Modularise config. Add sops-nix for secrets management.

.sops.yaml

@@ -0,0 +1,9 @@
+keys:
+  - &admin_fern age1n9q3cspp4a6qvjv9xaf00e5d5za3d8upz4akj2fh6zt5ly3ahans3vpx5x
+  - &server_firefox-syncserver age1hrvts2jkdclk3f9atjry7chuakt5n9qmlwfwsdlcnmc88ld3ysuqz6ejge
+creation_rules:
+  - path_regex: secrets/[^/]+\.(yaml|json|env|ini)$
+    key_groups:
+    - age:
+      - *admin_fern
+      - *server_firefox-syncserver

configuration/containers/firefox-syncserver.nix

@@ -1,20 +0,0 @@
-{ pkgs, ... }:
-{
-  services.mysql.package = pkgs.mariadb;
-
-  services.firefox-syncserver = {
-    enable = true;
-    secrets = ./firefox-syncserver.env;
-    settings.host = "0.0.0.0";
-    singleNode = {
-      enable = true;
-      hostname = "0.0.0.0";
-      url = "https://fxsync.fern.garden";
-      capacity = 1;
-    };
-  };
-
-  networking.firewall.allowedTCPPorts = [ 5000 ];
-
-  system.stateVersion = "25.05";
-}

configuration/server/common.nix

@@ -0,0 +1,10 @@
+{
+  # Passwordless sudo
+  security.sudo.wheelNeedsPassword = false;
+
+  # Enable all terminfo (for ghostty)
+  environment.enableAllTerminfo = true;
+
+  # Enable SSH server
+  services.openssh.enable = true;
+}

configuration/server/containers/common.nix

@@ -0,0 +1,8 @@
+{ modulesPath, ... }:
+{
+  # Import Proxmox LXC configuration.
+  imports = [
+    (modulesPath + "/virtualisation/proxmox-lxc.nix")
+  ];
+}
+

configuration/server/containers/firefox-syncserver.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, secrets, ... }:
+{
+  # Secrets.
+  sops = {
+    age.sshKeyPaths = [ "/etc/ssh/ssh_host_ed25519_key" ];
+    defaultSopsFile = "${secrets}/sops.yaml";
+    secrets."firefox_syncserver/sync_master_secret" = {};
+  };
+
+  # syncserver-rs service.
+  services.mysql.package = pkgs.mariadb;
+
+  services.firefox-syncserver = {
+    enable = true;
+    secrets = config.sops.secrets."firefox_syncserver/sync_master_secret".path;
+    settings.host = "0.0.0.0";
+    singleNode = {
+      enable = true;
+      hostname = "0.0.0.0";
+      url = "https://fxsync.fern.garden";
+      capacity = 1;
+    };
+  };
+
+  networking.firewall.allowedTCPPorts = [ 5000 ];
+}

configuration/server/containers/technitium.nix

@@ -3,6 +3,4 @@
     enable = true;
     openFirewall = true;
   };
-
-  system.stateVersion = "25.05";
 }

configuration/server/docker.nix

@@ -1,13 +1,4 @@
 {
-  # Configure the bootloader.
-  boot.loader.grub = {
-    enable = true;
-    device = "/dev/sda";
-  };
-  
-  # Enable QEMU guest agent
-  services.qemuGuest.enable = true;
-
   # Define a user account.
   users.users.docker = {
     isNormalUser = true;
@@ -27,17 +18,6 @@
   # Auto login
   services.getty.autologinUser = "docker";
 
-  # Passwordless sudo
-  security.sudo.wheelNeedsPassword = false;
-
-  # Enable all terminfo (for ghostty)
-  environment.enableAllTerminfo = true;
-
-  # Enable SSH server
-  services.openssh.enable = true;
-
   # Enable docker
-  virtualisation.docker = {
+  virtualisation.docker.enable = true;
-    enable = true;
-  };
 }

configuration/server/vm.nix

@@ -0,0 +1,30 @@
+{ lib, modulesPath, ... }:
+{
+  # Import qemu guest configuration.
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  # Load kernel modules.
+  boot.initrd.availableKernelModules = [
+    "ata_piix"
+    "uhci_hcd"
+    "virtio_pci"
+    "virtio_scsi"
+    "sd_mod"
+  ];
+
+  boot.kernelModules = [ "kvm-intel" ];
+
+  # Enable DHCP.
+  networking.useDHCP = lib.mkDefault true;
+
+  # Configure the bootloader.
+  boot.loader.grub = {
+    enable = true;
+    device = "/dev/sda";
+  };
+
+  # Enable QEMU guest agent
+  services.qemuGuest.enable = true;
+}

flake.lock

@@ -176,6 +176,22 @@
         "type": "github"
       }
     },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1744868846,
+        "narHash": "sha256-5RJTdUHDmj12Qsv7XOhuospjAjATNiTMElplWnJE9Hs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ebe4301cbd8f81c4f8d3244b3632338bbeb6d49c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "pre-commit-hooks-nix": {
       "inputs": {
         "flake-compat": [
@@ -208,7 +224,9 @@
         "fluffychat2": "fluffychat2",
         "lanzaboote": "lanzaboote",
         "nixos-hardware": "nixos-hardware",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs_2",
+        "secrets": "secrets",
+        "sops-nix": "sops-nix"
       }
     },
     "rust-overlay": {
@@ -231,6 +249,41 @@
         "repo": "rust-overlay",
         "type": "github"
       }
+    },
+    "secrets": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1751952212,
+        "narHash": "sha256-2W/h9pas2gJrRtrZYzBxXUZ99i6W3xXtfiIxOI19rhs=",
+        "ref": "main",
+        "rev": "11bb31b71e2ef6795c9b0184f9e10e2946071ed8",
+        "revCount": 1,
+        "type": "git",
+        "url": "ssh://git@docker.local:222/fern/secrets"
+      },
+      "original": {
+        "ref": "main",
+        "type": "git",
+        "url": "ssh://git@docker.local:222/fern/secrets"
+      }
+    },
+    "sops-nix": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1751606940,
+        "narHash": "sha256-KrDPXobG7DFKTOteqdSVeL1bMVitDcy7otpVZWDE6MA=",
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "rev": "3633fc4acf03f43b260244d94c71e9e14a2f6e0d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -5,6 +5,11 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05"; # Stable nixpkgs.
     lanzaboote.url = "github:nix-community/lanzaboote"; # Secure boot.
     nixos-hardware.url = "github:NixOS/nixos-hardware"; # Hardware specific config.
+    sops-nix.url = "github:Mic92/sops-nix"; # Secrets management.
+    secrets = {
+      url = "git+ssh://git@docker.local:222/fern/secrets?ref=main";
+      flake = false;
+    }; # Secrets repo.
 
     # Updated packages.
     fluffychat2.url = "github:NixOS/nixpkgs?ref=pull/419632/head"; # FluffyChat 2.0.0
@@ -17,11 +22,13 @@
       nixpkgs,
       lanzaboote,
       nixos-hardware,
+      sops-nix,
       fluffychat2,
       feishin0_17,
       ...
     }:
     {
+      # ThinkPad T480
       nixosConfigurations.muskduck = nixpkgs.lib.nixosSystem rec {
         system = "x86_64-linux";
 
@@ -38,10 +45,13 @@
 
           ./configuration/common.nix
           ./configuration/desktop.nix
-          ./hardware-configuration/muskduck.nix # Include the results of the hardware scan.
+          
+          ./hosts/muskduck.nix # Include the results of the hardware scan.
         ];
       };
 
+      ### Proxmox Guests ###
+
       nixosConfigurations.vm-minecraft = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
 
@@ -49,8 +59,12 @@
           { networking.hostName = "minecraft"; }
 
           ./configuration/common.nix
-          ./configuration/vm.nix
+          
-          ./hardware-configuration/vm-minecraft.nix # Include the results of the hardware scan.
+          ./configuration/server/common.nix
+          ./configuration/server/vm.nix
+          ./configuration/server/docker.nix
+          
+          ./hosts/vm-minecraft.nix # Include the results of the hardware scan.
         ];
       };
 
@@ -61,8 +75,12 @@
           { networking.hostName = "docker"; }
 
           ./configuration/common.nix
-          ./configuration/vm.nix
+          
-          ./hardware-configuration/vm-docker.nix # Include the results of the hardware scan.
+          ./configuration/server/common.nix
+          ./configuration/server/vm.nix
+          ./configuration/server/docker.nix
+
+          ./hosts/vm-docker.nix # Include the results of the hardware scan.
         ];
       };
 
@@ -70,19 +88,35 @@
         system = "x86_64-linux";
 
         modules = [
-          (nixpkgs + "/nixos/modules/virtualisation/proxmox-lxc.nix")
           { networking.hostName = "technitium"; }
-          ./configuration/containers/technitium.nix
+          
+          ./configuration/common.nix
+
+          ./configuration/server/common.nix
+          ./configuration/server/containers/common.nix
+
+          ./configuration/server/containers/technitium.nix
         ];
       };
 
       nixosConfigurations.lxc-firefox-syncserver = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         
+        specialArgs = {
+          secrets = builtins.toString inputs.secrets;
+        };
+
         modules = [
-          (nixpkgs + "/nixos/modules/virtualisation/proxmox-lxc.nix")
+          sops-nix.nixosModules.sops
+          
           { networking.hostName = "firefox-syncserver"; }
-          ./configuration/containers/firefox-syncserver.nix
+          
+          ./configuration/common.nix
+
+          ./configuration/server/common.nix
+          ./configuration/server/containers/common.nix
+
+          ./configuration/server/containers/firefox-syncserver.nix
         ];
       };
     };

hardware-configuration/vm-docker.nix

@@ -1,30 +0,0 @@
-{ lib, modulesPath, ... }:
-
-{
-  imports =
-    [ (modulesPath + "/profiles/qemu-guest.nix")
-    ];
-
-  boot.initrd.availableKernelModules = [ "ata_piix" "uhci_hcd" "virtio_pci" "virtio_scsi" "sd_mod" "sr_mod" ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" =
-    { device = "/dev/disk/by-uuid/cac60222-9b38-4938-8b17-5fddd67e8e26";
-      fsType = "ext4";
-    };
-
-  fileSystems."/home/docker/volumes" =
-    { device = "/dev/disk/by-uuid/95461a94-ad91-43b9-b502-2b5d4496b84e";
-      fsType = "ext4";
-    };
-
-  swapDevices =
-    [ { device = "/dev/disk/by-uuid/025beadb-a89b-4abe-8d0c-b55401316319"; }
-    ];
-
-  networking.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-}

hardware-configuration/vm-minecraft.nix

@@ -1,36 +0,0 @@
-{ lib, modulesPath, ... }:
-
-{
-  imports = [
-    (modulesPath + "/profiles/qemu-guest.nix")
-  ];
-
-  boot.initrd.availableKernelModules = [
-    "ata_piix"
-    "uhci_hcd"
-    "virtio_pci"
-    "virtio_scsi"
-    "sd_mod"
-  ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
-  boot.extraModulePackages = [ ];
-
-  fileSystems."/" = {
-    device = "/dev/disk/by-uuid/cbd70e61-fcdc-4b1f-af03-d3da8a2866ea";
-    fsType = "ext4";
-  };
-
-  fileSystems."/home/docker/volumes" = {
-    device = "/dev/disk/by-uuid/3730e48a-8784-4c49-8692-473c9b4bc8c3";
-    fsType = "ext4";
-  };
-
-  swapDevices = [
-    { device = "/dev/disk/by-uuid/3123f58e-63a9-44fa-ac29-3e79dc520b8f"; }
-  ];
-
-  networking.useDHCP = lib.mkDefault true;
-
-  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
-}

hosts/vm-docker.nix

@@ -0,0 +1,15 @@
+{
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/cac60222-9b38-4938-8b17-5fddd67e8e26";
+    fsType = "ext4";
+  };
+
+  fileSystems."/home/docker/volumes" = {
+    device = "/dev/disk/by-uuid/95461a94-ad91-43b9-b502-2b5d4496b84e";
+    fsType = "ext4";
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-uuid/025beadb-a89b-4abe-8d0c-b55401316319"; }
+  ];
+}

hosts/vm-minecraft.nix

@@ -0,0 +1,15 @@
+{
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/cbd70e61-fcdc-4b1f-af03-d3da8a2866ea";
+    fsType = "ext4";
+  };
+
+  fileSystems."/home/docker/volumes" = {
+    device = "/dev/disk/by-uuid/3730e48a-8784-4c49-8692-473c9b4bc8c3";
+    fsType = "ext4";
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-uuid/3123f58e-63a9-44fa-ac29-3e79dc520b8f"; }
+  ];
+}