76 lines
2.3 KiB
Bash
76 lines
2.3 KiB
Bash
#!/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/sw/apps/swapwatch"
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LOGDIR="/usr/local/sw/logs"
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CONFDIR="/usr/local/sw/configs/swapwatch"
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swapurl="http://DOMAIN.COM/swapwatch.sh" #this will be appserv or nagilink
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updateurl="http://DOMAIN.com/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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