Class: Interferon::HostSources::AwsElasticache

Inherits:
Object
  • Object
show all
Defined in:
lib/interferon/host_sources/aws_elasticache.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ AwsElasticache

Returns a new instance of AwsElasticache.



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# File 'lib/interferon/host_sources/aws_elasticache.rb', line 5

def initialize(options)
  missing = %w{access_key_id secret_access_key}.reject{|r| options.key?(r)}

  AWS.config({
      :access_key_id => options['access_key_id'],
      :secret_access_key => options['secret_access_key']
  }) if missing.empty?

  # initialize a list of regions to check
  if options['regions'] && !options['regions'].empty?
    @regions = options['regions']
  else
    @regions = AWS::regions.map(&:name)
  end
end

Instance Method Details

#list_hosts ⇒ Object 



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# File 'lib/interferon/host_sources/aws_elasticache.rb', line 21

def list_hosts
  hosts = []

  @regions.each do |region|
    clusters = []
    client = AWS::ElastiCache.new(:region => region).client

    AWS.memoize do
      # read the list of cache clusters; we have to do our own pagination
      clusters = []
      options = {:show_cache_node_info => true}
      loop do
        r = client.describe_cache_clusters(options)
        clusters += r.data[:cache_clusters]

        break unless r.data[:marker]
        options[:marker] = r.data[:marker]
      end

      # iterate over the nodes in each cluster and add each one to hosts
      clusters.each do |cluster|
        cluster[:cache_nodes].each do |node|
          hosts << {
            :source => 'aws_elasticache',
            :region => region,

            :cluster_id => cluster[:cache_cluster_id],
            :cluster_status => cluster[:cache_cluster_status],
            :node_type => cluster[:cache_node_type],
            :peer_nodes => cluster[:num_cache_nodes],

            :node_status => node[:cache_node_status],

            # elasticache does not support tagging
            :owners => [],
            :owner_groups => [],
          }
        end
      end
    end
  end

  return hosts
end