AWS Elastic Beanstalk – How to Get a Memory Usage Chart

The AWS CLI now supports the --query parameter which takes a JMESPath expressions.

This means you can sum the size values given by list-objects using sum(Contents[].Size) and count like length(Contents[]).

This can be be run using the official AWS CLI as below and was introduced in Feb 2014

 aws s3api list-objects --bucket BUCKETNAME --output json --query "[sum(Contents[].Size), length(Contents[])]"

Use Terraform or CloudFormation to manage the required Load Balancer, EC2 Instances and other resources. Although it requires more work up-front than ElasticBeanstalk, it is possible to precisely control every aspect of your resources. Software installation and instance configuration from .ebextensions can be replaced with AWS::CloudFormation::Init and AWS's cfn-init helper script.

I'll also recommend troposphere for generating CloudFormation templates. The syntax maps 1-to-1 against the CloudFormation's resource syntax, but will generate errors for misspelled property names or invalid property types. Combined with boto it was possible to fully automate my application deployment lifecycle with simple python command line utilities.