root / lib / objects.py @ 196ec587
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# Copyright (C) 2006, 2007 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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__all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance", |
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"OS", "Node", "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 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__ = (["version", "cluster", "nodes", "instances", "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": |
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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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return obj
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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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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 will be removed in 2.2
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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 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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# check if child nodes differ from my nodes; note that
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# subdisk can differ from the child itself, and be instead
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# one of its descendants
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for subnode, subdisk in child_result: |
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if subnode not in my_nodes: |
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result.append((subnode, subdisk)) |
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# otherwise child is under our own node, so we ignore this
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# entry (but probably the other results in the list will
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# be different)
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return result
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def RecordGrow(self, amount): |
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"""Update the size of this disk after growth.
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This method recurses over the disks's children and updates their
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size correspondigly. The method needs to be kept in sync with the
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actual algorithms from bdev.
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"""
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if self.dev_type == constants.LD_LV or self.dev_type == constants.LD_FILE: |
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self.size += amount
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elif self.dev_type == constants.LD_DRBD8: |
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if self.children: |
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self.children[0].RecordGrow(amount) |
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self.size += amount
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else:
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raise errors.ProgrammerError("Disk.RecordGrow called for unsupported" |
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" disk type %s" % self.dev_type) |
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|
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def UnsetSize(self): |
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"""Sets recursively the size to zero for the disk and its children.
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|
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"""
|
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if self.children: |
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for child in self.children: |
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child.UnsetSize() |
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self.size = 0 |
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|
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def SetPhysicalID(self, target_node, nodes_ip): |
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"""Convert the logical ID to the physical ID.
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This is used only for drbd, which needs ip/port configuration.
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The routine descends down and updates its children also, because
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this helps when the only the top device is passed to the remote
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node.
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Arguments:
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- target_node: the node we wish to configure for
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- nodes_ip: a mapping of node name to ip
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The target_node must exist in in nodes_ip, and must be one of the
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nodes in the logical ID for each of the DRBD devices encountered
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in the disk tree.
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"""
|
537 |
if self.children: |
538 |
for child in self.children: |
539 |
child.SetPhysicalID(target_node, nodes_ip) |
540 |
|
541 |
if self.logical_id is None and self.physical_id is not None: |
542 |
return
|
543 |
if self.dev_type in constants.LDS_DRBD: |
544 |
pnode, snode, port, pminor, sminor, secret = self.logical_id
|
545 |
if target_node not in (pnode, snode): |
546 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
547 |
target_node) |
548 |
pnode_ip = nodes_ip.get(pnode, None)
|
549 |
snode_ip = nodes_ip.get(snode, None)
|
550 |
if pnode_ip is None or snode_ip is None: |
551 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
552 |
" for %s" % str(self)) |
553 |
p_data = (pnode_ip, port) |
554 |
s_data = (snode_ip, port) |
555 |
if pnode == target_node:
|
556 |
self.physical_id = p_data + s_data + (pminor, secret)
|
557 |
else: # it must be secondary, we tested above |
558 |
self.physical_id = s_data + p_data + (sminor, secret)
|
559 |
else:
|
560 |
self.physical_id = self.logical_id |
561 |
return
|
562 |
|
563 |
def ToDict(self): |
564 |
"""Disk-specific conversion to standard python types.
|
565 |
|
566 |
This replaces the children lists of objects with lists of
|
567 |
standard python types.
|
568 |
|
569 |
"""
|
570 |
bo = super(Disk, self).ToDict() |
571 |
|
572 |
for attr in ("children",): |
573 |
alist = bo.get(attr, None)
|
574 |
if alist:
|
575 |
bo[attr] = self._ContainerToDicts(alist)
|
576 |
return bo
|
577 |
|
578 |
@classmethod
|
579 |
def FromDict(cls, val): |
580 |
"""Custom function for Disks
|
581 |
|
582 |
"""
|
583 |
obj = super(Disk, cls).FromDict(val)
|
584 |
if obj.children:
|
585 |
obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
|
586 |
if obj.logical_id and isinstance(obj.logical_id, list): |
587 |
obj.logical_id = tuple(obj.logical_id)
|
588 |
if obj.physical_id and isinstance(obj.physical_id, list): |
589 |
obj.physical_id = tuple(obj.physical_id)
|
590 |
if obj.dev_type in constants.LDS_DRBD: |
591 |
# we need a tuple of length six here
|
592 |
if len(obj.logical_id) < 6: |
593 |
obj.logical_id += (None,) * (6 - len(obj.logical_id)) |
594 |
return obj
|
595 |
|
596 |
def __str__(self): |
597 |
"""Custom str() formatter for disks.
|
598 |
|
599 |
"""
|
600 |
if self.dev_type == constants.LD_LV: |
601 |
val = "<LogicalVolume(/dev/%s/%s" % self.logical_id |
602 |
elif self.dev_type in constants.LDS_DRBD: |
603 |
node_a, node_b, port, minor_a, minor_b = self.logical_id[:5] |
604 |
val = "<DRBD8("
|
605 |
if self.physical_id is None: |
606 |
phy = "unconfigured"
|
607 |
else:
|
608 |
phy = ("configured as %s:%s %s:%s" %
|
609 |
(self.physical_id[0], self.physical_id[1], |
610 |
self.physical_id[2], self.physical_id[3])) |
611 |
|
612 |
val += ("hosts=%s/%d-%s/%d, port=%s, %s, " %
|
613 |
(node_a, minor_a, node_b, minor_b, port, phy)) |
614 |
if self.children and self.children.count(None) == 0: |
615 |
val += "backend=%s, metadev=%s" % (self.children[0], self.children[1]) |
616 |
else:
|
617 |
val += "no local storage"
|
618 |
else:
|
619 |
val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
|
620 |
(self.dev_type, self.logical_id, self.physical_id, self.children)) |
621 |
if self.iv_name is None: |
622 |
val += ", not visible"
|
623 |
else:
|
624 |
val += ", visible as /dev/%s" % self.iv_name |
625 |
if isinstance(self.size, int): |
626 |
val += ", size=%dm)>" % self.size |
627 |
else:
|
628 |
val += ", size='%s')>" % (self.size,) |
629 |
return val
|
630 |
|
631 |
def Verify(self): |
632 |
"""Checks that this disk is correctly configured.
|
633 |
|
634 |
"""
|
635 |
all_errors = [] |
636 |
if self.mode not in constants.DISK_ACCESS_SET: |
637 |
all_errors.append("Disk access mode '%s' is invalid" % (self.mode, )) |
638 |
return all_errors
|
639 |
|
640 |
def UpgradeConfig(self): |
641 |
"""Fill defaults for missing configuration values.
|
642 |
|
643 |
"""
|
644 |
if self.children: |
645 |
for child in self.children: |
646 |
child.UpgradeConfig() |
647 |
# add here config upgrade for this disk
|
648 |
|
649 |
|
650 |
class Instance(TaggableObject): |
651 |
"""Config object representing an instance."""
|
652 |
__slots__ = [ |
653 |
"name",
|
654 |
"primary_node",
|
655 |
"os",
|
656 |
"hypervisor",
|
657 |
"hvparams",
|
658 |
"beparams",
|
659 |
"admin_up",
|
660 |
"nics",
|
661 |
"disks",
|
662 |
"disk_template",
|
663 |
"network_port",
|
664 |
"serial_no",
|
665 |
] + _TIMESTAMPS + _UUID |
666 |
|
667 |
def _ComputeSecondaryNodes(self): |
668 |
"""Compute the list of secondary nodes.
|
669 |
|
670 |
This is a simple wrapper over _ComputeAllNodes.
|
671 |
|
672 |
"""
|
673 |
all_nodes = set(self._ComputeAllNodes()) |
674 |
all_nodes.discard(self.primary_node)
|
675 |
return tuple(all_nodes) |
676 |
|
677 |
secondary_nodes = property(_ComputeSecondaryNodes, None, None, |
678 |
"List of secondary nodes")
|
679 |
|
680 |
def _ComputeAllNodes(self): |
681 |
"""Compute the list of all nodes.
|
682 |
|
683 |
Since the data is already there (in the drbd disks), keeping it as
|
684 |
a separate normal attribute is redundant and if not properly
|
685 |
synchronised can cause problems. Thus it's better to compute it
|
686 |
dynamically.
|
687 |
|
688 |
"""
|
689 |
def _Helper(nodes, device): |
690 |
"""Recursively computes nodes given a top device."""
|
691 |
if device.dev_type in constants.LDS_DRBD: |
692 |
nodea, nodeb = device.logical_id[:2]
|
693 |
nodes.add(nodea) |
694 |
nodes.add(nodeb) |
695 |
if device.children:
|
696 |
for child in device.children: |
697 |
_Helper(nodes, child) |
698 |
|
699 |
all_nodes = set()
|
700 |
all_nodes.add(self.primary_node)
|
701 |
for device in self.disks: |
702 |
_Helper(all_nodes, device) |
703 |
return tuple(all_nodes) |
704 |
|
705 |
all_nodes = property(_ComputeAllNodes, None, None, |
706 |
"List of all nodes of the instance")
|
707 |
|
708 |
def MapLVsByNode(self, lvmap=None, devs=None, node=None): |
709 |
"""Provide a mapping of nodes to LVs this instance owns.
|
710 |
|
711 |
This function figures out what logical volumes should belong on
|
712 |
which nodes, recursing through a device tree.
|
713 |
|
714 |
@param lvmap: optional dictionary to receive the
|
715 |
'node' : ['lv', ...] data.
|
716 |
|
717 |
@return: None if lvmap arg is given, otherwise, a dictionary
|
718 |
of the form { 'nodename' : ['volume1', 'volume2', ...], ... }
|
719 |
|
720 |
"""
|
721 |
if node == None: |
722 |
node = self.primary_node
|
723 |
|
724 |
if lvmap is None: |
725 |
lvmap = { node : [] } |
726 |
ret = lvmap |
727 |
else:
|
728 |
if not node in lvmap: |
729 |
lvmap[node] = [] |
730 |
ret = None
|
731 |
|
732 |
if not devs: |
733 |
devs = self.disks
|
734 |
|
735 |
for dev in devs: |
736 |
if dev.dev_type == constants.LD_LV:
|
737 |
lvmap[node].append(dev.logical_id[1])
|
738 |
|
739 |
elif dev.dev_type in constants.LDS_DRBD: |
740 |
if dev.children:
|
741 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0]) |
742 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1]) |
743 |
|
744 |
elif dev.children:
|
745 |
self.MapLVsByNode(lvmap, dev.children, node)
|
746 |
|
747 |
return ret
|
748 |
|
749 |
def FindDisk(self, idx): |
750 |
"""Find a disk given having a specified index.
|
751 |
|
752 |
This is just a wrapper that does validation of the index.
|
753 |
|
754 |
@type idx: int
|
755 |
@param idx: the disk index
|
756 |
@rtype: L{Disk}
|
757 |
@return: the corresponding disk
|
758 |
@raise errors.OpPrereqError: when the given index is not valid
|
759 |
|
760 |
"""
|
761 |
try:
|
762 |
idx = int(idx)
|
763 |
return self.disks[idx] |
764 |
except (TypeError, ValueError), err: |
765 |
raise errors.OpPrereqError("Invalid disk index: '%s'" % str(err), |
766 |
errors.ECODE_INVAL) |
767 |
except IndexError: |
768 |
raise errors.OpPrereqError("Invalid disk index: %d (instace has disks" |
769 |
" 0 to %d" % (idx, len(self.disks)), |
770 |
errors.ECODE_INVAL) |
771 |
|
772 |
def ToDict(self): |
773 |
"""Instance-specific conversion to standard python types.
|
774 |
|
775 |
This replaces the children lists of objects with lists of standard
|
776 |
python types.
|
777 |
|
778 |
"""
|
779 |
bo = super(Instance, self).ToDict() |
780 |
|
781 |
for attr in "nics", "disks": |
782 |
alist = bo.get(attr, None)
|
783 |
if alist:
|
784 |
nlist = self._ContainerToDicts(alist)
|
785 |
else:
|
786 |
nlist = [] |
787 |
bo[attr] = nlist |
788 |
return bo
|
789 |
|
790 |
@classmethod
|
791 |
def FromDict(cls, val): |
792 |
"""Custom function for instances.
|
793 |
|
794 |
"""
|
795 |
obj = super(Instance, cls).FromDict(val)
|
796 |
obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
|
797 |
obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
|
798 |
return obj
|
799 |
|
800 |
def UpgradeConfig(self): |
801 |
"""Fill defaults for missing configuration values.
|
802 |
|
803 |
"""
|
804 |
for nic in self.nics: |
805 |
nic.UpgradeConfig() |
806 |
for disk in self.disks: |
807 |
disk.UpgradeConfig() |
808 |
if self.hvparams: |
809 |
for key in constants.HVC_GLOBALS: |
810 |
try:
|
811 |
del self.hvparams[key] |
812 |
except KeyError: |
813 |
pass
|
814 |
|
815 |
|
816 |
class OS(ConfigObject): |
817 |
"""Config object representing an operating system."""
|
818 |
__slots__ = [ |
819 |
"name",
|
820 |
"path",
|
821 |
"api_versions",
|
822 |
"create_script",
|
823 |
"export_script",
|
824 |
"import_script",
|
825 |
"rename_script",
|
826 |
"supported_variants",
|
827 |
] |
828 |
|
829 |
|
830 |
class Node(TaggableObject): |
831 |
"""Config object representing a node."""
|
832 |
__slots__ = [ |
833 |
"name",
|
834 |
"primary_ip",
|
835 |
"secondary_ip",
|
836 |
"serial_no",
|
837 |
"master_candidate",
|
838 |
"offline",
|
839 |
"drained",
|
840 |
] + _TIMESTAMPS + _UUID |
841 |
|
842 |
|
843 |
class Cluster(TaggableObject): |
844 |
"""Config object representing the cluster."""
|
845 |
__slots__ = [ |
846 |
"serial_no",
|
847 |
"rsahostkeypub",
|
848 |
"highest_used_port",
|
849 |
"tcpudp_port_pool",
|
850 |
"mac_prefix",
|
851 |
"volume_group_name",
|
852 |
"default_bridge",
|
853 |
"default_hypervisor",
|
854 |
"master_node",
|
855 |
"master_ip",
|
856 |
"master_netdev",
|
857 |
"cluster_name",
|
858 |
"file_storage_dir",
|
859 |
"enabled_hypervisors",
|
860 |
"hvparams",
|
861 |
"os_hvp",
|
862 |
"beparams",
|
863 |
"nicparams",
|
864 |
"candidate_pool_size",
|
865 |
"modify_etc_hosts",
|
866 |
"modify_ssh_setup",
|
867 |
"maintain_node_health",
|
868 |
"uid_pool",
|
869 |
] + _TIMESTAMPS + _UUID |
870 |
|
871 |
def UpgradeConfig(self): |
872 |
"""Fill defaults for missing configuration values.
|
873 |
|
874 |
"""
|
875 |
# pylint: disable-msg=E0203
|
876 |
# because these are "defined" via slots, not manually
|
877 |
if self.hvparams is None: |
878 |
self.hvparams = constants.HVC_DEFAULTS
|
879 |
else:
|
880 |
for hypervisor in self.hvparams: |
881 |
self.hvparams[hypervisor] = FillDict(
|
882 |
constants.HVC_DEFAULTS[hypervisor], self.hvparams[hypervisor])
|
883 |
|
884 |
# TODO: Figure out if it's better to put this into OS than Cluster
|
885 |
if self.os_hvp is None: |
886 |
self.os_hvp = {}
|
887 |
|
888 |
self.beparams = UpgradeGroupedParams(self.beparams, |
889 |
constants.BEC_DEFAULTS) |
890 |
migrate_default_bridge = not self.nicparams |
891 |
self.nicparams = UpgradeGroupedParams(self.nicparams, |
892 |
constants.NICC_DEFAULTS) |
893 |
if migrate_default_bridge:
|
894 |
self.nicparams[constants.PP_DEFAULT][constants.NIC_LINK] = \
|
895 |
self.default_bridge
|
896 |
|
897 |
if self.modify_etc_hosts is None: |
898 |
self.modify_etc_hosts = True |
899 |
|
900 |
if self.modify_ssh_setup is None: |
901 |
self.modify_ssh_setup = True |
902 |
|
903 |
# default_bridge is no longer used it 2.1. The slot is left there to
|
904 |
# support auto-upgrading, but will be removed in 2.2
|
905 |
if self.default_bridge is not None: |
906 |
self.default_bridge = None |
907 |
|
908 |
# default_hypervisor is just the first enabled one in 2.1
|
909 |
if self.default_hypervisor is not None: |
910 |
self.enabled_hypervisors = ([self.default_hypervisor] + |
911 |
[hvname for hvname in self.enabled_hypervisors |
912 |
if hvname != self.default_hypervisor]) |
913 |
self.default_hypervisor = None |
914 |
|
915 |
# maintain_node_health added after 2.1.1
|
916 |
if self.maintain_node_health is None: |
917 |
self.maintain_node_health = False |
918 |
|
919 |
if self.uid_pool is None: |
920 |
self.uid_pool = []
|
921 |
|
922 |
def ToDict(self): |
923 |
"""Custom function for cluster.
|
924 |
|
925 |
"""
|
926 |
mydict = super(Cluster, self).ToDict() |
927 |
mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool) |
928 |
return mydict
|
929 |
|
930 |
@classmethod
|
931 |
def FromDict(cls, val): |
932 |
"""Custom function for cluster.
|
933 |
|
934 |
"""
|
935 |
obj = super(Cluster, cls).FromDict(val)
|
936 |
if not isinstance(obj.tcpudp_port_pool, set): |
937 |
obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
|
938 |
return obj
|
939 |
|
940 |
def GetHVDefaults(self, hypervisor, os_name=None, skip_keys=None): |
941 |
"""Get the default hypervisor parameters for the cluster.
|
942 |
|
943 |
@param hypervisor: the hypervisor name
|
944 |
@param os_name: if specified, we'll also update the defaults for this OS
|
945 |
@param skip_keys: if passed, list of keys not to use
|
946 |
@return: the defaults dict
|
947 |
|
948 |
"""
|
949 |
if skip_keys is None: |
950 |
skip_keys = [] |
951 |
|
952 |
fill_stack = [self.hvparams.get(hypervisor, {})]
|
953 |
if os_name is not None: |
954 |
os_hvp = self.os_hvp.get(os_name, {}).get(hypervisor, {})
|
955 |
fill_stack.append(os_hvp) |
956 |
|
957 |
ret_dict = {} |
958 |
for o_dict in fill_stack: |
959 |
ret_dict = FillDict(ret_dict, o_dict, skip_keys=skip_keys) |
960 |
|
961 |
return ret_dict
|
962 |
|
963 |
|
964 |
def FillHV(self, instance, skip_globals=False): |
965 |
"""Fill an instance's hvparams dict.
|
966 |
|
967 |
@type instance: L{objects.Instance}
|
968 |
@param instance: the instance parameter to fill
|
969 |
@type skip_globals: boolean
|
970 |
@param skip_globals: if True, the global hypervisor parameters will
|
971 |
not be filled
|
972 |
@rtype: dict
|
973 |
@return: a copy of the instance's hvparams with missing keys filled from
|
974 |
the cluster defaults
|
975 |
|
976 |
"""
|
977 |
if skip_globals:
|
978 |
skip_keys = constants.HVC_GLOBALS |
979 |
else:
|
980 |
skip_keys = [] |
981 |
|
982 |
def_dict = self.GetHVDefaults(instance.hypervisor, instance.os,
|
983 |
skip_keys=skip_keys) |
984 |
return FillDict(def_dict, instance.hvparams, skip_keys=skip_keys)
|
985 |
|
986 |
def FillBE(self, instance): |
987 |
"""Fill an instance's beparams dict.
|
988 |
|
989 |
@type instance: L{objects.Instance}
|
990 |
@param instance: the instance parameter to fill
|
991 |
@rtype: dict
|
992 |
@return: a copy of the instance's beparams with missing keys filled from
|
993 |
the cluster defaults
|
994 |
|
995 |
"""
|
996 |
return FillDict(self.beparams.get(constants.PP_DEFAULT, {}), |
997 |
instance.beparams) |
998 |
|
999 |
|
1000 |
class BlockDevStatus(ConfigObject): |
1001 |
"""Config object representing the status of a block device."""
|
1002 |
__slots__ = [ |
1003 |
"dev_path",
|
1004 |
"major",
|
1005 |
"minor",
|
1006 |
"sync_percent",
|
1007 |
"estimated_time",
|
1008 |
"is_degraded",
|
1009 |
"ldisk_status",
|
1010 |
] |
1011 |
|
1012 |
|
1013 |
class ConfdRequest(ConfigObject): |
1014 |
"""Object holding a confd request.
|
1015 |
|
1016 |
@ivar protocol: confd protocol version
|
1017 |
@ivar type: confd query type
|
1018 |
@ivar query: query request
|
1019 |
@ivar rsalt: requested reply salt
|
1020 |
|
1021 |
"""
|
1022 |
__slots__ = [ |
1023 |
"protocol",
|
1024 |
"type",
|
1025 |
"query",
|
1026 |
"rsalt",
|
1027 |
] |
1028 |
|
1029 |
|
1030 |
class ConfdReply(ConfigObject): |
1031 |
"""Object holding a confd reply.
|
1032 |
|
1033 |
@ivar protocol: confd protocol version
|
1034 |
@ivar status: reply status code (ok, error)
|
1035 |
@ivar answer: confd query reply
|
1036 |
@ivar serial: configuration serial number
|
1037 |
|
1038 |
"""
|
1039 |
__slots__ = [ |
1040 |
"protocol",
|
1041 |
"status",
|
1042 |
"answer",
|
1043 |
"serial",
|
1044 |
] |
1045 |
|
1046 |
|
1047 |
class SerializableConfigParser(ConfigParser.SafeConfigParser): |
1048 |
"""Simple wrapper over ConfigParse that allows serialization.
|
1049 |
|
1050 |
This class is basically ConfigParser.SafeConfigParser with two
|
1051 |
additional methods that allow it to serialize/unserialize to/from a
|
1052 |
buffer.
|
1053 |
|
1054 |
"""
|
1055 |
def Dumps(self): |
1056 |
"""Dump this instance and return the string representation."""
|
1057 |
buf = StringIO() |
1058 |
self.write(buf)
|
1059 |
return buf.getvalue()
|
1060 |
|
1061 |
@classmethod
|
1062 |
def Loads(cls, data): |
1063 |
"""Load data from a string."""
|
1064 |
buf = StringIO(data) |
1065 |
cfp = cls() |
1066 |
cfp.readfp(buf) |
1067 |
return cfp
|