Heroku Scheduler not creating log

Question

I recently set up the Scheduler add on and set up my rake task, 'rake cron_jobs:my_task'.

When I test it with 'heroku run rake cron_jobs:my_task', it works fine.

The scheduler also claims it ran when it was supposed to, and is scheduled to run again, but there's no logging associated with the process the way https://devcenter.heroku.com/articles/scheduler#inspecting-output says there should be.

'heroku ps' shows no scheduled dynos, 'heroku logs --ps scheduler.1' has no output.

What am I missing?

Answer 1

Actually I was trying to solve this myself, and did not find the answer anywhere, so here it is if someone else is struggling with this:

heroku logs --tail --ps scheduler

--tail is important to keep streaming the logs.

Answer 2

My best guess: the heroku ps and heroku logs commands only give you status logs for currently running processes/dynos.

So after the scheduled rake task is done, you can't reach the logs through the command line.

You can access the history of your logs by using one of the logging addons. Most of them offer a free tier too.

They all are based on the log drains which you also could use directly, if you want to build it yourself.