590 lines
21 KiB
Nix
590 lines
21 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}: let
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cfg = config.services.headscale;
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dataDir = "/var/lib/headscale";
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runDir = "/run/headscale";
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cliConfig = {
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# Turn off update checks since the origin of our package
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# is nixpkgs and not Github.
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disable_check_updates = true;
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unix_socket = "${runDir}/headscale.sock";
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};
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settingsFormat = pkgs.formats.yaml {};
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configFile = settingsFormat.generate "headscale.yaml" cfg.settings;
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cliConfigFile = settingsFormat.generate "headscale.yaml" cliConfig;
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in {
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options = {
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services.headscale = {
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enable = lib.mkEnableOption "headscale, Open Source coordination server for Tailscale";
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package = lib.mkPackageOption pkgs "headscale" {};
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user = lib.mkOption {
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default = "headscale";
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type = lib.types.str;
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description = ''
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User account under which headscale runs.
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::: {.note}
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If left as the default value this user will automatically be created
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on system activation, otherwise you are responsible for
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ensuring the user exists before the headscale service starts.
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:::
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'';
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};
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group = lib.mkOption {
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default = "headscale";
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type = lib.types.str;
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description = ''
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Group under which headscale runs.
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::: {.note}
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If left as the default value this group will automatically be created
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on system activation, otherwise you are responsible for
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ensuring the user exists before the headscale service starts.
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:::
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'';
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};
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address = lib.mkOption {
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type = lib.types.str;
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default = "127.0.0.1";
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description = ''
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Listening address of headscale.
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'';
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example = "0.0.0.0";
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};
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port = lib.mkOption {
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type = lib.types.port;
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default = 8080;
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description = ''
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Listening port of headscale.
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'';
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example = 443;
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};
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settings = lib.mkOption {
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description = ''
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Overrides to {file}`config.yaml` as a Nix attribute set.
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Check the [example config](https://github.com/juanfont/headscale/blob/main/config-example.yaml)
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for possible options.
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'';
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type = lib.types.submodule {
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freeformType = settingsFormat.type;
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imports = with lib; [
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(mkAliasOptionModule ["acl_policy_path"] ["policy" "path"])
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(mkAliasOptionModule ["db_host"] ["database" "postgres" "host"])
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(mkAliasOptionModule ["db_name"] ["database" "postgres" "name"])
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(mkAliasOptionModule ["db_password_file"] ["database" "postgres" "password_file"])
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(mkAliasOptionModule ["db_path"] ["database" "sqlite" "path"])
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(mkAliasOptionModule ["db_port"] ["database" "postgres" "port"])
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(mkAliasOptionModule ["db_type"] ["database" "type"])
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(mkAliasOptionModule ["db_user"] ["database" "postgres" "user"])
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(mkAliasOptionModule ["dns_config" "base_domain"] ["dns" "base_domain"])
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(mkAliasOptionModule ["dns_config" "domains"] ["dns" "search_domains"])
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(mkAliasOptionModule ["dns_config" "magic_dns"] ["dns" "magic_dns"])
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(mkAliasOptionModule ["dns_config" "nameservers"] ["dns" "nameservers" "global"])
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];
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options = {
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server_url = lib.mkOption {
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type = lib.types.str;
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default = "http://127.0.0.1:8080";
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description = ''
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The url clients will connect to.
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'';
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example = "https://myheadscale.example.com:443";
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};
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noise.private_key_path = lib.mkOption {
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type = lib.types.path;
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default = "${dataDir}/noise_private.key";
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description = ''
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Path to noise private key file, generated automatically if it does not exist.
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'';
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};
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prefixes = let
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prefDesc = ''
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Each prefix consists of either an IPv4 or IPv6 address,
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and the associated prefix length, delimited by a slash.
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It must be within IP ranges supported by the Tailscale
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client - i.e., subnets of 100.64.0.0/10 and fd7a:115c:a1e0::/48.
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'';
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in {
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v4 = lib.mkOption {
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type = lib.types.str;
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default = "100.64.0.0/10";
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description = prefDesc;
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};
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v6 = lib.mkOption {
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type = lib.types.str;
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default = "fd7a:115c:a1e0::/48";
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description = prefDesc;
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};
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allocation = lib.mkOption {
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type = lib.types.enum ["sequential" "random"];
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example = "random";
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default = "sequential";
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description = ''
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Strategy used for allocation of IPs to nodes, available options:
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- sequential (default): assigns the next free IP from the previous given IP.
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- random: assigns the next free IP from a pseudo-random IP generator (crypto/rand).
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'';
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};
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};
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derp = {
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urls = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = ["https://controlplane.tailscale.com/derpmap/default"];
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description = ''
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List of urls containing DERP maps.
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See [How Tailscale works](https://tailscale.com/blog/how-tailscale-works/) for more information on DERP maps.
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'';
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};
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paths = lib.mkOption {
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type = lib.types.listOf lib.types.path;
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default = [];
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description = ''
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List of file paths containing DERP maps.
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See [How Tailscale works](https://tailscale.com/blog/how-tailscale-works/) for more information on DERP maps.
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'';
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};
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auto_update_enable = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to automatically update DERP maps on a set frequency.
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'';
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example = false;
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};
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update_frequency = lib.mkOption {
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type = lib.types.str;
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default = "24h";
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description = ''
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Frequency to update DERP maps.
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'';
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example = "5m";
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};
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server.private_key_path = lib.mkOption {
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type = lib.types.path;
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default = "${dataDir}/derp_server_private.key";
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description = ''
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Path to derp private key file, generated automatically if it does not exist.
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'';
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};
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};
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ephemeral_node_inactivity_timeout = lib.mkOption {
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type = lib.types.str;
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default = "30m";
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description = ''
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Time before an inactive ephemeral node is deleted.
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'';
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example = "5m";
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};
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database = {
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type = lib.mkOption {
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type = lib.types.enum ["sqlite" "sqlite3" "postgres"];
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example = "postgres";
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default = "sqlite";
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description = ''
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Database engine to use.
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Please note that using Postgres is highly discouraged as it is only supported for legacy reasons.
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All new development, testing and optimisations are done with SQLite in mind.
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'';
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};
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sqlite = {
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path = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = "${dataDir}/db.sqlite";
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description = "Path to the sqlite3 database file.";
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};
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write_ahead_log = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Enable WAL mode for SQLite. This is recommended for production environments.
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https://www.sqlite.org/wal.html
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'';
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example = true;
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};
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};
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postgres = {
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host = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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example = "127.0.0.1";
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description = "Database host address.";
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};
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port = lib.mkOption {
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type = lib.types.nullOr lib.types.port;
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default = null;
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example = 3306;
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description = "Database host port.";
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};
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name = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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example = "headscale";
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description = "Database name.";
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};
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user = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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example = "headscale";
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description = "Database user.";
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};
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password_file = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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example = "/run/keys/headscale-dbpassword";
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description = ''
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A file containing the password corresponding to
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{option}`database.user`.
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'';
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};
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};
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};
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log = {
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level = lib.mkOption {
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type = lib.types.str;
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default = "info";
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description = ''
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headscale log level.
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'';
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example = "debug";
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};
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format = lib.mkOption {
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type = lib.types.str;
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default = "text";
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description = ''
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headscale log format.
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'';
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example = "json";
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};
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};
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dns = {
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magic_dns = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to use [MagicDNS](https://tailscale.com/kb/1081/magicdns/).
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Only works if there is at least a nameserver defined.
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'';
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example = false;
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};
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base_domain = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = ''
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Defines the base domain to create the hostnames for MagicDNS.
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{option}`baseDomain` must be a FQDNs, without the trailing dot.
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The FQDN of the hosts will be
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`hostname.namespace.base_domain` (e.g.
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`myhost.mynamespace.example.com`).
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'';
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};
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nameservers = {
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global = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [];
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description = ''
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List of nameservers to pass to Tailscale clients.
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'';
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};
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};
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search_domains = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [];
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description = ''
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Search domains to inject to Tailscale clients.
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'';
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example = ["mydomain.internal"];
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};
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};
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oidc = {
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issuer = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = ''
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URL to OpenID issuer.
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'';
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example = "https://openid.example.com";
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};
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client_id = lib.mkOption {
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type = lib.types.str;
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default = "";
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description = ''
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OpenID Connect client ID.
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'';
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};
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client_secret_path = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = null;
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description = ''
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Path to OpenID Connect client secret file. Expands environment variables in format ''${VAR}.
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'';
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};
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scope = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = ["openid" "profile" "email"];
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description = ''
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Scopes used in the OIDC flow.
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'';
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};
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extra_params = lib.mkOption {
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type = lib.types.attrsOf lib.types.str;
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default = {};
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description = ''
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Custom query parameters to send with the Authorize Endpoint request.
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'';
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example = {
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domain_hint = "example.com";
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};
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};
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allowed_domains = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [];
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description = ''
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Allowed principal domains. if an authenticated user's domain
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is not in this list authentication request will be rejected.
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'';
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example = ["example.com"];
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};
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allowed_users = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [];
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description = ''
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Users allowed to authenticate even if not in allowedDomains.
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'';
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example = ["alice@example.com"];
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};
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strip_email_domain = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether the domain part of the email address should be removed when generating namespaces.
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'';
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};
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};
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tls_letsencrypt_hostname = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = "";
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description = ''
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Domain name to request a TLS certificate for.
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'';
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};
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tls_letsencrypt_challenge_type = lib.mkOption {
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type = lib.types.enum ["TLS-ALPN-01" "HTTP-01"];
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default = "HTTP-01";
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description = ''
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Type of ACME challenge to use, currently supported types:
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`HTTP-01` or `TLS-ALPN-01`.
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'';
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};
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tls_letsencrypt_listen = lib.mkOption {
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type = lib.types.nullOr lib.types.str;
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default = ":http";
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description = ''
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When HTTP-01 challenge is chosen, letsencrypt must set up a
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verification endpoint, and it will be listening on:
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`:http = port 80`.
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'';
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};
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tls_cert_path = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = ''
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Path to already created certificate.
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'';
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};
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tls_key_path = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = ''
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Path to key for already created certificate.
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'';
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};
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policy = {
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mode = lib.mkOption {
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type = lib.types.enum ["file" "database"];
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default = "file";
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description = ''
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The mode can be "file" or "database" that defines
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where the ACL policies are stored and read from.
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'';
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};
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path = lib.mkOption {
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type = lib.types.nullOr lib.types.path;
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default = null;
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description = ''
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If the mode is set to "file", the path to a
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HuJSON file containing ACL policies.
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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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};
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};
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imports = with lib; [
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(mkRenamedOptionModule ["services" "headscale" "derp" "autoUpdate"] ["services" "headscale" "settings" "derp" "auto_update_enable"])
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(mkRenamedOptionModule ["services" "headscale" "derp" "paths"] ["services" "headscale" "settings" "derp" "paths"])
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(mkRenamedOptionModule ["services" "headscale" "derp" "updateFrequency"] ["services" "headscale" "settings" "derp" "update_frequency"])
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(mkRenamedOptionModule ["services" "headscale" "derp" "urls"] ["services" "headscale" "settings" "derp" "urls"])
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(mkRenamedOptionModule ["services" "headscale" "ephemeralNodeInactivityTimeout"] ["services" "headscale" "settings" "ephemeral_node_inactivity_timeout"])
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(mkRenamedOptionModule ["services" "headscale" "logLevel"] ["services" "headscale" "settings" "log" "level"])
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(mkRenamedOptionModule ["services" "headscale" "openIdConnect" "clientId"] ["services" "headscale" "settings" "oidc" "client_id"])
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(mkRenamedOptionModule ["services" "headscale" "openIdConnect" "clientSecretFile"] ["services" "headscale" "settings" "oidc" "client_secret_path"])
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(mkRenamedOptionModule ["services" "headscale" "openIdConnect" "issuer"] ["services" "headscale" "settings" "oidc" "issuer"])
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(mkRenamedOptionModule ["services" "headscale" "serverUrl"] ["services" "headscale" "settings" "server_url"])
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(mkRenamedOptionModule ["services" "headscale" "tls" "certFile"] ["services" "headscale" "settings" "tls_cert_path"])
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(mkRenamedOptionModule ["services" "headscale" "tls" "keyFile"] ["services" "headscale" "settings" "tls_key_path"])
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(mkRenamedOptionModule ["services" "headscale" "tls" "letsencrypt" "challengeType"] ["services" "headscale" "settings" "tls_letsencrypt_challenge_type"])
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(mkRenamedOptionModule ["services" "headscale" "tls" "letsencrypt" "hostname"] ["services" "headscale" "settings" "tls_letsencrypt_hostname"])
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(mkRenamedOptionModule ["services" "headscale" "tls" "letsencrypt" "httpListen"] ["services" "headscale" "settings" "tls_letsencrypt_listen"])
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(mkRemovedOptionModule ["services" "headscale" "openIdConnect" "domainMap"] ''
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Headscale no longer uses domain_map. If you're using an old version of headscale you can still set this option via services.headscale.settings.oidc.domain_map.
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'')
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];
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config = lib.mkIf cfg.enable {
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services.headscale.settings = lib.mkMerge [
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cliConfig
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{
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listen_addr = lib.mkDefault "${cfg.address}:${toString cfg.port}";
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tls_letsencrypt_cache_dir = "${dataDir}/.cache";
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}
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];
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environment = {
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# Headscale CLI needs a minimal config to be able to locate the unix socket
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# to talk to the server instance.
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etc."headscale/config.yaml".source = cliConfigFile;
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systemPackages = [cfg.package];
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};
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users.groups.headscale = lib.mkIf (cfg.group == "headscale") {};
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users.users.headscale = lib.mkIf (cfg.user == "headscale") {
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description = "headscale user";
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home = dataDir;
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group = cfg.group;
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isSystemUser = true;
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};
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systemd.services.headscale = {
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description = "headscale coordination server for Tailscale";
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wants = ["network-online.target"];
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after = ["network-online.target"];
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wantedBy = ["multi-user.target"];
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script = ''
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${lib.optionalString (cfg.settings.database.postgres.password_file != null) ''
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export HEADSCALE_DATABASE_POSTGRES_PASS="$(head -n1 ${lib.escapeShellArg cfg.settings.database.postgres.password_file})"
|
|
''}
|
|
|
|
exec ${lib.getExe cfg.package} serve --config ${configFile}
|
|
'';
|
|
|
|
serviceConfig = let
|
|
capabilityBoundingSet = ["CAP_CHOWN"] ++ lib.optional (cfg.port < 1024) "CAP_NET_BIND_SERVICE";
|
|
in {
|
|
Restart = "always";
|
|
Type = "simple";
|
|
User = cfg.user;
|
|
Group = cfg.group;
|
|
|
|
# Hardening options
|
|
RuntimeDirectory = "headscale";
|
|
# Allow headscale group access so users can be added and use the CLI.
|
|
RuntimeDirectoryMode = "0750";
|
|
|
|
StateDirectory = "headscale";
|
|
StateDirectoryMode = "0750";
|
|
|
|
ProtectSystem = "strict";
|
|
ProtectHome = true;
|
|
PrivateTmp = true;
|
|
PrivateDevices = true;
|
|
ProtectKernelTunables = true;
|
|
ProtectControlGroups = true;
|
|
RestrictSUIDSGID = true;
|
|
PrivateMounts = true;
|
|
ProtectKernelModules = true;
|
|
ProtectKernelLogs = true;
|
|
ProtectHostname = true;
|
|
ProtectClock = true;
|
|
ProtectProc = "invisible";
|
|
ProcSubset = "pid";
|
|
RestrictNamespaces = true;
|
|
RemoveIPC = true;
|
|
UMask = "0077";
|
|
|
|
CapabilityBoundingSet = capabilityBoundingSet;
|
|
AmbientCapabilities = capabilityBoundingSet;
|
|
NoNewPrivileges = true;
|
|
LockPersonality = true;
|
|
RestrictRealtime = true;
|
|
SystemCallFilter = ["@system-service" "~@privileged" "@chown"];
|
|
SystemCallArchitectures = "native";
|
|
RestrictAddressFamilies = "AF_INET AF_INET6 AF_UNIX";
|
|
};
|
|
};
|
|
};
|
|
|
|
meta.maintainers = with lib.maintainers; [kradalby misterio77];
|
|
}
|