301 lines
10 KiB
Nix
301 lines
10 KiB
Nix
with import <stockholm/lib>;
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{ config, pkgs, ... }:
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let
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out = {
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options.krebs.tinc = api;
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config = imp;
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};
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api = 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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Interface = ${netname}
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Broadcast = no
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${concatMapStrings (c: "ConnectTo = ${c}\n") tinc.config.connectTo}
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${optionalString (tinc.config.privkey_ed25519 != null)
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"Ed25519PrivateKeyFile = ${tinc.config.privkey_ed25519.path}"
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}
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PrivateKeyFile = ${tinc.config.privkey.path}
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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" ''
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${tinc.config.iproutePackage}/sbin/ip link set ${netname} up
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${tinc.config.tincUp}
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'';
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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.str;
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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.${netname};
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iproute = tinc.config.iproutePackage;
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in ''
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${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 ${netname}
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''}
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${tinc.config.tincUpExtra}
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'';
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defaultText = ''
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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 ${netname}
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${tinc.config.tincUpExtra}
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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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tincUpExtra = mkOption {
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type = types.str;
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default = "";
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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 $out hosts
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'';
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readOnly = true;
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};
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hostsPackage = mkOption {
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type = types.package;
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default = pkgs.stdenv.mkDerivation {
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name = "${tinc.config.netname}-tinc-hosts";
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phases = [ "installPhase" ];
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installPhase = ''
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mkdir $out
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${concatStrings (mapAttrsToList (_: host: ''
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echo ${shell.escape host.nets."${tinc.config.netname}".tinc.config} \
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> $out/${shell.escape host.name}
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'') tinc.config.hosts)}
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'';
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};
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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 . $out";
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})
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'';
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};
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iproutePackage = mkOption {
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type = types.package;
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default = pkgs.iproute;
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description = "Iproute2 package to use.";
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};
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privkey = mkOption {
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type = types.secret-file;
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default = {
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name = "${tinc.config.netname}.rsa_key.priv";
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path = "${tinc.config.user.home}/tinc.rsa_key.priv";
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owner = tinc.config.user;
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source-path = toString <secrets> + "/${tinc.config.netname}.rsa_key.priv";
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};
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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.secret-file;
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default =
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if config.krebs.hosts.${tinc.config.host.name}.nets.${tinc.config.netname}.tinc.pubkey_ed25519 == null then null else {
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name = "${tinc.config.netname}.ed25519_key.priv";
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path = "${tinc.config.user.home}/tinc.ed25519_key.priv";
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owner = tinc.config.user;
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source-path = toString <secrets> + "/${tinc.config.netname}.ed25519_key.priv";
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};
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defaultText = "‹secrets/‹netname›.ed25519_key.priv›";
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};
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connectTo = mkOption {
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type = types.listOf types.str;
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${if netname == "retiolum" then "default" else null} = [
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"gum"
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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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user = mkOption {
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type = types.user;
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default = {
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name = tinc.config.netname;
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home = "/var/lib/${tinc.config.user.name}";
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};
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defaultText = {
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name = "‹netname›";
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home = "/var/lib/‹netname›";
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};
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};
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};
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}));
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};
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imp = {
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# TODO `environment.systemPackages = [ cfg.tincPackage cfg.iproutePackage ]` for each network,
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# avoid conflicts in environment if the packages differ
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krebs.secret.files =
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let
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ed25519_keys =
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filterAttrs
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(_: key: key != null)
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(mapAttrs'
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(netname: cfg:
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nameValuePair "${netname}.ed25519_key.priv" cfg.privkey_ed25519
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)
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config.krebs.tinc);
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rsa_keys =
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mapAttrs'
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(netname: cfg: nameValuePair "${netname}.rsa_key.priv" cfg.privkey)
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config.krebs.tinc;
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in
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ed25519_keys // rsa_keys;
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users.users = mapAttrs' (netname: cfg:
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nameValuePair "${netname}" {
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inherit (cfg.user) home name uid;
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createHome = true;
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isSystemUser = true;
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group = netname;
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}
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) config.krebs.tinc;
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users.groups = mapAttrs' (netname: cfg:
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nameValuePair netname {}
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) config.krebs.tinc;
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environment.etc = mapAttrs' (netname: cfg:
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nameValuePair "tinc/${netname}" {
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source = cfg.confDir;
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}
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) config.krebs.tinc;
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systemd.services = mapAttrs (netname: cfg:
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let
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tinc = cfg.tincPackage;
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iproute = cfg.iproutePackage;
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in {
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description = "Tinc daemon for ${netname}";
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after = [
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"network.target"
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config.krebs.secret.files."${netname}.rsa_key.priv".service
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] ++ optionals (cfg.privkey_ed25519 != null) [
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config.krebs.secret.files."${netname}.ed25519_key.priv".service
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];
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partOf = [
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config.krebs.secret.files."${netname}.rsa_key.priv".service
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] ++ optionals (cfg.privkey_ed25519 != null) [
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config.krebs.secret.files."${netname}.ed25519_key.priv".service
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];
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wantedBy = [ "multi-user.target" ];
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path = [ tinc iproute ];
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reloadIfChanged = true;
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restartTriggers = [ cfg.confDir ];
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serviceConfig = rec {
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Restart = "always";
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ExecStart = "${tinc}/sbin/tincd -c /etc/tinc/${netname} -d 0 -U ${cfg.user.name} -D --pidfile=/var/run/tinc.${SyslogIdentifier}.pid";
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ExecReload = "${tinc}/sbin/tinc -n ${netname} reload";
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SyslogIdentifier = netname;
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};
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}
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) config.krebs.tinc;
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};
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in out
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