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{
inputs,
povSelf,
pkgs,
lib,
config,
dnsNix,
...
}:
let
inherit (lib) types;
cfg = lib.getAttrFromPath povSelf config;
in
{
options = {
enable = {
type = types.bool;
default = false;
};
nameServers = {
type = types.listOf types.str;
};
zone = {
type = types.str;
};
zones = {
type = types.listOf types.str;
};
keyFile = {
type = types.str;
};
};
config = lib.mkIf cfg.enable (
let
generateACMERecord = recordName: ((builtins.hashString "sha1" recordName) + ".${cfg.zone}.");
nodesWithACMERecords = (
inputs.self.zaphyraHosts
|> lib.filterAttrs (hostName: nodeCfg: nodeCfg.config.security.acme.certs != { })
);
getAllDomainsPerNode =
hostName:
(
inputs.self.nixosConfigurations.${hostName}.config.security.acme.certs
|> lib.mapAttrsToList (domain: cfg: [ domain ] ++ cfg.extraDomainNames)
|> lib.flatten
);
getACMERecordsPerNode =
hostName:
(hostName |> getAllDomainsPerNode |> builtins.map (recordName: (generateACMERecord recordName)));
generateACMERecordsPerZone =
zoneName:
(
nodesWithACMERecords
|> lib.mapAttrsToList (hostName: _: (getAllDomainsPerNode hostName))
|> lib.flatten
|> builtins.filter (lib.hasSuffix zoneName)
|> builtins.map (recordName: {
name = "_acme-challenge${
if zoneName != recordName then "." else ""
}${lib.removeSuffix "${if zoneName != recordName then "." else ""}${zoneName}" recordName}";
value = {
CNAME = [ (generateACMERecord recordName) ];
};
})
|> builtins.listToAttrs
);
in
{
dns.allZones = (
cfg.zones
|> lib.map (
element:
lib.nameValuePair element {
subdomains = generateACMERecordsPerZone element;
}
)
|> lib.listToAttrs
);
systemd.services.knot =
let
acmeZoneFile = pkgs.writeTextFile {
name = "${cfg.zone}.zone";
text = dnsNix.types.zoneToString cfg.zone (
dnsNix.evalZone cfg.zone (
with dnsNix.combinators;
{
NS = cfg.nameServers;
SOA = {
nameServer = lib.elemAt cfg.nameServers 0;
adminEmail = "dns@${cfg.zone}"; # Email address with a real `@`!
serial = 0;
};
}
)
);
};
in
{
reloadTriggers = [
"${config.modules.services.knot.dataDir}/acme.zone"
];
serviceConfig = {
ExecStartPre = [
(pkgs.writeShellScript "knot-acmeZone-preStart" ''
set -eou pipefail
cp --dereference ${acmeZoneFile} ${config.modules.services.knot.dataDir}/acme.zone
chmod -R 770 ${config.modules.services.knot.dataDir}/acme.zone
'')
];
ExecReload = lib.mkForce (
pkgs.writeShellScript "knot-reload" ''
set -eou pipefail
cp --dereference ${acmeZoneFile} ${config.modules.services.knot.dataDir}/acme.zone
chmod -R 770 ${config.modules.services.knot.dataDir}/acme.zone
${config.services.knot.package}/bin/knotc reload
''
);
};
};
modules.services.knot = {
keyFiles = [ cfg.keyFile ];
zones = {
"${cfg.zone}" = {
file = "${config.modules.services.knot.dataDir}/acme.zone";
zonefile-sync = 0;
zonefile-load = "difference-no-serial";
journal-content = "all";
acl = lib.mkIf ((lib.attrNames nodesWithACMERecords) != [ ]) (
nodesWithACMERecords |> lib.mapAttrsToList (hostName: _: "acme-nix-${hostName}")
);
};
};
extraACL = (
nodesWithACMERecords
|> lib.mapAttrs' (
hostName: _: {
name = "acme-nix-${hostName}";
value = {
key = [ "acme-nix-${hostName}" ];
action = "update";
update-owner = "name";
update-owner-match = "equal";
update-owner-name = getACMERecordsPerNode hostName;
};
}
)
);
};
}
);
}