andromeda: add agenix; machines: start to add box

machines/173-249-5-230/configuration.nix

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+{machine, ...}: {
+  boot.tmp.cleanOnBoot = true;
+  boot.loader.grub.devices = ["nodev"];
+  environment.persistence."/nix/persist" = {
+    enable = true;
+    hideMounts = true;
+    directories = [
+      "/var/log"
+      "/var/lib/nixos"
+      "/var/lib/systemd/coredump"
+      "/etc/NetworkManager/system-connections"
+    ];
+    files = [
+      "/etc/machine-id"
+      "/etc/ly/save.txt"
+    ];
+    users."mtgmonkey" = {
+      directories = [
+        ".local/share/zoxide"
+        ".ssh"
+      ];
+      files = [
+        ".bash_history"
+        ".brush_history"
+      ];
+    };
+  };
+  i18n.defaultLocale = "de_DE.UTF-8";
+  networking = {
+    dhcpcd.enable = true;
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [80 443];
+      allowedUDPPorts = [80 443];
+    };
+    hostName = machine.hostname;
+    domain = "";
+  };
+  nix.settings = {
+    experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
+    allow-import-from-derivation = true;
+  };
+  programs.noshell.enable = true;
+  services.openssh = {
+    enable = true;
+    allowSFTP = false;
+    ports = [5522];
+    settings = {
+      PermitRootLogin = "no";
+      PasswordAuthentication = false;
+      KbdInteractiveAuthentication = true;
+    };
+    extraConfig = ''
+      AllowTcpForwarding no
+      AllowAgentForwarding no
+      MaxAuthTries 3
+      MaxSessions 4
+      TCPKeepAlive no
+    '';
+  };
+  system.stateVersion = "26.05";
+  time.timeZone = "Europe/Berlin";
+  users.users."mtgmonkey" = {
+    isNormalUser = true;
+    description = "mtgmonkey";
+    initialPassword = "password";
+    extraGroups = ["wheel"];
+    openssh.authorizedKeys.keys = machine.pub-keys.ssh;
+  };
+}

machines/173-249-5-230/hardware-configuration.nix

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+# 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 + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = ["xhci_pci" "nvme" "sdhci_pci"];
+  boot.initrd.kernelModules = [];
+  boot.kernelModules = ["kvm-intel"];
+  boot.extraModulePackages = [];
+
+  fileSystems."/" = {
+    #device = "none";
+    #fsType = "tmpfs";
+    #options = ["defaults" "size=60%" "mode=755"];
+    device = "/dev/disk/by-uuid/16c93673-4f0e-4010-a7f4-7ccffb20edb7";
+    fsType = "btrfs";
+    options = ["subvol=root"];
+  };
+
+  boot.initrd.postResumeCommands = lib.mkAfter ''
+    mkdir /btrfs_tmp
+    mount ${config.fileSystems."/".device} /btrfs_tmp
+    if [[ -e /btrfs_tmp/root ]]; then
+      mkdir -p /btrfs_tmp/old_roots
+      timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:$M:%S")
+      mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
+    fi
+
+    delete_subvolume_recursively() {
+      IFS=$'\n'
+      for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+        delete_subvolume_recursively "/btrfs_tmp/$i"
+      done
+      btrfs subvolume delete "$1"
+    }
+
+    for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +30); do
+      delete_subvolume_recursively "$i"
+    done
+
+    btrfs subvolume create /btrfs_tmp/root
+    umount /btrfs_tmp
+  '';
+
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/0e586651-36f4-42b0-99b3-3f0704a894d6";
+    fsType = "btrfs";
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/F425-55BA";
+    fsType = "vfat";
+    options = ["fmask=0022" "dmask=0022"];
+  };
+
+  swapDevices = [];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}

machines/173-249-5-230/machine.nix

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+{
+  hostname = "173-249-5-230";
+  usernames = ["mtgmonkey"];
+  system = "x86_64-linux";
+  configuration = ./configuration.nix;
+  hardware-configuration = ./hardware-configuration.nix;
+  pub-keys = {
+    ssh = [];
+  };
+}