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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-${cfg.interface}" = {
matchConfig.Name = cfg.interface;
vlan = cfg.join;
# Accept DHCP on physical interface
DHCP = "ipv4";
# Network is up when xnet physical interface gets carrier
linkConfig.RequiredForOnline = "carrier";
};
networks."${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);
};
}
|
