gistfile1.txt

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("1GiB"), grow=True, 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)

    # pool root
    pool00 = b.new_lv(parents=[vg], thin_pool=True, size=Size("16GiB"), grow=False)
    b.create_device(pool00)

    root = b.new_lv(parents=[pool00], thin_volume=True, name="root", size=Size("1GiB"), grow=True, fmt_type="ext4")
    b.create_device(root)

    # new lv with a fixed size of 2GiB formatted as swap space
    swap = b.new_lv(fmt_type="swap", size=Size("2GiB"), parents=[vg])
    b.create_device(swap)

    # pool vm
    pool01 = b.new_lv(parents=[vg], thin_pool=True, grow=True, size=Size("1GiB"))
    b.create_device(pool01)

    # 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)