Module: Datadog::Runtime::Container

Defined in:
lib/ddtrace/runtime/container.rb

Overview

For container environments

Defined Under Namespace

Classes: Descriptor

Constant Summary collapse

UUID_PATTERN = 
'[0-9a-f]{8}[-_]?[0-9a-f]{4}[-_]?[0-9a-f]{4}[-_]?[0-9a-f]{4}[-_]?[0-9a-f]{12}'.freeze
CONTAINER_PATTERN = 
'[0-9a-f]{64}'.freeze
POD_REGEX = 
/(pod)?(#{UUID_PATTERN})(?:.slice)?$/
CONTAINER_REGEX = 
/(#{UUID_PATTERN}|#{CONTAINER_PATTERN})(?:.scope)?$/

Class Method Summary collapse

Class Method Details

.container_id ⇒ Object 



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# File 'lib/ddtrace/runtime/container.rb', line 26

def container_id
  descriptor.container_id
end

.descriptor ⇒ Object 



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# File 'lib/ddtrace/runtime/container.rb', line 34

def descriptor
  @descriptor ||= begin
    Descriptor.new.tap do |descriptor|
      begin
        Cgroup.descriptors.each do |cgroup_descriptor|
          # Parse container data from cgroup descriptor
          path = cgroup_descriptor.path
          next if path.nil?

          # Split path into parts
          parts = path.split('/')
          parts.shift # Remove leading empty part
          next if parts.length < 2

          # Read info from path
          platform = parts[0]
          container_id = parts[-1][CONTAINER_REGEX]
          task_uid = parts[-2][POD_REGEX]

          # If container ID wasn't found, ignore.
          # Path might describe a non-container environment.
          next if container_id.nil?

          descriptor.platform = platform
          descriptor.container_id = container_id
          descriptor.task_uid = task_uid

          break
        end
      rescue StandardError => e
        Datadog::Tracer.log.error(
          "Error while parsing container info. Cause: #{e.message} Location: #{e.backtrace.first}"
        )
      end
    end
  end
end

.platform ⇒ Object 



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# File 'lib/ddtrace/runtime/container.rb', line 22

def platform
  descriptor.platform
end

.task_uid ⇒ Object 



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# File 'lib/ddtrace/runtime/container.rb', line 30

def task_uid
  descriptor.task_uid
end