Setup Docker monitoring like in the tutorial video

CMK version: Docker Free Edition check-mk-free:2.1.0-latest
OS version: Debian 12

Error message:

Im trying to set up my first checkmk instance from my home network and I followed your video:

however I’m struggling with the installation at 03:00 in the video when I should install the docker library on my host (which is the same machine where the container is launching from).

The first thing that happens is that I’m being warned that my python environment is externally managed.

pip3 install docker

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

    See /usr/share/doc/python3.11/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

If I install it with the --break-system-packages flag nothing new shows up after updating the agent and doing a rescan on the host. Does anyone has an idea what I’m missing or doing wrong? Thank you for your replies!

You can run apt install python3-docker which has the needed Docker module.

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