d918dace95
Remove net.ipv6.conf.all.forwarding=1 from 60-otbr-ip-forward.conf
and rely on Docker to enable IPv6 forwarding instead, just as we
already rely on it for IPv4 forwarding (needed for NAT64 in OTBR).
When this sysctl was added (d9ec60316), Docker did not enable IPv6 by
default. Since Docker 27 (April 2024), IPv6 support — including
ip6tables — is enabled by default, and Docker enables IPv6 forwarding
at startup just like it does for IPv4.
Importantly, when Docker enables forwarding itself (rather than finding
it already on), it also sets the FORWARD chain policy to DROP as a
safety measure, Pre-enabling the sysctl prevents this, leaving the IPv6
FORWARD chain at ACCEPT. By removing our sysctl, we get the same
protective DROP policy for IPv6 that we already benefit from for IPv4.
Home Assistant Operating System
Home Assistant Operating System (formerly HassOS) is a Linux based operating system optimized to host Home Assistant and its Apps.
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 Apps 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
The list of supported hardware is defined by ADR-0015. Every new hardware addition must meet at least requirements defined in ADR-0017 and pass through an architecture design proposal.
For documentation explaining details of the individual supported boards, see Board support section of the Home Assistant Developer Docs.
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.