allow multiple devs for same subnet
Matthew Salerno
1 year ago
parent
45b70c9063
commit
1e697eb859
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/result
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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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{lib, devNameMethod ? "short", ...}@inputs: keyProviders: intermediateConfig: localPeerName:
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let wnlib = import ../lib.nix {inherit lib;}; in
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with wnlib;
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with lib;
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let
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thisPeer = intermediateConfig.peers."${localPeerName}";
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# these aren't really important, I just wanted to reverse the argument order
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forEachAttr' = flip mapAttrs';
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forEachAttrToList = flip mapAttrsToList;
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devName = getDevName devNameMethod localPeerName;
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in
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with getKeyProviderFuncs keyProviders inputs intermediateConfig localPeerName;
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{
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networking.hosts = foldl' (mergeAttrs) {} (concatLists ( concatLists (forEachAttrToList thisPeer.subnetConnections (subnetName: subnetConnection:
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forEachAttrToList subnetConnection.peerConnections (remotePeerName: peerConnection: forEach peerConnection.ipAddresses (ip: {"${asIp ip}" = ["${remotePeerName}.${subnetName}"];}))
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))));
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systemd.network = {
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netdevs = forEachAttr' thisPeer.subnetConnections (subnetName: subnetConnection: nameValuePair "50-${devName subnetName}" {
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netdevConfig = {
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Kind = "wireguard";
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Name = "${devName subnetName}";
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};
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wireguardConfig = {
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ListenPort = subnetConnection.listenPort;
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PrivateKeyFile = getPrivKeyFile;
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};
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wireguardPeers = forEachAttrToList subnetConnection.peerConnections (remotePeerName: peerConnection: {
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wireguardPeerConfig = {
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Endpoint = "${peerConnection.endpoint.ip}:${builtins.toString peerConnection.endpoint.port}";
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PublicKey = getPeerPubKey remotePeerName;
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AllowedIPs = map (ip: asCidr ip) peerConnection.ipAddresses;
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PresharedKeyFile = getSubnetPSKFile subnetName;
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};
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}
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// (if peerConnection.endpoint ? persistentKeepalive then {PersistentKeepalive = peerConnection.endpoint.persistentKeepalive;} else {})
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// (warnIf (peerConnection.endpoint ? dynamicEndpointRefreshSeconds) "dynamicEndpointRefreshSeconds not supported for networkd" {})
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// (warnIf (peerConnection.endpoint ? dynamicEndpointRefreshRestartSeconds) "dynamicEndpointRefreshRestartSeconds not supported for networkd" {})
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);
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});
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};
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} // getProviderConfig
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{
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version = "v1";
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subnets = [
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{
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name = "ring";
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endpoints = [
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{}
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];
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}
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];
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groups = [
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# groups field is expected, but can be empty
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];
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peers = [
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{
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name = "peer1";
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subnets = {
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ring = {
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listenPort = 51820;
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# empty ipAddresses will auto generate an IPv6 address
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};
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};
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publicKey = "kdyzqV8cBQtDYeW6R1vUug0Oe+KaytHHDS7JoCp/kTE=";
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privateKeyFile = "/etc/wg-key1";
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endpoints = [
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{
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# no match can be any
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ip = "node1";
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port = 51820;
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}
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];
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}
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{
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name = "peer2";
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subnets = {
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ring = {
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listenPort = 51820;
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};
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};
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publicKey = "ztdAXTspQEZUNpxUbUdAhhRWbiL3YYWKSK0ZGdcsMHE=";
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privateKeyFile = "/etc/wg-key2";
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endpoints = [
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{
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# no match can be any
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ip = "node2";
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port = 51820;
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}
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];
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}
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{
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name = "peer3";
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subnets = {
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ring = {
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listenPort = 51821;
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# empty ipAddresses will auto generate an IPv6 address
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};
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};
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publicKey = "43tP6JgckdTFrnbYuy8a42jdNt3+wwVcb4+ae5U4ez4=";
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privateKeyFile = "/etc/wg-key3";
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endpoints = [
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{
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# no match can be any
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ip = "node1";
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port = 51821;
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}
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];
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}
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{
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name = "peer4";
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subnets = {
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ring = {
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listenPort = 51821;
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};
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};
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publicKey = "g6+Tq9aeVfm5CXPIwZDqoTxGmsQ/TlLtxcxVn2aSiVA=";
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privateKeyFile = "/etc/wg-key4";
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endpoints = [
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{
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# no match can be any
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ip = "node2";
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port = 51821;
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}
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];
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}
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];
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connections = [
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{
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a = [{type= "peer"; rule = "is"; value = "peer1";}];
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b = [{type= "peer"; rule = "is"; value = "peer2";}];
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}
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{
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a = [{type= "peer"; rule = "is"; value = "peer2";}];
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b = [{type= "peer"; rule = "is"; value = "peer3";}];
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}
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{
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a = [{type= "peer"; rule = "is"; value = "peer3";}];
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b = [{type= "peer"; rule = "is"; value = "peer4";}];
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}
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{
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a = [{type= "peer"; rule = "is"; value = "peer4";}];
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b = [{type= "peer"; rule = "is"; value = "peer1";}];
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}
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];
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}
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@ -0,0 +1,86 @@
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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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(import ./lib.nix) ({wnlib}:
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{
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name = "double dev ring connection";
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nodes = {
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# `self` here is set by using specialArgs in `lib.nix`
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node1 = { self, pkgs, ... }: {
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virtualisation.vlans = [ 1 ];
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imports = [ self.nixosModules.default ];
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systemd.network.enable = true;
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wirenix = {
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configurer = "networkd";
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devNameMethod = "hash";
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enable = true;
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aclConfig = import ./acls/double-dev-ring.nix;
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peerNames = ["peer1" "peer3"];
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};
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environment.etc."wg-key1" = {
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text = "MIELhEc0I7BseAanhk/+LlY/+Yf7GK232vKWITExnEI=";
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};
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environment.etc."wg-key3" = {
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text = "yPcTvQOK9eVXQjLNapOsv2iAkbOeSzCCxlrWPMe1o0g=";
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};
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environment.systemPackages = [pkgs.wireguard-tools];
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networking.firewall.enable = false;
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};
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node2 = { self, pkgs, ... }: {
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virtualisation.vlans = [ 1 ];
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imports = [ self.nixosModules.default ];
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systemd.network.enable = true;
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wirenix = {
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configurer = "networkd";
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devNameMethod = "hash";
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enable = true;
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keyProviders = ["acl"];
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aclConfig = import ./acls/double-dev-ring.nix;
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peerNames = ["peer2" "peer4"];
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};
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environment.etc."wg-key2" = {
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text = "yG4mJiduoAvzhUJMslRbZwOp1gowSfC+wgY8B/Mul1M=";
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};
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environment.etc."wg-key4" = {
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text = "CLREBQ+oGXsGxhlQc3ufSoBd7MNFoM6KmMnNyuQ9S0E=";
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};
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environment.systemPackages = [pkgs.wireguard-tools];
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networking.firewall.enable = false;
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};
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};
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# This is the test code that will check if our service is running correctly:
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testScript = ''
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start_all()
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nodes = {
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"peer1": node1,
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"peer2": node2,
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"peer3": node1,
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"peer4": node2
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}
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ifaces = {
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"peer1": "${wnlib.getDevName "hash" "peer1" "ring"}",
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"peer2": "${wnlib.getDevName "hash" "peer2" "ring"}",
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"peer3": "${wnlib.getDevName "hash" "peer3" "ring"}",
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"peer4": "${wnlib.getDevName "hash" "peer4" "ring"}"
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}
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connections = {
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"peer1": ["peer2", "peer4"],
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"peer2": ["peer3", "peer1"],
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"peer3": ["peer4", "peer2"],
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"peer4": ["peer1", "peer3"]
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}
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node1.wait_for_unit("systemd-networkd-wait-online")
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node2.wait_for_unit("systemd-networkd-wait-online")
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node1.succeed("ping -c 3 node2 >&2")
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node2.succeed("ping -c 3 node1 >&2")
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for local_name, local_node in nodes.items():
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for remote_name in set(nodes.keys()) - set([local_name]):
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if remote_name in connections[local_name]:
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local_node.succeed(f"ping -c 3 -I {ifaces[local_name]} {remote_name}.ring >&2")
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else:
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local_node.fail(f"ping -c 3 -W 1 -I {ifaces[local_name]} {remote_name}.ring")
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'';
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})
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