disko/example/luks-btrfs-subvolumes.nix

{
  disko.devices = {
    disk = {
      vdb = {
        type = "disk";
        device = "/dev/vdb";
        content = {
          type = "gpt";
          partitions = {
            ESP = {
              size = "512M";
              type = "EF00";
              content = {
                type = "filesystem";
                format = "vfat";
                mountpoint = "/boot";
                mountOptions = [
                  "defaults"
                ];
              };
            };
            luks = {
              size = "100%";
              content = {
                type = "luks";
                name = "crypted";
                extraOpenArgs = [ "--allow-discards" ];
                # if you want to use the key for interactive login be sure there is no trailing newline
                # for example use `echo -n "password" > /tmp/secret.key`
                #passwordFile = "/tmp/secret.key"; # Interactive
                settings.keyFile = "/tmp/secret.key";
                additionalKeyFiles = [ "/tmp/additionalSecret.key" ];
                content = {
                  type = "btrfs";
                  extraArgs = [ "-f" ];
                  subvolumes = {
                    "/root" = {
                      mountpoint = "/";
                      mountOptions = [ "compress=zstd" "noatime" ];
                    };
                    "/home" = {
                      mountpoint = "/home";
                      mountOptions = [ "compress=zstd" "noatime" ];
                    };
                    "/nix" = {
                      mountpoint = "/nix";
                      mountOptions = [ "compress=zstd" "noatime" ];
                    };
                  };
                };
              };
            };
          };
        };
      };
    };
  };
}