root / lib / objects.py @ a298fd5a
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# Copyright (C) 2006, 2007, 2008, 2009, 2010 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Transportable objects for Ganeti.
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This module provides small, mostly data-only objects which are safe to
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pass to and from external parties.
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"""
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# pylint: disable-msg=E0203,W0201
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# E0203: Access to member %r before its definition, since we use
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# objects.py which doesn't explicitely initialise its members
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# W0201: Attribute '%s' defined outside __init__
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import ConfigParser |
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import re |
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import copy |
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from cStringIO import StringIO |
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from ganeti import errors |
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from ganeti import constants |
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from socket import AF_INET |
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__all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance", |
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"OS", "Node", "NodeGroup", "Cluster", "FillDict"] |
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_TIMESTAMPS = ["ctime", "mtime"] |
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_UUID = ["uuid"]
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def FillDict(defaults_dict, custom_dict, skip_keys=None): |
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"""Basic function to apply settings on top a default dict.
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@type defaults_dict: dict
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@param defaults_dict: dictionary holding the default values
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@type custom_dict: dict
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@param custom_dict: dictionary holding customized value
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@type skip_keys: list
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@param skip_keys: which keys not to fill
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@rtype: dict
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@return: dict with the 'full' values
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"""
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ret_dict = copy.deepcopy(defaults_dict) |
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ret_dict.update(custom_dict) |
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if skip_keys:
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for k in skip_keys: |
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try:
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del ret_dict[k]
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except KeyError: |
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pass
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return ret_dict
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def UpgradeGroupedParams(target, defaults): |
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"""Update all groups for the target parameter.
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@type target: dict of dicts
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@param target: {group: {parameter: value}}
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@type defaults: dict
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@param defaults: default parameter values
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"""
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if target is None: |
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target = {constants.PP_DEFAULT: defaults} |
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else:
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for group in target: |
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target[group] = FillDict(defaults, target[group]) |
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return target
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class ConfigObject(object): |
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"""A generic config object.
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It has the following properties:
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- provides somewhat safe recursive unpickling and pickling for its classes
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- unset attributes which are defined in slots are always returned
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as None instead of raising an error
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Classes derived from this must always declare __slots__ (we use many
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config objects and the memory reduction is useful)
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"""
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__slots__ = [] |
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def __init__(self, **kwargs): |
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for k, v in kwargs.iteritems(): |
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setattr(self, k, v) |
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def __getattr__(self, name): |
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if name not in self._all_slots(): |
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raise AttributeError("Invalid object attribute %s.%s" % |
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(type(self).__name__, name)) |
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return None |
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def __setstate__(self, state): |
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slots = self._all_slots()
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for name in state: |
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if name in slots: |
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setattr(self, name, state[name]) |
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@classmethod
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def _all_slots(cls): |
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"""Compute the list of all declared slots for a class.
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"""
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slots = [] |
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for parent in cls.__mro__: |
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slots.extend(getattr(parent, "__slots__", [])) |
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return slots
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def ToDict(self): |
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"""Convert to a dict holding only standard python types.
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The generic routine just dumps all of this object's attributes in
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a dict. It does not work if the class has children who are
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ConfigObjects themselves (e.g. the nics list in an Instance), in
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which case the object should subclass the function in order to
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make sure all objects returned are only standard python types.
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"""
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result = {} |
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for name in self._all_slots(): |
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value = getattr(self, name, None) |
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if value is not None: |
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result[name] = value |
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return result
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__getstate__ = ToDict |
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@classmethod
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def FromDict(cls, val): |
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"""Create an object from a dictionary.
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This generic routine takes a dict, instantiates a new instance of
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the given class, and sets attributes based on the dict content.
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As for `ToDict`, this does not work if the class has children
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who are ConfigObjects themselves (e.g. the nics list in an
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Instance), in which case the object should subclass the function
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and alter the objects.
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"""
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if not isinstance(val, dict): |
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raise errors.ConfigurationError("Invalid object passed to FromDict:" |
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" expected dict, got %s" % type(val)) |
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val_str = dict([(str(k), v) for k, v in val.iteritems()]) |
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obj = cls(**val_str) # pylint: disable-msg=W0142
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return obj
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@staticmethod
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def _ContainerToDicts(container): |
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"""Convert the elements of a container to standard python types.
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This method converts a container with elements derived from
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ConfigData to standard python types. If the container is a dict,
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we don't touch the keys, only the values.
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"""
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if isinstance(container, dict): |
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ret = dict([(k, v.ToDict()) for k, v in container.iteritems()]) |
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elif isinstance(container, (list, tuple, set, frozenset)): |
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ret = [elem.ToDict() for elem in container] |
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else:
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raise TypeError("Invalid type %s passed to _ContainerToDicts" % |
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type(container))
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return ret
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@staticmethod
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def _ContainerFromDicts(source, c_type, e_type): |
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"""Convert a container from standard python types.
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This method converts a container with standard python types to
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ConfigData objects. If the container is a dict, we don't touch the
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keys, only the values.
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"""
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if not isinstance(c_type, type): |
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raise TypeError("Container type %s passed to _ContainerFromDicts is" |
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" not a type" % type(c_type)) |
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if source is None: |
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source = c_type() |
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if c_type is dict: |
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ret = dict([(k, e_type.FromDict(v)) for k, v in source.iteritems()]) |
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elif c_type in (list, tuple, set, frozenset): |
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ret = c_type([e_type.FromDict(elem) for elem in source]) |
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else:
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raise TypeError("Invalid container type %s passed to" |
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" _ContainerFromDicts" % c_type)
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return ret
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def Copy(self): |
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"""Makes a deep copy of the current object and its children.
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"""
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dict_form = self.ToDict()
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clone_obj = self.__class__.FromDict(dict_form)
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return clone_obj
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def __repr__(self): |
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"""Implement __repr__ for ConfigObjects."""
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return repr(self.ToDict()) |
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def UpgradeConfig(self): |
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"""Fill defaults for missing configuration values.
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This method will be called at configuration load time, and its
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implementation will be object dependent.
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"""
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pass
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class TaggableObject(ConfigObject): |
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"""An generic class supporting tags.
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"""
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__slots__ = ["tags"]
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VALID_TAG_RE = re.compile("^[\w.+*/:@-]+$")
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@classmethod
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def ValidateTag(cls, tag): |
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"""Check if a tag is valid.
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If the tag is invalid, an errors.TagError will be raised. The
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function has no return value.
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"""
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if not isinstance(tag, basestring): |
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raise errors.TagError("Invalid tag type (not a string)") |
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if len(tag) > constants.MAX_TAG_LEN: |
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raise errors.TagError("Tag too long (>%d characters)" % |
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constants.MAX_TAG_LEN) |
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if not tag: |
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raise errors.TagError("Tags cannot be empty") |
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if not cls.VALID_TAG_RE.match(tag): |
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raise errors.TagError("Tag contains invalid characters") |
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def GetTags(self): |
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"""Return the tags list.
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"""
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tags = getattr(self, "tags", None) |
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if tags is None: |
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tags = self.tags = set() |
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return tags
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def AddTag(self, tag): |
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"""Add a new tag.
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"""
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self.ValidateTag(tag)
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tags = self.GetTags()
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if len(tags) >= constants.MAX_TAGS_PER_OBJ: |
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raise errors.TagError("Too many tags") |
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self.GetTags().add(tag)
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def RemoveTag(self, tag): |
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"""Remove a tag.
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"""
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self.ValidateTag(tag)
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tags = self.GetTags()
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try:
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tags.remove(tag) |
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except KeyError: |
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raise errors.TagError("Tag not found") |
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def ToDict(self): |
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"""Taggable-object-specific conversion to standard python types.
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This replaces the tags set with a list.
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"""
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bo = super(TaggableObject, self).ToDict() |
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tags = bo.get("tags", None) |
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if isinstance(tags, set): |
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bo["tags"] = list(tags) |
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return bo
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@classmethod
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def FromDict(cls, val): |
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"""Custom function for instances.
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"""
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obj = super(TaggableObject, cls).FromDict(val)
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if hasattr(obj, "tags") and isinstance(obj.tags, list): |
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obj.tags = set(obj.tags)
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return obj
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class ConfigData(ConfigObject): |
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"""Top-level config object."""
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__slots__ = [ |
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"version",
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"cluster",
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"nodes",
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"nodegroups",
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"instances",
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"serial_no",
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] + _TIMESTAMPS |
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def ToDict(self): |
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"""Custom function for top-level config data.
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This just replaces the list of instances, nodes and the cluster
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with standard python types.
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"""
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mydict = super(ConfigData, self).ToDict() |
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mydict["cluster"] = mydict["cluster"].ToDict() |
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for key in "nodes", "instances", "nodegroups": |
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mydict[key] = self._ContainerToDicts(mydict[key])
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return mydict
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@classmethod
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def FromDict(cls, val): |
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"""Custom function for top-level config data
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"""
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obj = super(ConfigData, cls).FromDict(val)
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obj.cluster = Cluster.FromDict(obj.cluster) |
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obj.nodes = cls._ContainerFromDicts(obj.nodes, dict, Node)
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obj.instances = cls._ContainerFromDicts(obj.instances, dict, Instance)
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obj.nodegroups = cls._ContainerFromDicts(obj.nodegroups, dict, NodeGroup)
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return obj
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def HasAnyDiskOfType(self, dev_type): |
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"""Check if in there is at disk of the given type in the configuration.
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@type dev_type: L{constants.LDS_BLOCK}
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@param dev_type: the type to look for
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@rtype: boolean
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@return: boolean indicating if a disk of the given type was found or not
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"""
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for instance in self.instances.values(): |
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for disk in instance.disks: |
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if disk.IsBasedOnDiskType(dev_type):
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return True |
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return False |
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def UpgradeConfig(self): |
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"""Fill defaults for missing configuration values.
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"""
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self.cluster.UpgradeConfig()
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for node in self.nodes.values(): |
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node.UpgradeConfig() |
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for instance in self.instances.values(): |
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instance.UpgradeConfig() |
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if self.nodegroups is None: |
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self.nodegroups = {}
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for nodegroup in self.nodegroups.values(): |
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nodegroup.UpgradeConfig() |
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if self.cluster.drbd_usermode_helper is None: |
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# To decide if we set an helper let's check if at least one instance has
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# a DRBD disk. This does not cover all the possible scenarios but it
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# gives a good approximation.
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if self.HasAnyDiskOfType(constants.LD_DRBD8): |
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self.cluster.drbd_usermode_helper = constants.DEFAULT_DRBD_HELPER
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class NIC(ConfigObject): |
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"""Config object representing a network card."""
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__slots__ = ["mac", "ip", "bridge", "nicparams"] |
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@classmethod
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def CheckParameterSyntax(cls, nicparams): |
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"""Check the given parameters for validity.
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@type nicparams: dict
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@param nicparams: dictionary with parameter names/value
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@raise errors.ConfigurationError: when a parameter is not valid
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"""
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if nicparams[constants.NIC_MODE] not in constants.NIC_VALID_MODES: |
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err = "Invalid nic mode: %s" % nicparams[constants.NIC_MODE]
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raise errors.ConfigurationError(err)
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if (nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED and |
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not nicparams[constants.NIC_LINK]):
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err = "Missing bridged nic link"
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raise errors.ConfigurationError(err)
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def UpgradeConfig(self): |
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"""Fill defaults for missing configuration values.
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"""
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if self.nicparams is None: |
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self.nicparams = {}
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if self.bridge is not None: |
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self.nicparams[constants.NIC_MODE] = constants.NIC_MODE_BRIDGED
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self.nicparams[constants.NIC_LINK] = self.bridge |
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# bridge is no longer used it 2.1. The slot is left there to support
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# upgrading, but can be removed once upgrades to the current version
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# straight from 2.0 are deprecated.
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if self.bridge is not None: |
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self.bridge = None |
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class Disk(ConfigObject): |
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"""Config object representing a block device."""
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__slots__ = ["dev_type", "logical_id", "physical_id", |
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"children", "iv_name", "size", "mode"] |
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def CreateOnSecondary(self): |
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"""Test if this device needs to be created on a secondary node."""
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return self.dev_type in (constants.LD_DRBD8, constants.LD_LV) |
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def AssembleOnSecondary(self): |
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"""Test if this device needs to be assembled on a secondary node."""
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return self.dev_type in (constants.LD_DRBD8, constants.LD_LV) |
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def OpenOnSecondary(self): |
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"""Test if this device needs to be opened on a secondary node."""
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return self.dev_type in (constants.LD_LV,) |
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def StaticDevPath(self): |
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"""Return the device path if this device type has a static one.
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Some devices (LVM for example) live always at the same /dev/ path,
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irrespective of their status. For such devices, we return this
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path, for others we return None.
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@warning: The path returned is not a normalized pathname; callers
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should check that it is a valid path.
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"""
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if self.dev_type == constants.LD_LV: |
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return "/dev/%s/%s" % (self.logical_id[0], self.logical_id[1]) |
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return None |
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def ChildrenNeeded(self): |
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"""Compute the needed number of children for activation.
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This method will return either -1 (all children) or a positive
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number denoting the minimum number of children needed for
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activation (only mirrored devices will usually return >=0).
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Currently, only DRBD8 supports diskless activation (therefore we
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return 0), for all other we keep the previous semantics and return
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-1.
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"""
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if self.dev_type == constants.LD_DRBD8: |
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return 0 |
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return -1 |
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def IsBasedOnDiskType(self, dev_type): |
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"""Check if the disk or its children are based on the given type.
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@type dev_type: L{constants.LDS_BLOCK}
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@param dev_type: the type to look for
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@rtype: boolean
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@return: boolean indicating if a device of the given type was found or not
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"""
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if self.children: |
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for child in self.children: |
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if child.IsBasedOnDiskType(dev_type):
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return True |
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return self.dev_type == dev_type |
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def GetNodes(self, node): |
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"""This function returns the nodes this device lives on.
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Given the node on which the parent of the device lives on (or, in
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case of a top-level device, the primary node of the devices'
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instance), this function will return a list of nodes on which this
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devices needs to (or can) be assembled.
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"""
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if self.dev_type in [constants.LD_LV, constants.LD_FILE]: |
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result = [node] |
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elif self.dev_type in constants.LDS_DRBD: |
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result = [self.logical_id[0], self.logical_id[1]] |
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if node not in result: |
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raise errors.ConfigurationError("DRBD device passed unknown node") |
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else:
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raise errors.ProgrammerError("Unhandled device type %s" % self.dev_type) |
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return result
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def ComputeNodeTree(self, parent_node): |
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"""Compute the node/disk tree for this disk and its children.
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This method, given the node on which the parent disk lives, will
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return the list of all (node, disk) pairs which describe the disk
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tree in the most compact way. For example, a drbd/lvm stack
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will be returned as (primary_node, drbd) and (secondary_node, drbd)
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which represents all the top-level devices on the nodes.
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"""
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my_nodes = self.GetNodes(parent_node)
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result = [(node, self) for node in my_nodes] |
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if not self.children: |
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# leaf device
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return result
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for node in my_nodes: |
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for child in self.children: |
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child_result = child.ComputeNodeTree(node) |
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if len(child_result) == 1: |
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# child (and all its descendants) is simple, doesn't split
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# over multiple hosts, so we don't need to describe it, our
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# own entry for this node describes it completely
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continue
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else:
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534 |
# check if child nodes differ from my nodes; note that
|
535 |
# subdisk can differ from the child itself, and be instead
|
536 |
# one of its descendants
|
537 |
for subnode, subdisk in child_result: |
538 |
if subnode not in my_nodes: |
539 |
result.append((subnode, subdisk)) |
540 |
# otherwise child is under our own node, so we ignore this
|
541 |
# entry (but probably the other results in the list will
|
542 |
# be different)
|
543 |
return result
|
544 |
|
545 |
def RecordGrow(self, amount): |
546 |
"""Update the size of this disk after growth.
|
547 |
|
548 |
This method recurses over the disks's children and updates their
|
549 |
size correspondigly. The method needs to be kept in sync with the
|
550 |
actual algorithms from bdev.
|
551 |
|
552 |
"""
|
553 |
if self.dev_type == constants.LD_LV or self.dev_type == constants.LD_FILE: |
554 |
self.size += amount
|
555 |
elif self.dev_type == constants.LD_DRBD8: |
556 |
if self.children: |
557 |
self.children[0].RecordGrow(amount) |
558 |
self.size += amount
|
559 |
else:
|
560 |
raise errors.ProgrammerError("Disk.RecordGrow called for unsupported" |
561 |
" disk type %s" % self.dev_type) |
562 |
|
563 |
def UnsetSize(self): |
564 |
"""Sets recursively the size to zero for the disk and its children.
|
565 |
|
566 |
"""
|
567 |
if self.children: |
568 |
for child in self.children: |
569 |
child.UnsetSize() |
570 |
self.size = 0 |
571 |
|
572 |
def SetPhysicalID(self, target_node, nodes_ip): |
573 |
"""Convert the logical ID to the physical ID.
|
574 |
|
575 |
This is used only for drbd, which needs ip/port configuration.
|
576 |
|
577 |
The routine descends down and updates its children also, because
|
578 |
this helps when the only the top device is passed to the remote
|
579 |
node.
|
580 |
|
581 |
Arguments:
|
582 |
- target_node: the node we wish to configure for
|
583 |
- nodes_ip: a mapping of node name to ip
|
584 |
|
585 |
The target_node must exist in in nodes_ip, and must be one of the
|
586 |
nodes in the logical ID for each of the DRBD devices encountered
|
587 |
in the disk tree.
|
588 |
|
589 |
"""
|
590 |
if self.children: |
591 |
for child in self.children: |
592 |
child.SetPhysicalID(target_node, nodes_ip) |
593 |
|
594 |
if self.logical_id is None and self.physical_id is not None: |
595 |
return
|
596 |
if self.dev_type in constants.LDS_DRBD: |
597 |
pnode, snode, port, pminor, sminor, secret = self.logical_id
|
598 |
if target_node not in (pnode, snode): |
599 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
600 |
target_node) |
601 |
pnode_ip = nodes_ip.get(pnode, None)
|
602 |
snode_ip = nodes_ip.get(snode, None)
|
603 |
if pnode_ip is None or snode_ip is None: |
604 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
605 |
" for %s" % str(self)) |
606 |
p_data = (pnode_ip, port) |
607 |
s_data = (snode_ip, port) |
608 |
if pnode == target_node:
|
609 |
self.physical_id = p_data + s_data + (pminor, secret)
|
610 |
else: # it must be secondary, we tested above |
611 |
self.physical_id = s_data + p_data + (sminor, secret)
|
612 |
else:
|
613 |
self.physical_id = self.logical_id |
614 |
return
|
615 |
|
616 |
def ToDict(self): |
617 |
"""Disk-specific conversion to standard python types.
|
618 |
|
619 |
This replaces the children lists of objects with lists of
|
620 |
standard python types.
|
621 |
|
622 |
"""
|
623 |
bo = super(Disk, self).ToDict() |
624 |
|
625 |
for attr in ("children",): |
626 |
alist = bo.get(attr, None)
|
627 |
if alist:
|
628 |
bo[attr] = self._ContainerToDicts(alist)
|
629 |
return bo
|
630 |
|
631 |
@classmethod
|
632 |
def FromDict(cls, val): |
633 |
"""Custom function for Disks
|
634 |
|
635 |
"""
|
636 |
obj = super(Disk, cls).FromDict(val)
|
637 |
if obj.children:
|
638 |
obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
|
639 |
if obj.logical_id and isinstance(obj.logical_id, list): |
640 |
obj.logical_id = tuple(obj.logical_id)
|
641 |
if obj.physical_id and isinstance(obj.physical_id, list): |
642 |
obj.physical_id = tuple(obj.physical_id)
|
643 |
if obj.dev_type in constants.LDS_DRBD: |
644 |
# we need a tuple of length six here
|
645 |
if len(obj.logical_id) < 6: |
646 |
obj.logical_id += (None,) * (6 - len(obj.logical_id)) |
647 |
return obj
|
648 |
|
649 |
def __str__(self): |
650 |
"""Custom str() formatter for disks.
|
651 |
|
652 |
"""
|
653 |
if self.dev_type == constants.LD_LV: |
654 |
val = "<LogicalVolume(/dev/%s/%s" % self.logical_id |
655 |
elif self.dev_type in constants.LDS_DRBD: |
656 |
node_a, node_b, port, minor_a, minor_b = self.logical_id[:5] |
657 |
val = "<DRBD8("
|
658 |
if self.physical_id is None: |
659 |
phy = "unconfigured"
|
660 |
else:
|
661 |
phy = ("configured as %s:%s %s:%s" %
|
662 |
(self.physical_id[0], self.physical_id[1], |
663 |
self.physical_id[2], self.physical_id[3])) |
664 |
|
665 |
val += ("hosts=%s/%d-%s/%d, port=%s, %s, " %
|
666 |
(node_a, minor_a, node_b, minor_b, port, phy)) |
667 |
if self.children and self.children.count(None) == 0: |
668 |
val += "backend=%s, metadev=%s" % (self.children[0], self.children[1]) |
669 |
else:
|
670 |
val += "no local storage"
|
671 |
else:
|
672 |
val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
|
673 |
(self.dev_type, self.logical_id, self.physical_id, self.children)) |
674 |
if self.iv_name is None: |
675 |
val += ", not visible"
|
676 |
else:
|
677 |
val += ", visible as /dev/%s" % self.iv_name |
678 |
if isinstance(self.size, int): |
679 |
val += ", size=%dm)>" % self.size |
680 |
else:
|
681 |
val += ", size='%s')>" % (self.size,) |
682 |
return val
|
683 |
|
684 |
def Verify(self): |
685 |
"""Checks that this disk is correctly configured.
|
686 |
|
687 |
"""
|
688 |
all_errors = [] |
689 |
if self.mode not in constants.DISK_ACCESS_SET: |
690 |
all_errors.append("Disk access mode '%s' is invalid" % (self.mode, )) |
691 |
return all_errors
|
692 |
|
693 |
def UpgradeConfig(self): |
694 |
"""Fill defaults for missing configuration values.
|
695 |
|
696 |
"""
|
697 |
if self.children: |
698 |
for child in self.children: |
699 |
child.UpgradeConfig() |
700 |
# add here config upgrade for this disk
|
701 |
|
702 |
|
703 |
class Instance(TaggableObject): |
704 |
"""Config object representing an instance."""
|
705 |
__slots__ = [ |
706 |
"name",
|
707 |
"primary_node",
|
708 |
"os",
|
709 |
"hypervisor",
|
710 |
"hvparams",
|
711 |
"beparams",
|
712 |
"osparams",
|
713 |
"admin_up",
|
714 |
"nics",
|
715 |
"disks",
|
716 |
"disk_template",
|
717 |
"network_port",
|
718 |
"serial_no",
|
719 |
] + _TIMESTAMPS + _UUID |
720 |
|
721 |
def _ComputeSecondaryNodes(self): |
722 |
"""Compute the list of secondary nodes.
|
723 |
|
724 |
This is a simple wrapper over _ComputeAllNodes.
|
725 |
|
726 |
"""
|
727 |
all_nodes = set(self._ComputeAllNodes()) |
728 |
all_nodes.discard(self.primary_node)
|
729 |
return tuple(all_nodes) |
730 |
|
731 |
secondary_nodes = property(_ComputeSecondaryNodes, None, None, |
732 |
"List of secondary nodes")
|
733 |
|
734 |
def _ComputeAllNodes(self): |
735 |
"""Compute the list of all nodes.
|
736 |
|
737 |
Since the data is already there (in the drbd disks), keeping it as
|
738 |
a separate normal attribute is redundant and if not properly
|
739 |
synchronised can cause problems. Thus it's better to compute it
|
740 |
dynamically.
|
741 |
|
742 |
"""
|
743 |
def _Helper(nodes, device): |
744 |
"""Recursively computes nodes given a top device."""
|
745 |
if device.dev_type in constants.LDS_DRBD: |
746 |
nodea, nodeb = device.logical_id[:2]
|
747 |
nodes.add(nodea) |
748 |
nodes.add(nodeb) |
749 |
if device.children:
|
750 |
for child in device.children: |
751 |
_Helper(nodes, child) |
752 |
|
753 |
all_nodes = set()
|
754 |
all_nodes.add(self.primary_node)
|
755 |
for device in self.disks: |
756 |
_Helper(all_nodes, device) |
757 |
return tuple(all_nodes) |
758 |
|
759 |
all_nodes = property(_ComputeAllNodes, None, None, |
760 |
"List of all nodes of the instance")
|
761 |
|
762 |
def MapLVsByNode(self, lvmap=None, devs=None, node=None): |
763 |
"""Provide a mapping of nodes to LVs this instance owns.
|
764 |
|
765 |
This function figures out what logical volumes should belong on
|
766 |
which nodes, recursing through a device tree.
|
767 |
|
768 |
@param lvmap: optional dictionary to receive the
|
769 |
'node' : ['lv', ...] data.
|
770 |
|
771 |
@return: None if lvmap arg is given, otherwise, a dictionary
|
772 |
of the form { 'nodename' : ['volume1', 'volume2', ...], ... }
|
773 |
|
774 |
"""
|
775 |
if node == None: |
776 |
node = self.primary_node
|
777 |
|
778 |
if lvmap is None: |
779 |
lvmap = { node : [] } |
780 |
ret = lvmap |
781 |
else:
|
782 |
if not node in lvmap: |
783 |
lvmap[node] = [] |
784 |
ret = None
|
785 |
|
786 |
if not devs: |
787 |
devs = self.disks
|
788 |
|
789 |
for dev in devs: |
790 |
if dev.dev_type == constants.LD_LV:
|
791 |
lvmap[node].append(dev.logical_id[1])
|
792 |
|
793 |
elif dev.dev_type in constants.LDS_DRBD: |
794 |
if dev.children:
|
795 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0]) |
796 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1]) |
797 |
|
798 |
elif dev.children:
|
799 |
self.MapLVsByNode(lvmap, dev.children, node)
|
800 |
|
801 |
return ret
|
802 |
|
803 |
def FindDisk(self, idx): |
804 |
"""Find a disk given having a specified index.
|
805 |
|
806 |
This is just a wrapper that does validation of the index.
|
807 |
|
808 |
@type idx: int
|
809 |
@param idx: the disk index
|
810 |
@rtype: L{Disk}
|
811 |
@return: the corresponding disk
|
812 |
@raise errors.OpPrereqError: when the given index is not valid
|
813 |
|
814 |
"""
|
815 |
try:
|
816 |
idx = int(idx)
|
817 |
return self.disks[idx] |
818 |
except (TypeError, ValueError), err: |
819 |
raise errors.OpPrereqError("Invalid disk index: '%s'" % str(err), |
820 |
errors.ECODE_INVAL) |
821 |
except IndexError: |
822 |
raise errors.OpPrereqError("Invalid disk index: %d (instace has disks" |
823 |
" 0 to %d" % (idx, len(self.disks)), |
824 |
errors.ECODE_INVAL) |
825 |
|
826 |
def ToDict(self): |
827 |
"""Instance-specific conversion to standard python types.
|
828 |
|
829 |
This replaces the children lists of objects with lists of standard
|
830 |
python types.
|
831 |
|
832 |
"""
|
833 |
bo = super(Instance, self).ToDict() |
834 |
|
835 |
for attr in "nics", "disks": |
836 |
alist = bo.get(attr, None)
|
837 |
if alist:
|
838 |
nlist = self._ContainerToDicts(alist)
|
839 |
else:
|
840 |
nlist = [] |
841 |
bo[attr] = nlist |
842 |
return bo
|
843 |
|
844 |
@classmethod
|
845 |
def FromDict(cls, val): |
846 |
"""Custom function for instances.
|
847 |
|
848 |
"""
|
849 |
obj = super(Instance, cls).FromDict(val)
|
850 |
obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
|
851 |
obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
|
852 |
return obj
|
853 |
|
854 |
def UpgradeConfig(self): |
855 |
"""Fill defaults for missing configuration values.
|
856 |
|
857 |
"""
|
858 |
for nic in self.nics: |
859 |
nic.UpgradeConfig() |
860 |
for disk in self.disks: |
861 |
disk.UpgradeConfig() |
862 |
if self.hvparams: |
863 |
for key in constants.HVC_GLOBALS: |
864 |
try:
|
865 |
del self.hvparams[key] |
866 |
except KeyError: |
867 |
pass
|
868 |
if self.osparams is None: |
869 |
self.osparams = {}
|
870 |
|
871 |
|
872 |
class OS(ConfigObject): |
873 |
"""Config object representing an operating system.
|
874 |
|
875 |
@type supported_parameters: list
|
876 |
@ivar supported_parameters: a list of tuples, name and description,
|
877 |
containing the supported parameters by this OS
|
878 |
|
879 |
@type VARIANT_DELIM: string
|
880 |
@cvar VARIANT_DELIM: the variant delimiter
|
881 |
|
882 |
"""
|
883 |
__slots__ = [ |
884 |
"name",
|
885 |
"path",
|
886 |
"api_versions",
|
887 |
"create_script",
|
888 |
"export_script",
|
889 |
"import_script",
|
890 |
"rename_script",
|
891 |
"verify_script",
|
892 |
"supported_variants",
|
893 |
"supported_parameters",
|
894 |
] |
895 |
|
896 |
VARIANT_DELIM = "+"
|
897 |
|
898 |
@classmethod
|
899 |
def SplitNameVariant(cls, name): |
900 |
"""Splits the name into the proper name and variant.
|
901 |
|
902 |
@param name: the OS (unprocessed) name
|
903 |
@rtype: list
|
904 |
@return: a list of two elements; if the original name didn't
|
905 |
contain a variant, it's returned as an empty string
|
906 |
|
907 |
"""
|
908 |
nv = name.split(cls.VARIANT_DELIM, 1)
|
909 |
if len(nv) == 1: |
910 |
nv.append("")
|
911 |
return nv
|
912 |
|
913 |
@classmethod
|
914 |
def GetName(cls, name): |
915 |
"""Returns the proper name of the os (without the variant).
|
916 |
|
917 |
@param name: the OS (unprocessed) name
|
918 |
|
919 |
"""
|
920 |
return cls.SplitNameVariant(name)[0] |
921 |
|
922 |
@classmethod
|
923 |
def GetVariant(cls, name): |
924 |
"""Returns the variant the os (without the base name).
|
925 |
|
926 |
@param name: the OS (unprocessed) name
|
927 |
|
928 |
"""
|
929 |
return cls.SplitNameVariant(name)[1] |
930 |
|
931 |
|
932 |
class Node(TaggableObject): |
933 |
"""Config object representing a node."""
|
934 |
__slots__ = [ |
935 |
"name",
|
936 |
"primary_ip",
|
937 |
"secondary_ip",
|
938 |
"serial_no",
|
939 |
"master_candidate",
|
940 |
"offline",
|
941 |
"drained",
|
942 |
"group",
|
943 |
"master_capable",
|
944 |
"vm_capable",
|
945 |
"ndparams",
|
946 |
] + _TIMESTAMPS + _UUID |
947 |
|
948 |
def UpgradeConfig(self): |
949 |
"""Fill defaults for missing configuration values.
|
950 |
|
951 |
"""
|
952 |
# pylint: disable-msg=E0203
|
953 |
# because these are "defined" via slots, not manually
|
954 |
if self.master_capable is None: |
955 |
self.master_capable = True |
956 |
|
957 |
if self.vm_capable is None: |
958 |
self.vm_capable = True |
959 |
|
960 |
if self.ndparams is None: |
961 |
self.ndparams = {}
|
962 |
|
963 |
|
964 |
class NodeGroup(ConfigObject): |
965 |
"""Config object representing a node group."""
|
966 |
__slots__ = [ |
967 |
"name",
|
968 |
"members",
|
969 |
"ndparams",
|
970 |
] + _TIMESTAMPS + _UUID |
971 |
|
972 |
def ToDict(self): |
973 |
"""Custom function for nodegroup.
|
974 |
|
975 |
This discards the members object, which gets recalculated and is only kept
|
976 |
in memory.
|
977 |
|
978 |
"""
|
979 |
mydict = super(NodeGroup, self).ToDict() |
980 |
del mydict["members"] |
981 |
return mydict
|
982 |
|
983 |
@classmethod
|
984 |
def FromDict(cls, val): |
985 |
"""Custom function for nodegroup.
|
986 |
|
987 |
The members slot is initialized to an empty list, upon deserialization.
|
988 |
|
989 |
"""
|
990 |
obj = super(NodeGroup, cls).FromDict(val)
|
991 |
obj.members = [] |
992 |
return obj
|
993 |
|
994 |
def UpgradeConfig(self): |
995 |
"""Fill defaults for missing configuration values.
|
996 |
|
997 |
"""
|
998 |
if self.ndparams is None: |
999 |
self.ndparams = {}
|
1000 |
|
1001 |
def FillND(self, node): |
1002 |
"""Return filled out ndparams for L{object.Node}
|
1003 |
|
1004 |
@type node: L{objects.Node}
|
1005 |
@param node: A Node object to fill
|
1006 |
@return a copy of the node's ndparams with defaults filled
|
1007 |
|
1008 |
"""
|
1009 |
return self.SimpleFillND(node.ndparams) |
1010 |
|
1011 |
def SimpleFillND(self, ndparams): |
1012 |
"""Fill a given ndparams dict with defaults.
|
1013 |
|
1014 |
@type ndparams: dict
|
1015 |
@param ndparams: the dict to fill
|
1016 |
@rtype: dict
|
1017 |
@return: a copy of the passed in ndparams with missing keys filled
|
1018 |
from the cluster defaults
|
1019 |
|
1020 |
"""
|
1021 |
return FillDict(self.ndparams, ndparams) |
1022 |
|
1023 |
|
1024 |
class Cluster(TaggableObject): |
1025 |
"""Config object representing the cluster."""
|
1026 |
__slots__ = [ |
1027 |
"serial_no",
|
1028 |
"rsahostkeypub",
|
1029 |
"highest_used_port",
|
1030 |
"tcpudp_port_pool",
|
1031 |
"mac_prefix",
|
1032 |
"volume_group_name",
|
1033 |
"reserved_lvs",
|
1034 |
"drbd_usermode_helper",
|
1035 |
"default_bridge",
|
1036 |
"default_hypervisor",
|
1037 |
"master_node",
|
1038 |
"master_ip",
|
1039 |
"master_netdev",
|
1040 |
"cluster_name",
|
1041 |
"file_storage_dir",
|
1042 |
"enabled_hypervisors",
|
1043 |
"hvparams",
|
1044 |
"os_hvp",
|
1045 |
"beparams",
|
1046 |
"osparams",
|
1047 |
"nicparams",
|
1048 |
"ndparams",
|
1049 |
"candidate_pool_size",
|
1050 |
"modify_etc_hosts",
|
1051 |
"modify_ssh_setup",
|
1052 |
"maintain_node_health",
|
1053 |
"uid_pool",
|
1054 |
"default_iallocator",
|
1055 |
"hidden_os",
|
1056 |
"blacklisted_os",
|
1057 |
"primary_ip_family",
|
1058 |
"prealloc_wipe_disks",
|
1059 |
] + _TIMESTAMPS + _UUID |
1060 |
|
1061 |
def UpgradeConfig(self): |
1062 |
"""Fill defaults for missing configuration values.
|
1063 |
|
1064 |
"""
|
1065 |
# pylint: disable-msg=E0203
|
1066 |
# because these are "defined" via slots, not manually
|
1067 |
if self.hvparams is None: |
1068 |
self.hvparams = constants.HVC_DEFAULTS
|
1069 |
else:
|
1070 |
for hypervisor in self.hvparams: |
1071 |
self.hvparams[hypervisor] = FillDict(
|
1072 |
constants.HVC_DEFAULTS[hypervisor], self.hvparams[hypervisor])
|
1073 |
|
1074 |
if self.os_hvp is None: |
1075 |
self.os_hvp = {}
|
1076 |
|
1077 |
# osparams added before 2.2
|
1078 |
if self.osparams is None: |
1079 |
self.osparams = {}
|
1080 |
|
1081 |
if self.ndparams is None: |
1082 |
self.ndparams = constants.NDC_DEFAULTS
|
1083 |
|
1084 |
self.beparams = UpgradeGroupedParams(self.beparams, |
1085 |
constants.BEC_DEFAULTS) |
1086 |
migrate_default_bridge = not self.nicparams |
1087 |
self.nicparams = UpgradeGroupedParams(self.nicparams, |
1088 |
constants.NICC_DEFAULTS) |
1089 |
if migrate_default_bridge:
|
1090 |
self.nicparams[constants.PP_DEFAULT][constants.NIC_LINK] = \
|
1091 |
self.default_bridge
|
1092 |
|
1093 |
if self.modify_etc_hosts is None: |
1094 |
self.modify_etc_hosts = True |
1095 |
|
1096 |
if self.modify_ssh_setup is None: |
1097 |
self.modify_ssh_setup = True |
1098 |
|
1099 |
# default_bridge is no longer used it 2.1. The slot is left there to
|
1100 |
# support auto-upgrading. It can be removed once we decide to deprecate
|
1101 |
# upgrading straight from 2.0.
|
1102 |
if self.default_bridge is not None: |
1103 |
self.default_bridge = None |
1104 |
|
1105 |
# default_hypervisor is just the first enabled one in 2.1. This slot and
|
1106 |
# code can be removed once upgrading straight from 2.0 is deprecated.
|
1107 |
if self.default_hypervisor is not None: |
1108 |
self.enabled_hypervisors = ([self.default_hypervisor] + |
1109 |
[hvname for hvname in self.enabled_hypervisors |
1110 |
if hvname != self.default_hypervisor]) |
1111 |
self.default_hypervisor = None |
1112 |
|
1113 |
# maintain_node_health added after 2.1.1
|
1114 |
if self.maintain_node_health is None: |
1115 |
self.maintain_node_health = False |
1116 |
|
1117 |
if self.uid_pool is None: |
1118 |
self.uid_pool = []
|
1119 |
|
1120 |
if self.default_iallocator is None: |
1121 |
self.default_iallocator = "" |
1122 |
|
1123 |
# reserved_lvs added before 2.2
|
1124 |
if self.reserved_lvs is None: |
1125 |
self.reserved_lvs = []
|
1126 |
|
1127 |
# hidden and blacklisted operating systems added before 2.2.1
|
1128 |
if self.hidden_os is None: |
1129 |
self.hidden_os = []
|
1130 |
|
1131 |
if self.blacklisted_os is None: |
1132 |
self.blacklisted_os = []
|
1133 |
|
1134 |
# primary_ip_family added before 2.3
|
1135 |
if self.primary_ip_family is None: |
1136 |
self.primary_ip_family = AF_INET
|
1137 |
|
1138 |
if self.prealloc_wipe_disks is None: |
1139 |
self.prealloc_wipe_disks = False |
1140 |
|
1141 |
def ToDict(self): |
1142 |
"""Custom function for cluster.
|
1143 |
|
1144 |
"""
|
1145 |
mydict = super(Cluster, self).ToDict() |
1146 |
mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool) |
1147 |
return mydict
|
1148 |
|
1149 |
@classmethod
|
1150 |
def FromDict(cls, val): |
1151 |
"""Custom function for cluster.
|
1152 |
|
1153 |
"""
|
1154 |
obj = super(Cluster, cls).FromDict(val)
|
1155 |
if not isinstance(obj.tcpudp_port_pool, set): |
1156 |
obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
|
1157 |
return obj
|
1158 |
|
1159 |
def GetHVDefaults(self, hypervisor, os_name=None, skip_keys=None): |
1160 |
"""Get the default hypervisor parameters for the cluster.
|
1161 |
|
1162 |
@param hypervisor: the hypervisor name
|
1163 |
@param os_name: if specified, we'll also update the defaults for this OS
|
1164 |
@param skip_keys: if passed, list of keys not to use
|
1165 |
@return: the defaults dict
|
1166 |
|
1167 |
"""
|
1168 |
if skip_keys is None: |
1169 |
skip_keys = [] |
1170 |
|
1171 |
fill_stack = [self.hvparams.get(hypervisor, {})]
|
1172 |
if os_name is not None: |
1173 |
os_hvp = self.os_hvp.get(os_name, {}).get(hypervisor, {})
|
1174 |
fill_stack.append(os_hvp) |
1175 |
|
1176 |
ret_dict = {} |
1177 |
for o_dict in fill_stack: |
1178 |
ret_dict = FillDict(ret_dict, o_dict, skip_keys=skip_keys) |
1179 |
|
1180 |
return ret_dict
|
1181 |
|
1182 |
def SimpleFillHV(self, hv_name, os_name, hvparams, skip_globals=False): |
1183 |
"""Fill a given hvparams dict with cluster defaults.
|
1184 |
|
1185 |
@type hv_name: string
|
1186 |
@param hv_name: the hypervisor to use
|
1187 |
@type os_name: string
|
1188 |
@param os_name: the OS to use for overriding the hypervisor defaults
|
1189 |
@type skip_globals: boolean
|
1190 |
@param skip_globals: if True, the global hypervisor parameters will
|
1191 |
not be filled
|
1192 |
@rtype: dict
|
1193 |
@return: a copy of the given hvparams with missing keys filled from
|
1194 |
the cluster defaults
|
1195 |
|
1196 |
"""
|
1197 |
if skip_globals:
|
1198 |
skip_keys = constants.HVC_GLOBALS |
1199 |
else:
|
1200 |
skip_keys = [] |
1201 |
|
1202 |
def_dict = self.GetHVDefaults(hv_name, os_name, skip_keys=skip_keys)
|
1203 |
return FillDict(def_dict, hvparams, skip_keys=skip_keys)
|
1204 |
|
1205 |
def FillHV(self, instance, skip_globals=False): |
1206 |
"""Fill an instance's hvparams dict with cluster defaults.
|
1207 |
|
1208 |
@type instance: L{objects.Instance}
|
1209 |
@param instance: the instance parameter to fill
|
1210 |
@type skip_globals: boolean
|
1211 |
@param skip_globals: if True, the global hypervisor parameters will
|
1212 |
not be filled
|
1213 |
@rtype: dict
|
1214 |
@return: a copy of the instance's hvparams with missing keys filled from
|
1215 |
the cluster defaults
|
1216 |
|
1217 |
"""
|
1218 |
return self.SimpleFillHV(instance.hypervisor, instance.os, |
1219 |
instance.hvparams, skip_globals) |
1220 |
|
1221 |
def SimpleFillBE(self, beparams): |
1222 |
"""Fill a given beparams dict with cluster defaults.
|
1223 |
|
1224 |
@type beparams: dict
|
1225 |
@param beparams: the dict to fill
|
1226 |
@rtype: dict
|
1227 |
@return: a copy of the passed in beparams with missing keys filled
|
1228 |
from the cluster defaults
|
1229 |
|
1230 |
"""
|
1231 |
return FillDict(self.beparams.get(constants.PP_DEFAULT, {}), beparams) |
1232 |
|
1233 |
def FillBE(self, instance): |
1234 |
"""Fill an instance's beparams dict with cluster defaults.
|
1235 |
|
1236 |
@type instance: L{objects.Instance}
|
1237 |
@param instance: the instance parameter to fill
|
1238 |
@rtype: dict
|
1239 |
@return: a copy of the instance's beparams with missing keys filled from
|
1240 |
the cluster defaults
|
1241 |
|
1242 |
"""
|
1243 |
return self.SimpleFillBE(instance.beparams) |
1244 |
|
1245 |
def SimpleFillNIC(self, nicparams): |
1246 |
"""Fill a given nicparams dict with cluster defaults.
|
1247 |
|
1248 |
@type nicparams: dict
|
1249 |
@param nicparams: the dict to fill
|
1250 |
@rtype: dict
|
1251 |
@return: a copy of the passed in nicparams with missing keys filled
|
1252 |
from the cluster defaults
|
1253 |
|
1254 |
"""
|
1255 |
return FillDict(self.nicparams.get(constants.PP_DEFAULT, {}), nicparams) |
1256 |
|
1257 |
def SimpleFillOS(self, os_name, os_params): |
1258 |
"""Fill an instance's osparams dict with cluster defaults.
|
1259 |
|
1260 |
@type os_name: string
|
1261 |
@param os_name: the OS name to use
|
1262 |
@type os_params: dict
|
1263 |
@param os_params: the dict to fill with default values
|
1264 |
@rtype: dict
|
1265 |
@return: a copy of the instance's osparams with missing keys filled from
|
1266 |
the cluster defaults
|
1267 |
|
1268 |
"""
|
1269 |
name_only = os_name.split("+", 1)[0] |
1270 |
# base OS
|
1271 |
result = self.osparams.get(name_only, {})
|
1272 |
# OS with variant
|
1273 |
result = FillDict(result, self.osparams.get(os_name, {}))
|
1274 |
# specified params
|
1275 |
return FillDict(result, os_params)
|
1276 |
|
1277 |
def FillND(self, node, nodegroup): |
1278 |
"""Return filled out ndparams for L{objects.NodeGroup} and L{object.Node}
|
1279 |
|
1280 |
@type node: L{objects.Node}
|
1281 |
@param node: A Node object to fill
|
1282 |
@type nodegroup: L{objects.NodeGroup}
|
1283 |
@param nodegroup: A Node object to fill
|
1284 |
@return a copy of the node's ndparams with defaults filled
|
1285 |
|
1286 |
"""
|
1287 |
return self.SimpleFillND(nodegroup.FillND(node)) |
1288 |
|
1289 |
def SimpleFillND(self, ndparams): |
1290 |
"""Fill a given ndparams dict with defaults.
|
1291 |
|
1292 |
@type ndparams: dict
|
1293 |
@param ndparams: the dict to fill
|
1294 |
@rtype: dict
|
1295 |
@return: a copy of the passed in ndparams with missing keys filled
|
1296 |
from the cluster defaults
|
1297 |
|
1298 |
"""
|
1299 |
return FillDict(self.ndparams, ndparams) |
1300 |
|
1301 |
|
1302 |
class BlockDevStatus(ConfigObject): |
1303 |
"""Config object representing the status of a block device."""
|
1304 |
__slots__ = [ |
1305 |
"dev_path",
|
1306 |
"major",
|
1307 |
"minor",
|
1308 |
"sync_percent",
|
1309 |
"estimated_time",
|
1310 |
"is_degraded",
|
1311 |
"ldisk_status",
|
1312 |
] |
1313 |
|
1314 |
|
1315 |
class ImportExportStatus(ConfigObject): |
1316 |
"""Config object representing the status of an import or export."""
|
1317 |
__slots__ = [ |
1318 |
"recent_output",
|
1319 |
"listen_port",
|
1320 |
"connected",
|
1321 |
"progress_mbytes",
|
1322 |
"progress_throughput",
|
1323 |
"progress_eta",
|
1324 |
"progress_percent",
|
1325 |
"exit_status",
|
1326 |
"error_message",
|
1327 |
] + _TIMESTAMPS |
1328 |
|
1329 |
|
1330 |
class ImportExportOptions(ConfigObject): |
1331 |
"""Options for import/export daemon
|
1332 |
|
1333 |
@ivar key_name: X509 key name (None for cluster certificate)
|
1334 |
@ivar ca_pem: Remote peer CA in PEM format (None for cluster certificate)
|
1335 |
@ivar compress: Compression method (one of L{constants.IEC_ALL})
|
1336 |
@ivar magic: Used to ensure the connection goes to the right disk
|
1337 |
|
1338 |
"""
|
1339 |
__slots__ = [ |
1340 |
"key_name",
|
1341 |
"ca_pem",
|
1342 |
"compress",
|
1343 |
"magic",
|
1344 |
] |
1345 |
|
1346 |
|
1347 |
class ConfdRequest(ConfigObject): |
1348 |
"""Object holding a confd request.
|
1349 |
|
1350 |
@ivar protocol: confd protocol version
|
1351 |
@ivar type: confd query type
|
1352 |
@ivar query: query request
|
1353 |
@ivar rsalt: requested reply salt
|
1354 |
|
1355 |
"""
|
1356 |
__slots__ = [ |
1357 |
"protocol",
|
1358 |
"type",
|
1359 |
"query",
|
1360 |
"rsalt",
|
1361 |
] |
1362 |
|
1363 |
|
1364 |
class ConfdReply(ConfigObject): |
1365 |
"""Object holding a confd reply.
|
1366 |
|
1367 |
@ivar protocol: confd protocol version
|
1368 |
@ivar status: reply status code (ok, error)
|
1369 |
@ivar answer: confd query reply
|
1370 |
@ivar serial: configuration serial number
|
1371 |
|
1372 |
"""
|
1373 |
__slots__ = [ |
1374 |
"protocol",
|
1375 |
"status",
|
1376 |
"answer",
|
1377 |
"serial",
|
1378 |
] |
1379 |
|
1380 |
|
1381 |
class SerializableConfigParser(ConfigParser.SafeConfigParser): |
1382 |
"""Simple wrapper over ConfigParse that allows serialization.
|
1383 |
|
1384 |
This class is basically ConfigParser.SafeConfigParser with two
|
1385 |
additional methods that allow it to serialize/unserialize to/from a
|
1386 |
buffer.
|
1387 |
|
1388 |
"""
|
1389 |
def Dumps(self): |
1390 |
"""Dump this instance and return the string representation."""
|
1391 |
buf = StringIO() |
1392 |
self.write(buf)
|
1393 |
return buf.getvalue()
|
1394 |
|
1395 |
@classmethod
|
1396 |
def Loads(cls, data): |
1397 |
"""Load data from a string."""
|
1398 |
buf = StringIO(data) |
1399 |
cfp = cls() |
1400 |
cfp.readfp(buf) |
1401 |
return cfp
|