Where do cron logs go?

[jfmatth]

Hello, thanks again for Dokku, great project!

I'm trying to move to Dokku, but can't find a log of my cron jobs. I don't know if they are running or not. From everything I check, it looks like they are in the crontab, the testing i do manually seems to be OK, but I would like to see logs.

thanks,

[vnorbix]

I don't know if you're referring to the application level cron jobs in app.json. In this case Dokku cron jobs are registered in your host system's cron service as the dokku user. Ubuntu based system you can check this with command sudo -u dokku crontab -e, dokku run command is used to execute the command you specify in app.json. To see the output of the job execution you can use command sudo grep CRON /var/log/syslog. Here I got No MTA installed, discarding output message, which suggested me to just redirect all the output (stdout and stderr) to a file on the host. Something like this would do:

mycommand &>> /var/log/myservice/somelog.txt

The myservice directory here need to be writeable by the dokku user.

[cba85]

Thank you, your reply helped me too!

I've added postfix to log my Dokku crons. I've used this tutorial: https://cronitor.io/guides/no-mta-installed-discarding-output

Hope it would help someone else!