Not clear how to set/get config reliably without example about core

[iasdeoupxe]

Trusted domains are supposed to be set / configured only via OWNCLOUD_TRUSTED_DOMAINS according to:

https://doc.owncloud.com/server/10.13/admin_manual/installation/docker/

[jnweiger]

Docker is always special and defies our normal documentation.
The rule of thumb might be:

If you run into the situation "I did as documented, it does not change anything"
then examine the config/overwrite.config.php file inside you running docker container. There you learn the details about the environment variable that needs to be used instead.

Example:

docker exec -ti my_little_owncloud grep -i trusted_domains config/overwrite.config.php
  if (getenv('OWNCLOUD_TRUSTED_DOMAINS') != '') {
    $domain = array_map('trim', explode(',', getenv('OWNCLOUD_TRUSTED_DOMAINS')));
    'trusted_domains' => $domain,

[DeepDiver1975]

@mmattel something for the docs?

[icedwater]

Edit: Yes, but those didn't work for me at first, or I wouldn't have dug into the container. Let me add to the original question that the recommended docker .env approach failed when I followed the wrong instructions.

Thanks @iasdeoupxe for making me check again.

It would still be nice to furnish more examples for a provided command, though, especially since the default docker image doesn't have man pages.