disko/example/zfs-over-legacy.nix

{ disks ? [ "/dev/vdb" "/dev/vdc" ] }: {
  disk = {
    vdb = {
      type = "disk";
      device = builtins.elemAt disks 0;
      content = {
        type = "table";
        format = "gpt";
        partitions = [
          {
            type = "partition";
            name = "ESP";
            start = "1MiB";
            end = "100MiB";
            bootable = true;
            content = {
              type = "filesystem";
              format = "vfat";
              mountpoint = "/boot";
              options = [
                "defaults"
              ];
            };
          }
          {
            type = "partition";
            start = "100MiB";
            end = "100%";
            name = "primary";
            bootable = true;
            content = {
              type = "filesystem";
              format = "ext4";
              mountpoint = "/";
            };
          }
        ];
      };
    };
    vdc = {
      type = "disk";
      device = builtins.elemAt disks 1;
      content = {
        type = "zfs";
        pool = "zroot";
      };
    };
  };
  zpool = {
    zroot = {
      type = "zpool";
      rootFsOptions.mountpoint = "none";
      datasets = {
        "root" = {
          zfs_type = "filesystem";
          options.mountpoint = "none";
        };
        "root/zfs_fs" = {
          zfs_type = "filesystem";
          mountpoint = "/zfs_fs";
          options.mountpoint = "/zfs_fs";
          options."com.sun:auto-snapshot" = "true";
        };
      };
    };
  };
}