Invalid cgroup-parent slice name

[fpoltronieri]

I installed ContainerNet on Ubuntu 22.04 following the instructions for a Bare-metal installation (Option 1).
When running the example:
sudo python3 examples/containernet_example.py

I got the following error:
File "/usr/local/lib/python3.10/dist-packages/docker/[errors.py](http://errors.py/)", line 31, in create_api_error_from_http_exception raise cls(e, response=response, explanation=explanation) docker.errors.APIError: 400 Client Error: Bad Request ("cgroup-parent for systemd cgroup should be a valid slice named as "xxx.slice".

So, after digging a bit, I found out that ContainerNet was creating a cgroup-parent with an unsupported naming convention.
Changing the value of the cgroup-parent variable in containernet/mininet/node.py
from: /docker
to: docker.slice
fixed the error.

Could you please upload the main branch or do I need to create a merge request?

Bests,
Filippo

[Silaltrex]

Thank you, I've had the same issue since last week, and didn't really know how to fix it, your fix has worked well for me to !