Contents

module Appsignal
  module System
    def self.container?
      heroku? || Container.id
    end

    def self.heroku?
      ENV.key? "DYNO".freeze
    end

    module Container
      CGROUP_FILE = "/proc/self/cgroup".freeze

      class << self
        def id
          case cgroups
          when %r{docker[-|/]([0-9a-f]+)}
            $1
          when %r{lxc/([0-9a-f-]+)$} # LXC / Heroku
            $1
          end
        end

        private

        def cgroups
          file = CGROUP_FILE
          return unless File.exist? file

          File.read(file)
        rescue SystemCallError => e
          Appsignal.logger.debug "Unable to read '#{file}' to determine cgroup"
          Appsignal.logger.debug e
        end
      end
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
appsignal-2.1.2	lib/appsignal/system.rb
appsignal-2.1.1	lib/appsignal/system.rb
appsignal-2.1.1.beta.1	lib/appsignal/system.rb
appsignal-2.1.0	lib/appsignal/system.rb
appsignal-2.1.0.beta.1	lib/appsignal/system.rb