204 lines
5.8 KiB
Nix
204 lines
5.8 KiB
Nix
{ zentralwerk, hostRegistry, config, options, lib, pkgs, ... }:
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let
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cfg = config.c3d2;
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hqPrefix64 = lib.removeSuffix "::" (builtins.head (
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builtins.split "/" zentralwerk.lib.config.site.net.c3d2.subnets6.dn42
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));
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neighMod = with lib; types.submodule {
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options = {
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addrs = mkOption {
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type = with types; attrsOf str;
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default = { };
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};
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via = mkOption
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{
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type = with types; listOf str;
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default = [ ];
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};
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} // (with builtins; let value = mkOption { type = types.str; }; in
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listToAttrs (map (name: { inherit name value; }) [ "exchpub" "id" "noisepub" "signpub" ]));
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};
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# Generate a deterministic IPv6 address for a 64 bit prefix
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# and seed string. Prefix must not contain trailing ':'.
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toIpv6Address = prefix64: seed:
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with builtins;
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let
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digest = builtins.hashString "sha256" seed;
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hextets = map (i: substring (4 * i) 4 digest) [ 0 1 2 3 ];
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in
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concatStringsSep ":" ([ prefix64 ] ++ hextets);
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# Generate a deterministic public IPv6 addresses
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# for the HQ networking using a seed string.
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toHqPrivateAddress = toIpv6Address hqPrefix64;
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in
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{
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options.c3d2 = {
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mergeNncpSettings = lib.mkEnableOption ''
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Whether to merge <literal>c3d2.nncp.<…>.nncp</literal>
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into <literal>programs.nncp.settings</literal>.
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'';
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k-ot.enable = lib.mkEnableOption ''
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Add k-ot user to this machine. Anyone with an SSH key listed in
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<literal>c3d2.users</literal> can log in as this user.
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'';
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hq = {
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interface = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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example = "eth0";
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description = ''
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Configure the given interface name with an internal IP address.
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'';
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};
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journalToMqtt = lib.mkOption {
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type = lib.types.bool;
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# broken :(
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default = false;
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};
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};
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nncp.neigh = lib.mkOption {
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type = with lib.types; attrsOf neighMod;
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default = { };
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description = ''
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Attrset of NNCP neighbours for relaying packets.
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User endpoints go in <literal>c3d2.users</literal>.
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'';
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};
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sshKeys = lib.mkOption {
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type = with lib.types; attrsOf (listOf str);
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default = [ ];
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};
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};
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config = {
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programs.nncp.settings = lib.optionalAttrs cfg.mergeNncpSettings cfg.nncp;
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users =
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let
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adminKeys = with builtins; lib.lists.flatten (attrValues cfg.sshKeys);
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in
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{
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users = {
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k-ot = lib.mkIf cfg.k-ot.enable {
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createHome = true;
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isNormalUser = true;
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uid = 1000;
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extraGroups = [
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"audio"
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"video"
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"wheel"
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];
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password = "k-otk-ot";
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openssh.authorizedKeys.keys = adminKeys;
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};
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root.openssh.authorizedKeys.keys = adminKeys;
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};
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};
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services.vector = lib.mkIf config.c3d2.hq.journalToMqtt {
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enable = true;
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journaldAccess = true;
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settings = {
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sources.journal = {
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type = "journald";
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current_boot_only = true;
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};
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sinks.mqtt = {
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inputs = [ "journal" ];
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type = "mqtt";
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host = "broker.serv.zentralwerk.org";
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# port = 8883;
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user = "SECRET[mqtt.user]";
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password = "SECRET[mqtt.password]";
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client_id = "vector-${config.networking.hostName}";
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encoding.codec = "json";
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topic = "journal/{{ host }}/{{ _SYSTEMD_UNIT }}/{{ PRIORITY }}";
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# tls.enabled = true;
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# tls.ca_file = "/etc/ssl/certs/ca-certificates.crt";
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};
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secret.mqtt =
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let
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catSecrets = pkgs.writeScript "cat-vector-secrets" ''
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#!${pkgs.runtimeShell} -e
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echo '{'
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COMMA=n
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for F in $@; do
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if [ $COMMA = y ]; then
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echo ' ,'
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else
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COMMA=y
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fi
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echo ' "'$(basename $F)'": {"value": "'$(cat $F)'", "error": null }'
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done
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echo '}'
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'';
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in
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{
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type = "exec";
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command = [
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catSecrets
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config.sops.secrets."mqtt/user".path
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config.sops.secrets."mqtt/password".path
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];
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};
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};
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};
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sops.secrets = lib.mkIf config.c3d2.hq.journalToMqtt {
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"mqtt/user" = {
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sopsFile = ../modules/mqtt.yaml;
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owner = config.systemd.services.vector.serviceConfig.User;
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};
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"mqtt/password" = {
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sopsFile = ../modules/mqtt.yaml;
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owner = config.systemd.services.vector.serviceConfig.User;
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};
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};
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systemd.network.networks = lib.mkIf (cfg.hq.interface != null && config.networking.useNetworkd) {
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"40-eth0".routes = [{
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routeConfig = {
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Gateway = "172.22.99.4";
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GatewayOnLink = true;
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};
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}];
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};
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networking = {
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interfaces = lib.mkIf (cfg.hq.interface != null) {
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"${cfg.hq.interface}".ipv6.addresses = [{
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address = toHqPrivateAddress config.networking.hostName;
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prefixLength = 64;
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}];
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};
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nameservers = with hostRegistry.dnscache; [
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ip4
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ip6
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"9.9.9.9"
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];
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useHostResolvConf = lib.mkIf (!config.services.resolved.enable) true;
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};
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environment.etc."resolv.conf" = lib.mkIf (!config.services.resolved.enable) {
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text = lib.concatMapStrings
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(ns: ''
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nameserver ${ns}
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'')
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config.networking.nameservers;
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};
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};
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}
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