Enabling logging in the aws-sdk gem

enable logging

require 'aws-sdk'
require 'logger'

# configure a logger instance that logs to standard out,
# this could be a file, standard error, etc.  The logger only
# needs to respond to #log and accept a severity and a message.
AWS.config(:logger => Logger.new($stdout))

# make a request to see the request logger
ec2 = AWS::EC2.new
ec2.instances.first