mirror of
https://github.com/NixOS/nixpkgs.git
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918100f48f
Database provisioning was shown to be racy since adding a recorder test using PostgreSQL. There is no harm in waiting for these services, because if they're not available they will be ignored.
547 lines
19 KiB
Nix
547 lines
19 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.home-assistant;
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format = pkgs.formats.yaml {};
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# Render config attribute sets to YAML
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# Values that are null will be filtered from the output, so this is one way to have optional
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# options shown in settings.
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# We post-process the result to add support for YAML functions, like secrets or includes, see e.g.
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# https://www.home-assistant.io/docs/configuration/secrets/
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filteredConfig = lib.converge (lib.filterAttrsRecursive (_: v: ! elem v [ null ])) cfg.config or {};
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configFile = pkgs.runCommand "configuration.yaml" { preferLocalBuild = true; } ''
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cp ${format.generate "configuration.yaml" filteredConfig} $out
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sed -i -e "s/'\!\([a-z_]\+\) \(.*\)'/\!\1 \2/;s/^\!\!/\!/;" $out
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'';
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lovelaceConfig = cfg.lovelaceConfig or {};
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lovelaceConfigFile = format.generate "ui-lovelace.yaml" lovelaceConfig;
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# Components advertised by the home-assistant package
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availableComponents = cfg.package.availableComponents;
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# Components that were added by overriding the package
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explicitComponents = cfg.package.extraComponents;
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useExplicitComponent = component: elem component explicitComponents;
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# Given a component "platform", looks up whether it is used in the config
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# as `platform = "platform";`.
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#
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# For example, the component mqtt.sensor is used as follows:
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# config.sensor = [ {
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# platform = "mqtt";
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# ...
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# } ];
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usedPlatforms = config:
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if isAttrs config then
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optional (config ? platform) config.platform
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++ concatMap usedPlatforms (attrValues config)
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else if isList config then
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concatMap usedPlatforms config
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else [ ];
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useComponentPlatform = component: elem component (usedPlatforms cfg.config);
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# Returns whether component is used in config, explicitly passed into package or
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# configured in the module.
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useComponent = component:
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hasAttrByPath (splitString "." component) cfg.config
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|| useComponentPlatform component
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|| useExplicitComponent component
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|| builtins.elem component cfg.extraComponents;
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# Final list of components passed into the package to include required dependencies
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extraComponents = filter useComponent availableComponents;
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package = (cfg.package.override (oldArgs: {
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# Respect overrides that already exist in the passed package and
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# concat it with values passed via the module.
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extraComponents = oldArgs.extraComponents ++ extraComponents;
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extraPackages = ps: (oldArgs.extraPackages ps) ++ (cfg.extraPackages ps);
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}));
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in {
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imports = [
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# Migrations in NixOS 22.05
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(mkRemovedOptionModule [ "services" "home-assistant" "applyDefaultConfig" ] "The default config was migrated into services.home-assistant.config")
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(mkRemovedOptionModule [ "services" "home-assistant" "autoExtraComponents" ] "Components are now parsed from services.home-assistant.config unconditionally")
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(mkRenamedOptionModule [ "services" "home-assistant" "port" ] [ "services" "home-assistant" "config" "http" "server_port" ])
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];
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meta = {
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buildDocsInSandbox = false;
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maintainers = teams.home-assistant.members;
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};
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options.services.home-assistant = {
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# Running home-assistant on NixOS is considered an installation method that is unsupported by the upstream project.
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# https://github.com/home-assistant/architecture/blob/master/adr/0012-define-supported-installation-method.md#decision
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enable = mkEnableOption "Home Assistant. Please note that this installation method is unsupported upstream";
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configDir = mkOption {
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default = "/var/lib/hass";
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type = types.path;
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description = "The config directory, where your <filename>configuration.yaml</filename> is located.";
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};
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extraComponents = mkOption {
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type = types.listOf (types.enum availableComponents);
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default = [
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# List of components required to complete the onboarding
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"default_config"
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"met"
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"esphome"
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];
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example = literalExpression ''
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[
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"analytics"
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"default_config"
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"esphome"
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"my"
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"shopping_list"
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"wled"
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]
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'';
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description = ''
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List of <link xlink:href="https://www.home-assistant.io/integrations/">components</link> that have their dependencies included in the package.
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The component name can be found in the URL, for example <literal>https://www.home-assistant.io/integrations/ffmpeg/</literal> would map to <literal>ffmpeg</literal>.
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'';
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};
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extraPackages = mkOption {
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type = types.functionTo (types.listOf types.package);
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default = _: [];
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defaultText = literalExpression ''
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python3Packages: with python3Packages; [];
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'';
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example = literalExpression ''
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python3Packages: with python3Packages; [
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# postgresql support
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psycopg2
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];
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'';
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description = ''
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List of packages to add to propagatedBuildInputs.
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A popular example is <package>python3Packages.psycopg2</package>
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for PostgreSQL support in the recorder component.
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'';
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};
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config = mkOption {
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type = types.submodule {
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freeformType = format.type;
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options = {
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# This is a partial selection of the most common options, so new users can quickly
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# pick up how to match home-assistants config structure to ours. It also lets us preset
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# config values intelligently.
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homeassistant = {
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# https://www.home-assistant.io/docs/configuration/basic/
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name = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "Home";
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description = ''
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Name of the location where Home Assistant is running.
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'';
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};
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latitude = mkOption {
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type = types.nullOr (types.either types.float types.str);
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default = null;
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example = 52.3;
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description = ''
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Latitude of your location required to calculate the time the sun rises and sets.
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'';
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};
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longitude = mkOption {
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type = types.nullOr (types.either types.float types.str);
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default = null;
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example = 4.9;
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description = ''
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Longitude of your location required to calculate the time the sun rises and sets.
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'';
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};
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unit_system = mkOption {
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type = types.nullOr (types.enum [ "metric" "imperial" ]);
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default = null;
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example = "metric";
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description = ''
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The unit system to use. This also sets temperature_unit, Celsius for Metric and Fahrenheit for Imperial.
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'';
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};
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temperature_unit = mkOption {
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type = types.nullOr (types.enum [ "C" "F" ]);
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default = null;
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example = "C";
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description = ''
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Override temperature unit set by unit_system. <literal>C</literal> for Celsius, <literal>F</literal> for Fahrenheit.
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'';
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};
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time_zone = mkOption {
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type = types.nullOr types.str;
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default = config.time.timeZone or null;
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defaultText = literalExpression ''
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config.time.timeZone or null
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'';
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example = "Europe/Amsterdam";
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description = ''
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Pick your time zone from the column TZ of Wikipedia’s <link xlink:href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones">list of tz database time zones</link>.
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'';
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};
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};
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http = {
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# https://www.home-assistant.io/integrations/http/
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server_host = mkOption {
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type = types.either types.str (types.listOf types.str);
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default = [
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"0.0.0.0"
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"::"
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];
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example = "::1";
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description = ''
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Only listen to incoming requests on specific IP/host. The default listed assumes support for IPv4 and IPv6.
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'';
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};
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server_port = mkOption {
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default = 8123;
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type = types.port;
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description = ''
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The port on which to listen.
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'';
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};
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};
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lovelace = {
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# https://www.home-assistant.io/lovelace/dashboards/
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mode = mkOption {
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type = types.enum [ "yaml" "storage" ];
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default = if cfg.lovelaceConfig != null
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then "yaml"
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else "storage";
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defaultText = literalExpression ''
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if cfg.lovelaceConfig != null
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then "yaml"
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else "storage";
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'';
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example = "yaml";
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description = ''
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In what mode should the main Lovelace panel be, <literal>yaml</literal> or <literal>storage</literal> (UI managed).
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'';
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};
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};
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};
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};
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example = literalExpression ''
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{
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homeassistant = {
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name = "Home";
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latitude = "!secret latitude";
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longitude = "!secret longitude";
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elevation = "!secret elevation";
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unit_system = "metric";
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time_zone = "UTC";
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};
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frontend = {
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themes = "!include_dir_merge_named themes";
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};
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http = {};
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feedreader.urls = [ "https://nixos.org/blogs.xml" ];
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}
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'';
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description = ''
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Your <filename>configuration.yaml</filename> as a Nix attribute set.
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YAML functions like <link xlink:href="https://www.home-assistant.io/docs/configuration/secrets/">secrets</link>
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can be passed as a string and will be unquoted automatically.
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Unless this option is explicitly set to <literal>null</literal>
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we assume your <filename>configuration.yaml</filename> is
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managed through this module and thereby overwritten on startup.
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'';
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};
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configWritable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to make <filename>configuration.yaml</filename> writable.
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This will allow you to edit it from Home Assistant's web interface.
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This only has an effect if <option>config</option> is set.
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However, bear in mind that it will be overwritten at every start of the service.
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'';
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};
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lovelaceConfig = mkOption {
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default = null;
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type = types.nullOr format.type;
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# from https://www.home-assistant.io/lovelace/dashboards/
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example = literalExpression ''
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{
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title = "My Awesome Home";
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views = [ {
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title = "Example";
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cards = [ {
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type = "markdown";
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title = "Lovelace";
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content = "Welcome to your **Lovelace UI**.";
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} ];
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} ];
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}
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'';
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description = ''
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Your <filename>ui-lovelace.yaml</filename> as a Nix attribute set.
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Setting this option will automatically set <literal>lovelace.mode</literal> to <literal>yaml</literal>.
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Beware that setting this option will delete your previous <filename>ui-lovelace.yaml</filename>
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'';
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};
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lovelaceConfigWritable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to make <filename>ui-lovelace.yaml</filename> writable.
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This will allow you to edit it from Home Assistant's web interface.
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This only has an effect if <option>lovelaceConfig</option> is set.
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However, bear in mind that it will be overwritten at every start of the service.
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'';
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};
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package = mkOption {
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default = pkgs.home-assistant.overrideAttrs (oldAttrs: {
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doInstallCheck = false;
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});
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defaultText = literalExpression ''
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pkgs.home-assistant.overrideAttrs (oldAttrs: {
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doInstallCheck = false;
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})
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'';
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type = types.package;
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example = literalExpression ''
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pkgs.home-assistant.override {
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extraPackages = python3Packages: with python3Packages; [
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psycopg2
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];
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extraComponents = [
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"default_config"
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"esphome"
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"met"
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];
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}
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'';
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description = ''
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The Home Assistant package to use.
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Override <literal>extraPackages</literal> or <literal>extraComponents</literal> in order to add additional dependencies.
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If you specify <option>config</option> and do not set <option>autoExtraComponents</option>
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to <literal>false</literal>, overriding <literal>extraComponents</literal> will have no effect.
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Avoid <literal>home-assistant.overridePythonAttrs</literal> if you use <literal>autoExtraComponents</literal>.
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'';
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};
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openFirewall = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to open the firewall for the specified port.";
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};
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};
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config = mkIf cfg.enable {
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networking.firewall.allowedTCPPorts = mkIf cfg.openFirewall [ cfg.port ];
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systemd.services.home-assistant = {
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description = "Home Assistant";
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after = [
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"network-online.target"
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# prevent races with database creation
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"mysql.service"
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"postgresql.service"
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];
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preStart = optionalString (cfg.config != null) (if cfg.configWritable then ''
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cp --no-preserve=mode ${configFile} "${cfg.configDir}/configuration.yaml"
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'' else ''
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rm -f "${cfg.configDir}/configuration.yaml"
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ln -s ${configFile} "${cfg.configDir}/configuration.yaml"
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'') + optionalString (cfg.lovelaceConfig != null) (if cfg.lovelaceConfigWritable then ''
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cp --no-preserve=mode ${lovelaceConfigFile} "${cfg.configDir}/ui-lovelace.yaml"
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'' else ''
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rm -f "${cfg.configDir}/ui-lovelace.yaml"
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ln -s ${lovelaceConfigFile} "${cfg.configDir}/ui-lovelace.yaml"
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'');
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serviceConfig = let
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# List of capabilities to equip home-assistant with, depending on configured components
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capabilities = [
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# Empty string first, so we will never accidentally have an empty capability bounding set
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# https://github.com/NixOS/nixpkgs/issues/120617#issuecomment-830685115
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""
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] ++ (unique (optionals (useComponent "bluetooth_tracker" || useComponent "bluetooth_le_tracker") [
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# Required for interaction with hci devices and bluetooth sockets
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# https://www.home-assistant.io/integrations/bluetooth_le_tracker/#rootless-setup-on-core-installs
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"CAP_NET_ADMIN"
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"CAP_NET_RAW"
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] ++ lib.optionals (useComponent "emulated_hue") [
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# Alexa looks for the service on port 80
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# https://www.home-assistant.io/integrations/emulated_hue
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"CAP_NET_BIND_SERVICE"
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] ++ lib.optionals (useComponent "nmap_tracker") [
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# https://www.home-assistant.io/integrations/nmap_tracker#linux-capabilities
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"CAP_NET_ADMIN"
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"CAP_NET_BIND_SERVICE"
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"CAP_NET_RAW"
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]));
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componentsUsingBluetooth = [
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# Components that require the AF_BLUETOOTH address family
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"bluetooth_tracker"
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"bluetooth_le_tracker"
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];
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componentsUsingPing = [
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# Components that require the capset syscall for the ping wrapper
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"ping"
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"wake_on_lan"
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];
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componentsUsingSerialDevices = [
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# Components that require access to serial devices (/dev/tty*)
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# List generated from home-assistant documentation:
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# git clone https://github.com/home-assistant/home-assistant.io/
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# cd source/_integrations
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# rg "/dev/tty" -l | cut -d'/' -f3 | cut -d'.' -f1 | sort
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# And then extended by references found in the source code, these
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# mostly the ones using config flows already.
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"acer_projector"
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"alarmdecoder"
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"arduino"
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"blackbird"
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"deconz"
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"dsmr"
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"edl21"
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"elkm1"
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"elv"
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"enocean"
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"firmata"
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"flexit"
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"gpsd"
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"insteon"
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"kwb"
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"lacrosse"
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"mhz19"
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"modbus"
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"modem_callerid"
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"mysensors"
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"nad"
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"numato"
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"rflink"
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"rfxtrx"
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"scsgate"
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"serial"
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"serial_pm"
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"sms"
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"upb"
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"usb"
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"velbus"
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"w800rf32"
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"xbee"
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"zha"
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"zwave"
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"zwave_js"
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];
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in {
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ExecStart = "${package}/bin/hass --config '${cfg.configDir}'";
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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User = "hass";
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Group = "hass";
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Restart = "on-failure";
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RestartForceExitStatus = "100";
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SuccessExitStatus = "100";
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KillSignal = "SIGINT";
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# Hardening
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AmbientCapabilities = capabilities;
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CapabilityBoundingSet = capabilities;
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DeviceAllow = (optionals (any useComponent componentsUsingSerialDevices) [
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"char-ttyACM rw"
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"char-ttyAMA rw"
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"char-ttyUSB rw"
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]);
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DevicePolicy = "closed";
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LockPersonality = true;
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MemoryDenyWriteExecute = true;
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NoNewPrivileges = true;
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PrivateTmp = true;
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PrivateUsers = false; # prevents gaining capabilities in the host namespace
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ProtectClock = true;
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ProtectControlGroups = true;
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ProtectHome = true;
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ProtectHostname = true;
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ProtectKernelLogs = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectProc = "invisible";
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ProcSubset = "all";
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ProtectSystem = "strict";
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RemoveIPC = true;
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ReadWritePaths = let
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# Allow rw access to explicitly configured paths
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cfgPath = [ "config" "homeassistant" "allowlist_external_dirs" ];
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value = attrByPath cfgPath [] cfg;
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allowPaths = if isList value then value else singleton value;
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in [ "${cfg.configDir}" ] ++ allowPaths;
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RestrictAddressFamilies = [
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"AF_INET"
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"AF_INET6"
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"AF_NETLINK"
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"AF_UNIX"
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] ++ optionals (any useComponent componentsUsingBluetooth) [
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"AF_BLUETOOTH"
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];
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RestrictNamespaces = true;
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RestrictRealtime = true;
|
||
RestrictSUIDSGID = true;
|
||
SupplementaryGroups = optionals (any useComponent componentsUsingSerialDevices) [
|
||
"dialout"
|
||
];
|
||
SystemCallArchitectures = "native";
|
||
SystemCallFilter = [
|
||
"@system-service"
|
||
"~@privileged"
|
||
] ++ optionals (any useComponent componentsUsingPing) [
|
||
"capset"
|
||
];
|
||
UMask = "0077";
|
||
};
|
||
path = [
|
||
"/run/wrappers" # needed for ping
|
||
];
|
||
};
|
||
|
||
systemd.targets.home-assistant = rec {
|
||
description = "Home Assistant";
|
||
wantedBy = [ "multi-user.target" ];
|
||
wants = [ "home-assistant.service" ];
|
||
after = wants;
|
||
};
|
||
|
||
users.users.hass = {
|
||
home = cfg.configDir;
|
||
createHome = true;
|
||
group = "hass";
|
||
uid = config.ids.uids.hass;
|
||
};
|
||
|
||
users.groups.hass.gid = config.ids.gids.hass;
|
||
};
|
||
}
|