Module: MovableInk::AWS::Metadata

Included in:
MovableInk::AWS
Defined in:
lib/movable_ink/aws/metadata.rb

Instance Method Summary collapse

Instance Method Details

#availability_zone ⇒ Object 



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# File 'lib/movable_ink/aws/metadata.rb', line 24

def availability_zone
  @availability_zone ||= begin
    az = retrieve_metadata('placement/availability-zone')
    raise(MovableInk::AWS::Errors::EC2Required) if az.empty?
    az
  end
end

#http ⇒ Object 



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# File 'lib/movable_ink/aws/metadata.rb', line 6

def http
  @http ||= begin
    http = Net::HTTP.new("169.254.169.254", 80)
    http.open_timeout = 1
    http.read_timeout = 1
    http
  end
end

#instance_id ⇒ Object 



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# File 'lib/movable_ink/aws/metadata.rb', line 32

def instance_id
  @instance_id ||= begin
    id = retrieve_metadata('instance-id')
    raise(MovableInk::AWS::Errors::EC2Required) if id.empty?
    id
  end
end

#private_ipv4 ⇒ Object 



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# File 'lib/movable_ink/aws/metadata.rb', line 40

def private_ipv4
  @ipv4 ||= begin
    ipv4 = retrieve_metadata('local-ipv4')
    raise(MovableInk::AWS::Errors::EC2Required) if ipv4.empty?
    ipv4
  end
end

#retrieve_metadata(key) ⇒ Object 



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# File 'lib/movable_ink/aws/metadata.rb', line 15

def retrieve_metadata(key)
  request = Net::HTTP::Get.new("/latest/meta-data/#{key}")
  request['X-aws-ec2-metadata-token'] = imds_token
  response = http.request(request)
  response.body
rescue
  ""
end