Question: What if I execute docker run in workflow?

[kingluo]

It seems that the act itself runs in docker, not like the real github workflow uses vm.
What if I execute docker run in workflow yaml (It's a common case, because many CI depends on docker or docker-compose to setup test env)? Does it involve "docker in docker" issue?

If so, could act run container from containerd directly just like what kind does?

[KnisterPeter]

Act mounts the docker socket of the host and starts new containers on the host thereof.

[kingluo]

act/pkg/runner/run_context.go

Line 86 in e1b9068

fmt.Sprintf("%s:%s", rc.Config.ContainerDaemonSocket, "/var/run/docker.sock"),

Here, right?

Side question, if all containers comes from host, then how act manage the network to allow access between the container where the workflow resides in and other dependent containers correctly?