FIX: Incorrect formatter used when logstash formatter is enabled.

config/initializers/101-lograge.rb

@@ -33,9 +33,7 @@ if (Rails.env.production? && SiteSetting.logging_provider == 'lograge') || ENV["
 
         {
           ip: ip,
-          username: username,
-          hostname: `hostname`,
-          pid: Process.pid
+          username: username
         }
       rescue => e
         Rails.logger.warn("Failed to append custom payload: #{e.message}\n#{e.backtrace.join("\n")}")

lib/discourse_logstash_logger.rb

@@ -10,6 +10,7 @@ class DiscourseLogstashLogger
         event['severity_name'] = event['severity']
         event['severity'] = Object.const_get("Logger::Severity::#{event['severity']}")
         event['type'] = type
+        event['pid'] = Process.pid
       },
     )
   end