Description:

We're facing a parsing issue in docker.py version 7.0, where registry server addresses with port numbers are incorrectly processed as part of the Docker tag, leading to an invalid tag format error.

Error:

it' happening in openstack kolla upstream CI:
docker.errors.DockerException: invalid tag 'primary:4000/lokolla/base:change_903165': invalid reference format

Possible issue:

The current regex introduced in commit: a9b5494
in docker.py does not accommodate port numbers in registry addresses:

_TAG = re.compile(
    r"^[a-z0-9]+((\.|_|__|-+)[a-z0-9]+)*(\/[a-z0-9]+((\.|_|__|-+)[a-z0-9]+)*)*" \
    + "(:[a-zA-Z0-9_][a-zA-Z0-9._-]{0,127})?$"
)