Question about accessing the docker-in-docker service

Does someone know how i can access the dind service form child contains?

In my example i use dind to run a container, that itself should start a new container (sibling or child doesn’t matter).

GitLab CI

  • DIND Service
  • Container A (how to access dind and pass it into container b - by link or socket?)
    – Container B

How is this possible?