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Release error: Failed to create cookie file '/.erlang.cookie'

#releases#mix-release#cookies
superruzafa

superruzafa

Release error: Failed to create cookie file '/.erlang.cookie'

Hi, this is the first time I migrated the release system for a distributed app from Distillery to Elixir releases.

I’m building a docker image containing the release but when I launch it I’m getting this error:

=ERROR REPORT==== 16-Aug-2023::14:04:26.370926 ===
Failed to create cookie file '/.erlang.cookie': eacces
=CRASH REPORT==== 16-Aug-2023::14:04:26.377384 ===

I tried to create a writable /.erlang.cookie file with some contents but it didn’t work.

Creating a release in the past with just Elixir releases has not been a problem, but this time I don’t know how to fix this error.

6 comments
#releases
0 1586 6

Marked As Solved

superruzafa

superruzafa

It seems that the Erlang restringes the location of the erlang.cookie file, it will be created in the $HOME directory.

What happened is that $HOME was set to /

Once I changed it in the Dockerfile, the file could be created and the app booted!

ENV HOME=/app

Thanks you all guys!

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