#46 Add Prometheus exporter

config/initializers/prometheus.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+return unless CodeOcean::Config.new(:code_ocean).read[:prometheus_exporter][:enabled]
+return if Rake.application.top_level_tasks.to_s.include?('db:')
+
+# Add metric callbacks to all models
+ApplicationRecord.include Prometheus::Record
+
+# Initialize the counters according to the db
+Prometheus::Controller.initialize_metrics