initial commit from code.google.com

ec2-write-memory-metrics/README.txt

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+# Introduction:
+ec2-write-memory-metrics was created to extend Amazon's default metrics for EC2 instances to include a metrics for memory usage.
+# Directions For Use:
+#
+ec2-write-memory-metrics.sh
+## Example of Use:
+#
+The most valuable use of this application is to be run through cron on a regular basis.
+#
+# Additional Information:
+#
+Author: Colin Johnson / colin@cloudavail.com
+Date: 2011-11-22
+Version 0.1
+License Type: GNU GENERAL PUBLIC LICENSE, Version 3

ec2-write-memory-metrics/ec2-write-memory-metrics.sh

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