Docker image for cwltool does not work on Docker v17.06.2-ce-mac27

[tom-tan]

The following command does not work on Mac OSX with Docker Community Edition v17.06.2-ce-mac27:

$ docker run --privileged -ti --rm commonworkflowlanguage/cwltool

Expected Behavior

It shows the help message for cwltool.

Actual Behavior

It shows an error message and the help message for docker before showing the help message for cwltool.
I guess it is not an intended behavior.

$ docker run --privileged -ti --rm commonworkflowlanguage/cwltool                                                       master
/dev/mapper/control: open failed: No such device
Failure to communicate with kernel device-mapper driver.
Check that device-mapper is available in the kernel.
Command failed
ln: failed to create symbolic link '/sys/fs/cgroup/systemd/name=systemd': Operation not permitted
ln: failed to create symbolic link '/sys/fs/cgroup/openrc/name=openrc': Operation not permitted
unknown shorthand flag: 'd' in -d
See 'docker --help'.

Usage:  docker COMMAND

A self-sufficient runtime for containers

Options:
      --config string      Location of client config files (default

 ...

  wait        Block until one or more containers stop, then print their exit codes

Run 'docker COMMAND --help' for more information on a command.

Timed out trying to connect to internal docker host.
/usr/local/bin/cwltool 1.0

CWL document required, no input file was provided
usage: cwltool [-h] [--basedir BASEDIR] [--outdir OUTDIR] [--no-container]
...

[osallou]

unfortunatly, this is a Docker for MAC issue, not container related.
But do you really need the privileged flag ? Should be of no use for cwltool.

[tom-tan]

I confirmed that the same issue happens when I omit --privileged option.

But do you really need the privileged flag ?

The cwltool image needs privileged option because it internally uses Docker-in-Docker to support containerized tools.

Also, the above options are suggested in the description in DockerHub. Therefore the provided cwltool image should work with the suggested options or the description has to be fixed.