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System Upgrades

Brewblox is designed to be compatible with the majority of Linux-based systems. To achieve this, it has three major dependencies: Docker, Docker Compose, and Python. Both are available on most operating systems, but released versions have an End of Life (EOL) date. Beyond this date, they are no longer supported, and compatibility is no longer guaranteed.

After an EOL date, tooling or dependencies may suddenly break. This means that we cannot guarantee an error-free experience on a system with outdated dependencies.

When your system is (soon to be) no longer supported, we strongly recommend upgrading. In the long run, it takes much more effort to keep an old system running than it is to upgrade.

To assist with reinstalls, brewblox-ctl can save and load snapshots of your installation. This lets you easily move your Brewblox installation between hosts or operating systems.

Deprecation schedule

We track two deprecation schedules: Debian (the base of the Raspberry Pi OS), and Python. Linux distros come with a built-in version of Python. For some systems, it's doable to upgrade Python versions. For the Raspberry Pi, it's significantly easier and faster to reinstall the OS.

Raspberry Pi OS

The Raspberry Pi OS is based on Debian, and we support the releases based on the stable Debian version. Debian versions become stable a year after release. This means their EOL date is one year after the release of the next version.

For an overview of Debian EOL dates, see


For Python, we support all active Python3 versions. Python versions are active for five years after release.

New versions may have some compatibility problems immediately after release.

For an overview Of Python EOL dates, see

For reference, these are the default Python versions for various distros:

  • Debian Stretch: Python 3.5
  • Debian Buster: Python 3.7
  • Debian Bullseye: Python 3.9
  • Debian Bookworm: Python 3.11
  • Ubuntu 18.04: Python 3.6
  • Ubuntu 20.04: Python 3.8
  • Ubuntu 22.04: Python 3.10

If you are using Synology, MacOS, or one of the many other flavours of Linux, then the Python version is the most important factor for compatibility.

The Python EOL date commonly falls before the Debian EOL date. In this case, support is on a best-effort base.

Upgrading Brewblox

You can seamlessly move your Brewblox installation from one OS to another. This is done by making a snapshot of your installation directory, and loading it on your new system.

Creating a Snapshot

To make a snapshot, navigate to your Brewblox directory, and run:

brewblox-ctl snapshot save

This will create the brewblox.tar.gz archive in the parent directory of the Brewblox directory. By default, this will be ~/brewblox.tar.gz.

Exporting the snapshot

To move files between your Pi and your home computer, we recommend FileZilla.

The host field should be sftp://IP_ADDRESS. Username / password are the same as when logging in over SSH.


Using a snapshot during installation

Follow the Startup Guide to install Brewblox. Then use FileZilla to copy your brewblox.tar.gz snapshot to the /home/pi directory on your Pi.

When this is done, navigate to your Brewblox directory, and run:

brewblox-ctl snapshot load
brewblox-ctl update

Your system is now configured exactly as it was at the time of the snapshot.