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nixos/systemd-stage-1: Support systemd-resolved

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This commit is contained in:
Will Fancher 2024-04-07 21:18:59 -04:00
parent dd0ebdffcd
commit 072054ccb5
1 changed files with 51 additions and 13 deletions
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64
nixos/modules/system/boot/resolved.nix
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@ -7,6 +7,20 @@ let
dnsmasqResolve = config.services.dnsmasq.enable &&
config.services.dnsmasq.resolveLocalQueries;
resolvedConf = ''
[Resolve]
${optionalString (config.networking.nameservers != [])
"DNS=${concatStringsSep " " config.networking.nameservers}"}
${optionalString (cfg.fallbackDns != null)
"FallbackDNS=${concatStringsSep " " cfg.fallbackDns}"}
${optionalString (cfg.domains != [])
"Domains=${concatStringsSep " " cfg.domains}"}
LLMNR=${cfg.llmnr}
DNSSEC=${cfg.dnssec}
DNSOverTLS=${cfg.dnsovertls}
${config.services.resolved.extraConfig}
'';
in
{
@ -126,6 +140,15 @@ in
'';
};
boot.initrd.services.resolved.enable = mkOption {
default = config.boot.initrd.systemd.network.enable;
defaultText = "config.boot.initrd.systemd.network.enable";
description = ''
Whether to enable resolved for stage 1 networking.
Uses the toplevel 'services.resolved' options for 'resolved.conf'
'';
};
};
config = mkMerge [
@ -155,19 +178,7 @@ in
};
environment.etc = {
"systemd/resolved.conf".text = ''
[Resolve]
${optionalString (config.networking.nameservers != [])
"DNS=${concatStringsSep " " config.networking.nameservers}"}
${optionalString (cfg.fallbackDns != null)
"FallbackDNS=${concatStringsSep " " cfg.fallbackDns}"}
${optionalString (cfg.domains != [])
"Domains=${concatStringsSep " " cfg.domains}"}
LLMNR=${cfg.llmnr}
DNSSEC=${cfg.dnssec}
DNSOverTLS=${cfg.dnsovertls}
${config.services.resolved.extraConfig}
'';
"systemd/resolved.conf".text = resolvedConf;
# symlink the dynamic stub resolver of resolv.conf as recommended by upstream:
# https://www.freedesktop.org/software/systemd/man/systemd-resolved.html#/etc/resolv.conf
@ -183,6 +194,33 @@ in
})
(mkIf config.boot.initrd.services.resolved.enable {
assertions = [
{
assertion = config.boot.initrd.systemd.enable;
message = "'boot.initrd.services.resolved.enable' can only be enabled with systemd stage 1.";
}
];
boot.initrd.systemd = {
contents = {
"/etc/tmpfiles.d/resolv.conf".text =
"L /etc/resolv.conf - - - - /run/systemd/resolve/stub-resolv.conf";
"/etc/systemd/resolved.conf".text = resolvedConf;
};
additionalUpstreamUnits = ["systemd-resolved.service"];
users.systemd-resolve = {};
groups.systemd-resolve = {};
storePaths = ["${config.boot.initrd.systemd.package}/lib/systemd/systemd-resolved"];
services.systemd-resolved = {
wantedBy = ["sysinit.target"];
aliases = [ "dbus-org.freedesktop.resolve1.service" ];
};
};
})
];
}