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swapupdate.sh
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swapupdate.sh
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98
swapwatch.sh
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swapwatch.sh
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#!/bin/bash
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#version number
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#2.0.0
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#rewrite by rlong
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LOGDIR="/usr/local/lp/logs"
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TMPFILE="/usr/local/lp/temp/swapwatch.results"
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#Create and clear TMPFILE
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touch $TMPFILE
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cat /dev/null > $TMPFILE
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#check if it's already running
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if [ "$(ps ax | grep "$(basename $0)" -c )" -gt 4 ]
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then
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exit 1
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else
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#Find Current Load
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load=$(awk '{print $1}' /proc/loadavg | cut -d. -f1)
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#Find Current Free Swap
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swap_free=$(grep SwapFree /proc/meminfo | awk '{print $2}')
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#Find Swap Total
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swap_total=$(grep SwapTotal /proc/meminfo | awk '{print $2}')
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#get thresholds
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source /usr/local/lp/configs/swapwatch/swapwatch.conf
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#if that fails (file got rm'd?), use some defaults
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if [ "$?" -ne 0 ]
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then
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loadthreshold=5
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swapthreshold=524288
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contact="support@liquidweb.com"
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fi
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#check if we should run. either can trigger it
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#make sure server has a swap partition > 0 too
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if [[ "$load" -gt "$loadthreshold" || ("$swap_free" -lt "$swapthreshold" && "$swap_total" -ne 0) ]]
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then
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#Echo everything into a temp file, to help with ZD compatibility
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echo "Load at $load" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Swap free at $swap_free" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Swap threshold is at $swapthreshold" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Apache Status" >> $TMPFILE
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echo "" >> $TMPFILE
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/usr/bin/lynx -dump -width 500 -connect_timeout=10 http://127.0.0.1/whm-server-status | grep -v ___ | grep -v OPTIONS >> $TMPFILE 2>&1
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echo "" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Busiest Sites" >> $TMPFILE
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echo "" >> $TMPFILE
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/usr/bin/lynx -dump -width 500 -connect_timeout=5 http://127.0.0.1/whm-server-status | awk 'BEGIN { FS = " " } ; { print $12 }' | sed '/^$/d' | sort | uniq -c | sort -rn >> $TMPFILE 2>&1
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echo "" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Netstat for Port 80 Abuse" >> $TMPFILE
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echo "" >> $TMPFILE
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netstat -tn 2>/dev/null | grep :80 | awk '{print $5}' | cut -f1 -d: | sort | uniq -c | sort -rn | head >> $TMPFILE 2>&1
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echo "" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "MySQL Process List" >> $TMPFILE
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echo "" >> $TMPFILE
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mysqladmin proc stat --verbose >> $TMPFILE 2>&1
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echo "" >> $TMPFILE
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echo "Process List" >> $TMPFILE
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echo "" >> $TMPFILE
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/bin/ps faux >> $TMPFILE 2>&1
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echo "" >> $TMPFILE
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echo "" >> $TMPFILE
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echo "Processes sorted by RESIDENT memory" >> $TMPFILE
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echo "" >> $TMPFILE
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ps -e -o pid,rss,vsz,args --sort -rss,-vsz >> $TMPFILE 2>&1
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#Send the email to the $contact address
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subject="[LW] Swapwatch.sh on $(hostname)"
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contents=$(cat $TMPFILE)
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/usr/sbin/sendmail "$contact" <<EOF
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subject:$subject
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$contents
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EOF
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#restart apache to attempt to save server
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/etc/init.d/httpd restart > /dev/null 2>&1
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#log that swapwatch triggered
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echo "[ $(date +%c) ] swapwatch triggered - Load $load - Free swap $swap_free" >> /usr/local/lp/logs/swapwatch.log
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fi
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#remove the tempfile
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rm -f $TMPFILE
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fi
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75
swapwatchinstall.sh
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75
swapwatchinstall.sh
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#!/bin/bash
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#this will create swapwatch.sh, swapwatch.conf, and crontab to run swapwatch.sh, and swapwatchupdater
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###############################################################################
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APPDIR="/usr/local/lp/apps/swapwatch"
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LOGDIR="/usr/local/lp/logs"
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CONFDIR="/usr/local/lp/configs/swapwatch"
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swapurl="http://layer3.liquidweb.com/monitoring/swapwatch.sh" #this will be appserv or nagilink
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updateurl="http://layer3.liquidweb.com/monitoring/swapupdate.sh" #this will be appserv or nagilink
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###############################################################################
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#set default values, these can be changed in swapwatch.conf, but they are
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#better than ridgid default values
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#cpus is an easy count
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cpus=$(grep processor /proc/cpuinfo -c)
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#memory in kB
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memory=$(grep MemTotal /proc/meminfo |awk '{print $2}')
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#load trigger is 5 * CPUs
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loadthresh=$( expr $cpus \* 5 )
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#memory is: 2G thresh for 7+, 1G for 2+, .5G for less than that
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G=1048576 #your a gigabyte
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if [ $memory -gt $( expr 7 \* $G ) ]
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then
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swapthresh=$( expr 2 \* $G )
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elif [ $memory -gt $( expr 2 \* $G ) ]
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then
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swapthresh=$G
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else
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swapthresh=$( expr $G / 2 )
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fi
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###############################################################################
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##create the config file
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#loadthreshold=5
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#swapthreshold=1048576
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#update=yes
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mkdir -p "$CONFDIR"
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cat > "$CONFDIR/swapwatch.conf" << EOM
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loadthreshold=$loadthresh
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swapthreshold=$swapthresh
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update=yes
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contact="support@liquidweb.com"
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EOM
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###############################################################################
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#install
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mkdir -p "$APPDIR"
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echo "downloading swapwatch.sh"
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wget -O "$APPDIR/swapwatch.sh" $swapurl
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chmod +x "$APPDIR/swapwatch.sh"
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echo "*/3 * * * * root $APPDIR/swapwatch.sh > /dev/null 2>&1" > /etc/cron.d/swapwatch
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###############################################################################
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##get update script
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wget -O "$APPDIR/swapupdate.sh" $updateurl
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chmod +x "$APPDIR/swapupdate.sh"
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##check randomly once a week, to prevent tons of simmul conns to appserv
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min=$[ ( $RANDOM % 60 ) ] #0-59
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hour=$[ ( $RANDOM % 24 ) ] #0-23
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dow=$[ ( $RANDOM % 7 ) ] #0-6
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# $min $hour * * $dow
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echo "$min $hour * * $dow root $APPDIR/swapupdate.sh > /dev/null 2>&1" > /etc/cron.d/swapupdate
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###############################################################################
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#log install
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echo "[ $(date +%c) ] Swapwatch installed" >> $LOGDIR/swapwatch.log
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