#46 Add Prometheus exporter

config/environments/development.rb

@@ -1,24 +1,26 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Verifies that versions and hashed value of the package contents in the project's package.json
   config.webpacker.check_yarn_integrity = true
   # Settings specified here will take precedence over those in config/application.rb.
 
-  config.web_console.whitelisted_ips = '192.168.0.0/16'  
-  
+  config.web_console.whitelisted_ips = '192.168.0.0/16'
+
   # In the development environment your application's code is reloaded on
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
 
-  # Do not eager load code on boot.
-  config.eager_load = false
+  # Eager load code for prometheus exporter
+  config.eager_load = true
 
   # Show full error reports.
   config.consider_all_requests_local = true
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join('tmp', 'caching-dev.txt').exist?
+  if Rails.root.join('tmp/caching-dev.txt').exist?
     config.action_controller.perform_caching = true
 
     config.cache_store = :memory_store

config/environments/production.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Verifies that versions and hashed value of the package contents in the project's package.json
   config.webpacker.check_yarn_integrity = false
@@ -10,6 +12,7 @@ Rails.application.configure do
   # your application in memory, allowing both threaded web servers
   # and those relying on copy on write to perform better.
   # Rake tasks automatically ignore this option for performance.
+  # Eager load is also required for the prometheus exporter
   config.eager_load = true
 
   # Full error reports are disabled and caching is turned on.
@@ -90,8 +93,8 @@ Rails.application.configure do
   # require 'syslog/logger'
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
 
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
-    logger           = ActiveSupport::Logger.new(STDOUT)
+  if ENV['RAILS_LOG_TO_STDOUT'].present?
+    logger           = ActiveSupport::Logger.new($stdout)
     logger.formatter = config.log_formatter
     config.logger    = ActiveSupport::TaggedLogging.new(logger)
   end

config/environments/staging.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -11,9 +13,10 @@ Rails.application.configure do
   #       your application in memory, allowing both threaded web servers
   #       and those relying on copy on write to perform better.
   #       Rake tasks automatically ignore this option for performance.
-  config.eager_load = false
+  # Eager load code for prometheus exporter
+  config.eager_load = true
 
-  #enable web console in staging
+  # enable web console in staging
   config.web_console.development_only = false
 
   # Show full error reports and disable caching.

config/environments/test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -10,7 +12,8 @@ Rails.application.configure do
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that
   # preloads Rails for running tests, you may have to set it to true.
-  config.eager_load = false
+  # Eager load code for prometheus exporter
+  config.eager_load = true
 
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
@@ -47,7 +50,7 @@ Rails.application.configure do
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
 
-  #config.logger = Logger.new(STDOUT)
+  # config.logger = Logger.new($stdout)
   # Set log level
-  #config.log_level = :DEBUG
+  # config.log_level = :DEBUG
 end