os/modules/wireguard/private.nix

109 lines
3 KiB
Nix

{
lib,
config,
pkgs,
...
}:
with lib; let
psCfg = config.pub-solar;
cfg = config.pub-solar.wireguard.private;
in {
options.pub-solar.wireguard.private = {
ownIPs = mkOption {
description = ''
Internal ips in wireguard used for cluster control-plane communication.
'';
type = types.listOf types.str;
default = [];
};
privateKeyFile = mkOption {
description = ''
Location of private key file
'';
type = types.path;
};
useDNS = mkOption {
description = ''
Whether to use the wireguard DNS
'';
default = true;
type = types.bool;
};
fullTunnel = mkOption {
description = ''
Whether to tunnel all traffic through the wireguard VPN
'';
default = false;
type = types.bool;
};
};
config = mkIf (builtins.length cfg.ownIPs != 0) {
networking.firewall.allowedUDPPorts = [51899];
systemd.services.wireguard-wg-private = {
after = [
"network.target"
"network-online.target"
"nss-lookup.target"
];
serviceConfig = {
Type = mkForce "simple";
Restart = "on-failure";
RestartSec = "30";
};
environment = {
WG_ENDPOINT_RESOLUTION_RETRIES = "infinity";
};
};
networking.wireguard.interfaces = {
wg-private = {
listenPort = 51899;
mtu = 1300;
ips = cfg.ownIPs;
privateKeyFile = cfg.privateKeyFile;
postSetup = ""
+ (if cfg.useDNS then ''
printf "nameserver 10.13.12.7\nnameserver fd00:b12f:acab:1312:acab:7::" | resolvconf -a wg-private -m 0 -x
'' else "")
+ (if cfg.fullTunnel then ''
defaultRoute=$(${pkgs.iproute2}/bin/ip r | ${pkgs.gnugrep}/bin/grep "default via" | head -n 1 | ${pkgs.gawk}/bin/awk '{ print $3 " " $4 " " $5 }')
ipv4=$(${pkgs.dnsutils}/bin/dig +short A vpn.b12f.io)
${pkgs.iproute2}/bin/ip route add $ipv4 metric 256 via $defaultRoute
ipv6=$(${pkgs.dnsutils}/bin/dig +short AAAA vpn.b12f.io)
${pkgs.iproute2}/bin/ip route add $ipv6 metric 256 via $defaultRoute
ip -4 route delete default dev wg-private || true
ip -4 route replace default dev wg-private metric 512
ip -6 route delete default dev wg-private || true
ip -6 route replace default dev wg-private metric 512
'' else "");
postShutdown = lib.mkIf cfg.useDNS ''
resolvconf -d wg-private -f
'';
peers = [
{
# frikandel
publicKey = "p6YKNYBlySKfhTN+wbSsKdoNjzko/XSAiTAlCJzP1jA=";
allowedIPs = [
"10.13.12.0/24"
"fd00:b12f:acab:1312::/64"
] ++ (if cfg.fullTunnel then [
"0.0.0.0/0"
"::/0"
] else []);
endpoint = "vpn.b12f.io:51899";
persistentKeepalive = 30;
dynamicEndpointRefreshSeconds = 30;
}
];
};
};
};
}