Class: NewRelic::Agent::Utilization::AWS

Inherits:
Vendor
  • Object
show all
Defined in:
lib/new_relic/agent/utilization/aws.rb

Constant Summary collapse

IMDS_BASE_URL = 
'http://169.254.169.254/latest'.freeze
IMDS_KEYS = 
%w[instanceId instanceType availabilityZone].freeze
IMDS_TOKEN_TTL_SECS = 
'60'.freeze
TOKEN_OPEN_TIMEOUT_SECS = 
1.freeze
TOKEN_READ_TIMEOUT_SECS = 
1.freeze

Constants inherited from Vendor

Vendor::SUCCESS

Instance Attribute Summary

Attributes inherited from Vendor

#metadata

Class Method Summary collapse

Methods inherited from Vendor

#detect, endpoint, headers, #initialize, key_transforms, keys, processed_headers, vendor_name

Constructor Details

This class inherits a constructor from NewRelic::Agent::Utilization::Vendor

Class Method Details

.imds_token ⇒ Object 



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# File 'lib/new_relic/agent/utilization/aws.rb', line 18

def imds_token
  uri = URI.parse("#{IMDS_BASE_URL}/api/token")
  http = Net::HTTP.new(uri.hostname)
  http.open_timeout = TOKEN_OPEN_TIMEOUT_SECS
  http.read_timeout = TOKEN_READ_TIMEOUT_SECS
  response = http.send_request('PUT',
    uri.path,
    '',
    {'X-aws-ec2-metadata-token-ttl-seconds' => IMDS_TOKEN_TTL_SECS})
  unless response.code == Vendor::SUCCESS
    NewRelic::Agent.logger.debug('Failed to obtain an AWS token for use with IMDS - encountered ' \
                                 "#{response.class} with HTTP response code #{response.code} - " \
                                 'assuming non AWS')
    return
  end

  response.body
rescue Net::OpenTimeout
  NewRelic::Agent.logger.debug('Timed out waiting for AWS IMDS - assuming non AWS')
end