Fix: Leading slash in fluentd graylog exporte logs 2

Author: mrnicegyu11

services/logging/fluentd/fluent.conf

@@ -35,12 +35,13 @@
 # Add additional metadata
 <filter docker.**>
   @type record_transformer
+  enable_ruby true
   <record>
     hostname "#{Socket.gethostname}"
     fluentd_hostname "#{ENV['FLUENTD_HOSTNAME']}"
     tag ${tag}
-    container_name ${record["container_name"] && record["container_name"].start_with?("/") ? record["container_name"][1..-1] : record["container_name"]}
-    log_service ${record["log_service"] && record["log_service"].start_with?("/") ? record["log_service"][1..-1] : record["log_service"]}
+    container_name ${record["container_name"].gsub(/^\/+/, "")}
+    log_service ${record["log_service"].gsub(/^\/+/, "")}
   </record>
 </filter>