nix/nixos/hosts/osaka-vultr-01/disks.nix

{
  boot.loader.grub.device = "/dev/vda";
  boot.initrd.luks.devices."vda2".device = "/dev/vda2";
  disko.devices = {
    disk = {
      vda = {
        type = "disk";
        device = "/dev/vda";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              size = "100M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
              };
            };
            luks = {
              size = "100%";
              content = {
                type = "luks";
                name = "crypted";
                extraOpenArgs = [ "--allow-discards" ];
                content = {
                  type = "filesystem";
                  format = "ext4";
                  mountpoint = "/";
                };
              };
            };
          };
        };
      };
    };
  };
}