I m using delayed_job with capistrano and would like a way to start delayed_job on startup of the web application using the script/delayed_job start . This way capistrano can restart it on deploy. If the server gets rebooted then my delayed_jobs should start up with the project.
How can I do this? Should I be looking at doing this in the environment files or as an initializer?
You should create one recipe with the restart command.
namespace :delayed_job do
desc "Restart the delayed_job process"
task :restart, :roles => :app do
run "cd #{current_path}; RAILS_ENV=#{rails_env} script/delayed_job restart"
end
end
Then you add it to be executed at the end of your deployment.
after "deploy:update_code", "delayed_job:restart"
In combination with the capistrano restart recipe it s quite convenient to use cron to also start the delayed_job daemon at startup using the special @reboot time in a crontab:
@reboot /bin/bash -l -c cd /path/to/app && RAILS_ENV=production script/delayed_job restart
And it s even more convenient together with whenever to configure a scheduled task:
job_type :envcommand, cd :path && RAILS_ENV=:environment :task
every :reboot do
envcommand script/delayed_job restart
end
Not sure if all implementation of cron actually only run @reboot at system startup but at least Ubuntu seams to only run them at start up and not whenever the cron daemon start or restart. If you pass restart to script/delayed_job it will probably work in either case.
A bit late to this question, but version 2.1.4 of delayed_job has capistrano recipes:
https://github.com/collectiveidea/delayed_job/wiki/Rails-3-and-Capistrano
It s Damien Mathieu s answer, but already part of the delayed_job gem.
This now works with both Rails 2 and 3:
In deploy.rb, add the following lines:
require "delayed/recipes"
set :rails_env, production #added for delayed_job
before "deploy:restart", "delayed_job:stop"
after "deploy:restart", "delayed_job:start"
after "deploy:stop", "delayed_job:stop"
after "deploy:start", "delayed_job:start"
It s possible to boot & monitor delayed_job with monit:
How to monitor delayed_job with monit
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