Environment variables substitution within environment variables

[ramnes (Guillaume Gelin)]

Hey there!

I would like to reference one or more environment variables within another variable. My use case is to replace the default database name in Qovery’s MongoDB database URL (the /admin part).

Being able to set a value like this would be very nice:

mongodb://${QOVERY_MONGODB_ABC123_LOGIN}:${QOVERY_MONGODB_ABC123_PASSWORD}@{QOVERY_MONGODB_ABC123_HOST_INTERNAL}:27017/my_database_name

(I obviously tried this form of basic substitution and the magic didn’t happen!)

I couldn’t find anything similar in the documentation or the forum, is it something that is implemented in a way or another, or that you may want to add at some point?

[rophilogene (Romaric Philogene)]

Hi @ramnes ,

This is something we plan to add. I don’t have ETA yet but here is a workaround that you can follow at the moment.

Provide full URL of deployed app in Environment

Hi @emmanuelcohenlaroque , I am looking with the team since it’s a very common request (until we support environment variable substitution/interpolation). In the meantime, I would highly suggest creating your expected environment variable in your Dockerfile. E.g. you can do this: FROM ... ARG BE_HOST ENV HTTPS_BE_HOST "https://${BE_HOST}" ... your build commands This way for your application it’s transparent.

[ramnes (Guillaume Gelin)]

Doesn’t work very well in my situation as I want to minimize the changes to the codebase. I ended up building up the environment variable myself and just saving it as is.

[ramnes (Guillaume Gelin)]

Just found this on the roadmap, nice! Although, it is tagged for Q2 2022 and we’re in Q3. (I’m just nitpicking, there’s nothing urgent about it.)

Edit: fixed the link

[rophilogene (Romaric Philogene)]

I see with the team (you’re right to be nitpicking)