def restore_to_file_without_backing_file_test(dev, backup_target):
length0 = 256
length1 = 128
offset0 = 0
offset1 = length1 + offset0
output_raw_path = file(OUTPUT_FILE_RAW)
output_qcow2_path = file(OUTPUT_FILE_QCOW2)
# create 1 empty snapshot for converting to init state.
snap0 = cmd.snapshot_create()
# create 1 snapshot with 256B data.
# output = snap2(offset0, length1)
snap1_data = common.random_string(length0)
common.verify_data(dev, offset0, snap1_data)
snap1 = cmd.snapshot_create()
backup = create_backup(backup_target, snap1)
cmd.restore_to_file(backup, "",
output_raw_path, IMAGE_FORMAT_RAW)
output1_raw = read_file(output_raw_path, offset0, length0)
assert output1_raw == snap1_data
os.remove(output_raw_path)
assert not os.path.exists(output_raw_path)
cmd.restore_to_file(backup, "",
output_qcow2_path, IMAGE_FORMAT_QCOW2)
output1_qcow2 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset0, length0)
assert output1_qcow2 == snap1_data
os.remove(output_qcow2_path)
assert not os.path.exists(output_qcow2_path)
cmd.snapshot_revert(snap0)
rm_snaps([snap1])
rm_backups([backup])
# create 2 snapshots with 256B data and 128B data
# output = snap2(offset0, length1 - length2) +
# snap1(offset2, length2)
snap1_data = common.random_string(length0)
common.verify_data(dev, offset0, snap1_data)
snap1 = cmd.snapshot_create()
snap2_data = common.random_string(length1)
common.verify_data(dev, offset0, snap2_data)
snap2 = cmd.snapshot_create()
backup = create_backup(backup_target, snap2)
cmd.restore_to_file(backup, "",
output_raw_path, IMAGE_FORMAT_RAW)
output2_raw_snap2 = read_file(
output_raw_path, offset0, length1)
output2_raw_snap1 = read_file(
output_raw_path, offset1, length0 - length1)
assert output2_raw_snap2 == snap2_data
assert output2_raw_snap1 == snap1_data[offset1: length0]
cmd.restore_to_file(backup, "",
output_qcow2_path, IMAGE_FORMAT_QCOW2)
output2_qcow2_snap2 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset0, length1)
output2_qcow2_snap1 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset1, length0 - length1)
assert output2_qcow2_snap2 == snap2_data
assert output2_qcow2_snap1 == snap1_data[offset1: length0]
os.remove(output_qcow2_path)
assert not os.path.exists(output_qcow2_path)
cmd.snapshot_revert(snap0)
rm_snaps([snap1, snap2])
rm_backups([backup])
def restore_to_file_with_backing_file_test(backing_dev, backup_target):
length0 = 4 * 1024
length1 = 256
length2 = 128
offset0 = 0
offset1 = length1 + offset0
offset2 = length2 + offset0
output_raw_path = file(OUTPUT_FILE_RAW)
output_qcow2_path = file(OUTPUT_FILE_QCOW2)
# create 1 empty snapshot.
# data in output image == data in backing
check_backing()
check_empty_volume(backing_dev)
snap0 = cmd.snapshot_create()
backup = create_backup(backup_target, snap0)
volume_data = read_dev(backing_dev, offset0, length0)
backing_data = read_from_backing_file(offset0, length0)
dev_checksum = common.checksum_dev(backing_dev)
assert volume_data != ""
assert volume_data == backing_data
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_raw_path, IMAGE_FORMAT_RAW)
output0_raw = read_file(output_raw_path, offset0, length0)
output0_checksum = checksum_data(
read_file(output_raw_path, 0, SIZE))
assert output0_raw == backing_data
assert output0_checksum == dev_checksum
os.remove(output_raw_path)
assert not os.path.exists(output_raw_path)
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_qcow2_path, IMAGE_FORMAT_QCOW2)
output0_qcow2 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset0, length0)
output0_checksum = checksum_data(
read_qcow2_file_without_backing_file(output_qcow2_path, 0, SIZE))
assert output0_qcow2 == backing_data
assert output0_qcow2 == volume_data
assert output0_checksum == dev_checksum
os.remove(output_qcow2_path)
assert not os.path.exists(output_qcow2_path)
rm_backups([backup])
# create 1 snapshot with 256B data.
# output = snap1(offset0, length1) + backing(offset1, ...)
snap1_data = common.random_string(length1)
common.verify_data(backing_dev, offset0, snap1_data)
snap1 = cmd.snapshot_create()
backup = create_backup(backup_target, snap1)
volume_data = read_dev(backing_dev, offset0, length0)
backing_data = read_from_backing_file(
offset1, length0 - offset1)
dev_checksum = common.checksum_dev(backing_dev)
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_raw_path, IMAGE_FORMAT_RAW)
output1_raw_snap1 = read_file(
output_raw_path, offset0, length1)
output1_raw_backing = read_file(
output_raw_path, offset1, length0 - offset1)
output1_checksum = checksum_data(
read_file(output_raw_path, 0, SIZE))
assert output1_raw_snap1 == snap1_data
assert output1_raw_backing == backing_data
assert output1_raw_snap1 + output1_raw_backing == volume_data
assert output1_checksum == dev_checksum
os.remove(output_raw_path)
assert not os.path.exists(output_raw_path)
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_qcow2_path, IMAGE_FORMAT_QCOW2)
output1_qcow2_snap1 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset0, length1)
output1_qcow2_backing = read_qcow2_file_without_backing_file(
output_qcow2_path, offset1, length0 - offset1)
output1_checksum = checksum_data(
read_qcow2_file_without_backing_file(output_qcow2_path, 0, SIZE))
assert output1_qcow2_snap1 == snap1_data
assert output1_qcow2_backing == backing_data
assert output1_qcow2_snap1 + output1_qcow2_backing == volume_data
assert output1_checksum == dev_checksum
os.remove(output_qcow2_path)
assert not os.path.exists(output_qcow2_path)
cmd.snapshot_revert(snap0)
rm_snaps([snap1])
rm_backups([backup])
check_backing()
check_empty_volume(backing_dev)
# create 2 snapshots with 256B data and 128B data
# output = snap2(offset0, length1 - length2) +
# snap1(offset2, length2) + backing(offset2, ...)
snap1_data = common.random_string(length1)
common.verify_data(backing_dev, offset0, snap1_data)
snap1 = cmd.snapshot_create()
snap2_data = common.random_string(length2)
common.verify_data(backing_dev, offset0, snap2_data)
snap2 = cmd.snapshot_create()
backup = create_backup(backup_target, snap2)
volume_data = read_dev(backing_dev, offset0, length0)
backing_data = read_from_backing_file(
offset1, length0 - offset1)
dev_checksum = common.checksum_dev(backing_dev)
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_raw_path, IMAGE_FORMAT_RAW)
output2_raw_snap2 = read_file(
output_raw_path, offset0, length2)
output2_raw_snap1 = read_file(
output_raw_path, offset2, length1 - length2)
output2_raw_backing = read_file(
output_raw_path, offset1, length0 - offset1)
output2_checksum = checksum_data(
read_file(output_raw_path, 0, SIZE))
assert output2_raw_snap2 == snap2_data
assert output2_raw_snap1 == snap1_data[offset2: length1]
assert output2_raw_backing == backing_data
assert \
volume_data == \
output2_raw_snap2 + output2_raw_snap1 + output2_raw_backing
assert output2_checksum == dev_checksum
os.remove(output_raw_path)
assert not os.path.exists(output_raw_path)
cmd.restore_to_file(backup, file(BACKING_FILE_QCOW2),
output_qcow2_path, IMAGE_FORMAT_QCOW2)
output2_qcow2_snap2 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset0, length2)
output2_qcow2_snap1 = read_qcow2_file_without_backing_file(
output_qcow2_path, offset2, length1 - length2)
output2_qcow2_backing = read_qcow2_file_without_backing_file(
output_qcow2_path, offset1, length0 - offset1)
output2_checksum = checksum_data(
read_qcow2_file_without_backing_file(output_qcow2_path, 0, SIZE))
assert output2_qcow2_snap2 == snap2_data
assert output2_qcow2_snap1 == snap1_data[offset2: length1]
assert output2_qcow2_backing == backing_data
assert \
volume_data == \
output2_qcow2_snap2 + output2_qcow2_snap1 + output1_qcow2_backing
assert output2_checksum == dev_checksum
os.remove(output_qcow2_path)
assert not os.path.exists(output_qcow2_path)
cmd.snapshot_revert(snap0)
rm_snaps([snap1, snap2])
rm_backups([backup])
check_backing()
check_empty_volume(backing_dev)
def restore_inc_test(
controller,
replica1,
replica2, # NOQA
sb_controller,
sb_replica1,
sb_replica2,
backup_target): # NOQA
launcher.start_engine_frontend(FRONTEND_TGT_BLOCKDEV, url=LAUNCHER)
dev = common.get_dev(replica1, replica2, controller)
zero_string = b'\x00'.decode('utf-8')
# backup0: 256 random data in 1st block
length0 = 256
snap0_data = common.random_string(length0)
verify_data(dev, 0, snap0_data)
verify_data(dev, BLOCK_SIZE, snap0_data)
snap0 = cmd.snapshot_create()
backup0 = create_backup(backup_target, snap0)
backup0_name = cmd.backup_inspect(backup0)['Name']
# backup1: 32 random data + 32 zero data + 192 random data in 1st block
length1 = 32
offset1 = 32
snap1_data = zero_string * length1
verify_data(dev, offset1, snap1_data)
snap1 = cmd.snapshot_create()
backup1 = create_backup(backup_target, snap1)
backup1_name = cmd.backup_inspect(backup1)['Name']
# backup2: 32 random data + 256 random data in 1st block,
# 256 random data in 2nd block
length2 = 256
offset2 = 32
snap2_data = common.random_string(length2)
verify_data(dev, offset2, snap2_data)
verify_data(dev, BLOCK_SIZE, snap2_data)
snap2 = cmd.snapshot_create()
backup2 = create_backup(backup_target, snap2)
backup2_name = cmd.backup_inspect(backup2)['Name']
# backup3: 64 zero data + 192 random data in 1st block
length3 = 64
offset3 = 0
verify_data(dev, offset3, zero_string * length3)
verify_data(dev, length2, zero_string * offset2)
verify_data(dev, BLOCK_SIZE, zero_string * length2)
snap3 = cmd.snapshot_create()
backup3 = create_backup(backup_target, snap3)
backup3_name = cmd.backup_inspect(backup3)['Name']
# backup4: 256 random data in 1st block
length4 = 256
offset4 = 0
snap4_data = common.random_string(length4)
verify_data(dev, offset4, snap4_data)
snap4 = cmd.snapshot_create()
backup4 = create_backup(backup_target, snap4)
backup4_name = cmd.backup_inspect(backup4)['Name']
common.cleanup_replica(replica1)
common.cleanup_replica(replica2)
common.cleanup_controller(controller)
launcher.shutdown_engine_frontend(url=LAUNCHER)
# start no-frontend volume
# start standby volume (no frontend)
start_no_frontend_volume(sb_controller, sb_replica1, sb_replica2)
restore_for_no_frontend_volume(backup0, sb_controller)
verify_no_frontend_data(0, snap0_data, sb_controller)
# mock restore crash/error
delta_file1 = "volume-delta-" + backup0_name + ".img"
if "vfs" in backup_target:
command = ["find", VFS_DIR, "-type", "d", "-name", VOLUME_NAME]
backup_volume_path = subprocess.check_output(command).strip()
command = ["find", backup_volume_path, "-name", "*blk"]
blocks = subprocess.check_output(command).split()
assert len(blocks) != 0
for blk in blocks:
command = ["mv", blk, blk + ".tmp"]
subprocess.check_output(command).strip()
with pytest.raises(subprocess.CalledProcessError):
cmd.restore_inc(backup1, backup0_name, CONTROLLER_NO_FRONTEND)
assert path.exists(STANDBY_REPLICA1_PATH + delta_file1)
assert path.exists(STANDBY_REPLICA2_PATH + delta_file1)
for blk in blocks:
command = ["mv", blk + ".tmp", blk]
subprocess.check_output(command)
data1 = \
snap0_data[0:offset1] + snap1_data + \
snap0_data[offset1+length1:]
cmd.restore_inc(backup1, backup0_name, CONTROLLER_NO_FRONTEND)
verify_no_frontend_data(0, data1, sb_controller)
assert not path.exists(STANDBY_REPLICA1_PATH + delta_file1)
assert not path.exists(STANDBY_REPLICA2_PATH + delta_file1)
volume_info = cmd.info(CONTROLLER_NO_FRONTEND)
assert volume_info['lastRestored'] == backup1_name
data2 = \
data1[0:offset2] + snap2_data + \
zero_string * (BLOCK_SIZE - length2 - offset2) + snap2_data
cmd.restore_inc(backup2, backup1_name, CONTROLLER_NO_FRONTEND)
verify_no_frontend_data(0, data2, sb_controller)
delta_file2 = "volume-delta-" + backup1_name + ".img"
assert not path.exists(STANDBY_REPLICA1_PATH + delta_file2)
assert not path.exists(STANDBY_REPLICA2_PATH + delta_file2)
volume_info = cmd.info(CONTROLLER_NO_FRONTEND)
assert volume_info['lastRestored'] == backup2_name
# mock race condition
with pytest.raises(subprocess.CalledProcessError) as e:
cmd.restore_inc(backup1, backup0_name, CONTROLLER_NO_FRONTEND)
assert "doesn't match lastRestored" in e
data3 = zero_string * length3 + data2[length3:length2]
cmd.restore_inc(backup3, backup2_name, CONTROLLER_NO_FRONTEND)
verify_no_frontend_data(0, data3, sb_controller)
delta_file3 = "volume-delta-" + backup3_name + ".img"
assert not path.exists(STANDBY_REPLICA1_PATH + delta_file3)
assert not path.exists(STANDBY_REPLICA2_PATH + delta_file3)
volume_info = cmd.info(CONTROLLER_NO_FRONTEND)
assert volume_info['lastRestored'] == backup3_name
# mock corner case: invalid last-restored backup
rm_backups([backup3])
# actually it is full restoration
cmd.restore_inc(backup4, backup3_name, CONTROLLER_NO_FRONTEND)
verify_no_frontend_data(0, snap4_data, sb_controller)
volume_info = cmd.info(CONTROLLER_NO_FRONTEND)
assert volume_info['lastRestored'] == backup4_name
if "vfs" in backup_target:
command = ["find", VFS_DIR, "-type", "d", "-name", VOLUME_NAME]
backup_volume_path = subprocess.check_output(command).strip()
command = ["find", backup_volume_path, "-name", "*tempoary"]
tmp_files = subprocess.check_output(command).split()
assert len(tmp_files) == 0
cleanup_no_frontend_volume(sb_controller, sb_replica1, sb_replica2)
rm_backups([backup0, backup1, backup2, backup4])