Source code for pykickstart.commands.snapshot

# Jiri Konecny <>
# Copyright 2005, 2006, 2007, 2008, 2012, 2016, 2017 Red Hat, Inc.
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# See the GNU General Public License for more details.
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from pykickstart.base import BaseData, KickstartCommand
from pykickstart.errors import KickstartParseError
from pykickstart.options import KSOptionParser
from pykickstart.version import F26

from pykickstart.i18n import _

[docs]class F26_SnapshotData(BaseData): removedKeywords = BaseData.removedKeywords removedAttrs = BaseData.removedAttrs def __init__(self, *args, **kwargs): BaseData.__init__(self, *args, **kwargs) = kwargs.get("name", "") self.origin = kwargs.get("origin", "") self.when = kwargs.get("when", None) def __eq__(self, y): if not y: return False return ( == and self.origin == y.origin and self.when == y.when) def __ne__(self, y): return not self == y def _getArgsAsStr(self): retval = "" if self.when == SNAPSHOT_WHEN_POST_INSTALL: retval += "--when=post-install" elif self.when == SNAPSHOT_WHEN_PRE_INSTALL: retval += "--when=pre-install" return retval def __str__(self): retval = BaseData.__str__(self) retval += ("snapshot %s --name=%s %s" % (self.origin,, self._getArgsAsStr())) return retval.strip() + "\n"
[docs]class F26_Snapshot(KickstartCommand): removedKeywords = KickstartCommand.removedKeywords removedAttrs = KickstartCommand.removedAttrs def __init__(self, writePriority=140, *args, **kwargs): KickstartCommand.__init__(self, writePriority, *args, **kwargs) self.snapshotList = kwargs.get("snapshotList", []) self.whenMap = { "post-install": SNAPSHOT_WHEN_POST_INSTALL, "pre-install": SNAPSHOT_WHEN_PRE_INSTALL } self.op = self._getParser() def __str__(self): retval = "" for snapshot in self.snapshotList: retval += snapshot.__str__() return retval def _when_cb(self, value): if value.lower() in self.whenMap: return self.whenMap[value.lower()] else: msg = _("Invalid parameter to --when= argument: %s") % value raise KickstartParseError(msg, lineno=self.lineno) def _getParser(self): op = KSOptionParser(prog="snapshot", version=F26, description=""" Create an LVM snapshot for devices on an LVM thin pool.""") op.add_argument("origin", metavar="<originVG/originLV>", version=F26, help=""" Origin of the snapshot. The origin is specified as ``<VG>/<LV>``.""") op.add_argument("--name", metavar="<snapshot_name>", version=F26, required=True, help=""" Name of the newly created snapshot.""") # Show all possible options in meta message meta_msg = "<%s>" % ("|".join(self.whenMap.keys())) op.add_argument("--when", metavar=meta_msg, type=self._when_cb, version=F26, required=True, help=""" You can specify two possible values: ``pre-install`` and ``post-install``. When the ``pre-install`` value is used the snapshot is created before the installation but after the ``%%pre`` section is run. When the ``post-install`` value is used the snapshot is created after the installation is done and after the ``%%post`` section is run.""") return op
[docs] def parse(self, args): ns = self.op.parse_args(args=args, lineno=self.lineno) snap_data = self.dataClass() # pylint: disable=not-callable self.set_to_obj(ns, snap_data) snap_data.lineno = self.lineno # Check for duplicates if in [ for snap in self.dataList()]: msg = (_("Snapshot with the name %s has been already defined!") % raise KickstartParseError(msg, lineno=self.lineno) if snap_data.when is None: msg = _("Snapshot \"when\" parameter must be specified!") raise KickstartParseError(msg, lineno=self.lineno) groups = snap_data.origin.split('/') if len(groups) != 2 or len(groups[0]) == 0 or len(groups[1]) == 0: msg = (_("Snapshot origin %s must be specified by VG/LV!") % snap_data.origin) raise KickstartParseError(msg, lineno=self.lineno) # Check if value in a '--when' param is valid if snap_data.when != "" and snap_data.when not in self.whenMap.values(): msg = (_("Snapshot when param must have one of these values %s!") % self.whenMap.keys()) raise KickstartParseError(msg, lineno=self.lineno) return snap_data
[docs] def dataList(self): return self.snapshotList
@property def dataClass(self): return self.handler.SnapshotData