Class: ClearSkies::AWS::CloudWatch::ELBGauge

Inherits:
Gauge
  • Object
show all
Defined in:
lib/clear_skies/aws/cloud_watch/elb_gauge.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Gauge

#aws_metrics, cloudwatch_client, #metrics, register

Constructor Details

#initialize(metric_name, dimension, statistics, description: nil, &block) ⇒ ELBGauge

Returns a new instance of ELBGauge.



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# File 'lib/clear_skies/aws/cloud_watch/elb_gauge.rb', line 9

def initialize(metric_name, dimension, statistics, description: nil, &block)
  super("AWS/ELB", metric_name, dimension, statistics, description: description, &block)
end

Class Method Details

.elb_client ⇒ Object 



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# File 'lib/clear_skies/aws/cloud_watch/elb_gauge.rb', line 6

def self.elb_client
  @elb_client ||= Aws::ElasticLoadBalancing::Client.new
end

Instance Method Details

#labels_from_metric(metric) ⇒ Object 



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# File 'lib/clear_skies/aws/cloud_watch/elb_gauge.rb', line 26

def labels_from_metric(metric)
  labels = super(metric)

  if labels.has_key?( "load_balancer_name") && !(Rails.cache.fetch("#{labels["load_balancer_name"]}_skip"))

    labels["vpc_id"] = Rails.cache.fetch("#{labels["load_balancer_name"]}_vpc_id_") do
      ELBGauge.elb_client.describe_load_balancers(load_balancer_names: [labels["load_balancer_name"]]).load_balancer_descriptions.first.vpc_id
    end

    labels.merge!(Rails.cache.fetch("#{labels["load_balancer_name"]}_tags_", expires_in: 1.hour, race_condition_ttl: 60.seconds) do
      tags(labels["load_balancer_name"])
    end)
  end
  labels
rescue Aws::ElasticLoadBalancing::Errors::LoadBalancerNotFound
  Rails.cache.write("#{labels["load_balancer_name"]}_skip", true, expires_in: 1.hour, race_condition_ttl: 60.seconds)
  return labels
end

#tags(load_balancer_name) ⇒ Object 



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# File 'lib/clear_skies/aws/cloud_watch/elb_gauge.rb', line 13

def tags(load_balancer_name)
  labels = {}
  ELBGauge.elb_client.
      describe_tags({load_balancer_names: [load_balancer_name]}).
      tag_descriptions.
      select {|doc| doc.load_balancer_name == load_balancer_name}.each do |tag_description|
    tag_description.tags.each do |tag|
      labels[tag.key.downcase] = tag.value
    end
  end
  labels
end