Custom octodns setup!

modules/nixos/cloudflared.nix

@@ -8,22 +8,44 @@ in
       description = "Cloudflare tunnel id to use for the `satellite.cloudflared.at` helper";
     };
 
+    domain = lib.mkOption {
+      description = "Root domain to use as a default for configurations.";
+      type = lib.types.str;
+      default = config.satellite.dns.domain;
+    };
+
     at = lib.mkOption {
       description = "List of hosts to set up ingress rules for";
       default = { };
-      type = lib.types.attrsOf (lib.types.submodule ({ name, ... }: {
+      type = lib.types.attrsOf (lib.types.submodule ({ name, config, ... }: {
         options = {
+          subdomain = lib.mkOption {
+            description = ''
+              Subdomain to use for host generation. 
+              Only required if `host` is not set manually.
+            '';
+            type = lib.types.str;
+            default = name;
+          };
+
           port = lib.mkOption {
-            type = lib.types.port;
             description = "Localhost port to point the tunnel at";
+            type = lib.types.port;
           };
 
           host = lib.mkOption {
-            default = name;
-            type = lib.types.str;
             description = "Host to direct traffic from";
+            type = lib.types.str;
+            default = "${config.subdomain}.${cfg.domain}";
+          };
+
+          url = lib.mkOption {
+            description = "External https url used to access this host";
+            type = lib.types.str;
           };
         };
+
+        config.url = "https://${config.host}";
       }));
     };
   };
@@ -34,4 +56,13 @@ in
       value = "http://localhost:${toString port}";
     })
     cfg.at;
+
+  config.satellite.dns.records =
+    let mkDnsRecord = { subdomain, ... }: {
+      type = "CNAME";
+      at = subdomain;
+      zone = cfg.domain;
+      value = "${cfg.tunnel}.cfargotunnel.com.";
+    };
+    in lib.attrsets.mapAttrsToList (_: mkDnsRecord) cfg.at;
 }