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The hassos-expand script calls sfdisk to find free disk space. It seems that today it considers the space before the first partition as free: $ sudo sfdisk -Fq /dev/sdi Start End Sectors Size 2048 16383 14336 7M This causes the script to always resize. It seems not to cause harm to the partition table (it does not resize really). However, the call to partx seems to confuse systemd and kill the mnt-data.mount process (presumably because udev causes remove/add events for the by-label device units). Consider everything below 8MiB to not be worthy of a size change. This avoids missdetection and resize attempts where there is no need.
Home Assistant Operating System
Home Assistant Operating System (formerly HassOS) is an operating system optimized for hosting Home Assistant and its Add-ons.
Home Assistant Operating System uses Docker as Container engine. It by default deploys the Home Assistant Supervisor as a container. Home Assistant Supervisor in turn uses the Docker container engine to control Home Assistant Core and Add-Ons in separate containers. Home Assistant Operating System is not based on a regular Linux distribution like Ubuntu. It is built using buildroot and it is optimized for running Home Assistant, especially on single board compute (SBC) devices like the Pi, ODROID, NUC and Tinker Board (see supported hardware below).
Features
- Lightweight and memory-efficient
- Minimized I/O
- Over The Air (OTA) updates
- Offline updates
- Modular using Docker
Supported hardware
- Raspberry Pi
- Hardkernel ODROID
- Intel NUC
- Asus Tinker Board
- Virtual appliances
See full list and specific models here
Getting Started
If you just want to use Home Assistant the official getting started guide and installation instructions take you through how to download Home Assistant Operating System and get it running on your machine.
If you're interested in finding out more about Home Assistant Operating System and how it works read on...
HassOS components
- Bootloader:
- Operating System:
- Buildroot LTS Linux
- File Systems:
- Container Platform:
- Docker Engine for running Home Assistant components in containers
- Updates:
- RAUC for Over The Air (OTA) and USB updates
- Security:
- AppArmor Linux kernel security module
If you don't have experience with these, embedded systems, buildroot or the build process for Linux distributions, then please read up on these topics. The rest of the documentation in this project is for developers and assumes you have experience of embedded systems or a strong understanding of the internal workings of operating systems.
Developer Documentation
All developer documentation is in the Documentation directory.