140 lines
4.1 KiB
Nix
140 lines
4.1 KiB
Nix
{
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lib,
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config,
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pkgs,
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...
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}:
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let
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templateSubmodule =
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{ ... }:
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{
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options = {
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enable = lib.mkEnableOption "this template";
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target = lib.mkOption {
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description = "Path in the container";
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type = lib.types.path;
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};
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template = lib.mkOption {
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description = ".tpl file for rendering the target";
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type = lib.types.path;
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};
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when = lib.mkOption {
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description = "Events which trigger a rewrite (create, copy)";
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type = lib.types.listOf (lib.types.str);
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};
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properties = lib.mkOption {
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description = "Additional properties";
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type = lib.types.attrs;
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default = { };
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};
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};
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};
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toYAML = name: data: pkgs.writeText name (lib.generators.toYAML { } data);
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cfg = config.virtualisation.lxc;
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templates =
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if cfg.templates != { } then
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let
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list = lib.mapAttrsToList (name: value: { inherit name; } // value) (
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lib.filterAttrs (name: value: value.enable) cfg.templates
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);
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in
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{
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files = map (tpl: {
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source = tpl.template;
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target = "/templates/${tpl.name}.tpl";
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}) list;
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properties = lib.listToAttrs (
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map (
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tpl:
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lib.nameValuePair tpl.target {
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when = tpl.when;
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template = "${tpl.name}.tpl";
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properties = tpl.properties;
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}
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) list
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);
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}
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else
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{
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files = [ ];
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properties = { };
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};
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in
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{
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imports = [
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../image/file-options.nix
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];
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meta = {
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maintainers = lib.teams.lxc.members;
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};
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options = {
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virtualisation.lxc = {
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templates = lib.mkOption {
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description = "Templates for LXD";
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type = lib.types.attrsOf (lib.types.submodule templateSubmodule);
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default = { };
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example = lib.literalExpression ''
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{
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# create /etc/hostname on container creation
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"hostname" = {
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enable = true;
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target = "/etc/hostname";
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template = builtins.writeFile "hostname.tpl" "{{ container.name }}";
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when = [ "create" ];
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};
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# create /etc/nixos/hostname.nix with a configuration for keeping the hostname applied
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"hostname-nix" = {
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enable = true;
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target = "/etc/nixos/hostname.nix";
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template = builtins.writeFile "hostname-nix.tpl" "{ ... }: { networking.hostName = "{{ container.name }}"; }";
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# copy keeps the file updated when the container is changed
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when = [ "create" "copy" ];
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};
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# copy allow the user to specify a custom configuration.nix
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"configuration-nix" = {
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enable = true;
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target = "/etc/nixos/configuration.nix";
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template = builtins.writeFile "configuration-nix" "{{ config_get(\"user.user-data\", properties.default) }}";
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when = [ "create" ];
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};
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};
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'';
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};
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};
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};
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config = {
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system.nixos.tags = [
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"lxc"
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"metadata"
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];
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image.extension = "tar.xz";
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image.filePath = "tarball/${config.image.fileName}";
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system.build.image = config.system.build.metadata;
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system.build.metadata = pkgs.callPackage ../../lib/make-system-tarball.nix {
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fileName = config.image.baseName;
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contents = [
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{
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source = toYAML "metadata.yaml" {
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architecture = builtins.elemAt (builtins.match "^([a-z0-9_]+).+" (toString pkgs.stdenv.hostPlatform.system)) 0;
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creation_date = 1;
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properties = {
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description = "${config.system.nixos.distroName} ${config.system.nixos.codeName} ${config.system.nixos.label} ${pkgs.stdenv.hostPlatform.system}";
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os = "${config.system.nixos.distroId}";
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release = "${config.system.nixos.codeName}";
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};
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templates = templates.properties;
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};
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target = "/metadata.yaml";
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}
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] ++ templates.files;
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};
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};
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}
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