old_contents: import os
  
  import blivet
  from blivet.size import Size
  from blivet.util import set_up_logging, create_sparse_tempfile
  
  set_up_logging()
  b = blivet.Blivet()   # create an instance of Blivet (don't add system devices)
  
  # create a disk image file on which to create new devices
  disk1_file = create_sparse_tempfile("disk1", Size("100GiB"))
  b.disk_images["disk1"] = disk1_file
  
  b.reset()
  
  try:
      disk1 = b.devicetree.get_device_by_name("disk1")
  
      b.initialize_disk(disk1)
  
      pv = b.new_partition(size=Size("50GiB"), fmt_type="lvmpv")
      b.create_device(pv)
  
      # allocate the partitions (decide where and on which disks they'll reside)
      blivet.partitioning.do_partitioning(b)
  
      vg = b.new_vg(parents=[pv])
      b.create_device(vg)
  
      # new lv with base size 5GiB and unbounded growth and an ext4 filesystem
      dev = b.new_lv(fmt_type="ext4", size=Size("5GiB"), grow=True,
                     parents=[vg], name="unbounded")
      b.create_device(dev)
  
      # new lv with base size 5GiB and growth up to 15GiB and an ext4 filesystem
      dev = b.new_lv(fmt_type="ext4", size=Size("5GiB"), grow=True,
                     maxsize=Size("15GiB"), parents=[vg], name="bounded")
      b.create_device(dev)
  
      # new lv with a fixed size of 2GiB formatted as swap space
      dev = b.new_lv(fmt_type="swap", size=Size("2GiB"), parents=[vg])
      b.create_device(dev)
  
      # allocate the growable lvs
      blivet.partitioning.grow_lvm(b)
      print(b.devicetree)
  
      # write the new partitions to disk and format them as specified
      b.do_it()
      print(b.devicetree)
  finally:
      b.devicetree.teardown_disk_images()
      os.unlink(disk1_file)
  
new_contents: import os
  
  import blivet
  from blivet.size import Size
  from blivet.util import set_up_logging, create_sparse_tempfile
  from blivet.devices import LUKSDevice
  
  set_up_logging()
  b = blivet.Blivet()   # create an instance of Blivet (don't add system devices)
  
  # create a disk image file on which to create new devices
  disk1_file = create_sparse_tempfile("disk1", Size("100GiB"))
  b.disk_images["disk1"] = disk1_file
  
  b.reset()
  
  try:
      disk1 = b.devicetree.get_device_by_name("disk1")
  
      b.initialize_disk(disk1)
  
      pv = b.new_partition(size=Size("50GiB"), fmt_type="lvmpv")
      b.create_device(pv)
  
      # allocate the partitions (decide where and on which disks they'll reside)
      blivet.partitioning.do_partitioning(b)
  
      vg = b.new_vg(parents=[pv])
      b.create_device(vg)
  
      # new lv with base size 5GiB and unbounded growth and an ext4 filesystem
      dev = b.new_lv(fmt_type="ext4", size=Size("5GiB"), grow=True,
                     parents=[vg], name="unbounded")
      b.create_device(dev)
  
      # new lv with base size 5GiB and growth up to 15GiB and an ext4 filesystem
      dev = b.new_lv(fmt_type="ext4", size=Size("5GiB"), grow=True,
                     maxsize=Size("15GiB"), parents=[vg], name="bounded")
      b.create_device(dev)
  
      # new lv with a fixed size of 2GiB formatted as swap space
      dev = b.new_lv(fmt_type="swap", size=Size("2GiB"), parents=[vg])
      b.create_device(dev)
  
      # new LUKS encrypted lv with fixed size of 10GiB and ext4 filesystem
      dev = b.new_lv(fmt_type="luks", fmt_args={"passphrase": "12345"},
                     size=Size("10GiB"), parents=[vg], name="encrypted")
      b.create_device(dev)
  
      luks_dev = LUKSDevice(name="luks-%s" % dev.name,
                            size=dev.size, parents=[dev])
      b.create_device(luks_dev)
  
      luks_fmt = blivet.formats.get_format(fmt_type="ext4", device=luks_dev.path)
      b.format_device(luks_dev, luks_fmt)
  
      # allocate the growable lvs
      blivet.partitioning.grow_lvm(b)
      print(b.devicetree)
  
      # write the new partitions to disk and format them as specified
      b.do_it()
      print(b.devicetree)
  finally:
      b.devicetree.teardown_disk_images()
      os.unlink(disk1_file)
  
subject: Add LUKS encrypted LV to LVM example