initial commit
This commit is contained in:
Fabio Scotto di Santolo
316
chapter18/all-in-one_swapmon.ksh
Executable file
316
chapter18/all-in-one_swapmon.ksh
Executable file
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#!/usr/bin/ksh
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#
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# SCRIPT: all-in-one_swapmon.ksh
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#
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# AUTHOR: Randy Michael
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# DATE: 5/31/2007
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# REV: 3.0.P
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#
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# PLATFORM: AIX, Solaris, HP-UX, Linux, and OpenBSD Only
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#
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# PURPOSE: This shell script is used to produce a report of
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# the system's paging or swap space statistics including:
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#
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# Total paging space in MB, MB of Free paging space,
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# MB of Used paging space, % of paging space Used, and
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# % of paging space Free
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#
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# REV LIST:
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#
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# 11/5/2007 -- Randy Michael
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#
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# REVISION: Added a function for OpenBSD swap monitoring and changed the case
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# statement controlling correct usage depending on the OS.
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#
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##############
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#
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# set -x # Uncomment to debug this shell script
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# set -n # Uncomment to check command syntax without any execution
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#
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###########################################################
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################ DEFINE VARIABLES HERE ####################
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PC_LIMIT=65 # Upper limit of Swap space percentage
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# before notification
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THISHOST=$(hostname) # Host name of this machine
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case $(basename $SHELL) in
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bash) alias echo="echo -e"
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;;
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esac
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###########################################################
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################ INITIALIZE THE REPORT ####################
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echo "\nSwap Space Report for $THISHOST\n"
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date
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###########################################################
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################ DEFINE FUNCTIONS HERE ####################
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function SUN_swap_mon
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{
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############# CAPTURE AND PROCESS THE DATA ################
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# Use two awk statements to extract the $9 and $11 fields
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# from the swap -s command output
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SW_USED=$(swap -s | awk '{print $9}' | cut -dk -f1)
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SW_FREE=$(swap -s | awk '{print $11}' | cut -dk -f1)
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# Add SW_USED to SW_FREE to get the total swap space
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((SW_TOTAL = SW_USED + SW_FREE))
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# Calculate the percent used and percent free using the
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# bc utility in a here documentation with command substitution
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PERCENT_USED=$(bc <<EOF
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scale=4
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($SW_USED / $SW_TOTAL) * 100
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EOF
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)
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PERCENT_FREE=$(bc <<EOF
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scale=4
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($SW_FREE / $SW_TOTAL) * 100
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EOF
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)
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# Convert the KB measurements to MB measurements
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((SW_TOTAL_MB = SW_TOTAL / 1000))
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((SW_USED_MB = SW_USED / 1000))
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((SW_FREE_MB = SW_FREE / 1000))
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# Produce the remaining part of the report
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echo "\nTotal Amount of Swap Space:\t${SW_TOTAL_MB}MB"
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echo "Total KB of Swap Space Used:\t${SW_USED_MB}MB"
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echo "Total KB of Swap Space Free:\t${SW_FREE_MB}MB"
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echo "\nPercent of Swap Space Used:\t${PERCENT_USED}%"
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echo "\nPercent of Swap Space Free:\t${PERCENT_FREE}%"
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# Grab the integer portion of the percent used
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INT_PERCENT_USED=$(echo $PERCENT_USED | cut -d. -f1)
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# Check to see if the percentage used maxmum threshold
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# has beed exceeded
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if (( PC_LIMIT <= INT_PERCENT_USED ))
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then
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# Percent used has exceeded the threshold, send notification
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tput smso # Turn on reverse video!
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echo "\n\nWARNING: Swap Space has Exceeded the ${PC_LIMIT}% Upper Limit!\n"
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tput rmso # Turn off reverse video!
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fi
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echo "\n"
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}
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###########################################################
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function Linux_swap_mon
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{
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############# CAPTURE AND PROCESS THE DATA ################
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free -m | grep -i swap | while read junk SW_TOTAL SW_USED SW_FREE
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do
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# Use the bc utility in a here document to calculate
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# the percentage of free and used swap space.
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PERCENT_USED=$(bc <<EOF
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scale=4
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($SW_USED / $SW_TOTAL) * 100
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EOF
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)
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PERCENT_FREE=$(bc <<EOF
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scale=4
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($SW_FREE / $SW_TOTAL) * 100
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EOF
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)
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# Produce the rest of the paging space report:
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echo "\nTotal Amount of Swap Space:\t${SW_TOTAL}MB"
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echo "Total KB of Swap Space Used:\t${SW_USED}MB"
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echo "Total KB of Swap Space Free:\t${SW_FREE}MB"
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echo "\nPercent of Swap Space Used:\t${PERCENT_USED}%"
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echo "\nPercent of Swap Space Free:\t${PERCENT_FREE}%"
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# Grap the integer portion of the percent used to
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# test for the over limit threshold
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INT_PERCENT_USED=$(echo $PERCENT_USED | cut -d. -f1)
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if (( PC_LIMIT <= INT_PERCENT_USED ))
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then
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tput smso
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echo "\n\nWARNING: Paging Space has Exceeded the ${PC_LIMIT}% Upper Limit!\n"
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tput rmso
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fi
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done
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echo "\n"
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}
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###########################################################
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function HP_UX_swap_mon
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{
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############# CAPTURE AND PROCESS THE DATA ################
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# Start a while read loop by using the piped in input from
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# the swapinfo -tm command output.
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swapinfo -tm | grep dev | while read junk SW_TOTAL SW_USED \
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SW_FREE PERCENT_USED junk2
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do
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# Calculate the percentage of free swap space
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((PERCENT_FREE = 100 - $(echo $PERCENT_USED | cut -d% -f1) ))
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echo "\nTotal Amount of Swap Space:\t${SW_TOTAL}MB"
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echo "Total MB of Swap Space Used:\t${SW_USED}MB"
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echo "Total MB of Swap Space Free:\t${SW_FREE}MB"
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echo "\nPercent of Swap Space Used:\t${PERCENT_USED}"
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echo "\nPercent of Swap Space Free:\t${PERCENT_FREE}%"
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# Check for paging space exceeded the predefined limit
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if (( PC_LIMIT <= $(echo $PERCENT_USED | cut -d% -f1) ))
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then
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# Swap space is over the predefined limit, send notification
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tput smso # Turn on reverse video!
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echo "\n\nWARNING: Swap Space has Exceeded the ${PC_LIMIT}% Upper Limit!\n"
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tput rmso # Turn reverse video off!
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fi
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done
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echo "\n"
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}
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###########################################################
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function AIX_paging_mon
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{
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################ DEFINE VARIABLES HERE ####################
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PAGING_STAT=/tmp/paging_stat.out # Paging Stat hold file
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###########################################################
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############# CAPTURE AND PROCESS THE DATA ################
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# Load the data in a file without the column headings
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lsps -s | tail +2 > $PAGING_STAT
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# Start a while loop and feed the loop from the bottom using
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# the $PAGING_STAT file as redirected input
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while read TOTAL PERCENT
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do
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# Clean up the data by removing the suffixes
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PAGING_MB=$(echo $TOTAL | cut -d 'MB' -f1)
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PAGING_PC=$(echo $PERCENT | cut -d% -f1)
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# Calculate the missing data: %Free, MB used and MB free
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(( PAGING_PC_FREE = 100 - PAGING_PC ))
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(( MB_USED = PAGING_MB * PAGING_PC / 100 ))
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(( MB_FREE = PAGING_MB - MB_USED ))
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# Produce the rest of the paging space report:
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echo "\nTotal MB of Paging Space:\t$TOTAL"
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echo "Total MB of Paging Space Used:\t${MB_USED}MB"
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echo "Total MB of Paging Space Free:\t${MB_FREE}MB"
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echo "\nPercent of Paging Space Used:\t${PERCENT}"
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echo "\nPercent of Paging Space Free:\t${PAGING_PC_FREE}%"
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# Check for paging space exceeded the predefined limit
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if ((PC_LIMIT <= PAGING_PC))
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then
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# Paging space is over the limit, send notification
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tput smso # Turn on reverse video!
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echo "\n\nWARNING: Paging Space has Exceeded the ${PC_LIMIT}% Upper Limit!\n"
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tput rmso # Turn off reverse video
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fi
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done < $PAGING_STAT
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rm -f $PAGING_STAT
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# Add an extra new line to the output
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echo "\n"
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}
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###########################################################
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function OpenBSD_swap_mon
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{
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###########################################################
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############# CAPTURE AND PROCESS THE DATA ################
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# Load the data in a file without the column headings
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swapctl -lk | tail +2 | awk '{print $2, $3, $4, $5}' \
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| while read KB_TOT KB_USED KB_AVAIL PC_USED
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do
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(( TOTAL = KB_TOT / 1000 ))
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(( MB_USED = KB_USED / 1000 ))
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(( MB_FREE = KB_AVAIL / 1000 ))
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PC_FREE_NO_PC=$(echo $PC_USED | awk -F '%' '{print $1}')
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(( PC_FREE = 100 - PC_FREE_NO_PC ))
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# Produce the rest of the paging space report:
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echo "\nTotal MB of Paging Space:\t${TOTAL}MB"
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echo "Total MB of Paging Space Used:\t${MB_USED}MB"
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echo "Total MB of Paging Space Free:\t${MB_FREE}MB"
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echo "\nPercent of Paging Space Used:\t${PC_USED}"
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echo "\nPercent of Paging Space Free:\t${PC_FREE}%\n"
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done
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# Check for paging space exceeded the predefined limit
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if (( PC_LIMIT <= PC_FREE_NO_PC ))
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then
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echo "\n\nWARNING: Paging Space has Exceeded the ${PC_LIMIT}% Upper Limit!\n"
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fi
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}
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###########################################################
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################## BEGINNING OF MAIN ######################
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###########################################################
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# Find the Operating System and execute the correct function
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case $(uname) in
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AIX) AIX_paging_mon
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;;
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HP-UX) HP_UX_swap_mon
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;;
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Linux) Linux_swap_mon
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;;
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SunOS) SUN_swap_mon
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;;
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OpenBSD) OpenBSD_swap_mon
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;;
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*) echo "\nERROR: Unsupported Operating System...EXITING\n"
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exit 1
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;;
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esac
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# End of all-in-one_swapmon.ksh
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