developers.home-assistant/docs/supervisor.md

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Home Assistant Supervisor	Introduction

The Supervisor allows the user to manage their Home Assistant installation from Home Assistant. The Supervisor has the following responsibilities:

• Run Home Assistant Core
• Update Home Assistant Core. Automatically roll back if the update fails.
• Make and restore backups
• Add-ons
• Unified audio system
• Update the Home Assistant operating system (disabled in a Supervised installation)

Architecture

• Home Assistant Core: home automation platform
• Add-ons: extra applications that the user wants to run on their server
• DNS: allows core and add-ons to communicate among one another
• Audio: allows core and add-ons to play audio
• mDNS: help discover and connect to devices and services in the network
• Supervisor: manages all parts of the system and keeps it up to date
• Docker: container service to run applications.
• Operating System: Linux based operating system
• D-Bus: communication system to control parts of the operating system like the network manager