3a666bbeea
Instead of using per-file ZSTD compression, compress firmware (and newly also kernel modules) using LZMA within EROFS image. LZMA was picked because ZSTD support in EROFS is still experimental and due to some limitations in the implementation, the compression takes significantly more time. This change gives us more control over compression of the files and with the proposed settings, saves a bit of the space (~10 MiB) in the resulting image. In theory, even higher savings could be achieved through compressing other runtime binaries, but this would need to be thoroughly tested whether it doesn't have any detrimental effects. For firmware and modules, the overhead should be minimal, as they are usually touched only once per boot and are rather small before decompression. * buildroot 74994c4f32...92fab35fed (6): > fs/erofs: add custom compression option with optional compress-hints file > package/erofs-utils: bump to version 1.8.5 > package/erofs-utils: bump to version 1.8.3 > package/erofs-utils: bump to version 1.8.2 > package/erofs-utils: bump to version 1.8.1 > package/erofs-utils: add libdeflate and zlib optional dependencies
Home Assistant Operating System
Home Assistant Operating System (formerly HassOS) is a Linux based operating system optimized to host Home Assistant and its Add-ons.
Home Assistant Operating System uses Docker as its container engine. By default it 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 to run Home Assistant. It targets single board compute (SBC) devices like the Raspberry Pi or ODROID but also supports x86-64 systems with UEFI.
Features
- Lightweight and memory-efficient
- Minimized I/O
- Over The Air (OTA) updates
- Offline updates
- Modular using Docker container engine
Supported hardware
- Nabu Casa
- Raspberry Pi
- Hardkernel ODROID
- Asus Tinker Board
- Generic x86-64 (e.g. Intel NUC)
- Virtual appliances
See the 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...
Development
If you don't have experience with embedded systems, Buildroot or the build process for Linux distributions it is recommended to read up on these topics first (e.g. Bootlin has excellent resources).
The Home Assistant Operating System documentation can be found on the Home Assistant Developer Docs website.
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
Development builds
The Development build GitHub Action Workflow is a manually triggered workflow which creates Home Assistant OS development builds. The development builds are available at https://os-artifacts.home-assistant.io/index.html.