nixos-config

Collection of configuration files / scripts to setup my NixOS instances

Hosts configurations health

Name	CI Status
blackwood
nixos-flake-test
pasithea
plutus
vm-utility-drone

Disk setup

• scripts/disk-setup.sh - default way of preparing single-disk installation with ZFS as main partition
• required modification to nixos configuration:

  {
  
    # For each zfs entry
    fileSystems."/example" =
      { device = "rpool/entry";
        fsType = "zfs";
        # Add this line
        options = [ "zfsutil" ];
      };
  
    ...
  
    # For /home and /root
    # (otherwise secrets do not work)
    neededForBoot = true;
  
    ...
  
    # For swap entries
    swapDevices = [
      { device = "/dev/disk/by-id/...";
        # Add this line
        randomEncryption = true;
      }
  
    ...
  
    # combat boot error external pointer tables not supported
    boot.loader.grub.copyKernels = true;
    # Disable hibernation explicitly
    boot.kernelParams = [ "nohibernate" ];
    boot.supportedFilesystems = [ "zfs" ];
    boot.zfs.devNodes = "/dev/";
    #boot.zfs.requestEncryptionCredentials = true;
  
    services.zfs.autoScrub.enable = true;
    services.zfs.autoScrub.pools = [ "rpool" ];
    services.zfs.autoSnapshot.enable = true;
    services.zfs.trim.enable = true
  
    ...
  
    networking.hostId = "ffffffff";
    networking.hostName = "fffffffff";
  }
  
  

Secrets setup

For a host (run for root)

1. Create ssh ed25519 key via ssh-keygen -t ed25519 or copy it from backup
2. Create sops-age directory via mkdir -p ~/.config/sops/age
3. Convert ssh to age key nix-shell -p ssh-to-age --run "ssh-to-age -private-key -i ~/.ssh/id_ed25519 > ~/.config/sops/age/keys.txt"
4. Ensure public age key derived from ssh pub key is present in the .sops.yaml (check public key via nix-shell -p ssh-to-age --run 'cat ~/.ssh/id_ed25519.pub | ssh-to-age')

Users passwords

mkpasswd -m sha-512 -> secrets/file.yaml # passwordFile has to contained hashed value!