2012-06-17 22:46:53 +00:00
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#!/bin/bash -
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#get instance id - used for putting metric
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INSTANCE_ID=`curl -s http://169.254.169.254/latest/meta-data/instance-id`
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2013-04-03 22:52:00 +00:00
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INSTANCE_AZ=`curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone/`
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2012-06-17 22:46:53 +00:00
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INSTANCE_REGION=${INSTANCE_AZ%?}
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#could be done using "free" or "vmstat" - use of less and grep is believed to provide widest compatibility - CJ 2011-11-24
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memfree=`cat /proc/meminfo | grep -i MemFree | grep -o [0-9]*`
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swaptotal=`cat /proc/meminfo | grep -i SwapTotal | grep -o [0-9]*`
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swapfree=`cat /proc/meminfo | grep -i SwapFree | grep -o [0-9]*`
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swapused=$(($swaptotal-$swapfree))
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#mon-put-data to put metrics
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mon-put-data --region $INSTANCE_REGION --metric-name MemoryFree --namespace EC2/Memory --value $memfree --unit Kilobytes --dimensions "InstanceId=$INSTANCE_ID"
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mon-put-data --region $INSTANCE_REGION --metric-name SwapUsed --namespace EC2/Memory --value $swapused --unit Kilobytes --dimensions "InstanceId=$INSTANCE_ID"
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#to run in cron every 5 minutes - note that you must first provide credentials for mon-put-data
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2013-04-03 22:52:00 +00:00
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#echo "*/5 * * * * ec2-user /usr/local/bin/ec2-write-memory-metrics.sh" > /etc/cron.d/ec2-write-memory-metrics
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