Geo: Allow Geo log cursor to log output to stdout

ee/bin/geo_log_cursor

@@ -19,6 +19,7 @@ class GeoLogCursorOptionParser
     op.separator 'Usage: ./geo_log_cursor [options]'
     op.separator ''
     op.on('-d', '--debug', 'Enable detailed logging with extra debug information') { options[:debug] = true }
+    op.on('--stdout-logging', 'Log output to stdout') { options[:stdout_logging] = true }
 
     op.separator 'Common options:'
     op.on('-h', '--help') do
@@ -40,11 +41,24 @@ class GeoLogCursorOptionParser
   end
 end
 
+module StdoutLogger
+  def full_log_path
+    STDOUT
+  end
+end
+
 if $0 == __FILE__
   options = GeoLogCursorOptionParser.parse(ARGV)
 
   # We load rails environment / initializers only here to get faster command line startup when `--help` and `--version`
   require rails_path('config/environment.rb')
 
+  if options[:stdout_logging]
+    # Monkey patch the logging class because multiple places use it (that
+    # contain mostly class methods) and is not possible to pass
+    # options[:stdout_logging] around without a refactor.
+    Gitlab::Geo::Logger.extend(StdoutLogger)
+  end
+
   Gitlab::Geo::LogCursor::Daemon.new(options).run!
 end

ee/changelogs/unreleased/13413-geo-allow-the-log-cursor-to-log-to-stdout.yml

+---
+title: "Geo: Don't wait when exiting the log cursor"
+merge_request: 15070
+author:
+type: performance