253 lines
8.9 KiB
Nix
253 lines
8.9 KiB
Nix
{ config, pkgs, lib, ... }:
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with import ../../lib/pure.nix { inherit lib; }; {
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options.krebs.tinc = mkOption {
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default = {};
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description = ''
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define a tinc network
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'';
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type = types.attrsOf (types.submodule (tinc: {
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options = let
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netname = tinc.config._module.args.name;
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in {
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enable = mkEnableOption "krebs.tinc.${netname}" // { default = true; };
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confDir = mkOption {
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type = types.package;
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default = pkgs.linkFarm "${netname}-etc-tinc"
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(mapAttrsToList (name: path: { inherit name path; }) {
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"hosts" = tinc.config.hostsPackage;
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"tinc.conf" = pkgs.writeText "${netname}-tinc.conf" ''
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Name = ${tinc.config.host.name}
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LogLevel = ${toString tinc.config.logLevel}
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Interface = ${netname}
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Broadcast = no
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${concatMapStrings (c: "ConnectTo = ${c}\n") tinc.config.connectTo}
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Port = ${toString tinc.config.host.nets.${netname}.tinc.port}
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${tinc.config.extraConfig}
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'';
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"tinc-up" = pkgs.writeDash "${netname}-tinc-up" tinc.config.tincUp;
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});
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};
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host = mkOption {
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type = types.host;
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default = config.krebs.build.host;
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};
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netname = mkOption {
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type = types.enum (attrNames tinc.config.host.nets);
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default = netname;
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description = ''
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The tinc network name.
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It is used to name the TUN device and to generate the default value for
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<literal>config.krebs.tinc.retiolum.hosts</literal>.
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'';
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};
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extraConfig = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Extra Configuration to be appended to tinc.conf
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'';
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};
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tincUp = mkOption {
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type = types.str;
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default = let
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net = tinc.config.host.nets.${netname};
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iproute = tinc.config.iproutePackage;
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in /* sh */ ''
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${tinc.config.iproutePackage}/sbin/ip link set ${netname} up
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${optionalString (net.ip4 != null) /* sh */ ''
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${iproute}/sbin/ip -4 addr add ${net.ip4.addr} dev ${netname}
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${iproute}/sbin/ip -4 route add ${net.ip4.prefix} dev ${netname}
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''}
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${optionalString (net.ip6 != null) /* sh */ ''
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${iproute}/sbin/ip -6 addr add ${net.ip6.addr} dev ${netname}
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${iproute}/sbin/ip -6 route add ${net.ip6.prefix} dev ${netname}
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''}
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'';
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defaultText = /* sh */ ''
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ip link set ‹netname› up
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ip -4 addr add ‹net.ip4.addr› dev ‹netname›
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ip -4 route add ‹net.ip4.prefix› dev ‹netname›
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ip -6 addr add ‹net.ip6.addr› dev ‹netname›
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ip -6 route add ‹net.ip6.prefix› dev ‹netname›
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'';
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description = ''
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tinc-up script to be used. Defaults to setting the
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krebs.host.nets.‹netname›.ip4 and ip6 for the new ips and
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configures forwarding of the respecitive netmask as subnet.
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'';
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};
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tincPackage = mkOption {
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type = types.package;
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default = pkgs.tinc_pre;
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description = "Tincd package to use.";
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};
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hosts = mkOption {
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type = with types; attrsOf host;
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default =
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filterAttrs (_: h: hasAttr tinc.config.netname h.nets) config.krebs.hosts;
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defaultText = "‹all-hosts-of-‹netname››";
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description = ''
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Hosts to generate <literal>config.krebs.tinc.retiolum.hostsPackage</literal>.
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Note that these hosts must have a network named
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<literal>config.krebs.tinc.retiolum.netname</literal>.
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'';
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};
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hostsArchive = mkOption {
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type = types.package;
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default = pkgs.runCommand "retiolum-hosts.tar.bz2" {
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nativeBuildInputs = [ pkgs.gnutar pkgs.coreutils ];
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} ''
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cp \
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--no-preserve=mode \
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--recursive \
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${tinc.config.hostsPackage} \
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hosts
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tar -cjf $out hosts
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'';
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readOnly = true;
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};
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hostsPackage = mkOption {
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type = types.package;
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default =
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pkgs.write "${tinc.config.netname}-tinc-hosts"
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(mapAttrs'
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(_: host: nameValuePair "/${host.name}" {
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text = host.nets.${tinc.config.netname}.tinc.config;
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})
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tinc.config.hosts);
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defaultText = "‹netname›-tinc-hosts";
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description = ''
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Package of tinc host configuration files. By default, a package will
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be generated from <literal>config.krebs.‹netname›.hosts</literal>. This
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option's main purpose is to expose the generated hosts package to other
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modules, like <literal>config.krebs.tinc_graphs</literal>. But it can
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also be used to provide a custom hosts directory.
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'';
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example = literalExample ''
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(pkgs.stdenv.mkDerivation {
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name = "my-tinc-hosts";
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src = /home/tv/my-tinc-hosts;
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installPhase = "cp -R . $out";
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})
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'';
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};
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iproutePackage = mkOption {
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type = types.package;
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default = pkgs.iproute2;
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description = "Iproute2 package to use.";
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};
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privkey = mkOption {
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type = types.absolute-pathname;
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default = toString <secrets> + "/${tinc.config.netname}.rsa_key.priv";
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defaultText = "‹secrets/‹netname›.rsa_key.priv›";
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};
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privkey_ed25519 = mkOption {
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type = types.nullOr types.absolute-pathname;
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default =
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if tinc.config.host.nets.${netname}.tinc.pubkey_ed25519 == null
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then null
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else toString <secrets> + "/${tinc.config.netname}.ed25519_key.priv";
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defaultText = "‹secrets/‹netname›.ed25519_key.priv›";
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};
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connectTo = mkOption {
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type = types.listOf types.str;
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${if netname == "retiolum" then "default" else null} = [
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"eve"
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"ni"
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"prism"
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];
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description = ''
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The list of hosts in the network which the client will try to connect
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to. These hosts should have an 'Address' configured which points to a
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routeable IPv4 or IPv6 address.
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In stockholm this can be done by configuring:
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{
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krebs.hosts.‹host›.nets.‹netname›.via.ip4.addr = external-ip;
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krebs.hosts.‹host›.nets.‹netname›.tinc.port = 1655;
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}
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'';
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};
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logLevel = mkOption {
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type = types.int;
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description = ''
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LogLevel in tinc.conf
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'';
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default = 3;
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};
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username = mkOption {
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type = types.username;
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default = tinc.config.netname;
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defaultText = literalExample "netname";
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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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krebs.systemd.services = mapAttrs (netname: cfg: {
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restartIfCredentialsChange = true;
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}) config.krebs.tinc;
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systemd.services = mapAttrs (netname: cfg: {
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description = "Tinc daemon for ${netname}";
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after = [ "network.target" ];
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wantedBy = [ "multi-user.target" ];
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# Restart the service in a single step in order to prevent potential
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# connection timeouts and subsequent issues while deploying via tinc.
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stopIfChanged = false;
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serviceConfig = {
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Restart = "always";
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LoadCredential = filter (x: x != "") [
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(optionalString (cfg.privkey_ed25519 != null)
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"ed25519_key.priv:${cfg.privkey_ed25519}"
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)
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"rsa_key.priv:${cfg.privkey}"
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];
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ExecStartPre = "+" + pkgs.writers.writeDash "init-tinc-${netname}" ''
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set -efu
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${pkgs.coreutils}/bin/mkdir -p /etc/tinc
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${pkgs.rsync}/bin/rsync -Lacv --delete \
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--chown ${cfg.username} \
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--chmod u=rwX,g=rX \
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--exclude='/*.priv' \
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${cfg.confDir}/ /etc/tinc/${netname}/
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${optionalString (cfg.privkey_ed25519 != null) /* sh */ ''
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${pkgs.coreutils}/bin/ln -fns \
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"$CREDENTIALS_DIRECTORY"/ed25519_key.priv \
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/etc/tinc/${netname}/
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''}
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${pkgs.coreutils}/bin/ln -fns \
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"$CREDENTIALS_DIRECTORY"/rsa_key.priv \
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/etc/tinc/${netname}/
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'';
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ExecStart = "+" + toString [
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"${cfg.tincPackage}/sbin/tincd"
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"-D"
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"-U ${cfg.username}"
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"-d 0"
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"-n ${netname}"
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];
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SyslogIdentifier = netname;
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DynamicUser = true;
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User = cfg.username;
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};
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}) config.krebs.tinc;
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};
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}
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