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README.rdoc

AWS SDK for Ruby – CloudWatch API support

This gem adds rudimentary support for the CloudWatch API to the official AWS SDK for Ruby.

SYNOPSIS

require 'aws/cloud_watch'

cw = AWS::CloudWatch.new

# all low-level API methods are supported, eg.

cw.client.get_metric_statistics :start_time => Time.utc(2012, 5, 1).iso8601, :end_time => Time.utc(2012, 5, 7).iso8601, :namespace => 'AWS/EC2', :period => 24*60*60, :statistics => ['Average'], :metric_name => 'CPUUtilization', :dimensions => [{ :name => 'InstanceId', :value => 'i-ecb73258' }]
cw.client.list_metrics :namespace => 'AWS/EC2'

There is currently only some high level access to EC2 metrics:

require 'aws/cloud_watch/ec2'

ec2 = AWS::EC2.new

instance = ec2.instances['i-ecb73258']

instance.metrics
instance.metrics['CPUUtilization'].get :average, 24*60*60, Time.utc(2012, 5, 20)..Time.utc(2012, 5, 21)

# there are some shortcuts:

instance.cpu_utilization.get :average, 24*60*60, Time.utc(2012, 5, 20)..Time.utc(2012, 5, 21)
instance.cpu_utilization.get :average, 24*60*60, Time.utc(2012, 5, 21)        # takes a single period
instance.cpu_utilization.average 24*60*60, Time.utc(2012, 5, 21)
instance.cpu_utilization 24*60*60, Time.utc(2012, 5, 21)      # CPU utilization is averaged by default, others are summed
instance.cpu_utilization 24*60*60     # returns average CPU utilization for the last 24 hours

# or, if you require 'active_support/core_ext'
instance.cpu_utilization 1.day

Note that variants without a time range return value directly.

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