[Question] how to reduce Docker image size

[tamuanand]

Hi @apeltzer

We have exchanged messages here: #28 (comment)

A related question:

I am relatively new to Nextflow and using NF with Docker. As a general rule, how big can the Docker image can be before it is considered too large? I was wondering if you could help and share some guidelines?

If I do docker build with the environment.yml from nf-core/sarek or mag, the image size comes close to 2.4 GB. Is there a way to reduce the size of the image?

I tried some of these techniques too but it did not help:

https://uwekorn.com/2021/03/03/deploying-conda-environments-in-docker-cheatsheet.html
https://jcristharif.com/conda-docker-tips.html

I also tried with Micromamba, the size still of the final Docker image is pretty huge

https://github.com/mamba-org/micromamba-docker

Have you tried Mamba/Micromamba? I would be curious to know your findings

Thanks in advance.

[apeltzer]

The latest release should make this a bit easier to manage as it handles individual modules with individual containers - please have a look and reopen if required 👍🏻