Dokku remove worker without finishing tasks

Question

I have Ruby on Rails app and after I do any deployment with Dokku, I have my old worker running the tasks normally, but when I complete the deploy, after a few seconds this worker is removed and a new one is created without finishing all the tasks that were running. Does anyone know how I get around this? Or that the worker finishes all tasks before removing, or when a worker is created after deploying, the tasks from the old worker go to the new worker? Any indication?

Answer 1

I managed to solve it with a workaround, I created a check_worker.rb file that I call in the predeploy, it silences the workers so as not to take any more tasks, and while there is a worker with tasks being executed, it does not advance with the deploy until it completes all, only after completing all the tasks it completes the deploy

app.json

{
  "scripts": {
    "dokku": {
      "predeploy": "ruby check_worker.rb"
    }
  }
}

check_worker.rb

#!/usr/bin/env ruby
require 'sidekiq'
require 'sidekiq/api'
ps = Sidekiq::ProcessSet.new
ps.each(&:quiet!)
workers = true
while workers
  works = []
  active_workers = Sidekiq::Workers.new.map do |_process_id, _thread_id, work|
    works = work
  end
  workers = works.length > 0
  if workers
    sleep 2
  end
end