refactor flake

flake.nix

@@ -31,73 +31,30 @@
     let
       inherit (nixpkgs) lib;
       inherit (builtins) filter mapAttrs attrValues concatLists;
+
+      util = import ./util.nix inputs;
+
       system = "x86_64-linux";
-      # import and add location qualifier to all hosts
-      hosts = mapAttrs (location: lhosts: map ({ tags ? [ ], ... }@x: x // { tags = [ location ] ++ tags; inherit location; }) lhosts) (import ./nixos/hosts);
+      # import and add realm to list of tags
+      hosts = mapAttrs util.add_realm_to_tags (import ./nixos/hosts);
       # flatten hosts to single list
-      flat_hosts = concatLists (attrValues hosts);
-      # Filter all nixos host definitions that are actual nix machines
-      nixHosts = filter ({ nix ? true, ... }: nix) flat_hosts;
+      flat_hosts = util.flatten_hosts hosts;
+      # Filter out all non-nixos hosts
+      nixHosts = util.filter_nix_hosts flat_hosts;
+
       # Define args each module gets access to (access to hosts is useful for DNS/DHCP)
       specialArgs = { inherit hosts flat_hosts inputs; };
-
-      # Resolve imports based on a foldername (nixname) and if the host is an LXC container or a VM.
-      resolveImports = { hostname, location, profile ? hostname, lxc ? true, ... }: [
-        ./nixos/common
-        "${./.}/nixos/hosts/${location}/${profile}/configuration.nix"
-      ] ++ (if lxc then [
-        "${nixpkgs}/nixos/modules/virtualisation/lxc-container.nix"
-        ./nixos/common/generic-lxc.nix
-      ]
-      else [ ./nixos/common/generic-vm.nix ]);
-
-      mkConfig = { hostname, location, ... }@host: {
-        "${hostname}.${location}" = lib.nixosSystem {
-          inherit system specialArgs;
-          modules = resolveImports host;
-        };
-      };
-
-      mkColmenaHost = { ip, hostname, tags, location, ... }@host: {
-        "${hostname}.${location}" = {
-          imports = resolveImports host;
-          networking = {
-            hostName = hostname;
-            domain = location;
-          };
-          deployment = {
-            inherit tags;
-            targetHost = ip;
-            targetUser = null; # Defaults to $USER
-          };
-        };
-      };
-
       pkgs = serokell-nix.lib.pkgsWith nixpkgs.legacyPackages.${system} [ vault-secrets.overlay ];
     in
     {
       # Make the nixosConfigurations, mostly for vault-secrets
-      nixosConfigurations = lib.foldr (el: acc: acc // mkConfig el) { } nixHosts;
+      nixosConfigurations = util.mkNixosConfigurations specialArgs hosts;
 
       # Make the coleman configuration
-      colmena = lib.foldr (el: acc: acc // mkColmenaHost el)
+      colmena = lib.foldr (el: acc: acc // util.mkColmenaHost el)
         {
-          null = { ... }: {
-            networking.hostName = "null";
-
-            imports = [
-              ./nixos/common
-              ./nixos/hosts/thalassa/null/configuration.nix
-              home-manager.nixosModules.home-manager
-            ];
-
-            deployment = {
-              allowLocalDeployment = true;
-              targetHost = null;
-            };
-          };
-
           meta = {
+            inherit specialArgs;
             nixpkgs = import nixpkgs {
               inherit system;
               overlays = [
@@ -105,7 +62,6 @@
                 minecraft-servers.overlays.default
               ];
             };
-            inherit specialArgs;
           };
         }
         nixHosts;

nixos/hosts/default.nix

@@ -1,4 +1,5 @@
 {
   hades = import ./hades;
   olympus = import ./olympus;
+  thalassa = import ./thalassa;
 }

nixos/hosts/olympus/default.nix

@@ -22,7 +22,7 @@
     ip = "10.42.42.4";
     ip6 = "2001:41f0:9639:1:80f0:7cff:fecb:bd6d";
     mac = "82:F0:7C:CB:BD:6D";
-    lxc = false;
+    type = "vm";
   }
   {
     hostname = "vault";
@@ -53,7 +53,7 @@
     profile = "k3s";
     ip = "10.42.42.10";
     mac = "2E:F8:55:23:D9:9B";
-    lxc = false;
+    type = "vm";
   }
   {
     hostname = "WoolooTV";

nixos/hosts/olympus/dhcp/configuration.nix

@@ -6,7 +6,7 @@ let
     ipAddress = ip;
   };
   localDomain = config.networking.domain;
-  hosts' = hosts.${localDomain};
+  hosts' = builtins.filter (builtins.hasAttr "ip") hosts.${localDomain};
 in {
   imports = [ ];
 

nixos/hosts/olympus/dns/configuration.nix

@@ -1,15 +1,14 @@
 { config, pkgs, hosts, flat_hosts, ... }:
 let
   inherit (builtins) filter hasAttr attrNames;
-  hosts' = flat_hosts;
   domains = attrNames hosts;
+  ipv4Host = filter (hasAttr "ip") flat_hosts;
+  ipv6Hosts = filter (hasAttr "ip6") flat_hosts;
 
-  ipv6Hosts = filter (hasAttr "ip6") hosts';
-
-  localData = { hostname, location, ip, ... }: ''"${hostname}.${location}. A ${ip}"'';
-  local6Data = { hostname, location, ip6, ... }: ''"${hostname}.${location}. AAAA ${ip6}"'';
-  ptrData = { hostname, location, ip, ... }: ''"${ip} ${hostname}.${location}"'';
-  ptr6Data = { hostname, location, ip6, ... }: ''"${ip6} ${hostname}.${location}"'';
+  localData = { hostname, realm, ip, ... }: ''"${hostname}.${realm}. A ${ip}"'';
+  local6Data = { hostname, realm, ip6, ... }: ''"${hostname}.${realm}. AAAA ${ip6}"'';
+  ptrData = { hostname, realm, ip, ... }: ''"${ip} ${hostname}.${realm}"'';
+  ptr6Data = { hostname, realm, ip6, ... }: ''"${ip6} ${hostname}.${realm}"'';
 in {
   imports = [ ];
 
@@ -38,8 +37,8 @@ in {
         interface = [ "0.0.0.0" "::0" ];
 
         local-zone = map (localdomain: ''"${localdomain}}." transparent'') domains;
-        local-data = (map localData hosts') ++ (map local6Data ipv6Hosts);
-        local-data-ptr = (map ptrData hosts') ++ (map ptr6Data ipv6Hosts);
+        local-data = (map localData ipv4Host) ++ (map local6Data ipv6Hosts);
+        local-data-ptr = (map ptrData ipv4Host) ++ (map ptr6Data ipv6Hosts);
 
         access-control = [
           "127.0.0.1/32 allow_snoop"

nixos/hosts/thalassa/default.nix

@@ -1,7 +1,6 @@
 [
   {
     hostname = "null";
-    mac = "";
     type = "local";
   }
 ]

util.nix

@@ -0,0 +1,51 @@
+{ nixpkgs, home-manager, ... }:
+let
+  inherit (nixpkgs) lib;
+  inherit (builtins) filter mapAttrs attrValues concatLists;
+  import_cases = {
+    "lxc" = [
+      "${nixpkgs}/nixos/modules/virtualisation/lxc-container.nix"
+      ./nixos/common/generic-lxc.nix
+    ];
+    "vm" = [
+      ./nixos/common/generic-vm.nix
+    ];
+    "local" = [
+      home-manager.nixosModules.home-manager
+    ];
+  };
+  resolve_imports = { hostname, realm, profile ? hostname, type ? "lxc", ... }: [
+    ./nixos/common
+    "${./.}/nixos/hosts/${realm}/${profile}/configuration.nix"
+  ] ++ import_cases.${type};
+in
+rec {
+  add_realm_to_tags = realm: hosts: map ({ tags ? [ ], ... }@host: host // { tags = [ realm ] ++ tags; inherit realm; }) hosts;
+  flatten_hosts = hosts: concatLists (attrValues hosts);
+  filter_nix_hosts = hosts: filter ({ nix ? true, ... }: nix) hosts;
+
+  mkNixosSystem = specialArgs: { hostname, realm, system ? "x86_64-linux", ... }@host: {
+    "${hostname}.${realm}" = lib.nixosSystem {
+      inherit system specialArgs;
+      modules = resolve_imports host;
+    };
+  };
+
+  mkColmenaHost = { ip ? null, hostname, tags, realm, type ? "lxc", ... }@host: {
+    "${hostname}.${realm}" = {
+      imports = resolve_imports host;
+      networking = {
+        hostName = hostname;
+        domain = realm;
+      };
+      deployment = {
+        inherit tags;
+        targetHost = ip;
+        allowLocalDeployment = (type == "local");
+        targetUser = null; # Defaults to $USER
+      };
+    };
+  };
+
+  mkNixosConfigurations = specialArgs: hosts: lib.foldr (el: acc: acc // mkNixosSystem specialArgs el) { } hosts;
+}