topology: init

flake.nix

@@ -21,6 +21,9 @@
 
     # Attic
     attic.url = "github:zhaofengli/attic";
+
+    # Nix-Topology
+    nix-topology.url = "github:oddlama/nix-topology";
   };
 
   outputs =
@@ -31,6 +34,7 @@
     , flake-utils
     , colmena
     , attic
+    , nix-topology
     , ...
     } @ inputs:
     let
@@ -69,6 +73,7 @@
           modules = [
             ./nodes/mns
             self.nixosModules.common
+            nix-topology.nixosModules.default
           ];
         };
         monitoring = nixpkgs.lib.nixosSystem {
@@ -78,6 +83,7 @@
           modules = [
             ./nodes/monitoring
             self.nixosModules.common
+            nix-topology.nixosModules.default
           ];
         };
         sync = nixpkgs.lib.nixosSystem {
@@ -87,6 +93,7 @@
           modules = [
             ./nodes/sync
             self.nixosModules.common
+            nix-topology.nixosModules.default
           ];
         };
         cache = nixpkgs.lib.nixosSystem {
@@ -96,6 +103,7 @@
           modules = [
             ./nodes/cache
             self.nixosModules.common
+            nix-topology.nixosModules.default
           ];
         };
       };
@@ -105,5 +113,21 @@
       };
 
       formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
-    };
+    } // flake-utils.lib.eachDefaultSystem (system: rec {
+      pkgs = import nixpkgs {
+        inherit system;
+        overlays = [ nix-topology.overlays.default ];
+      };
+
+      topology = import nix-topology {
+        inherit pkgs;
+        modules = [
+          # Your own file to define global topology. Works in principle like a nixos module but uses different options.
+          # ./topology.nix
+          # Inline module to inform topology of your existing NixOS hosts.
+          ./topology.nix
+          { inherit (self) nixosConfigurations; }
+        ];
+      };
+    });
 }

modules/common/tailscale.nix

@@ -3,6 +3,8 @@
 , ...
 }:
 {
+  topology.self.interfaces.tailscale0.network = "tailnet";
+
   sops.secrets."tailscale/authkey" = {
     sopsFile = "${inputs.self}/secrets/common.yaml";
   };

nodes/cache/attic.nix

@@ -27,10 +27,10 @@
         listen = "127.0.0.1:8080";
 
         storage = {
-        type = "s3";
-        endpoint = "https://s3.wasabisys.com";
-        region = "eu-central-2";
-        bucket = "cache-xnee-net";
+          type = "s3";
+          endpoint = "https://s3.wasabisys.com";
+          region = "eu-central-2";
+          bucket = "cache-xnee-net";
         };
 
         # Data chunking

nodes/cache/networking.nix

@@ -1,7 +1,15 @@
 { lib
+, config
 , ...
 }:
+let
+  inherit (config.lib.topology) mkConnectionRev;
+in
 {
+  topology.self.interfaces.eth0 = {
+    network = "Internet";
+    physicalConnections = [ (mkConnectionRev "Internet" "*") ];
+  };
   networking = {
     useNetworkd = true;
     useDHCP = false;