1. lampadas

The NAS

1. lampadas
1.1. Setup
1.2. Installation
1.2.1. partitions
1.2.1.1. system drive
1.2.1.2. data drives
1.2.2. luks
1.2.2.1. system drive
1.2.2.2. data drives
1.2.3. filesystems
1.2.3.1. system drive
1.2.3.2. data drives
1.2.4. mount stuff
1.2.5. nixos install
2. Troubleshooting
3. Nix foo

1.1. Setup

motherboard: Asrock n100m
ram: idk.
data drives: 1TB Evo 970 + 1TB Evo 960 pro
system drive: 128GB Intenso

sda (1TB SSD)

  sda1

    luks

      btrfs raid1 (data)

sdb (1TB SSD)

  sdb1

    luks

      btrfs raid1 (data)

sdc (128GB SSD)

  sdc1

    btrfs (root)

  sdc2

    fat32 (boot)

1.2. Installation

1.2.1. partitions

1.2.1.1. system drive

parted --script --align optimal /dev/sdc -- mklabel gpt mkpart root 512MB 100% mkpart ESP fat32 1MB 512MB set 2 esp on

1.2.1.2. data drives

parted --script --align optimal /dev/sda -- mklabel gpt mkpart root 512MB 100%

parted --script --align optimal /dev/sdb -- mklabel gpt mkpart root 512MB 100%

1.2.2. luks

curl -O http://192.168.1.102:8080/lampadas_luks_key

1.2.2.1. system drive

cat lampadas_luks_key | cryptsetup luksFormat /dev/sdc1

cat lampadas_luks_key | cryptsetup luksOpen /dev/sdc1 luksroot1

1.2.2.2. data drives

cat lampadas_luks_key | cryptsetup luksFormat /dev/sda1

cat lampadas_luks_key | cryptsetup luksOpen /dev/sda1 luksdata1

cat lampadas_luks_key | cryptsetup luksFormat /dev/sdb1

cat lampadas_luks_key | cryptsetup luksOpen /dev/sdb1 luksdata2

1.2.3. filesystems

1.2.3.1. system drive

mkfs.btrfs -L root1 /dev/mapper/luksroot1

mkdir -p /mnt

mount /dev/mapper/luksroot1 /mnt

btrfs subvolume create /mnt/root

btrfs subvolume create /mnt/home

btrfs subvolume create /mnt/nix

umount /mnt

mkdir /mnt/{home,nix}

mount UUID=$(btrfs fi show | grep -Eo "[0-9a-z-]{16,}") -o compress=zstd,subvol=root /mnt

mount UUID=$(btrfs fi show | grep -Eo "[0-9a-z-]{16,}") -o compress=zstd,subvol=home /mnt/home

mount UUID=$(btrfs fi show | grep -Eo "[0-9a-z-]{16,}") -o compress=zstd,noatime,subvol=nix/mnt/nix

mkfs.fat -F 32 -n boot /dev/sdc2

1.2.3.2. data drives

create the btrfs filesystem on the luks filesystem:

mkfs.btrfs -L data1 /dev/mapper/luksdata1

mkfs.btrfs -L data2 /dev/mapper/luksdata2

mkdir -p /mnt/data

mount /dev/mapper/luksdata1 /mnt/data

add the second device (-f, as we've already got btrfs on the second drive):

btrfs device add -f /dev/mapper/luksdata2 /mnt/data

balance the raid1 (-dconvert converts data chunks, -mconvert converts metadata chunks)

btrfs balance start -dconvert=raid1 -mconvert=raid1 /mnt/data

1.2.4. mount stuff

mkdir /mnt/boot

mount -o umask=077 /dev/disk/by-label/boot /mnt/boot

1.2.5. nixos install

nixos-generate-config --root /mnt

cd /etc/nixos

mv configuration.nix config_orig.nix

curl -O http://192.168.1.102:8080/configuration.nix

Generate a host key for the initrd ssh session allowing us to enter the luks
password via ssh

ssh-keygen -t ed25519 -N "" -f initrd_ssh_host_key_ed25519

cp initrd_ssh_host_key_ed25519 /mnt

nixos-install

2. Troubleshooting

boot into a nixos installer image

open the luks

curl -O http://192.168.1.102:8080/lampadas_luks_key

cat lampadas_luks_key | cryptsetup luksOpen /dev/sda1 luksroot1

cat lampadas_luks_key | cryptsetup luksOpen /dev/sdb1 luksroot2

figure out the uuid using `btrfs fi show` and insert it at the beginning of the
search term used in the grep below in order to mount the drives:

mkdir /mnt/{home,nix}

mount UUID=$(btrfs fi show | grep -Eo "c9[0-9a-z-]{16,}") -o compress=zstd,subvol=root /mnt

mount UUID=$(btrfs fi show | grep -Eo "c9[0-9a-z-]{16,}") -o compress=zstd,subvol=home /mnt/home

mount UUID=$(btrfs fi show | grep -Eo "c9[0-9a-z-]{16,}") -o compress=zstd,noatime,subvol=nix /mnt/nix

mount /dev/disk/by-label/boot /mnt/boot

3. Nix foo

# Edit this configuration file to define what should be installed on

# your system. Help is available in the configuration.nix(5) man page, on

# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).

{ pkgs, ... }:

let 

  emile_keys = [

    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPZi43zHEsoWaQomLGaftPE5k0RqVrZyiTtGqZlpWsew emile@caladan"

    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEzLZ56SEgwZZ0OusTdSDDhpMlxSg1zPNdRLuxKOfrR5 emile@chusuk"

];

in {

  imports =

    [ # Include the results of the hardware scan.

      ./hardware-configuration.nix

    ];

  boot = {

    loader = {

      systemd-boot.enable = true;

      efi.canTouchEfiVariables = true;

    };

    kernelParams = [ "ip=dhcp" ];

    initrd = {

      availableKernelModules = [ "r8169" ];

      systemd.users.root.shell = "/bin/cryptsetup-askpass";

      network = {

        enable = true;

        ssh = {

          enable = true;

          port = 22;

          hostKeys = ["/initrd_ssh_host_key_ed25519"];

          authorizedKeys = emile_keys;

        };

        postCommands = ''

          echo 'cryptsetup-askpass' > /root/.profile

        '';

      };

    };

  };

  fileSystems = {

    "/".options = ["compress=zstd"];

    "/home".options = ["compress=zstd"];

    "/nix".options = ["compress=zstd" "noatime"];

  };

  networking = {

    hostName = "lampadas";

    firewall.enable = true;

  };

  time.timeZone = "Europe/Berlin";

  powerManagement = {

    powertop.enable = true;

    scsiLinkPolicy = "med_power_with_dipm";

  };

  users = {

    mutableUsers = false;

    users = {

      root = {

        hashedPassword = "";

        openssh.authorizedKeys.keys = emile_keys;

      };

      emile = {

        isNormalUser = true;

        extraGroups = [ "wheel" ];

        openssh.authorizedKeys.keys = emile_keys;

      };

    };

  };

  environment.systemPackages = with pkgs; [ vim tailscale ];

  programs.mosh.enable = true;

  services = {

    # traffic metrics

    vnstat.enable = true;

    # ssh access

    openssh = {

      enable = true;

      settings = {

        PasswordAuthentication = false;

        KbdInteractiveAuthentication = false;

      };

    };

    # VPN

    tailscale.enable = true;

    # filesystem stuff

    btrfs = {

      autoScrub.enable = true;

      autoScrub.interval = "weekly";

    };

    # metric exporters

    prometheus.exporters = {

      node.enable = true;

      systemd.enable = true;

      smartctl.enable = true;

    };

    # shares

    samba = {

      enable = true;

      openFirewall = true;

      securityType = "user";

      extraConfig = ''

        workgroup = WORKGROUP

        server string = lampadas

        netbios name = lampadas

        security = user

        hosts allow = 100.64.0.0/255.192.0.0, 127.0.0.1/255.0.0.0, ::1, 192.168.0.

        hosts deny = 0.0.0.0/0

        guest account = nobody

        map to guest = bad user

        load printers = no

        server min protocol = SMB3

        server smb encrypt = required 

        read raw = Yes

        write raw = Yes

        socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=131072 SO_SNDBUF=131072

        min receivefile size = 16384

        use sendfile = true

        aio read size = 16384

        aio write size = 16384

        server multi channel support = yes

      '';

      shares = {

        public = {

          path = "/data/public";

          "browseable" = "yes";

          "read only" = "no";

          "guest ok" = "yes";

          "create mask" = "0644";

          "directory mask" = "0755";

          "force user" = "emile";

          "force group" = "users";

          "comment" = "public data";

        };

        private = {

          path = "/data/private";

          "browseable" = "yes";

          "read only" = "no";

          "guest ok" = "no";

          "create mask" = "0644";

          "directory mask" = "0755";

          "force user" = "emile";

          "force group" = "users";

          "comment" = "private data (no flags though)";

        };

        time_machine = {

          path = "/data/time_machine";

          "public" = "no";

          "writeable" = "yes";

          "valid users" = "emile";

          "force user" = "emile"; 

          "fruit:aapl" = "yes";

          "fruit:time machine" = "yes";

          # otherwise, copying on the server happens Server -> Client ->

          # Server (but only on macos)

          "fruit:copyfile" = "yes";

          "vfs objects" = "catia fruit streams_xattr";

          "comment" = "time machine backups";

        };

      };

    };

  };

  system = {

    stateVersion = "23.11";

    autoUpgrade.enable = true;

  };

  nix = {

    gc = {

      automatic = true;

      dates = "weekly";

      options = "--delete-older-than 14d";

    };

    settings = {

      auto-optimise-store = true;

    };

  };

}

emile - 1734444931.036221s - generated using vokobe "0.1.3"