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Can you map ./ to ./ for a docker image? (lemmy.mindoki.com)

submitted 6 months ago* (last edited 6 months ago) by [email protected] to c/[email protected]

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Hello all!

Can you mount any folder a docker image is running in?

So for example, if I have a python script creating a file "./hello.txt", it would be written in the folder where I launch "docker-compose up" ?

I have figured out how to write the hello.txt to a subfolder like /data/ (by mapping an image-local folder to /data/), but I'd like to use like ./ for the image itself instead. So that the folder I'm launching the docker-compose in on my PC is mapped to ./ in the image, if that makes more sense.

So this works (in the compose.yml):

volumes:

  - ./:/data

but the script must write to "./data/hello.txt"

This doesn't work:

volumes:

  - ./:./

It pops an error: mount path must be absolute

Any idea if this is even possible?

Cheers and thanks !

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[–] [email protected] 4 points 6 months ago

Even if ./:./worked you want to be explicit with your container directories. . refers to the current directory and that will change based on what you define as your working directory or whatever the base image uses as a working directory. In other words, it's kind of brittle.