
+		# The LUN line
+		# process if this is not first LUN
+		if (lun && numpaths != targets) {
+			printf("CRITICAL: %d of %d paths available for LUN %s\n", targets, numpaths, lun)
+			rc = 1
+		}
+
+		# reset counter
+		targets = 0
+		lun = $0
+	}
+	END {
+		if (lun && numpaths != targets) {
+			printf("CRITICAL: %d of %d paths available for LUN %s\n", targets, numpaths, lun)
+			rc = 1
+		}
+		exit rc 
+	}
+	'
+	if [ $? -gt 0 ]; then
+		exit $STATE_CRITICAL
+	fi
+fi
+
+echo "MULTIPATH: OK - No failed paths"
+exit $STATE_OK
+
+# vim: ts=4:sw=4:noet