mount fails using --live option when ran from a container

[TomasTomecek]

I am trying to do atomic mount from within a container (running test suite from a container):

$ docker run -d --name toy -i registry.fedoraproject.org/fedora:26 cat
$ docker run --rm -v /dev:/dev --privileged -ti -v /var/run/docker.sock:/var/run/docker.sock fedora-26-with-atomic bash
[root@fe9791ea85fd tests]# mkdir /q
[root@fe9791ea85fd tests]# atomic mount toy /q
[root@fe9791ea85fd tests]# atomic umount /q
[root@fe9791ea85fd tests]# atomic mount --live  /q
Could not mount docker container:
/usr/bin/mount -o context="system_u:object_r:container_file_t:s0:c40,c575" /dev/mapper/docker-253:0-268692144-a3664f544938f254dce6da8903a1e2ae06626a950a48c6d0e1ac1948f527dfc2 /q
mount: /q: wrong fs type, bad option, bad superblock on /dev/mapper/docker-253:0-268692144-a3664f544938f254dce6da8903a1e2ae06626a950a48c6d0e1ac1948f527dfc2, missing codepage or helper program, or other error.

atomic-1.19.1-4.fc28.x86_64

[rhatdan]

I have a feeling this will not work well. @rhvgoyal Any ideas.