feat(dns,nginx): add some weird magic

lib/default.nix

@@ -36,17 +36,11 @@ rec {
 
   mkVPNSubdomain = name: port: {
     luj.nginx.enable = true;
-    security.acme.certs."${name}.luj".server = "https://ca.luj/acme/acme/directory";
     services.nginx.virtualHosts."${name}.luj" = {
       forceSSL = true;
       enableACME = true;
       locations."/" = {
         proxyPass = "http://localhost:${toString port}";
-        extraConfig = ''
-          allow 100.100.45.0/24;
-          allow fd7a:115c:a1e0::/48;
-          deny all;
-        '';
       };
     };
   };

lib/dns.nix

@@ -4,6 +4,16 @@ with lib;
 
 rec {
 
+  allowedDomains = [
+    "luj.fr"
+    "julienmalka.me"
+    "malka.family"
+    "luj"
+    "malka.sh"
+  ];
+
+  isVPNDomain = hasSuffix "luj";
+
   hasSuffix' = flip strings.hasSuffix;
 
   domainToZone = allowedDomains: domain: (findFirst (hasSuffix' domain) null allowedDomains);

modules/dns/default.nix

@@ -1,20 +1,9 @@
 {
   lib,
-  config,
   dnsLib,
   ...
 }:
 let
-  cfg = config.machine.meta;
-  allowedDomains = [
-    "luj.fr"
-    "julienmalka.me"
-    "malka.family"
-    "luj"
-    "malka.sh"
-  ];
-
-  isVPNDomain = domain: lib.dns.domainToZone [ "luj" ] domain != null;
   SOA = {
     nameServer = "ns";
     adminEmail = "dns@malka.sh";
@@ -57,27 +46,4 @@ with lib;
     };
   };
 
-  config =
-    let
-      # list of domains that are defined in the current configuration through virtualHosts
-      domains = dns.domainsFromConfiguration allowedDomains config;
-      # AttrSet domain -> { records }
-      recordsPerDomain = map (
-        domain:
-        mapAttrs' (
-          n: v:
-          nameValuePair (dns.domainToZone allowedDomains n) (
-            let
-              subdomain = dns.getDomainPrefix allowedDomains n;
-            in
-            if elem subdomain allowedDomains then v else { subdomains."${subdomain}" = v; }
-          )
-        ) (dns.domainToRecords domain cfg (isVPNDomain domain))
-      ) domains;
-    in
-
-    {
-      machine.meta.zones = mkMerge recordsPerDomain;
-    };
-
 }

modules/homepage/default.nix

@@ -1,4 +1,9 @@
-{ lib, inputs, config, ... }:
+{
+  lib,
+  inputs,
+  config,
+  ...
+}:
 with lib;
 let
   cfg = config.luj.homepage;
@@ -8,21 +13,12 @@ in
     enable = mkEnableOption "enable homepage";
   };
 
-  config = mkIf cfg.enable
-    {
-      luj.nginx.enable = true;
-      services.nginx.virtualHosts."julienmalka.me" = {
-        enableACME = true;
-        forceSSL = true;
-        root = inputs.homepage;
-      };
-
-      services.nginx.virtualHosts."www.julienmalka.me" = {
-        enableACME = true;
-        forceSSL = true;
-        root = inputs.homepage;
-      };
-
-
+  config = mkIf cfg.enable {
+    luj.nginx.enable = true;
+    services.nginx.virtualHosts."julienmalka.me" = {
+      enableACME = true;
+      forceSSL = true;
+      root = inputs.homepage;
     };
+  };
 }

modules/nginx/default.nix

@@ -1,15 +1,74 @@
-{ lib, config, ... }:
+systemArgs@{ lib, config, ... }:
 with lib;
 let
   cfg = config.luj.nginx;
+  mergeSub =
+    f:
+    lib.mkMerge (
+      map (sub: f (sub.systemConfig systemArgs)) (lib.attrValues config.services.nginx.virtualHosts)
+    );
+
+  recordsFromDomain =
+    domain:
+    mapAttrs' (
+      n: v:
+      nameValuePair (dns.domainToZone dns.allowedDomains n) (
+        let
+          subdomain = dns.getDomainPrefix dns.allowedDomains n;
+        in
+        if elem subdomain dns.allowedDomains then v else { subdomains."${subdomain}" = v; }
+      )
+    ) (dns.domainToRecords domain config.machine.meta (dns.isVPNDomain domain));
+
 in
 {
 
-  options.luj.nginx = {
-    enable = mkEnableOption "activate nginx service";
-    email = mkOption {
-      type = types.str;
-      default = "julien@malka.sh";
+  options = {
+    luj.nginx = {
+      enable = mkEnableOption "activate nginx service";
+      email = mkOption {
+        type = types.str;
+        default = "julien@malka.sh";
+      };
+    };
+
+    # Awesome NixOS crimes
+    services.nginx.virtualHosts = lib.mkOption {
+      type = lib.types.attrsOf (
+        lib.types.submodule (
+          {
+            name,
+            ...
+          }:
+          {
+            options = {
+              systemConfig = lib.mkOption {
+                internal = true;
+                type = types.unspecified; # A function from module arguments to config.
+              };
+            };
+            config = {
+              locations."/".extraConfig = lib.mkIf (lib.hasSuffix "luj" name) ''
+                allow 100.100.45.0/24;
+                allow fd7a:115c:a1e0::/48;
+                deny all;
+              '';
+              extraConfig = ''
+                ssl_stapling off;
+              '';
+
+              systemConfig = _: {
+                security.acme.certs = lib.optionalAttrs (hasSuffix "luj" name) {
+                  "${name}".server = lib.mkIf (hasSuffix "luj" name) "https://ca.luj/acme/acme/directory";
+                };
+
+                machine.meta.zones = lib.optionalAttrs (name != "default") (recordsFromDomain name);
+
+              };
+            };
+          }
+        )
+      );
     };
   };
 
@@ -19,8 +78,7 @@ in
       80
       443
     ];
-    security.acme.defaults.email = "${cfg.email}";
-    security.acme.acceptTerms = true;
+
     users.groups.nginx = {
       name = "nginx";
     };
@@ -35,16 +93,45 @@ in
       commonHttpConfig = ''
         server_names_hash_bucket_size 128;
       '';
-    };
-
-    services.nginx.virtualHosts."404.julienmalka.me" = {
-      default = true;
-      locations."/" = {
-        root = "${./404}";
+      virtualHosts.default = {
+        default = true;
+        addSSL = true;
+        enableACME = false;
+        sslCertificate = "/var/lib/acme/default/cert.pem";
+        sslCertificateKey = "/var/lib/acme/default/key.pem";
+        extraConfig = ''
+          return 444;
+        '';
       };
     };
 
-    machine.meta.zones."julienmalka.me".subdomains."404" = lib.mkForce { };
+    security.acme.certs = mergeSub (c: c.security.acme.certs);
+    security.acme.defaults.email = "${cfg.email}";
+    security.acme.acceptTerms = true;
+
+    age.secrets.nginx-cert = {
+      file = ../../secrets/404-ssl-certificate-cert.age;
+      path = "/var/lib/acme/default/cert.pem";
+      owner = "acme";
+      group = "nginx";
+      mode = "0640";
+      symlink = false;
+    };
+
+    age.secrets.nginx-key = {
+      file = ../../secrets/404-ssl-certificate-key.age;
+      path = "/var/lib/acme/default/key.pem";
+      owner = "acme";
+      group = "nginx";
+      mode = "0640";
+      symlink = false;
+    };
+
+    systemd.tmpfiles.rules = [
+      "d /var/lib/acme/default 0750 acme nginx - -"
+    ];
+
+    machine = mergeSub (c: c.machine);
 
   };
 }

secrets/secrets.nix

@@ -94,4 +94,6 @@ in
     gustave
     tower
   ];
+  "404-ssl-certificate-cert.age".publicKeys = all;
+  "404-ssl-certificate-key.age".publicKeys = all;
 }