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authorKleidi Bujari <mail@4kb.net>2025-04-02 21:59:20 -0400
committerKleidi Bujari <mail@4kb.net>2025-04-02 21:59:20 -0400
commit09c2b6de63a6ff35348fcb2c2eb57b974f0a8a52 (patch)
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Diffstat (limited to 'machines/xnet/net/default.nix')
-rw-r--r--machines/xnet/net/default.nix128
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diff --git a/machines/xnet/net/default.nix b/machines/xnet/net/default.nix
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--- a/machines/xnet/net/default.nix
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-{ config, lib, ... }:
-let
- cfg = config.xnet.net;
-
- inherit (builtins)
- attrNames
- attrValues
- map
- length
- ;
-
- inherit (lib)
- concatLines
- genAttrs
- mapAttrsToList
- mergeAttrsList
- mkOption
- mkIf
- types
- ;
-
- # Networks are logical groupings of hosts wired together. This is
- # accomplished using VLANS on the same layer 2 network.
- #
- # Hosts can hard code their spot on a network here. This module aims
- # to generate network information for a host using this set of facts.
- # The module should gracefully fall back to defaults if a given fact
- # is not specified for the host consuming the module.
- #
- # A host will have it's /etc/hosts populated with all other hosts in
- # a network to avoid a dynamic DNS server.
- networks = {
-
- # Open network for xnet hosts
- plaza = {
- mask = 24;
- vlan = 88;
- hosts = {
- t1 = "10.88.88.1";
- radon = "10.88.88.2";
- iridium = "10.88.88.3";
- };
- };
-
- # Reserved network for kubernetes related nodes. A distinct network
- # is created here for hosts that provide resources to workers.
- # Generally, nodes on this network are spawned dynamically and are
- # not a part of this NixOS config directly, although they may boot
- # from assets served from a node here.
- kubenet = {
- mask = 24;
- vlan = 42;
- hosts = {
- iridium = "10.88.42.254";
- };
- };
- };
-in
-{
- imports = [
- ./sshd.nix
- ./dns.nix
- ];
-
- options.xnet.net = {
- join = mkOption {
- type = types.listOf (types.enum (attrNames networks));
- default = [ ];
- description = "Available networks.";
- };
-
- interface = mkOption {
- type = types.str;
- default = "";
- description = "Network interface connecting to xnet.";
- };
- };
-
- config = mkIf ((length cfg.join) > 0) {
- # networkd will handle this
- networking.useDHCP = false;
-
- systemd.network =
- let
- name = config.networking.hostName;
-
- genConfig = net: {
- netdevs."${toString networks.${net}.vlan}-${net}" = {
- netdevConfig.Kind = "vlan";
- netdevConfig.Name = net;
- vlanConfig.Id = networks.${net}.vlan;
- };
-
- networks."10-${cfg.interface}" = {
- matchConfig.Name = cfg.interface;
- vlan = cfg.join;
-
- # Accept DHCP on physical interface
- DHCP = "ipv4";
-
- # Network is up when xnet physical interface gets carrier
- linkConfig.RequiredForOnline = "carrier";
-
- # Allow resolved to resolve mDNS
- networkConfig.MulticastDNS = true;
- };
-
- networks."${toString networks.${net}.vlan}-${net}" = {
- matchConfig.Name = net;
-
- # Set up address for known host
- address = [ "${networks.${net}.hosts.${name}}/${toString networks.${net}.mask}" ];
- };
- };
-
- values = attrValues (genAttrs cfg.join genConfig);
- in
- { enable = true; } // mergeAttrsList values;
-
- networking.extraHosts =
- let
- genHosts = net: concatLines
- (mapAttrsToList (name: value: "${value} ${name} ${name}.${net}.4kb.net")
- networks.${net}.hosts);
- in
- concatLines (map (net: genHosts net) cfg.join);
- };
-}