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