Login inside a github action

Code to Cloud GitHub Actions
#1

Hi! I am building a github action that uses a docker image. To download that image, it requires authentication.

I have tried to do a docker login in the wf before calling that action, but i am still receiving an unauthorised error. Any idea what should i do? Should i do the authentication inside the action itself?

My action has this inside:

runs:
using: ‘docker’
image: ‘docker://myproject/miimage:latest’
args:
…

How should i do the authentication?

Thanks

#2

I don’t think you can, the only options described in the documentation are using a Dockerfile in your repository, or using a public image:

#3

Thats a big limitation… is there any way to make it work with the pre tag? It is, do a docker login with a PAT sent as input? Would it work?

#4

pre-entrypoint uses the same image, so I’m pretty sure it won’t. I also just noticed the runs.image documentation explicitly says:

The value can be the Docker base image name, a local Dockerfile in your repository, or a public image in Docker Hub or another registry.

Which makes it pretty clear that private images are not supported.

#5

Thanks. Do you know what is the best way to ask github if this will be supported? Do they usually answer here or do i need to raise an issue to any git where they manage new features?

#6

There are some Github people around here, so I hope they’ll see it. I don’t see any obvious category for feature requests on the contact page.

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