使用shell脚本进行服务器系统监控——页面调度与交换空间监控

#!/usr/bin/ksh

PC_LIMIT=65 # Upper limit of Swap space percentage
# before notification

THISHOST=$(hostname) # Host name of this machine

echo "/nSwap Space Report for $THISHOST/n"
date

function SUN_swap_mon
{
SW_USED=$(swap -s | awk '{print $9}' | cut -dk -f1)
SW_FREE=$(swap -s | awk '{print $11}' | cut -dk -f1)
((SW_TOTAL = SW_USED + SW_FREE))
PERCENT_USED=$(bc <<EOF
scale=4
($SW_USED / $SW_TOTAL) * 100
EOF
)

PERCENT_FREE=$(bc <<EOF
scale=4
($SW_FREE / $SW_TOTAL) * 100
EOF
)

# Convert the KB measurements to MB measurements

((SW_TOTAL_MB = SW_TOTAL / 1000))
((SW_USED_MB = SW_USED / 1000))
((SW_FREE_MB = SW_FREE / 1000))

# Produce the remaining part of the report

echo "/nTotal Amount of Swap Space:/t${SW_TOTAL_MB}MB"
echo "Total KB of Swap Space Used:/t${SW_USED_MB}MB"
echo "Total KB of Swap Space Free:/t${SW_FREE_MB}MB"
echo "/nPercent of Swap Space Used:/t${PERCENT_USED}%"
echo "/nPercent of Swap Space Free:/t${PERCENT_FREE}%"

# Grab the integer portion of the percent used

INT_PERCENT_USED=$(echo $PERCENT_USED | cut -d. -f1)

# Check to see if the percentage used maxmum threshold
# has beed exceeded

if (( PC_LIMIT <= INT_PERCENT_USED ))
then
# Percent used has exceeded the threshold, send notification

tput smso # Turn on reverse video!
echo "/n/nWARNING: Swap Space has Exceeded the ${PC_LIMIT}% Upper Limit!/n"
tput rmso # Turn off reverse video!
fi

echo "/n"
}

function Linux_swap_mon
{

free -m | grep -i swap | while read junk SW_TOTAL SW_USED SW_FREE
do
PERCENT_USED=$(bc <<EOF
scale=4
($SW_USED / $SW_TOTAL) * 100
EOF
)

PERCENT_FREE=$(bc <<EOF
scale=4
($SW_FREE / $SW_TOTAL) * 100
EOF
)

# Produce the rest of the paging space report:
echo "/nTotal Amount of Swap Space:/t${SW_TOTAL}MB"
echo "Total KB of Swap Space Used:/t${SW_USED}MB"
echo "Total KB of Swap Space Free:/t${SW_FREE}MB"
echo "/nPercent of Swap Space Used:/t${PERCENT_USED}%"
echo "/nPercent of Swap Space Free:/t${PERCENT_FREE}%"

# Grap the integer portion of the percent used to
# test for the over limit threshold

INT_PERCENT_USED=$(echo $PERCENT_USED | cut -d. -f1)

if (( PC_LIMIT <= INT_PERCENT_USED ))
then
tput smso
echo "/n/nWARNING: Paging Space has Exceeded the /
${PC_LIMIT}% Upper Limit!/n"
tput rmso
fi

done

echo "/n"
}

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

function HP_UX_swap_mon
{
############# CAPTURE AND PROCESS THE DATA ################

# Start a while read loop by using the piped in input from
# the swapinfo -tm command output.

swapinfo -tm | grep dev | while read junk SW_TOTAL SW_USED /
SW_FREE PERCENT_USED junk2
do
# Calculate the percentage of free swap space

((PERCENT_FREE = 100 - $(echo $PERCENT_USED | cut -d% -f1) ))

echo "/nTotal Amount of Swap Space:/t${SW_TOTAL}MB"
echo "Total MB of Swap Space Used:/t${SW_USED}MB"
echo "Total MB of Swap Space Free:/t${SW_FREE}MB"
echo "/nPercent of Swap Space Used:/t${PERCENT_USED}"
echo "/nPercent of Swap Space Free:/t${PERCENT_FREE}%"

# Check for paging space exceeded the predefined limit

if (( PC_LIMIT <= $(echo $PERCENT_USED | cut -d% -f1) ))
then
# Swap space is over the predefined limit, send notification

tput smso # Turn on reverse video!
echo "/n/nWARNING: Swap Space has Exceeded the/
${PC_LIMIT}% Upper Limit!/n"
tput rmso # Turn reverse video off!
fi

done

echo "/n"
}

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

function AIX_paging_mon
{
################ DEFINE VARIABLES HERE ####################

PAGING_STAT=/tmp/paging_stat.out # Paging Stat hold file

###########################################################
############# CAPTURE AND PROCESS THE DATA ################

# Load the data in a file without the column headings

lsps -s | tail +2 > $PAGING_STAT

# Start a while loop and feed the loop from the bottom using
# the $PAGING_STAT file as redirected input

while read TOTAL PERCENT
do
# Clean up the data by removing the suffixes
PAGING_MB=$(echo $TOTAL | cut -d 'MB' -f1)
PAGING_PC=$(echo $PERCENT | cut -d% -f1)

# Calculate the missing data: %Free, MB used and MB free
(( PAGING_PC_FREE = 100 - PAGING_PC ))
(( MB_USED = PAGING_MB * PAGING_PC / 100 ))
(( MB_FREE = PAGING_MB - MB_USED ))

# Produce the rest of the paging space report:
echo "/nTotal MB of Paging Space:/t$TOTAL"
echo "Total MB of Paging Space Used:/t${MB_USED}MB"
echo "Total MB of Paging Space Free:/t${MB_FREE}MB"
echo "/nPercent of Paging Space Used:/t${PERCENT}"
echo "/nPercent of Paging Space Free:/t${PAGING_PC_FREE}%"

# Check for paging space exceeded the predefined limit
if ((PC_LIMIT <= PAGING_PC))
then
# Paging space is over the limit, send notification

tput smso # Turn on reverse video!

echo "/n/nWARNING: Paging Space has Exceeded the ${PC_LIMIT}% /
Upper Limit!/n"

tput rmso # Turn off reverse video
fi

done < $PAGING_STAT

rm -f $PAGING_STAT

# Add an extra new line to the output

echo "/n"
}

###########################################################
################## BEGINNING OF MAIN ######################
###########################################################

###########################################################
################ DEFINE VARIABLES HERE ####################

PC_LIMIT=65 # Upper limit of Swap space percentage
# before notification

THISHOST=$(hostname) # Host name of this machine

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

# Find the Operating System and execute the correct function

case $(uname) in

AIX) AIX_paging_mon
;;
HP-UX) HP_UX_swap_mon
;;
Linux) Linux_swap_mon
;;
SunOS) SUN_swap_mon
;;
esac

# End of all-in-one_swapmon.ksh