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rebuild meshing

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asyncnomi 2025-07-21 22:49:14 +02:00
parent 1ff6293bec
commit c2ec3c672b
18 changed files with 90 additions and 55 deletions
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70
shared/commons/mesh.nix
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@ -13,39 +13,48 @@ let
};
generatedSecrets = lib.mapAttrsToList (name: node: buildSecret node.zone node.id) nodes;
generateWireGuardInterface = nodesConfig: let
generateWireGuardInterfaces = nodesConfig: let
myPeer = nodesConfig."${config.hostName}";
myZone = myPeer.zone;
myId = myPeer.id;
# Filter itself out of the peer list
peerConfigs = lib.filterAttrs (_peerName: peerConfig: (peerConfig.zone != myZone) || (peerConfig.id != myId)) nodesConfig;
peers = lib.mapAttrsToList (peerName: peerConfig: {
name = "${peerName}";
publicKey = peerConfig.wg-pub;
allowedIPs = [
"172.19.${toString peerConfig.zone}.${toString peerConfig.id}/32"
"fc00::${toString peerConfig.zone}:${toString peerConfig.id}/128"
];
endpoint = "${builtins.head (builtins.split "/" peerConfig.ip4)}:51820";
persistentKeepalive = 25;
}) peerConfigs;
interface = {
"mesh" = {
ips = [
"172.19.${toString myZone}.${toString myId}/17"
"fc00::${toString myZone}:${toString myId}/96"
];
privateKeyFile = config.age.secrets."wg-private-zone-${toString myZone}-id-${toString myId}".path;
listenPort = 51820;
peers = peers;
};
};
in interface;
peerConfigs = lib.filterAttrs (_peerName: peerConfig: peerConfig.id != myId) nodesConfig;
# We'll make one if per peer, this is more flexible
interfacePeers = lib.flatten (lib.mapAttrsToList (peerName: peerConfig: let
remoteId = peerConfig.id;
wireguardInterfaces = generateWireGuardInterface nodes;
# The mesh is for now only IPv4 based
if4 = {
"mesh-${peerName}" = {
ips = [
"172.19.${toString remoteId}.${toString myId}/32"
"fc00::${toString remoteId}:${toString myId}/128"
];
privateKeyFile = config.age.secrets."wg-private-zone-${toString myZone}-id-${toString myId}".path;
listenPort = 51000 + remoteId;
peers = [{
name = "${peerName}-ip4";
publicKey = peerConfig.wg-pub;
allowedIPs = [
"172.19.${toString myId}.${toString remoteId}/32"
"fc00::${toString myId}:${toString remoteId}/128"
# Allow mgmt transport
"172.19.128.0/17"
"fc00:f::/96"
];
persistentKeepalive = 25;
}];
};
};
in if4) peerConfigs);
interfaces = builtins.foldl' (acc: set: acc // set) {} interfacePeers;
in interfaces;
wireguardInterfaces = generateWireGuardInterfaces nodes;
in
{
age.secrets = lib.lists.foldl' (acc: set: lib.attrsets.recursiveUpdate acc set) {} generatedSecrets;
@ -56,11 +65,14 @@ in
# If custom systemd ordering is needed
# between wg interface and the rest of
# networking: switch to false here
# Note: if you turn it off it will break
# the custom routing for mgmt rt path
# trafic handle by networkd, see networking.nix
networking.wireguard.useNetworkd = true;
# Return all WireGuard interfaces for each node
networking.wireguard.interfaces = wireguardInterfaces;
# Open UDP port for wireguard traffic
networking.firewall.allowedUDPPorts = [ 51820 ];
networking.firewall.allowedUDPPorts = lib.range 51000 52000;
}