Invalid Hostname

[ambsw-technology]

When testing the following script as part of #13, I was getting an invalid hostname error.

from dockermap.map.container import ContainerMap
from dockermap.map.input import ContainerLink
from dockerfabric.apiclient import docker_fabric, container_fabric

maps = ContainerMap('test_map', {
    'host_root': '~',
    'u1': {
        'image': 'ubuntu:latest',
    }
})

container_fabric_inst = container_fabric(container_maps=maps)
container_fabric_inst.startup('u1')

[ambsw-technology]

Eventually, I determined that this is due to changes in the acceptable characters in docker. The underscore that was previously valid is no longer so. Removing the underscore from the container map name resolve the issue.