Class: Cloudfinder::EC2::Detector

Inherits:
Object
  • Object
show all
Defined in:
lib/cloudfinder-ec2/detector.rb

Constant Summary collapse

EC2_METADATA_TIMEOUT = 
5
EC2_METADATA_BASE_URL = 
'http://169.254.169.254/latest/meta-data'

Instance Method Summary collapse

Instance Method Details

#detect_cluster ⇒ Hash

Detects the cluster for the current instance using the instance metadata service and the AWS API to fetch tags.

Returns:

  • (Hash) —

    with the cluster_name, cluster_role, instance_id and region



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# File 'lib/cloudfinder-ec2/detector.rb', line 12

def detect_cluster
  initialize_metadata
  result = {
      region:       @region,
      instance_id:  @instance_id,
      cluster_name: nil,
      cluster_role: nil
  }

  find_instance_tags.each do |tag|
    if tag[:key] === CLUSTER_TAG_NAME
      result[:cluster_name] = tag[:value]
    elsif tag[:key] === ROLE_TAG_NAME
      result[:cluster_role] = tag[:value].to_sym
    end
  end

  if result[:cluster_name].nil? || result[:cluster_role].nil?
    result[:cluster_name] = nil
    result[:cluster_role] = nil
  end

  result
end