Update flake.lock

This can be used to start containers declaratively.
Use docker when it is enabled for this.

flake.lock

@@ -1,5 +1,28 @@
 {
   "nodes": {
+    "agenix": {
+      "inputs": {
+        "darwin": [],
+        "home-manager": "home-manager",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1754433428,
+        "narHash": "sha256-NA/FT2hVhKDftbHSwVnoRTFhes62+7dxZbxj5Gxvghs=",
+        "owner": "ryantm",
+        "repo": "agenix",
+        "rev": "9edb1787864c4f59ae5074ad498b6272b3ec308d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "ryantm",
+        "repo": "agenix",
+        "type": "github"
+      }
+    },
     "auto-cpufreq": {
       "inputs": {
         "nixpkgs": [
@@ -7,11 +30,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1748372346,
-        "narHash": "sha256-7y7NZ6uW0GbT0h4gqfD2xvRuJj5IlPGw32oIc9Twga8=",
+        "lastModified": 1758056808,
+        "narHash": "sha256-7I4duKo9OdQ7sldgjoYBlpZ+xykszDj/IVz5hlJOaeg=",
         "owner": "AdnanHodzic",
         "repo": "auto-cpufreq",
-        "rev": "becd5b89963fa54fef3566147f3fd2087f8a5842",
+        "rev": "9f86acc38dca4299b70ea55ae6c52902da5c903c",
         "type": "github"
       },
       "original": {
@@ -20,6 +43,26 @@
         "type": "github"
       }
     },
+    "disko": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757508292,
+        "narHash": "sha256-7lVWL5bC6xBIMWWDal41LlGAG+9u2zUorqo3QCUL4p4=",
+        "owner": "nix-community",
+        "repo": "disko",
+        "rev": "146f45bee02b8bd88812cfce6ffc0f933788875a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "disko",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -36,6 +79,21 @@
         "type": "github"
       }
     },
+    "flake-compat_2": {
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "gitignore": {
       "inputs": {
         "nixpkgs": [
@@ -61,15 +119,36 @@
     "home-manager": {
       "inputs": {
         "nixpkgs": [
+          "agenix",
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1749154018,
-        "narHash": "sha256-gjN3j7joRvT3a8Zgcylnd4NFsnXeDBumqiu4HmY1RIg=",
+        "lastModified": 1745494811,
+        "narHash": "sha256-YZCh2o9Ua1n9uCvrvi5pRxtuVNml8X2a03qIFfRKpFs=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "7aae0ee71a17b19708b93b3ed448a1a0952bf111",
+        "rev": "abfad3d2958c9e6300a883bd443512c55dfeb1be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "home-manager_2": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757808926,
+        "narHash": "sha256-K6PEI5PYY94TVMH0mX3MbZNYFme7oNRKml/85BpRRAo=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "f21d9167782c086a33ad53e2311854a8f13c281e",
         "type": "github"
       },
       "original": {
@@ -87,11 +166,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1746906641,
-        "narHash": "sha256-b6few4tkqN2TWdrZTwWOjsWxA11rle7y9pcc0/ynuoE=",
+        "lastModified": 1752585957,
+        "narHash": "sha256-ogQo/MMNSIM4U4VQMieIrpLhjkgSbev3VR24foJ/h/U=",
         "owner": "~rycee",
         "repo": "lazy-apps",
-        "rev": "0b30a0bf524a661f9657c441d021aaa5724f12ff",
+        "rev": "3c3ce5001e24b6c12496a5920eee28a96f8d49d6",
         "type": "sourcehut"
       },
       "original": {
@@ -102,11 +181,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1749195551,
-        "narHash": "sha256-W5GKQHgunda/OP9sbKENBZhMBDNu2QahoIPwnsF6CeM=",
+        "lastModified": 1757943327,
+        "narHash": "sha256-w6cDExPBqbq7fTLo4dZ1ozDGeq3yV6dSN4n/sAaS6OM=",
         "owner": "NixOS",
         "repo": "nixos-hardware",
-        "rev": "4602f7e1d3f197b3cb540d5accf5669121629628",
+        "rev": "67a709cfe5d0643dafd798b0b613ed579de8be05",
         "type": "github"
       },
       "original": {
@@ -118,11 +197,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1749086602,
-        "narHash": "sha256-DJcgJMekoxVesl9kKjfLPix2Nbr42i7cpEHJiTnBUwU=",
+        "lastModified": 1758070117,
+        "narHash": "sha256-uLwwHFCZnT1c3N3biVe/0hCkag2GSrf9+M56+Okf+WY=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4792576cb003c994bd7cc1edada3129def20b27d",
+        "rev": "e9b7f2ff62b35f711568b1f0866243c7c302028d",
         "type": "github"
       },
       "original": {
@@ -148,6 +227,36 @@
         "type": "github"
       }
     },
+    "nixpkgs-stable_2": {
+      "locked": {
+        "lastModified": 1748437600,
+        "narHash": "sha256-hYKMs3ilp09anGO7xzfGs3JqEgUqFMnZ8GMAqI6/k04=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7282cb574e0607e65224d33be8241eae7cfe0979",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-25.05",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1723637854,
+        "narHash": "sha256-med8+5DSWa2UnOqtdICndjDAEjxr5D7zaIiK4pn0Q7c=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c3aa7b8938b17aebd2deecf7be0636000d62a2b9",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
     "pre-commit-hooks": {
       "inputs": {
         "flake-compat": "flake-compat",
@@ -172,17 +281,88 @@
         "type": "github"
       }
     },
+    "proxmox-nixos": {
+      "inputs": {
+        "flake-compat": "flake-compat_2",
+        "nixpkgs-stable": "nixpkgs-stable_2",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "utils": "utils"
+      },
+      "locked": {
+        "lastModified": 1754428470,
+        "narHash": "sha256-Sxf8gf+vfGeFaJMW3D+8pwH/+WwYTQOg47Lrm42+kTc=",
+        "owner": "SaumonNet",
+        "repo": "proxmox-nixos",
+        "rev": "6faed2845ef5f0bb05c9519b75097bbe7fb39327",
+        "type": "github"
+      },
+      "original": {
+        "owner": "SaumonNet",
+        "repo": "proxmox-nixos",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
+        "agenix": "agenix",
         "auto-cpufreq": "auto-cpufreq",
-        "home-manager": "home-manager",
+        "disko": "disko",
+        "home-manager": "home-manager_2",
         "lazy-apps": "lazy-apps",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",
-        "systems": "systems"
+        "proxmox-nixos": "proxmox-nixos",
+        "secrets": "secrets",
+        "systems": "systems_3"
+      }
+    },
+    "secrets": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1758149260,
+        "narHash": "sha256-Pgw5Krmc27t+7On6fwHJWx0nuoLRu0XqwN5MHaZ5kys=",
+        "ref": "refs/heads/main",
+        "rev": "50fd7d5277505cbb3235aae9719d3b8b0c7fe692",
+        "revCount": 5,
+        "type": "git",
+        "url": "ssh://git@git.jfreudenberger.de/JuliusFreudenberger/nix-private.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "ssh://git@git.jfreudenberger.de/JuliusFreudenberger/nix-private.git"
       }
     },
     "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_3": {
       "locked": {
         "lastModified": 1689347949,
         "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
@@ -196,6 +376,24 @@
         "repo": "default-linux",
         "type": "github"
       }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -17,7 +17,22 @@
       url = "sourcehut:~rycee/lazy-apps";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-
+    proxmox-nixos.url = "github:SaumonNet/proxmox-nixos";
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    agenix = {
+      url = "github:ryantm/agenix";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        darwin.follows = "";
+      };
+    };
+    secrets = {
+      url = "git+ssh://git@git.jfreudenberger.de/JuliusFreudenberger/nix-private.git";
+      flake = false;
+    };
     systems.url = "github:nix-systems/default-linux";
   };
 
@@ -28,6 +43,9 @@
     nixos-hardware,
     home-manager,
     auto-cpufreq,
+    proxmox-nixos,
+    agenix,
+    disko,
     systems,
     ...
   } @ inputs: let
@@ -90,6 +108,79 @@
           ./hosts/backup-raspberrypi
         ];
       };
+
+      server = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          ./hosts/nixos-server-test
+          proxmox-nixos.nixosModules.proxmox-ve
+
+          ({...}: {
+            nixpkgs.overlays = [
+              proxmox-nixos.overlays.${system}
+            ];
+          })
+        ];
+      };
+
+      srv01-hf = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          disko.nixosModules.disko
+          agenix.nixosModules.default
+          ./hosts/srv01.hf
+        ];
+      };
+
+      kube01 = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          disko.nixosModules.disko
+          ./hosts/kube01
+        ];
+      };
+
+      kube02 = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          disko.nixosModules.disko
+          ./hosts/kube02
+        ];
+      };
+
+      kube03 = nixpkgs.lib.nixosSystem rec {
+        system = "x86_64-linux";
+
+        specialArgs = {
+          inherit inputs outputs;
+        };
+
+        modules = [
+          disko.nixosModules.disko
+          ./hosts/kube03
+        ];
+      };
+
     };
   };
 }

hosts/kube01/default.nix

@@ -0,0 +1,41 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/disko/efi-full-btrfs.nix
+      ../../modules/systemd-boot.nix
+
+      ../../users/julius/nixos-server.nix
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/sshd.nix
+      ../../modules/k3s.nix
+      ../../modules/qemu-guest.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+
+  networking.hostName = "kube01"; # Define your hostname.
+
+  services.k3s = {
+    clusterInit = true;
+  };
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/kube01/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/kube02/default.nix

@@ -0,0 +1,41 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/disko/efi-full-btrfs.nix
+      ../../modules/systemd-boot.nix
+
+      ../../users/julius/nixos-server.nix
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/sshd.nix
+      ../../modules/k3s.nix
+      ../../modules/qemu-guest.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  networking.hostName = "kube02"; # Define your hostname.
+
+  services.k3s = {
+    serverAddr = "https://kube01:6443";
+    clusterInit = false;
+  };
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/kube02/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/kube03/default.nix

@@ -0,0 +1,42 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/disko/efi-full-btrfs.nix
+      ../../modules/systemd-boot.nix
+
+      ../../users/julius/nixos-server.nix
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/sshd.nix
+      ../../modules/k3s.nix
+      ../../modules/qemu-guest.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+
+  networking.hostName = "kube03"; # Define your hostname.
+
+  services.k3s = {
+    serverAddr = "https://kube01:6443";
+    clusterInit = false;
+  };
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/kube03/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/nixos-server-test/default.nix

@@ -0,0 +1,96 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/nix.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/sshd.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+  # Use the GRUB 2 boot loader.
+  boot = {
+    loader.grub = {
+      enable = true;
+      device = "/dev/vda";
+    };
+    tmp.useTmpfs = true;
+  };
+  networking.hostName = "nixos-server"; # Define your hostname.
+  users = {
+    users = {
+      julius = {
+        isNormalUser = true;
+        uid = 1000;
+        extraGroups = [ "wheel" "julius" ];
+      };
+    };
+    groups = {
+      julius = {
+        gid = 1000;
+      };
+    };
+  };
+
+  nix.settings = {
+    substituters = [
+      "https://cache.saumon.network/proxmox-nixos"
+    ];
+    trusted-public-keys = [
+      "proxmox-nixos:D9RYSWpQQC/msZUWphOY2I5RLH5Dd6yQcaHIuug7dWM="
+    ];
+  };
+
+  services.proxmox-ve = {
+    enable = true;
+    ipAddress = "192.168.122.71";
+
+    # Make vmbr0 bridge visible in Proxmox web interface
+    bridges = [ "vmbr0" ];
+  };
+
+  networking.useDHCP = false;
+
+  systemd.network = {
+    enable = true;
+
+    networks."10-lan" = {
+      matchConfig.Name = [ "enp1s0" ];
+      networkConfig = {
+        Bridge = "vmbr0";
+      };
+    };
+
+    netdevs."vmbr0" = {
+      netdevConfig = {
+        Name = "vmbr0";
+        Kind = "bridge";
+      };
+    };
+
+    networks."10-lan-bridge" = {
+      matchConfig.Name = "vmbr0";
+      networkConfig = {
+        IPv6AcceptRA = true;
+        DHCP = "ipv4";
+      };
+      linkConfig.RequiredForOnline = "routable";
+    };
+  };
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/nixos-server-test/hardware-configuration.nix

@@ -0,0 +1,31 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/e46c412a-8b6d-41b8-b53c-65d7a8fc39ed";
+      fsType = "ext4";
+    };
+
+  swapDevices = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/srv01.hf/default.nix

@@ -0,0 +1,71 @@
+{ inputs, outputs, config, lib, pkgs, ... }:
+
+{
+  imports =
+    [
+      ../../modules/disko/efi-full-btrfs.nix
+      ./secrets.nix
+
+      ../../users/julius/nixos-server.nix
+      ../../users/nixremote.nix
+      ../../modules/nix.nix
+      ../../modules/network-server.nix
+      ../../modules/locale.nix
+      ../../modules/server-cli.nix
+      ../../modules/sshd.nix
+      ../../modules/qemu-guest.nix
+      ../../modules/docker.nix
+      ../../modules/teleport.nix
+      ../../modules/portainer_agent.nix
+      ../../modules/auto-upgrade.nix
+      # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ];
+
+  services.openssh.openFirewall = false;
+  services.teleport = {
+    enable = true;
+    settings.teleport = {
+      ca_pin = config.age.secrets."teleport-ca_pin".path;
+      auth_token = config.age.secrets."teleport-join_token".path;
+    };
+  };
+
+  virtualisation.oci-containers.containers.portainer_agent.environmentFiles = [ config.age.secrets."portainer-join_token".path ];
+
+  systemd.network = {
+    enable = true;
+      networks."10-wan" = {
+      matchConfig.Name = "ens18";
+      networkConfig.DHCP = "no";
+      address = [
+        "77.90.17.93/24"
+        "2a06:de00:100:63::2/64"
+      ];
+      routes = [
+        { Gateway = "77.90.17.1"; }
+        { Gateway = "2a06:de00:100::1"; GatewayOnLink = true; }
+      ];
+      dns = [ "9.9.9.9" ];
+    };
+  };
+
+  # Disable classic networking configuration
+  networking.useDHCP = lib.mkForce false;
+
+  networking.hostName = "srv01-hf"; # Define your hostname.
+
+  # This option defines the first version of NixOS you have installed on this particular machine,
+  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
+  # Most users should NEVER change this value after the initial install, for any reason,
+  # even if you've upgraded your system to a new NixOS release.
+  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
+  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
+  # to actually do that.
+  # This value being lower than the current NixOS release does NOT mean your system is
+  # out of date, out of support, or vulnerable.
+  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
+  # and migrated your data accordingly.
+  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
+  system.stateVersion = "25.05"; # Did you read the comment?
+}

hosts/srv01.hf/hardware-configuration.nix

@@ -0,0 +1,24 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/profiles/qemu-guest.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "uhci_hcd" "ehci_pci" "ahci" "sr_mod" ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+
+  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
+  # (the default) this is the recommended approach. When using systemd-networkd it's
+  # still possible to use this option, but it's recommended to use it in conjunction
+  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/srv01.hf/secrets.nix

@@ -0,0 +1,8 @@
+{ inputs, ... }:
+{
+  age.secrets = {
+    teleport-ca_pin.file = "${inputs.secrets}/secrets/teleport/ca_pin";
+    teleport-join_token.file = "${inputs.secrets}/secrets/srv01-hf/teleport_auth_token";
+    portainer-join_token.file = "${inputs.secrets}/secrets/srv01-hf/portainer_join_token";
+  };
+}

modules/auto-upgrade.nix

@@ -0,0 +1,37 @@
+{
+  inputs,
+  pkgs,
+  ...
+}: {
+  system.autoUpgrade = {
+    enable = true;
+    flags = [
+      "--recreate-lock-file" # Deprecated, but will hopefully be reintroduced
+      "-L"
+    ];
+    flake = inputs.self.outPath;
+    dates = "02:00";
+    randomizedDelaySec = "45min";
+    allowReboot = true;
+    rebootWindow = {
+      lower = "01:00";
+      upper = "05:00";
+    };
+  };
+
+  # Also needs access to the nix-private repo which contains the encrypted secrets
+  programs.ssh = {
+    extraConfig = "
+      Host git.jfreudenberger.de
+        Port 222
+        User git
+        IdentityFile /etc/ssh/ssh_host_ed25519_key
+    ";
+    knownHostsFiles = [
+      (pkgs.writeText "forgejo.keys" ''[git.jfreudenberger.de]:222 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK+uqIeb9+AoqwD0Z6xLKI2dsRoS9Qh/VwboYfGpBJd+
+[git.jfreudenberger.de]:222 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC8GDSt4LsCzOoIZkqZRLgXyTLyHoJu62cFFP88i8GpSadyV6mJPkK5p2mgBzN/BM9I/G2VWfvqdM8Fy/7p3S8kDhmmkOk1AK7C/+qaQKsKcQauJuzNXlwMHG1Ivath80TO9PIQc9jYakP9xl8SACd5bwkvfEm3rS5awZ8T2hWgnsgO8pFHFOFmFnVbujXZk58FVTCxpgyPqjFv76JSYxpHk1VtiQ52jScsreOImEOWWg88f9IM9etWcshuxte4zudaqc2KjjAB6pYMuVj7O6cwMXKjCUxTzyomWjr2JoEruIslifbZ6bJGgswg5ENJSKURuMPgTuGM6Nrjp75V/yFD
+[git.jfreudenberger.de]:222 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBOS447cAWRZgHPs6MOoRS6/J66oY753QPiM7BI63/qNDd5qrCan153dJd5lBGwDR0vMWiV/0cmzuACfP5QS1Lv8=
+    '')
+    ];
+  };
+}

modules/disko/efi-full-btrfs.nix

@@ -0,0 +1,61 @@
+{
+  disko.devices = {
+    disk = {
+      sda = {
+        type = "disk";
+        device = "/dev/sda";
+        content = {
+          type = "gpt";
+          partitions = {
+            MBR = {
+              type = "EF02"; # for grub MBR
+              size = "1M";
+              priority = 1; # Needs to be first partition
+            };
+            ESP = {
+              priority = 1;
+              name = "ESP";
+              size = "500M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            root = {
+              size = "100%";
+              content = {
+                type = "btrfs";
+                extraArgs = [ "-f" ]; # Override existing partition
+                # Subvolumes must set a mountpoint in order to be mounted,
+                # unless their parent is mounted
+                subvolumes = {
+                  # Subvolume name is different from mountpoint
+                  "/rootfs" = {
+                    mountpoint = "/";
+                  };
+                  # Subvolume name is the same as the mountpoint
+                  "/home" = {
+                    mountOptions = [ "compress=zstd" ];
+                    mountpoint = "/home";
+                  };
+                  # Sub(sub)volume doesn't need a mountpoint as its parent is mounted
+                  "/home/julius" = { };
+                  # Parent is not mounted so the mountpoint must be set
+                  "/nix" = {
+                    mountOptions = [ "compress=zstd" "noatime" ];
+                    mountpoint = "/nix";
+                  };
+                };
+
+                mountpoint = "/partition-root";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

modules/docker.nix

@@ -4,8 +4,11 @@
   ...
 }: {
 
-  virtualisation.docker = {
-    enable = true;
+  virtualisation = {
+    docker = {
+      enable = true;
+    };
+    oci-containers.backend = "docker";
   };
 
 }

modules/k3s.nix

@@ -0,0 +1,28 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+
+  services.k3s = {
+    enable = true;
+    role = "server";
+    token = "verysecrettoken";
+    extraFlags = toString ([
+      "--write-kubeconfig-mode \"0644\""
+      "--disable servicelb"
+      "--disable traefik"
+      "--disable local-storage"
+    ]);
+  };
+
+  networking.firewall.allowedTCPPorts = [
+    6443
+    2379
+    2380
+  ];
+  networking.firewall.allowedUDPPorts = [
+    8472
+  ];
+
+}

modules/portainer_agent.nix

@@ -0,0 +1,21 @@
+{
+  ...
+}: {
+  virtualisation.oci-containers.containers = {
+    portainer_agent = {
+      image = "portainer/agent:2.33.1";
+      volumes = [
+        "/var/run/docker.sock:/var/run/docker.sock"
+        "/var/lib/docker/volumes:/var/lib/docker/volumes"
+        "/:/host"
+      ];
+      environment = {
+        EDGE = "1";
+        CAP_HOST_MANAGEMENT = "1";
+      };
+      extraOptions = [
+        ''--mount=type=volume,source=portainer_agent,target=/data,volume-driver=local''
+      ];
+    };
+  };
+}

modules/qemu-guest.nix

@@ -0,0 +1,7 @@
+{
+  ...
+}: {
+
+  services.qemuGuest.enable = true;
+
+}

modules/sshd.nix

@@ -0,0 +1,13 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  services.openssh = {
+    enable = true;
+    settings = {
+      PasswordAuthentication = false;
+      PermitRootLogin = "no";
+    };
+  };
+}

modules/systemd-boot.nix

@@ -0,0 +1,15 @@
+{
+  ...
+}: {
+
+  boot = {
+    loader = {
+      systemd-boot = {
+        enable = true;
+      };
+      efi.canTouchEfiVariables = true;
+    };
+    tmp.useTmpfs = true;
+  };
+
+}

users/julius/nixos-server.nix

@@ -0,0 +1,23 @@
+{
+  ...
+}: {
+
+  users = {
+    users = {
+      julius = {
+        initialPassword = "password";
+        isNormalUser = true;
+        uid = 1000;
+        group = "julius";
+        extraGroups = [ "wheel" ];
+      };
+    };
+    groups = {
+      julius = {
+        gid = 1000;
+      };
+    };
+  };
+
+  nix.settings.trusted-users = [ "julius" ];
+}

users/nixremote.nix

@@ -0,0 +1,13 @@
+{
+  ...
+}: {
+  users.users = {
+    nixremote = {
+      isNormalUser = true;
+      uid = 1100;
+      group = "users";
+    };
+  };
+
+  nix.settings.trusted-users = [ "nixremote" ];
+}