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Ryan Ong

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How to split up rails 3.x logger by unicorn workers

TLDR: Put this in your unicorn config. Make sure not to have duplicate after_fork calls

after_fork do |server, worker| if defined?(ActiveSupport::TaggedLogging) && Rails.logger.kind_of?(ActiveSupport::TaggedLogging) Rails.logger.instance_eval do level = @logger.level # flush and close logger to make sure we don't cut off any potential logging before this @logger && @logger.flush && @logger.close @logger ="log", "rails_#{Rails.env}.#{}.log").to_s, level) end elsif Rails.logger.kind_of?(ActiveSupport::BufferedLogger) Rails.logger.instance_eval do @log && @log.flush && @log.close @log_path = Rails.root.join("log", "rails_#{Rails.env}.#{}.log").to_s if respond_to?(:open_logfile, true) @log = open_logfile(@log_path) elsif respond_to?(:open_log, true) if File.exist?(@log_path) @log = open_log(@log_path, (File::WRONLY | File::APPEND)) else FileUtils.mkdir_p(File.dirname(@log_path)) @log = open_log(l@log_path, (File::WRONLY | File::APPEND | File::CREAT)) end end end end end How this works!

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