initial commit
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Fabio Scotto di Santolo
182
chapter17/fs_mon_except_MB.ksh
Executable file
182
chapter17/fs_mon_except_MB.ksh
Executable file
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#!/usr/bin/ksh
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#
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# SCRIPT: fs_mon.ksh
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# AUTHOR: Randy Michael
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# DATE: 08-22-2007
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# REV: 3.1.P
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# PURPOSE: This script is used to monitor for full filesystems,
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# which is defined as "exceeding" the FSMAX value.
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# A message is displayed for all "full" filesystems.
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#
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# PLATFORM: AIX, at least
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#
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# REV LIST:
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# 08-23-2007 - Randy Michael
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# Added code to override the default FSMAX script threshold
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# using an "exceptions" file, defined by the $EXCEPTIONS
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# variable, that list /mount_point and NEW_MAX%
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#
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# 08-26-2007 - Randy Michael
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# Added code to check both %USED and MB of Free space
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# with auto detection to switch from %USED to MB Free
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# for filesystems of 3GB and greater.
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#
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# set -n # Uncomment to check syntax without any execution
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# set -x # Uncomment to debug this script
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#
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##### DEFINE FILES AND VARIABLES HERE ####
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typeset -i FSTOTMB
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WORKFILE="/tmp/df.work" # Holds filesystem data
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>$WORKFILE # Initialize to empty file
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OUTFILE="/tmp/df.outfile" # Output display file
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>$OUTFILE # Initialize to empty file
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BINDIR="/usr/local/bin" # Local bin directory
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THISHOST=`hostname` # Hostname of this machine
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FSMAX="85%" # Max. FS percentage value
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EXCEPTIONS="${BINDIR}/exceptions" # Overrides $FSMAX
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MBSWITCH="1000MB" # Number of MB to switch from %USED to MB Free
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MBTRIGGER="40MB" # Minimum MB free before trigger
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####### DEFINE FUNCTIONS HERE #####
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function check_exceptions
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{
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# set -x # Uncomment to debug this function
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# Define a data file
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DATA_EXCEPTIONS="/tmp/dfdata.out"
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# Ingore any line that begins with a pound sign, #
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cat $EXCEPTIONS | grep -v "^#" > $DATA_EXCEPTIONS
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while read FSNAME NEW_MAX # Feeding Ddata from Bottom of Loop!!!
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do
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if [[ "$FSNAME" = "$FSMOUNT" ]] # Correct /mount_point?
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then
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if (( $FSTOTMB >= $MBSWITCH ))
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then
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# MB Free Space - Get rid of "MB" if exists!
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NEW_MIN_MB=$(echo $NEW_MAX | sed s/MB//g)
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(( NEW_MIN_MB = $NEW_MIN_MB * 1024000 )) # In bytes
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if (( $FSFREEMB < $NEW_MIN_MB ))
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then
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return 2 # Found below MB Trigger Level
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else
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return 3 # Found but OK
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fi
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else
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# Get rid of the % sign, if it exists!
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NEW_MAX=$(echo $NEW_MAX | sed s/\%//g)
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if [ $FSVALUE -gt $NEW_MAX ]
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then # Over Limit...Return a "0", zero
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return 0 # FOUND MAX OUT - Return 0
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fi
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fi
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fi
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done < $DATA_EXCEPTIONS # Feed from the bottom of the loop!!
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return 1 # Not found in File
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}
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######## START OF MAIN #############
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####### FORMAT VARIABLES ###########
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# Get rib of the "MB" letters if they exist
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MBTRIGGER=$(echo $MBTRIGGER | sed s/MB//g )
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MBSWITCH=$(echo $MBSWITCH | sed s/MB//g )
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# Get rid of the "%" if it exists
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FSMAX=$(echo $FSMAX | sed s/\%//g )
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# Get an "actual" value in Mega Bytes
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(( MBSWITCH = $MBSWITCH * 1024000 ))
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(( MBTRIGGER = $MBTRIGGER * 1024000 ))
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####################################
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# Get the data of interest by stripping out /dev/cd#,
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# /proc rows and keeping columns 1, 4 and 7
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df -k | tail +2 | egrep -v '/dev/cd[0-9] | /proc' \
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| awk '{print $1, $2, $3, $4, $7}' > $WORKFILE
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####################################
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# Loop through each line of the file and compare column 2
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while read FSDEVICE FSTOTKB FSFREEKB FSVALUE FSMOUNT
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do
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# Strip out the % sign if it exists
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FSVALUE=$(echo $FSVALUE | sed s/\%//g) # Remove the % sign
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(( FSTOTMB = $FSTOTKB * 1000 ))
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(( FSFREEMB = $FSFREEKB * 1000 ))
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if [[ -s $EXCEPTIONS ]] # Do we have a non-empty file?
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then # Found it!
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# Look for the current $FSMOUNT value in the file
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# using the check_exceptions function defined above.
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check_exceptions
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RC="$?"
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if [ $RC -eq 0 ] # Found it Exceeded by Percentage
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then
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echo "$FSDEVICE mounted on $FSMOUNT is ${FSVALUE}%" \
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>> $OUTFILE
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elif [ $RC -eq 2 ] # Found it Exceeded by MB Free
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then
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(( FSFREEMB = $FSFREEMB / 1000000 ))
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echo "$FSDEVICE mounted on $FSMOUNT only has ${FSFREEMB}MB Free" \
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>> $OUTFILE
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elif [ $RC -ne 3 ]
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then
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if (( $FSTOTMB >= $MBSWITCH ))
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then
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if (( $FSFREEMB < $MBTRIGGER )) # Use MB of Free Space?
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then
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(( FSFREEMB = $FSFREEMB / 1000000 ))
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echo "$FSDEVICE mounted on $FSMOUNT only has ${FSFREEMB}MB Free" \
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>> $OUTFILE
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elif [ $FSVALUE -gt $FSMAX ] # Use Script Default of % Used
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then
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echo "$FSDEVICE mounted on $FSMOUNT is ${FSVALUE}%" \
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>> $OUTFILE
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fi
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fi
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fi
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else # No exceptions file use the script default
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if (( $FSTOTMB >= $MBSWITCH ))
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then
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if (( $FSFREEMB < $MBTRIGGER ))
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then
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(( FSFREEMB = $FSFREEMB / 1000000 ))
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echo "$FSDEVICE mounted on $FSMOUNT only has ${FSFREEMB}MB Free" \
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>> $OUTFILE
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fi
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else
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if [ $FSVALUE -gt $FSMAX ] # Use Script Default
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then
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echo "$FSDEVICE mounted on $FSMOUNT is ${FSVALUE}%" \
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>> $OUTFILE
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fi
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fi
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fi
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done < $WORKFILE # Feed the while loop from the bottom...
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# Display output if anything is exceeded...
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if [[ -s $OUTFILE ]]
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then
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echo "\nFull Filesystem(s) on $THISHOST\n"
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cat $OUTFILE
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print
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fi
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