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Versions: 18
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Contents
# frozen_string_literal: true
require_relative 'ext'
module Datadog
module Core
module Environment
# Reads information from Linux cgroups.
# This information is used to extract information
# about the current Linux container identity.
# @see https://man7.org/linux/man-pages/man7/cgroups.7.html
module Cgroup
LINE_REGEX = /^(\d+):([^:]*):(.+)$/.freeze
Descriptor = Struct.new(
:id,
:groups,
:path,
:controllers
)
module_function
def descriptors(process = 'self')
[].tap do |descriptors|
begin
filepath = "/proc/#{process}/cgroup"
if File.exist?(filepath)
File.foreach("/proc/#{process}/cgroup") do |line|
line = line.strip
descriptors << parse(line) unless line.empty?
end
end
rescue StandardError => e
Datadog.logger.error(
"Error while parsing cgroup. Cause: #{e.class.name} #{e.message} Location: #{Array(e.backtrace).first}"
)
end
end
end
def parse(line)
id, groups, path = line.scan(LINE_REGEX).first
Descriptor.new(id, groups, path).tap do |descriptor|
descriptor.controllers = groups.split(',') unless groups.nil?
end
end
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems