Instrumenting Rails with PrometheusTo do so we can introduce a “type collector”: # lib/global_type_collector.rb unless defined? Rails require File.expand_path("../../config/environment", __FILE__) end require 'raindrops' class GlobalPrometheusCollector < PrometheusExporter::Server::TypeCollector include PrometheusExporter::Metric def initialize @web_queued = Gauge.new("web_queued", "Number of queued web requests") @web_active = Gau
