(PE-27794) add a puma status app

.rubocop.yml

@@ -37,7 +37,7 @@ Style/NumericPredicate:
 Layout/EmptyLineAfterGuardClause:
   Enabled: false
 
-Layout/IndentHeredoc:
+Layout/HeredocIndentation:
   Enabled: false
 
 Layout/ClosingHeredocIndentation:

config/transport_tasks_config.rb

@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
-####################################################
-## DO NOT EDIT THIS FILE                          ##
-## Use /etc/puppetlabs/ace/conf.d/ace-server.conf ##
-## to configure the sinatra server                ##
-####################################################
+###########################################################
+## DO NOT EDIT THIS FILE                                 ##
+## Use /etc/puppetlabs/ace-server/conf.d/ace-server.conf ##
+## to configure the sinatra server                       ##
+###########################################################
 
 require 'ace/transport_app'
 require 'ace/config'
@@ -47,3 +47,24 @@
 end
 
 app impl
+
+#### Metrics/Status
+
+control_token = 'none'
+control_url_https = bind_addr.sub(config['port'].to_s, config['status-port'].to_s).sub('force_peer', 'none')
+
+# Start either the default Puma Control/Status app (if it supports our 'auth_actions' feature)
+# or start our custom Puma Status app via our custom 'stats' app/plugin (shipped in the Bolt gem).
+
+if defined? auth_actions
+  control_actions = 'gc-stats,stats'
+  activate_control_app control_url_https, auth_token: control_token, auth_actions: control_actions
+else
+  begin
+    plugin 'stats'
+    stats_url control_url_https
+    stats_token control_token
+  rescue UnknownPlugin
+    puts '* Status endpoint disabled'
+  end
+end

lib/ace/config.rb

@@ -25,6 +25,7 @@ def int_keys
     def defaults
       super.merge(
         'port' => 44633,
+        'status-port' => 44632,
         'concurrency' => 10,
         'cache-dir' => "/opt/puppetlabs/server/data/ace-server/cache",
         'puppet-server-conn-timeout' => 120,

spec/unit/ace/config_spec.rb

@@ -52,6 +52,7 @@ def build_config(config_file, from_env = false)
                               'ECDHE-ECDSA-AES128-SHA256',
                               'ECDHE-RSA-AES128-SHA256'],
       'port' => 44633,
+      'status-port' => 44632,
       'concurrency' => 10,
       'cache-dir' => "/opt/puppetlabs/server/data/ace-server/cache",
       'puppet-server-conn-timeout' => 120,