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{ config, pkgs, lib, ... }:
with config.krebs.lib;
let
cfg = config.krebs.retiolum;
out = {
options.krebs.retiolum = api;
config = lib.mkIf cfg.enable imp;
};
api = {
enable = mkEnableOption "krebs.retiolum";
host = mkOption {
type = types.host;
default = config.krebs.build.host;
};
netname = mkOption {
type = types.enum (attrNames cfg.host.nets);
default = "retiolum";
description = ''
The tinc network name.
It is used to name the TUN device and to generate the default value for
<literal>config.krebs.retiolum.hosts</literal>.
'';
};
extraConfig = mkOption {
type = types.str;
default = "";
description = ''
Extra Configuration to be appended to tinc.conf
'';
};
tincPackage = mkOption {
type = types.package;
default = pkgs.tinc;
description = "Tincd package to use.";
};
hosts = mkOption {
type = with types; attrsOf host;
default =
filterAttrs (_: h: hasAttr cfg.netname h.nets) config.krebs.hosts;
description = ''
Hosts to generate <literal>config.krebs.retiolum.hostsPackage</literal>.
Note that these hosts must have a network named
<literal>config.krebs.retiolum.netname</literal>.
'';
};
hostsPackage = mkOption {
type = types.package;
default = pkgs.stdenv.mkDerivation {
name = "${cfg.netname}-tinc-hosts";
phases = [ "installPhase" ];
installPhase = ''
mkdir $out
${concatStrings (mapAttrsToList (_: host: ''
echo ${shell.escape host.nets.${cfg.netname}.tinc.config} \
> $out/${shell.escape host.name}
'') cfg.hosts)}
'';
};
description = ''
Package of tinc host configuration files. By default, a package will
be generated from <literal>config.krebs.retiolum.hosts</literal>. This
option's main purpose is to expose the generated hosts package to other
modules, like <literal>config.krebs.tinc_graphs</literal>. But it can
also be used to provide a custom hosts directory.
'';
example = literalExample ''
(pkgs.stdenv.mkDerivation {
name = "my-tinc-hosts";
src = /home/tv/my-tinc-hosts;
installPhase = "cp -R . $out";
})
'';
};
iproutePackage = mkOption {
type = types.package;
default = pkgs.iproute;
description = "Iproute2 package to use.";
};
privateKeyFile = mkOption {
# TODO if it's types.path then it gets copied to /nix/store with
# bad unsafe permissions...
type = types.str;
default = toString <secrets/retiolum.rsa_key.priv>;
description = ''
Generate file with <literal>tincd -K</literal>.
This file must exist on the local system. The default points to
<secrets/retiolum.rsa_key.priv>.
'';
};
connectTo = mkOption {
type = types.listOf types.str;
default = [ "fastpoke" "cd" "prism" "gum" ];
description = ''
The list of hosts in the network which the client will try to connect
to. These hosts should have an 'Address' configured which points to a
routeable IPv4 or IPv6 address.
'';
};
};
imp = {
environment.systemPackages = [ tinc iproute ];
systemd.services.${cfg.netname} = {
description = "Tinc daemon for Retiolum";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
path = [ tinc iproute ];
serviceConfig = rec {
PermissionsStartOnly = "true";
PrivateTmp = "true";
Restart = "always";
# TODO we cannot chroot (-R) b/c we use symlinks to hosts
# and the private key.
ExecStartPre = pkgs.writeScript "${cfg.netname}-prestart" ''
#! /bin/sh
install -o ${user.name} -m 0400 ${cfg.privateKeyFile} /tmp/retiolum-rsa_key.priv
'';
ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user.name} -D --pidfile=/var/run/tinc.${SyslogIdentifier}.pid";
SyslogIdentifier = cfg.netname;
};
};
users.extraUsers = singleton {
inherit (user) name uid;
};
};
user = rec {
name = cfg.netname;
uid = genid name;
};
net = cfg.host.nets.${cfg.netname};
tinc = cfg.tincPackage;
iproute = cfg.iproutePackage;
confDir = let
namePathPair = name: path: { inherit name path; };
in pkgs.linkFarm "${cfg.netname}-etc-tinc" (mapAttrsToList namePathPair {
"hosts" = cfg.hostsPackage;
"tinc.conf" = pkgs.writeText "${cfg.netname}-tinc.conf" ''
Name = ${cfg.host.name}
Interface = ${cfg.netname}
${concatStrings (map (c: "ConnectTo = ${c}\n") cfg.connectTo)}
PrivateKeyFile = /tmp/retiolum-rsa_key.priv
${cfg.extraConfig}
'';
"tinc-up" = pkgs.writeScript "${cfg.netname}-tinc-up" ''
${iproute}/sbin/ip link set ${cfg.netname} up
${optionalString (net.ip4 != null) ''
${iproute}/sbin/ip -4 addr add ${net.ip4.addr} dev ${cfg.netname}
${iproute}/sbin/ip -4 route add ${net.ip4.prefix} dev ${cfg.netname}
''}
${optionalString (net.ip6 != null) ''
${iproute}/sbin/ip -6 addr add ${net.ip6.addr} dev ${cfg.netname}
${iproute}/sbin/ip -6 route add ${net.ip6.prefix} dev ${cfg.netname}
''}
'';
});
in out
|
