How does container-image work

[kolrami]

Hi, not sure if the discussions here are actively used, but let my try to start the first one :)

I tried out the RBE with the docker deployment example and in principal it works. However, the image in the GHCR seems to be very limited and e.g. does not contain /bin/bash. Therefore, i would like to use a specific docker container image for running my remote jobs. I saw there is the container-image platform option but I am not sure how it is supposed to work.

• I know from other systems that the remote worker will use this property to spawn a docker container in which the action then runs. However, this seems to be not the case here and I do not see any evidence in the source code that shows me that the worker has any possibility to do this?
• Or is the platform option more ment for selecting a worker that runs already inside the given image? Such that only matching workers will be selected? That would not really match to the "priority" type given for that platform option.

Can you give some hint on how the container-image should work? Or whether I have some misunderstanding here?