proctitle_for_rails.rb

# Add info in the ps listing of rails server and delayed jobs processes
# app/controllers/application_controller.rb

  before_action :proctitle                                                                                                                                         
  after_action  :unproctitle                                                                                                                                       
                                                                                                                                                  
  def proctitle                                                                                                                                                    
    path = request.env['REQUEST_PATH']&.first(25)                                                                                                                  
    Process.setproctitle("#{$PROGRAM_NAME} - #{path}")                                                                                                             
  end                                                                                                                                                              
                                                                                                                                                                   
  def unproctitle                                                                                                                                                  
    Process.setproctitle($PROGRAM_NAME)                                                                                                                            
  end                                                                                                                                                              

# config/initializers/delayed_job

require 'delayed_job'                                                                                                                                              
class ProctitleDelayedPlugin < Delayed::Plugin                                                                                                                     
  callbacks do |lifecycle|                                                                                                                                         
    lifecycle.around(:invoke_job) do |job, *args, &block|                                                                                                          
      Process.setproctitle("#{$PROGRAM_NAME} #{job.id} #{job.name.split.first} #{job.attempts.ordinalize}")                                                        
      block.call(job, *args)                                                                                                                                       
      Process.setproctitle($PROGRAM_NAME)                                                                                                                          
    end                                                                                                                                                            
  end                                                                                                                                                              
end                                                                                                                                                                
                                                                                                                                                                   
Delayed::Worker.plugins << ProctitleDelayedPlugin