Class: AWS::Cloudwatch::Base

Inherits:
Base
  • Object
show all
Defined in:
lib/AWS/Cloudwatch.rb,
lib/AWS/Cloudwatch/monitoring.rb

Instance Attribute Summary

Attributes inherited from Base

#port, #proxy_server, #server, #use_ssl

Instance Method Summary collapse

Methods inherited from Base

#extract_user_data, #initialize

Constructor Details

This class inherits a constructor from AWS::Base

Instance Method Details

#api_version ⇒ Object 



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# File 'lib/AWS/Cloudwatch.rb', line 20

def api_version
  API_VERSION
end

#default_host ⇒ Object 



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# File 'lib/AWS/Cloudwatch.rb', line 24

def default_host
  DEFAULT_HOST
end

#get_metric_statistics(options = {}) ⇒ Object

get_metric_statistics pulls a hashed array from Cloudwatch with the stats of your requested metric. Once you get the data out, if you assign the results into an object like: res = @mon.get_metric_statistics(:measure_name => ‘RequestCount’, \

:statistics => 'Average', :namespace => 'AWS/ELB')

This call gets the average request count against your ELB at each sampling period for the last 24 hours. You can then attach a block to the following iterator to do whatever you need to: res[‘Datapoints’].each

> provided options

Parameters:

  • options (Hash) (defaults to: {}) —

    a customizable set of options

Options Hash (options):

  • :custom_unit (String) — default: nil —

    not currently available, placeholder

  • :dimensions (String) — default: nil —

    Option to filter your data on. Check the developer guide

  • :end_time (Time) — default: Time.now() —

    Outer bound of the date range you want to view

  • :measure_name (String) — default: nil —

    The measure you want to check. Must correspond to

  • :namespace (String) — default: 'AWS/EC2' —

    The namespace of your measure_name. Currently, ‘AWS/EC2’ and ‘AWS/ELB’ are available

  • :period (Integer) — default: 60 —

    Granularity in seconds of the returned datapoints. Multiples of 60 only

  • :statistics (String) — default: nil —

    The statistics to be returned for your metric. See the developer guide for valid options. Required.

  • :start_time (Time) — default: Time.now() - 86400 —

    Inner bound of the date range you want to view. Defaults to 24 hours ago

  • :unit (String) — default: nil —

    Standard unit for a given Measure. See the developer guide for valid options.

Raises:



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# File 'lib/AWS/Cloudwatch/monitoring.rb', line 35

def get_metric_statistics ( options ={} )
  options = { :custom_unit => nil,
              :dimensions => nil,
              :end_time => Time.now(),      #req
              :measure_name => "",          #req
              :namespace => "AWS/EC2",
              :period => 60,
              :statistics => "",            # req
              :start_time => (Time.now() - 86400), # Default to yesterday
              :unit => "" }.merge(options)

  raise ArgumentError, ":end_time must be provided" if options[:end_time].nil?
  raise ArgumentError, ":end_time must be a Time object" if options[:end_time].class != Time
  raise ArgumentError, ":start_time must be provided" if options[:start_time].nil?
  raise ArgumentError, ":start_time must be a Time object" if options[:start_time].class != Time
  raise ArgumentError, ":start_time must be before :end_time" if options[:start_time] > options[:end_time]
  raise ArgumentError, ":measure_name must be provided" if options[:measure_name].nil? || options[:measure_name].empty?
  raise ArgumentError, ":statistics must be provided" if options[:statistics].nil? || options[:statistics].empty?

  params = {
              "CustomUnit" => options[:custom_unit],
              "EndTime" => options[:end_time].iso8601,
              "MeasureName" => options[:measure_name],
              "Namespace" => options[:namespace],
              "Period" => options[:period].to_s,
              "StartTime" => options[:start_time].iso8601,
              "Unit" => options[:unit]
  }

  # FDT: Fix statistics and dimensions values
  if !(options[:statistics].nil? || options[:statistics].empty?)
    stats_params = {}
    i = 1
    options[:statistics].split(',').each{ |stat|
      stats_params.merge!( "Statistics.member.#{i}" => "#{stat}" )
      i += 1
    }
    params.merge!( stats_params )
  end

  if !(options[:dimensions].nil? || options[:dimensions].empty?)
    dims_params = {}
    i = 1
    options[:dimensions].split(',').each{ |dimension|
      dimension_var = dimension.split('=')
      dims_params = dims_params.merge!( "Dimensions.member.#{i}.Name" => "#{dimension_var[0]}", "Dimensions.member.#{i}.Value" => "#{dimension_var[1]}" )
      i += 1
    }
    params.merge!( dims_params )
  end

  return response_generator(:action => 'GetMetricStatistics', :params => params)

end

#list_metrics ⇒ Object

This method call lists available Cloudwatch metrics attached to your EC2 account. To get further information from the metrics, you’ll then need to call get_metric_statistics.

there are no options available to this method.



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# File 'lib/AWS/Cloudwatch/monitoring.rb', line 10

def list_metrics
  return response_generator(:action => 'ListMetrics', :params => {})
end