No iso9660 support in Docker for Mac kernel

Docker Desktop for Mac
1

Expected behavior

Mount an iso9660 filesystem via loopback. Identical code works on docker-machine Virtualbox and VMware Fusion

Actual behavior

“mount: unknown filesystem type ‘iso9660’”

And:

$ docker run -ti ubuntu:xenial /bin/bash
root@5cb2d83c2104:/# egrep iso /proc/filesystems
root@5cb2d83c2104:/#

It looks very much like iso9660 is just not in the kernel.

Information

No-change invocation of a (Rancher) Dapper make fails on Docker for Mac, works fine on Docker Machine on Virtualbox or VMware, and on native (Docker Inc. repository) docker on Ubuntu Xenial x86_64.

Steps to reproduce the behavior

  1. Attempt to mount any iso9660 filesystem in a container on Docker for Mac
  2. Fail with “mount: unknown filesystem type ‘iso9660’”
2

Hi André, iso9660 support is not currently supported in the Docker for Mac beta. We may add this in when we update the Linux kernel in an upcoming release.

3

Ok, thanks for the confirmation.