18794: Add /metrics endpoint to RailsAPI.

[arvados.git] / services / api / app / controllers / arvados / v1 / management_controller.rb

diff --git a/services/api/app/controllers/arvados/v1/healthcheck_controller.rb b/services/api/app/controllers/arvados/v1/management_controller.rb
similarity index 54%
rename from services/api/app/controllers/arvados/v1/healthcheck_controller.rb
rename to services/api/app/controllers/arvados/v1/management_controller.rb
index c56208207787526b8089239c50a31f34b1cafa23..55a00d346349cc53d951ad597044cd972852f1fb 100644 (file)
--- a/services/api/app/controllers/arvados/v1/healthcheck_controller.rb
+++ b/services/api/app/controllers/arvados/v1/management_controller.rb
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: AGPL-3.0
 
-class Arvados::V1::HealthcheckController < ApplicationController
+class Arvados::V1::ManagementController < ApplicationController
   skip_before_action :catch_redirect_hint
   skip_before_action :find_objects_for_index
   skip_before_action :find_object_by_uuid
@@ -29,8 +29,24 @@ class Arvados::V1::HealthcheckController < ApplicationController
     end
   end
 
-  def ping
-    resp = {"health" => "OK"}
-    send_json resp
+  def metrics
+    render content_type: 'text/plain', plain: <<~EOF
+# HELP arvados_config_load_timestamp_seconds Time when config file was loaded.
+# TYPE arvados_config_load_timestamp_seconds gauge
+arvados_config_load_timestamp_seconds{sha256="#{Rails.configuration.SourceSHA256}"} #{Rails.configuration.LoadTimestamp.to_f}
+# HELP arvados_config_source_timestamp_seconds Timestamp of config file when it was loaded.
+# TYPE arvados_config_source_timestamp_seconds gauge
+arvados_config_source_timestamp_seconds{sha256="#{Rails.configuration.SourceSHA256}"} #{Rails.configuration.SourceTimestamp.to_f}
+EOF
+  end
+
+  def health
+    case params[:check]
+    when 'ping'
+      resp = {"health" => "OK"}
+      send_json resp
+    else
+      send_json ({"errors" => "not found"}), status: 404
+    end
   end
 end