Please mention RABBITMQ_DEFAULT_USER / RABBITMQ_DEFAULT_PASS in the Readme

[klamann]

I just stumbled upon #508 after I tried to figure out how I can provide a username and password to RabbitMQ 3.9 in a GitLab CI pipeline.

So the Readme says that the use of environment variables to configure RabbitMQ is not possible anymore, but then in rabbitmq-server#3299, support for the variables RABBITMQ_DEFAULT_VHOST, RABBITMQ_DEFAULT_USER and RABBITMQ_DEFAULT_PASS was added.

Can you mention this in the Readme on Dockerhub? There are quite a few situations (like GitHub Actions or GitLab CI) where mounting config files is not an option and it would be nice if the Readme helped with that.

[wglambert]

This PR docker-library/docs#2012 removed the newly supported variables from the disallowed list. So users would be able to see the complete list of supported variables at https://www.rabbitmq.com/configure.html#supported-environment-variables

Seems like their docs weren't updated yet with the new supported variables

[klamann]

yeah, it's not in the offcial documentation, would be nice if it was updated.
But there's basically two pieces of information I'm looking for in the Readme of any docker image:

• which tag should I use?
• how can I specify credentials?

The current Readme does a really good job with the tags, but there is no information to be found regarding credentials, other than a link to a convoluted page which tells you (incorrectly) that the only way to change the password is to mount a config file.

I think it would be very helpful to mention these 3 variables in the Readme.

[michaelklishin]

FYI: rabbitmq/rabbitmq-website@ec238a2. RabbitMQ docs are open source, so changes similar to the above one can be contributed by anyone ;)

[vgoklani]

Why were the environment variables removed?