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{ flake, config, pkgs, lib, ... }:
{
config = {
services.kea = {
dhcp4 = {
enable = true;
settings = {
valid-lifetime = 4000;
rebind-timer = 2000;
renew-timer = 1000;
interfaces-config = {
interfaces = [ "lan" "mgmt" ];
};
lease-database = {
name = "/var/lib/kea/dhcp4.leases";
persist = true;
type = "memfile";
};
client-classes = [
{ name = "ipxe";
test = "option[77].hex == 'iPXE'";
next-server = "10.141.0.1";
boot-file-name = "netboot.ipxe";
only-if-required = true;
}
{ name = "uefi-64";
test = "substring(option[60].hex,0,20) == 'PXEClient:Arch:00007' or substring(option[60].hex,0,20) == 'PXEClient:Arch:00008' or substring(option[60].hex,0,20) == 'PXEClient:Arch:00009'";
only-if-required = true;
option-data = [
{ name = "tftp-server-name"; data = "10.141.0.1"; }
];
boot-file-name = "ipxe.efi";
}
{ name = "uefi-32";
test = "substring(option[60].hex,0,20) == 'PXEClient:Arch:00002' or substring(option[60].hex,0,20) == 'PXEClient:Arch:00006'";
only-if-required = true;
option-data = [
{ name = "tftp-server-name"; data = "10.141.0.1"; }
];
boot-file-name = "i386-ipxe.efi";
}
{ name = "legacy";
test = "substring(option[60].hex,0,20) == 'PXEClient:Arch:00000'";
only-if-required = true;
option-data = [
{ name = "tftp-server-name"; data = "10.141.0.1"; }
];
boot-file-name = "undionly.kpxe";
}
];
dhcp-ddns.enable-updates = true;
ddns-send-updates = false;
ddns-override-client-update = true;
ddns-override-no-update = true;
ddns-replace-client-name = "when-not-present";
ddns-generated-prefix = "noname";
ddns-update-on-renew = true;
subnet4 = [
{ subnet = "10.141.0.0/24";
option-data = [
{ name = "domain-name-servers";
data = "10.141.0.1";
}
{ name = "broadcast-address";
data = "10.141.0.255";
}
{ name = "routers";
data = "10.141.0.1";
}
{ name = "domain-name";
data = "yggdrasil";
}
{ name = "domain-search";
data = "lan.yggdrasil, yggdrasil";
}
];
ddns-send-updates = true;
ddns-qualifying-suffix = "lan.yggdrasil";
pools = [ { pool = "10.141.0.128 - 10.141.0.254"; } ];
require-client-classes = ["ipxe" "uefi-64" "uefi-32" "legacy"];
reservations = [
{ hostname = "sif";
hw-address = "3c:e1:a1:52:24:35";
}
{ hostname = "sif";
hw-address = "ee:32:68:76:83:ac";
}
{ hostname = "sif";
hw-address = "48:2a:e3:64:62:97";
}
{ hostname = "eos";
hw-address = "00:d8:61:79:c5:40";
}
];
}
{ subnet = "10.141.1.0/24";
option-data = [
{ name = "domain-name-servers";
data = "10.141.1.1";
}
{ name = "broadcast-address";
data = "10.141.1.255";
}
{ name = "domain-name";
data = "yggdrasil";
}
{ name = "domain-search";
data = "mgmt.yggdrasil, yggdrasil";
}
];
ddns-send-updates = true;
ddns-qualifying-suffix = "mgmt.yggdrasil";
pools = [ { pool = "10.141.1.128 - 10.141.1.254"; } ];
reservations = [
{ hostname = "switch01";
hw-address = "60:a4:b7:53:94:b5";
ip-address = "10.141.1.2";
}
{ hostname = "ap01";
hw-address = "74:ac:b9:29:ad:9a";
ip-address = "10.141.1.4";
}
];
}
{ subnet = "10.141.2.0/24";
option-data = [
{ name = "domain-name-servers";
data = "10.141.2.1";
}
{ name = "broadcast-address";
data = "10.141.2.255";
}
{ name = "routers";
data = "10.141.2.1";
}
];
ddns-send-updates = false;
pools = [ { pool = "10.141.2.128 - 10.141.2.254"; } ];
reservations = [];
}
];
};
};
dhcp6 = {
enable = true;
settings = {
interfaces-config = {
interfaces = [ "lan" ];
};
lease-database = {
name = "/var/lib/kea/dhcp6.leases";
persist = true;
type = "memfile";
};
};
};
dhcp-ddns = {
enable = true;
settings = {
forward-ddns = {
ddns-domains = [
{ name = "lan.yggdrasil.";
dns-servers = [
{ ip-address = "127.0.0.1";
port = 5353;
key-name = "local_key";
}
];
}
{ name = "mgmt.yggdrasil.";
dns-servers = [
{ ip-address = "127.0.0.1";
port = 5353;
key-name = "local_key";
}
];
}
];
};
reverse-ddns = {
ddns-domains = [
{ name = "0.141.10.in-addr.arpa.";
dns-servers = [
{ ip-address = "127.0.0.1";
port = 5353;
key-name = "local_key";
}
];
}
{ name = "1.141.10.in-addr.arpa.";
dns-servers = [
{ ip-address = "127.0.0.1";
port = 5353;
key-name = "local_key";
}
];
}
];
};
};
};
};
systemd.services.kea-dhcp-ddns-server = {
preStart = let
configLines = [
"<?include \"\${CREDENTIALS_DIRECTORY}/knot-tsig.json.frag\"?>"
] ++ lib.mapAttrsToList (k: v:
"\"${k}\": ${builtins.toJSON v}"
) config.services.kea.dhcp-ddns.settings;
config-template = pkgs.writeText "dhcp-ddns.conf" ''
{"DhcpDdns": {
${lib.concatStringsSep ",\n " configLines}
}}
'';
in ''
${pkgs.envsubst}/bin/envsubst -i "${config-template}" -o "''${RUNTIME_DIRECTORY}/dhcp-ddns.conf"
'';
serviceConfig = {
ExecStart = lib.mkForce ''
${pkgs.kea}/bin/kea-dhcp-ddns -c "''${RUNTIME_DIRECTORY}/dhcp-ddns.conf" ${lib.escapeShellArgs config.services.kea.dhcp-ddns.extraArgs}
'';
LoadCredential = [
"knot-tsig.json.frag:${config.sops.secrets."kea-knot-tsig.json.frag".path}"
];
};
};
sops.secrets."kea-knot-tsig.json.frag" = {
format = "binary";
sopsFile = ./knot-tsig.json.frag;
};
systemd.services."installer-atftpd" = {
description = "TFTP Server for PXE Booting NixOS Installer";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig.ExecStart = let
installerBuild = flake.nixosConfigurations.installer-x86_64-linux-netboot.config.system.build;
ipxe = pkgs.ipxe.override {
additionalTargets = {
"bin-i386-efi/ipxe.efi" = "i386-ipxe.efi";
};
};
tftpRoot = pkgs.runCommandLocal "installer-netboot" {} ''
mkdir -p $out
install -m 0444 -t $out \
${installerBuild.netbootRamdisk}/initrd \
${installerBuild.kernel}/bzImage \
${installerBuild.netbootIpxeScript}/netboot.ipxe \
${ipxe}/ipxe.efi ${ipxe}/i386-ipxe.efi ${ipxe}/undionly.kpxe
'';
in "${pkgs.atftp}/sbin/atftpd --daemon --no-fork --bind-address=10.141.0.1 ${tftpRoot}";
};
};
}
|
