如何使用CRON定期运行rake任务？

Question

I've written a rake task for my Rails application and I'd need to run this tasks regularly with using CRON.

If I have a URL that I need to ping with CRON, I do it like this:

0 */6 * * * curl https://www.website.com/something

But how to "ping" a rake task?

The application is located in /home/deployer/apps/myapp-production/current and is running on DigitalOceal (Ubuntu server - nginx).

Thanks.

EDIT: This is my command:

0 */6 * * * cd /home/deployer/apps/myapp-production/current && RAILS_ENV=production bundle exec rake db:backup

But the output is:

/bin/sh: 1: bundle: not found

When I run just rake db:backup on my laptop (locally), everything works just well.

Do I have incorrect the path in the CRON task?

EDIT2: When I run the command cd /home/deployer/apps/myapp-production/current && RAILS_ENV=production bundle exec rake db:backup manually from the command line, everything is working, but not from the CRON.

Answer 1

Use whenever gem. It provides nice DSL like:

every :day, :at => '12:20am', :roles => [:app] do
  rake "app_server:task"
end