88 lines
3.1 KiB
Python
88 lines
3.1 KiB
Python
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#
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# Tasks for creating snapshots.
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions of
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# the GNU General Public License v.2, or (at your option) any later version.
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY expressed or implied, including the implied warranties of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details. You should have received a copy of the
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# GNU General Public License along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
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# source code or documentation are not subject to the GNU General Public
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# License and may only be used or replicated with the express permission of
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# Red Hat, Inc.
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#
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from blivet.formats.fs import XFS
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from pykickstart.constants import SNAPSHOT_WHEN_POST_INSTALL, SNAPSHOT_WHEN_PRE_INSTALL
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from pyanaconda.anaconda_loggers import get_module_logger
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from pyanaconda.modules.common.task.task import Task
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from pyanaconda.modules.storage.snapshot.device import get_snapshot_device
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log = get_module_logger(__name__)
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__all__ = ["SnapshotCreateTask"]
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class SnapshotCreateTask(Task):
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"""A task for creating snapshots."""
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def __init__(self, storage, requests, when):
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"""Create a new task.
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:param storage: an instance of Blivet
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:param requests: a list of the snapshot requests
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:param when: when the snapshots are created
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"""
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super().__init__()
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self._storage = storage
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self._requests = requests
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self._when = when
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@property
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def name(self):
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return "Create snapshots"
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def run(self):
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"""Run the task."""
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self._create_snapshots(self._storage, self._requests, self._when)
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def _create_snapshots(self, storage, requests, when):
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"""Create the snapshots.
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:param storage: an instance of Blivet
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:param requests: a list of the snapshot requests
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:param when: when the snapshots are created
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"""
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if when == SNAPSHOT_WHEN_POST_INSTALL:
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self._populate_devicetree(storage)
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for request in requests:
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self._create_snapshot(storage, request)
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if when == SNAPSHOT_WHEN_PRE_INSTALL:
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self._populate_devicetree(storage)
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def _populate_devicetree(self, storage):
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"""Populate a device tree of the given storage."""
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storage.devicetree.populate()
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storage.devicetree.teardown_all()
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def _create_snapshot(self, storage, request):
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"""Create the ThinLV snapshot.
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:param storage: an instance of Blivet
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:param request: a snapshot request
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"""
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log.debug("Snapshot: creating snapshot %s", request.name)
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device = get_snapshot_device(request, storage.devicetree)
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device.create()
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if isinstance(device.format, XFS):
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log.debug("Generating new UUID for XFS snapshot")
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device.format.reset_uuid()
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