Module: XRay::Plugins::EC2

Includes:
Logging
Defined in:
lib/aws-xray-sdk/plugins/ec2.rb

Overview

A plugin that gets the EC2 instance-id and AZ if running on an EC2 instance.

Constant Summary collapse

ORIGIN = 
'AWS::EC2::Instance'.freeze
ID_ADDR =

docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html#instancedata-data-retrieval

'http://169.254.169.254/latest/meta-data/instance-id'.freeze
AZ_ADDR = 
'http://169.254.169.254/latest/meta-data/placement/availability-zone'.freeze

Class Method Summary collapse

Methods included from Logging

#logger, logger, logger=

Class Method Details

.aws ⇒ Object 



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# File 'lib/aws-xray-sdk/plugins/ec2.rb', line 15

def self.aws
  @@aws ||= begin
    instance_id = open(ID_ADDR, open_timeout: 1).read
    az = open(AZ_ADDR, open_timeout: 1).read
    {
      ec2: {
        instance_id: instance_id,
        availability_zone: az
      }
    }
  rescue StandardError => e
    # Two attempts in total to get EC2 metadata
    @retries ||= 0
    if @retries < 1
      @retries += 1
      retry
    else
      @@aws = {}
      Logging.logger.warn %(can not get the ec2 instance metadata due to: #{e.message}.)
    end
  end
end