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nfs.py
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nfs.py
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#
# The NFS source module.
#
# Copyright (C) 2020 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details. You should have received a copy of the
# GNU General Public License along with this program; if not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
import os.path
from pyanaconda.core.i18n import _
from pyanaconda.core.payload import create_nfs_url, parse_nfs_url
from pyanaconda.core.signal import Signal
from pyanaconda.modules.common.structures.payload import RepoConfigurationData
from pyanaconda.modules.payloads.constants import SourceType, SourceState
from pyanaconda.modules.payloads.source.nfs.nfs_interface import NFSSourceInterface
from pyanaconda.modules.payloads.source.nfs.initialization import SetUpNFSSourceTask
from pyanaconda.modules.payloads.source.mount_tasks import TearDownMountTask
from pyanaconda.modules.payloads.source.source_base import PayloadSourceBase, RPMSourceMixin
from pyanaconda.modules.payloads.source.utils import MountPointGenerator
from pyanaconda.anaconda_loggers import get_module_logger
log = get_module_logger(__name__)
__all__ = ["NFSSourceModule"]
class NFSSourceModule(PayloadSourceBase, RPMSourceMixin):
"""The NFS source module.
TODO: Merge code from HardDriveSourceModule and this one.
TODO: Add install_tree_path property.
"""
def __init__(self):
super().__init__()
self._url = ""
self.url_changed = Signal()
self._install_tree_path = ""
self._device_mount = MountPointGenerator.generate_mount_point(
self.type.value.lower() + "-device"
)
self._iso_mount = MountPointGenerator.generate_mount_point(
self.type.value.lower() + "-iso"
)
def __repr__(self):
return "Source(type='NFS', url='{}')".format(self.url)
def for_publication(self):
"""Return a DBus representation."""
return NFSSourceInterface(self)
@property
def type(self):
"""Get type of this source."""
return SourceType.NFS
@property
def description(self):
"""Get description of this source."""
return _("NFS server {}").format(self.url)
@property
def network_required(self):
"""Does the source require a network?
:return: True or False
"""
return True
def get_state(self):
"""Get state of this source."""
res = os.path.ismount(self._device_mount) and bool(self._install_tree_path)
return SourceState.from_bool(res)
def process_kickstart(self, data):
"""Process the kickstart data."""
nfs_url = create_nfs_url(data.nfs.server, data.nfs.dir, data.nfs.opts)
self.set_url(nfs_url)
def setup_kickstart(self, data):
"""Setup the kickstart data."""
(opts, host, path) = parse_nfs_url(self.url)
data.nfs.server = host
data.nfs.dir = path
data.nfs.opts = opts
data.nfs.seen = True
def generate_repo_configuration(self):
"""Generate RepoConfigurationData structure."""
return RepoConfigurationData.from_directory(self.install_tree_path)
@property
def url(self):
"""URL for mounting.
Combines server address, path, and options.
:rtype: str
"""
return self._url
def set_url(self, url):
"""Set all NFS values with a valid URL.
Fires all signals.
:param url: URL
:type url: str
"""
self._url = url
self.url_changed.emit()
log.debug("NFS URL is set to %s", self._url)
@property
def install_tree_path(self):
"""Path to the install tree.
Read only, and available only after the setup task finishes successfully.
:rtype: str
"""
return self._install_tree_path
def set_up_with_tasks(self):
"""Set up the installation source for installation.
:return: list of tasks required for the source setup
:rtype: [Task]
"""
task = SetUpNFSSourceTask(self._device_mount, self._iso_mount, self._url)
task.succeeded_signal.connect(lambda: self._handle_setup_task_result(task))
return [task]
def tear_down_with_tasks(self):
"""Tear down the installation source.
:return: list of tasks required for the source clean-up
:rtype: [TearDownMountTask]
"""
tasks = [
TearDownMountTask(self._iso_mount),
TearDownMountTask(self._device_mount),
]
return tasks
def _handle_setup_task_result(self, task):
result = task.get_result()
self._install_tree_path = result
log.debug("NFS install tree path is set to '%s'", self._install_tree_path)