Ray cluster setup with Docker

How severe does this issue affect your experience of using Ray?

  • High: It blocks me to complete my task.

It took me a while to figure this out, but I realized that when I use custom Docker images, the ray up command doesn’t seem to even install Docker on the worker machines. However when I use the official ray images things work! This is odd because my custom Docker image is just ten lines or so change from the official image.
quokka/problem.yaml at master · marsupialtail/quokka · GitHub doesn’t work but quokka/problem.yaml at master · marsupialtail/quokka · GitHub works.

The docker image is public if you guys want to reproduce this issue.