449 lines
13 KiB
Nix
449 lines
13 KiB
Nix
{ config
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, lib
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, pkgs
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, ...
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}:
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with lib;
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let
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cfg = config.services.kea;
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xor = x: y: (!x && y) || (x && !y);
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format = pkgs.formats.json {};
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chooseNotNull = x: y: if x != null then x else y;
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ctrlAgentConfig = chooseNotNull cfg.ctrl-agent.configFile (format.generate "kea-ctrl-agent.conf" {
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Control-agent = cfg.ctrl-agent.settings;
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});
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dhcp4Config = chooseNotNull cfg.dhcp4.configFile (format.generate "kea-dhcp4.conf" {
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Dhcp4 = cfg.dhcp4.settings;
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});
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dhcp6Config = chooseNotNull cfg.dhcp6.configFile (format.generate "kea-dhcp6.conf" {
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Dhcp6 = cfg.dhcp6.settings;
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});
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dhcpDdnsConfig = chooseNotNull cfg.dhcp-ddns.configFile (format.generate "kea-dhcp-ddns.conf" {
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DhcpDdns = cfg.dhcp-ddns.settings;
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});
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package = pkgs.kea;
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in
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{
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options.services.kea = with types; {
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ctrl-agent = mkOption {
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description = ''
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Kea Control Agent configuration
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'';
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default = {};
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type = submodule {
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options = {
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enable = mkEnableOption "Kea Control Agent";
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extraArgs = mkOption {
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type = listOf str;
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default = [];
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description = ''
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List of additonal arguments to pass to the daemon.
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'';
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};
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configFile = mkOption {
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type = nullOr path;
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default = null;
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description = ''
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Kea Control Agent configuration as a path, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/agent.html"/>.
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Takes preference over <link linkend="opt-services.kea.ctrl-agent.settings">settings</link>.
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Most users should prefer using <link linkend="opt-services.kea.ctrl-agent.settings">settings</link> instead.
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'';
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};
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settings = mkOption {
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type = format.type;
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default = null;
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description = ''
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Kea Control Agent configuration as an attribute set, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/agent.html"/>.
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'';
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};
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};
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};
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};
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dhcp4 = mkOption {
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description = ''
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DHCP4 Server configuration
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'';
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default = {};
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type = submodule {
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options = {
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enable = mkEnableOption "Kea DHCP4 server";
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extraArgs = mkOption {
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type = listOf str;
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default = [];
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description = ''
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List of additonal arguments to pass to the daemon.
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'';
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};
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configFile = mkOption {
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type = nullOr path;
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default = null;
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description = ''
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Kea DHCP4 configuration as a path, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp4-srv.html"/>.
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Takes preference over <link linkend="opt-services.kea.dhcp4.settings">settings</link>.
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Most users should prefer using <link linkend="opt-services.kea.dhcp4.settings">settings</link> instead.
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'';
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};
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settings = mkOption {
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type = format.type;
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default = null;
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example = {
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valid-lifetime = 4000;
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renew-timer = 1000;
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rebind-timer = 2000;
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interfaces-config = {
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interfaces = [
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"eth0"
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];
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};
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lease-database = {
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type = "memfile";
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persist = true;
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name = "/var/lib/kea/dhcp4.leases";
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};
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subnet4 = [ {
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subnet = "192.0.2.0/24";
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pools = [ {
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pool = "192.0.2.100 - 192.0.2.240";
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} ];
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} ];
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};
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description = ''
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Kea DHCP4 configuration as an attribute set, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp4-srv.html"/>.
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'';
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};
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};
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};
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};
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dhcp6 = mkOption {
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description = ''
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DHCP6 Server configuration
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'';
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default = {};
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type = submodule {
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options = {
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enable = mkEnableOption "Kea DHCP6 server";
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extraArgs = mkOption {
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type = listOf str;
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default = [];
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description = ''
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List of additonal arguments to pass to the daemon.
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'';
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};
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configFile = mkOption {
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type = nullOr path;
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default = null;
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description = ''
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Kea DHCP6 configuration as a path, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp6-srv.html"/>.
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Takes preference over <link linkend="opt-services.kea.dhcp6.settings">settings</link>.
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Most users should prefer using <link linkend="opt-services.kea.dhcp6.settings">settings</link> instead.
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'';
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};
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settings = mkOption {
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type = format.type;
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default = null;
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example = {
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valid-lifetime = 4000;
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renew-timer = 1000;
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rebind-timer = 2000;
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preferred-lifetime = 3000;
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interfaces-config = {
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interfaces = [
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"eth0"
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];
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};
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lease-database = {
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type = "memfile";
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persist = true;
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name = "/var/lib/kea/dhcp6.leases";
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};
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subnet6 = [ {
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subnet = "2001:db8:1::/64";
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pools = [ {
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pool = "2001:db8:1::1-2001:db8:1::ffff";
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} ];
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} ];
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};
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description = ''
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Kea DHCP6 configuration as an attribute set, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp6-srv.html"/>.
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'';
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};
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};
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};
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};
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dhcp-ddns = mkOption {
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description = ''
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Kea DHCP-DDNS configuration
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'';
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default = {};
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type = submodule {
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options = {
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enable = mkEnableOption "Kea DDNS server";
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extraArgs = mkOption {
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type = listOf str;
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default = [];
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description = ''
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List of additonal arguments to pass to the daemon.
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'';
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};
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configFile = mkOption {
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type = nullOr path;
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default = null;
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description = ''
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Kea DHCP-DDNS configuration as a path, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/ddns.html"/>.
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Takes preference over <link linkend="opt-services.kea.dhcp-ddns.settings">settings</link>.
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Most users should prefer using <link linkend="opt-services.kea.dhcp-ddns.settings">settings</link> instead.
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'';
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};
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settings = mkOption {
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type = format.type;
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default = null;
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example = {
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ip-address = "127.0.0.1";
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port = 53001;
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dns-server-timeout = 100;
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ncr-protocol = "UDP";
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ncr-format = "JSON";
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tsig-keys = [ ];
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forward-ddns = {
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ddns-domains = [ ];
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};
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reverse-ddns = {
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ddns-domains = [ ];
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};
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};
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description = ''
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Kea DHCP-DDNS configuration as an attribute set, see <link xlink:href="https://kea.readthedocs.io/en/kea-${package.version}/arm/ddns.html"/>.
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'';
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};
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};
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};
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};
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};
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config = let
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commonServiceConfig = {
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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DynamicUser = true;
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User = "kea";
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ConfigurationDirectory = "kea";
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RuntimeDirectory = "kea";
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StateDirectory = "kea";
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UMask = "0077";
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};
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in mkIf (cfg.ctrl-agent.enable || cfg.dhcp4.enable || cfg.dhcp6.enable || cfg.dhcp-ddns.enable) (mkMerge [
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{
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environment.systemPackages = [ package ];
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}
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(mkIf cfg.ctrl-agent.enable {
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assertions = [{
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assertion = xor (cfg.ctrl-agent.settings == null) (cfg.ctrl-agent.configFile == null);
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message = "Either services.kea.ctrl-agent.settings or services.kea.ctrl-agent.configFile must be set to a non-null value.";
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}];
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environment.etc."kea/ctrl-agent.conf".source = ctrlAgentConfig;
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systemd.services.kea-ctrl-agent = {
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description = "Kea Control Agent";
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documentation = [
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"man:kea-ctrl-agent(8)"
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"https://kea.readthedocs.io/en/kea-${package.version}/arm/agent.html"
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];
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after = [
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"network-online.target"
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"time-sync.target"
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];
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wantedBy = [
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"kea-dhcp4-server.service"
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"kea-dhcp6-server.service"
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"kea-dhcp-ddns-server.service"
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];
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environment = {
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KEA_PIDFILE_DIR = "/run/kea";
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KEA_LOCKFILE_DIR = "/run/kea";
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};
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restartTriggers = [
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ctrlAgentConfig
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];
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serviceConfig = {
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ExecStart = "${package}/bin/kea-ctrl-agent -c /etc/kea/ctrl-agent.conf ${lib.escapeShellArgs cfg.dhcp4.extraArgs}";
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KillMode = "process";
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Restart = "on-failure";
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} // commonServiceConfig;
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};
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})
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(mkIf cfg.dhcp4.enable {
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assertions = [{
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assertion = xor (cfg.dhcp4.settings == null) (cfg.dhcp4.configFile == null);
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message = "Either services.kea.dhcp4.settings or services.kea.dhcp4.configFile must be set to a non-null value.";
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}];
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environment.etc."kea/dhcp4-server.conf".source = dhcp4Config;
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systemd.services.kea-dhcp4-server = {
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description = "Kea DHCP4 Server";
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documentation = [
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"man:kea-dhcp4(8)"
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"https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp4-srv.html"
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];
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after = [
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"network-online.target"
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"time-sync.target"
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];
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wantedBy = [
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"multi-user.target"
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];
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environment = {
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KEA_PIDFILE_DIR = "/run/kea";
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KEA_LOCKFILE_DIR = "/run/kea";
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};
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restartTriggers = [
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dhcp4Config
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];
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serviceConfig = {
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ExecStart = "${package}/bin/kea-dhcp4 -c /etc/kea/dhcp4-server.conf ${lib.escapeShellArgs cfg.dhcp4.extraArgs}";
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# Kea does not request capabilities by itself
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AmbientCapabilities = [
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"CAP_NET_BIND_SERVICE"
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"CAP_NET_RAW"
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];
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CapabilityBoundingSet = [
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"CAP_NET_BIND_SERVICE"
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"CAP_NET_RAW"
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];
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} // commonServiceConfig;
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};
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})
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(mkIf cfg.dhcp6.enable {
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assertions = [{
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assertion = xor (cfg.dhcp6.settings == null) (cfg.dhcp6.configFile == null);
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message = "Either services.kea.dhcp6.settings or services.kea.dhcp6.configFile must be set to a non-null value.";
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}];
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environment.etc."kea/dhcp6-server.conf".source = dhcp6Config;
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systemd.services.kea-dhcp6-server = {
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description = "Kea DHCP6 Server";
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documentation = [
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"man:kea-dhcp6(8)"
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"https://kea.readthedocs.io/en/kea-${package.version}/arm/dhcp6-srv.html"
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];
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after = [
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"network-online.target"
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"time-sync.target"
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];
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wantedBy = [
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"multi-user.target"
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];
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environment = {
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KEA_PIDFILE_DIR = "/run/kea";
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KEA_LOCKFILE_DIR = "/run/kea";
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};
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restartTriggers = [
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dhcp6Config
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];
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serviceConfig = {
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ExecStart = "${package}/bin/kea-dhcp6 -c /etc/kea/dhcp6-server.conf ${lib.escapeShellArgs cfg.dhcp6.extraArgs}";
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# Kea does not request capabilities by itself
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AmbientCapabilities = [
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"CAP_NET_BIND_SERVICE"
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];
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CapabilityBoundingSet = [
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"CAP_NET_BIND_SERVICE"
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];
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} // commonServiceConfig;
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};
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})
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(mkIf cfg.dhcp-ddns.enable {
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assertions = [{
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assertion = xor (cfg.dhcp-ddns.settings == null) (cfg.dhcp-ddns.configFile == null);
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message = "Either services.kea.dhcp-ddns.settings or services.kea.dhcp-ddns.configFile must be set to a non-null value.";
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}];
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environment.etc."kea/dhcp-ddns.conf".source = dhcpDdnsConfig;
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systemd.services.kea-dhcp-ddns-server = {
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description = "Kea DHCP-DDNS Server";
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documentation = [
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"man:kea-dhcp-ddns(8)"
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"https://kea.readthedocs.io/en/kea-${package.version}/arm/ddns.html"
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];
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after = [
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"network-online.target"
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"time-sync.target"
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];
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wantedBy = [
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"multi-user.target"
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];
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environment = {
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KEA_PIDFILE_DIR = "/run/kea";
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KEA_LOCKFILE_DIR = "/run/kea";
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};
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restartTriggers = [
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dhcpDdnsConfig
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];
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serviceConfig = {
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ExecStart = "${package}/bin/kea-dhcp-ddns -c /etc/kea/dhcp-ddns.conf ${lib.escapeShellArgs cfg.dhcp-ddns.extraArgs}";
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AmbientCapabilities = [
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"CAP_NET_BIND_SERVICE"
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];
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CapabilityBoundingSet = [
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"CAP_NET_BIND_SERVICE"
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];
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} // commonServiceConfig;
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};
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})
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]);
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meta.maintainers = with maintainers; [ hexa ];
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# uses attributes of the linked package
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meta.buildDocsInSandbox = false;
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}
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