feat(actualbudget): add NixOS guest

guests/actualbudget.nix

@@ -0,0 +1,23 @@
+args@{ my, ... }:
+# Actual Budget in a NixOS guest, with durable state bind-mounted from the host.
+my.guest {
+  name = "actualbudget";
+  interior = {
+    users.users.actual = {
+      isSystemUser = true;
+      uid = 20001;
+      group = "storage";
+    };
+
+    services.actual = {
+      enable = true;
+      openFirewall = true;
+      user = "actual";
+      group = "storage";
+      settings = {
+        port = 5006;
+        dataDir = "/var/lib/actual";
+      };
+    };
+  };
+} args

hosts/pikachu/default.nix

@@ -20,14 +20,42 @@
 
   systemd.network = {
     enable = true;
-    networks."10-uplink" = {
-      matchConfig.MACAddress = "78:55:36:07:af:49";
-      networkConfig.DHCP = "yes";
-      linkConfig.RequiredForOnline = "routable";
+    netdevs = {
+      "40-br-vlan20".netdevConfig = {
+        Name = "br-vlan20";
+        Kind = "bridge";
+      };
+      "40-vlan20" = {
+        netdevConfig = {
+          Name = "vlan20";
+          Kind = "vlan";
+        };
+        vlanConfig.Id = 20;
+      };
+    };
+
+    networks = {
+      "10-uplink" = {
+        matchConfig.MACAddress = "78:55:36:07:af:49";
+        networkConfig.DHCP = "yes";
+        vlan = [ "vlan20" ];
+        linkConfig.RequiredForOnline = "routable";
+      };
+      "40-vlan20" = {
+        matchConfig.Name = "vlan20";
+        networkConfig.Bridge = "br-vlan20";
+        linkConfig.RequiredForOnline = "no";
+      };
+      "40-br-vlan20" = {
+        matchConfig.Name = "br-vlan20";
+        linkConfig.RequiredForOnline = "no";
+      };
     };
   };
   networking.useDHCP = false;
 
+  modules.network.vlans = [ 20 ];
+
   boot.zfs.forceImportRoot = false;
 
   modules.zfs = {
@@ -43,6 +71,19 @@
   modules.git.enable = true;
   modules.toolkit.enable = true;
 
+  guests.actualbudget = {
+    enable = true;
+    autoStart = false;
+    vlan = 20;
+    mac = "BC:24:11:C1:CD:28";
+    mounts."/var/lib/actual".hostPath = "/pikachu/data/actualbudget";
+    limits = {
+      memory = "2G";
+      cpu = "200%";
+      tasksMax = 512;
+    };
+  };
+
   environment.systemPackages = with pkgs; [
     pciutils
     smartmontools