366 lines
14 KiB
Nix
366 lines
14 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.tahoe;
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in
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{
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options.services.tahoe = {
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introducers = mkOption {
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default = {};
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type = with types; attrsOf (submodule {
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options = {
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nickname = mkOption {
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type = types.str;
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description = ''
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The nickname of this Tahoe introducer.
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'';
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};
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tub.port = mkOption {
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default = 3458;
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type = types.int;
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description = ''
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The port on which the introducer will listen.
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'';
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};
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tub.location = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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The external location that the introducer should listen on.
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If specified, the port should be included.
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'';
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};
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package = mkOption {
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default = pkgs.tahoelafs;
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defaultText = literalExpression "pkgs.tahoelafs";
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type = types.package;
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description = ''
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The package to use for the Tahoe LAFS daemon.
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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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The Tahoe introducers.
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'';
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};
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nodes = mkOption {
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default = {};
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type = with types; attrsOf (submodule {
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options = {
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nickname = mkOption {
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type = types.str;
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description = ''
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The nickname of this Tahoe node.
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'';
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};
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tub.port = mkOption {
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default = 3457;
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type = types.int;
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description = ''
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The port on which the tub will listen.
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This is the correct setting to tweak if you want Tahoe's storage
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system to listen on a different port.
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'';
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};
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tub.location = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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The external location that the node should listen on.
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This is the setting to tweak if there are multiple interfaces
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and you want to alter which interface Tahoe is advertising.
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If specified, the port should be included.
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'';
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};
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web.port = mkOption {
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default = 3456;
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type = types.int;
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description = ''
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The port on which the Web server will listen.
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This is the correct setting to tweak if you want Tahoe's WUI to
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listen on a different port.
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'';
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};
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client.introducer = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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The furl for a Tahoe introducer node.
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Like all furls, keep this safe and don't share it.
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'';
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};
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client.helper = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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The furl for a Tahoe helper node.
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Like all furls, keep this safe and don't share it.
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'';
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};
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client.shares.needed = mkOption {
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default = 3;
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type = types.int;
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description = ''
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The number of shares required to reconstitute a file.
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'';
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};
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client.shares.happy = mkOption {
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default = 7;
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type = types.int;
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description = ''
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The number of distinct storage nodes required to store
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a file.
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'';
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};
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client.shares.total = mkOption {
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default = 10;
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type = types.int;
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description = ''
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The number of shares required to store a file.
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'';
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};
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storage.enable = mkEnableOption "storage service";
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storage.reservedSpace = mkOption {
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default = "1G";
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type = types.str;
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description = ''
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The amount of filesystem space to not use for storage.
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'';
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};
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helper.enable = mkEnableOption "helper service";
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sftpd.enable = mkEnableOption "SFTP service";
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sftpd.port = mkOption {
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default = null;
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type = types.nullOr types.int;
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description = ''
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The port on which the SFTP server will listen.
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This is the correct setting to tweak if you want Tahoe's SFTP
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daemon to listen on a different port.
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'';
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};
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sftpd.hostPublicKeyFile = mkOption {
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default = null;
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type = types.nullOr types.path;
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description = ''
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Path to the SSH host public key.
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'';
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};
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sftpd.hostPrivateKeyFile = mkOption {
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default = null;
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type = types.nullOr types.path;
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description = ''
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Path to the SSH host private key.
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'';
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};
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sftpd.accounts.file = mkOption {
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default = null;
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type = types.nullOr types.path;
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description = ''
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Path to the accounts file.
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'';
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};
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sftpd.accounts.url = mkOption {
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default = null;
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type = types.nullOr types.str;
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description = ''
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URL of the accounts server.
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'';
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};
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package = mkOption {
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default = pkgs.tahoelafs;
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defaultText = literalExpression "pkgs.tahoelafs";
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type = types.package;
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description = ''
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The package to use for the Tahoe LAFS daemon.
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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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The Tahoe nodes.
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'';
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};
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};
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config = mkMerge [
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(mkIf (cfg.introducers != {}) {
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environment = {
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etc = flip mapAttrs' cfg.introducers (node: settings:
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nameValuePair "tahoe-lafs/introducer-${node}.cfg" {
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mode = "0444";
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text = ''
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# This configuration is generated by Nix. Edit at your own
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# peril; here be dragons.
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[node]
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nickname = ${settings.nickname}
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tub.port = ${toString settings.tub.port}
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${optionalString (settings.tub.location != null)
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"tub.location = ${settings.tub.location}"}
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'';
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});
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# Actually require Tahoe, so that we will have it installed.
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systemPackages = flip mapAttrsToList cfg.introducers (node: settings:
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settings.package
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);
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};
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# Open up the firewall.
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# networking.firewall.allowedTCPPorts = flip mapAttrsToList cfg.introducers
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# (node: settings: settings.tub.port);
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systemd.services = flip mapAttrs' cfg.introducers (node: settings:
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let
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pidfile = "/run/tahoe.introducer-${node}.pid";
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# This is a directory, but it has no trailing slash. Tahoe commands
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# get antsy when there's a trailing slash.
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nodedir = "/var/db/tahoe-lafs/introducer-${node}";
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in nameValuePair "tahoe.introducer-${node}" {
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description = "Tahoe LAFS node ${node}";
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wantedBy = [ "multi-user.target" ];
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path = [ settings.package ];
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restartTriggers = [
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config.environment.etc."tahoe-lafs/introducer-${node}.cfg".source ];
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serviceConfig = {
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Type = "simple";
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PIDFile = pidfile;
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# Believe it or not, Tahoe is very brittle about the order of
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# arguments to $(tahoe run). The node directory must come first,
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# and arguments which alter Twisted's behavior come afterwards.
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ExecStart = ''
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${settings.package}/bin/tahoe run ${lib.escapeShellArg nodedir} --pidfile=${lib.escapeShellArg pidfile}
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'';
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};
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preStart = ''
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if [ ! -d ${lib.escapeShellArg nodedir} ]; then
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mkdir -p /var/db/tahoe-lafs
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# See https://github.com/NixOS/nixpkgs/issues/25273
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tahoe create-introducer \
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--hostname="${config.networking.hostName}" \
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${lib.escapeShellArg nodedir}
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fi
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# Tahoe has created a predefined tahoe.cfg which we must now
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# scribble over.
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# XXX I thought that a symlink would work here, but it doesn't, so
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# we must do this on every prestart. Fixes welcome.
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# rm ${nodedir}/tahoe.cfg
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# ln -s /etc/tahoe-lafs/introducer-${node}.cfg ${nodedir}/tahoe.cfg
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cp /etc/tahoe-lafs/introducer-"${node}".cfg ${lib.escapeShellArg nodedir}/tahoe.cfg
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'';
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});
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users.users = flip mapAttrs' cfg.introducers (node: _:
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nameValuePair "tahoe.introducer-${node}" {
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description = "Tahoe node user for introducer ${node}";
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isSystemUser = true;
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});
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})
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(mkIf (cfg.nodes != {}) {
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environment = {
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etc = flip mapAttrs' cfg.nodes (node: settings:
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nameValuePair "tahoe-lafs/${node}.cfg" {
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mode = "0444";
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text = ''
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# This configuration is generated by Nix. Edit at your own
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# peril; here be dragons.
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[node]
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nickname = ${settings.nickname}
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tub.port = ${toString settings.tub.port}
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${optionalString (settings.tub.location != null)
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"tub.location = ${settings.tub.location}"}
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# This is a Twisted endpoint. Twisted Web doesn't work on
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# non-TCP. ~ C.
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web.port = tcp:${toString settings.web.port}
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[client]
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${optionalString (settings.client.introducer != null)
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"introducer.furl = ${settings.client.introducer}"}
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${optionalString (settings.client.helper != null)
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"helper.furl = ${settings.client.helper}"}
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shares.needed = ${toString settings.client.shares.needed}
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shares.happy = ${toString settings.client.shares.happy}
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shares.total = ${toString settings.client.shares.total}
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[storage]
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enabled = ${boolToString settings.storage.enable}
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reserved_space = ${settings.storage.reservedSpace}
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[helper]
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enabled = ${boolToString settings.helper.enable}
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[sftpd]
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enabled = ${boolToString settings.sftpd.enable}
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${optionalString (settings.sftpd.port != null)
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"port = ${toString settings.sftpd.port}"}
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${optionalString (settings.sftpd.hostPublicKeyFile != null)
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"host_pubkey_file = ${settings.sftpd.hostPublicKeyFile}"}
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${optionalString (settings.sftpd.hostPrivateKeyFile != null)
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"host_privkey_file = ${settings.sftpd.hostPrivateKeyFile}"}
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${optionalString (settings.sftpd.accounts.file != null)
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"accounts.file = ${settings.sftpd.accounts.file}"}
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${optionalString (settings.sftpd.accounts.url != null)
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"accounts.url = ${settings.sftpd.accounts.url}"}
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'';
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});
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# Actually require Tahoe, so that we will have it installed.
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systemPackages = flip mapAttrsToList cfg.nodes (node: settings:
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settings.package
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);
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};
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# Open up the firewall.
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# networking.firewall.allowedTCPPorts = flip mapAttrsToList cfg.nodes
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# (node: settings: settings.tub.port);
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systemd.services = flip mapAttrs' cfg.nodes (node: settings:
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let
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pidfile = "/run/tahoe.${node}.pid";
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# This is a directory, but it has no trailing slash. Tahoe commands
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# get antsy when there's a trailing slash.
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nodedir = "/var/db/tahoe-lafs/${node}";
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in nameValuePair "tahoe.${node}" {
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description = "Tahoe LAFS node ${node}";
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wantedBy = [ "multi-user.target" ];
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path = [ settings.package ];
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restartTriggers = [
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config.environment.etc."tahoe-lafs/${node}.cfg".source ];
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serviceConfig = {
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Type = "simple";
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PIDFile = pidfile;
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# Believe it or not, Tahoe is very brittle about the order of
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# arguments to $(tahoe run). The node directory must come first,
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# and arguments which alter Twisted's behavior come afterwards.
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ExecStart = ''
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${settings.package}/bin/tahoe run ${lib.escapeShellArg nodedir} --pidfile=${lib.escapeShellArg pidfile}
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'';
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};
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preStart = ''
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if [ ! -d ${lib.escapeShellArg nodedir} ]; then
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mkdir -p /var/db/tahoe-lafs
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tahoe create-node --hostname=localhost ${lib.escapeShellArg nodedir}
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fi
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# Tahoe has created a predefined tahoe.cfg which we must now
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# scribble over.
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# XXX I thought that a symlink would work here, but it doesn't, so
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# we must do this on every prestart. Fixes welcome.
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# rm ${nodedir}/tahoe.cfg
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# ln -s /etc/tahoe-lafs/${lib.escapeShellArg node}.cfg ${nodedir}/tahoe.cfg
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cp /etc/tahoe-lafs/${lib.escapeShellArg node}.cfg ${lib.escapeShellArg nodedir}/tahoe.cfg
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'';
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});
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users.users = flip mapAttrs' cfg.nodes (node: _:
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nameValuePair "tahoe.${node}" {
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description = "Tahoe node user for node ${node}";
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isSystemUser = true;
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});
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})
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];
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}
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