CloudWatch custom metric examples

Creating custom metric requires some custom coding or scripting using the AWS Command Line Interface or SDK.   As the name implies these metric are custom so some custom coding / scripting is required to be done.  Here are some places to start that will provide examples of creating custom metric:
CloudWatch custom metric for MySQL using PHP:
http://aws.typepad.com/aws/2011/05/how-to-use-the-new-cloudwatch-user-defined-metrics-feature-with-php-1.html

Linux script sample custom CloudWatch metric for memory, disk space, and swap space:
http://aws.amazon.com/code/8720044071969977

More examples using the CloudWatch Command Interface to create custom metric:
http://blogs.clogeny.com/custom-metrics-in-amazon-cloudwatch/

Sample code for instance memory reporting:
#!/bin/bash export AWS_CLOUDWATCH_HOME=/home/ec2-user/CloudWatch-1.0.12.1 export AWS_CREDENTIAL_FILE=$AWS_CLOUDWATCH_HOME/credentials export AWS_CLOUDWATCH_URL=https://monitoring.amazonaws.com export PATH=$AWS_CLOUDWATCH_HOME/bin:$PATH export JAVA_HOME=/usr/lib/jvm/jre # get ec2 instance id instanceid=`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id` memtotal=`free -m | grep 'Mem' | tr -s ' ' | cut -d ' ' -f 2` memfree=`free -m | grep 'buffers/cache' | tr -s ' ' | cut -d ' ' -f 4` let "memused=100-memfree*100/memtotal" mon-put-data --metric-name "FreeMemoryMBytes" --namespace "System/Linux" --dimensions "InstanceId=$instanceid" --value "$memfree" --unit "Megabytes" mon-put-data --metric-name "UsedMemoryPercent" --namespace "System/Linux" --dimensions "InstanceId=$instanceid" --value "$memused" --unit "Percent"

S3 client side encryption

You can build your own library that encrypts your objects data on the client side before uploading it to Amazon S3. Or you can use the AWS provided SDK. Currently, only the AWS SDK for Java supports client-side encryption.

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