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I'm on Ubuntu 16.04 server edition. I had my user added to dokku group 2 days ago just to do periodical postgres backup without needing provide password in cron. I've added user to dokku group by this command: 

sudo usermod -aG dokku myuser

Backup files was properly generated every hour.... but tonight all generated files are empty - what I had noticed that user is no longer in dokku group. Adding user to dokku group again helps, but I don't know what could be the reason of disappearing dokku group from user's groups list ?

psagan
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1 Answers1

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After deep investigation of logs I've found the problem:

I've installed dokku plugin for letsencrypt and installation process removed my user from dokku group. I was able to replicated this on my other server and here is what happens:

> groups myuser
myuser sudo docker dokku

> sudo dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git
...
Adding user dokku to group adm
... other plugin installation info

> groups myuser
myuser sudo docker

I've shared this info on dokku channel for further investigation. Hope it will be helpful for others who experienced this problem.

psagan
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