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Let CloudWatch monitor your disk and memory utilisation

Posted on 2015/07/142016/07/03

It is possible to use CloudWatch to monitor your disk and memory usage. There are very good information on AWS – http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/mon-scripts-perl.html

For the impatient, here is how to get it done.

First, install the required packages

% yum install perl-DateTime perl-Sys-Syslog perl-LWP-Protocol-https
% wget http://aws-cloudwatch.s3.amazonaws.com/downloads/CloudWatchMonitoringScripts-1.2.1.zip

Unzip the zip file into /usr/local/bin. Then create the following cronjob:

*/5 * * * * /usr/local/bin/mon-put-instance-data.pl --disk-path=/ --disk-space-util --from-cron --aws-access-key-id=xxx --aws-secret-key=xxx

That’s it, in a few minutes, you should start seeing the graphs under “Linux System Metrics”. Here is what it looks like

CloudWatch_Management_Console

Of course, to use the cronjob, you need to grant at least CloudWatchFullAccess to a user and replace the “xxx” to the actual id and key.

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