4 # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 """Transportable objects for Ganeti.
24 This module provides small, mostly data-only objects which are safe to
25 pass to and from external parties.
29 # pylint: disable-msg=E0203,W0201
31 # E0203: Access to member %r before its definition, since we use
32 # objects.py which doesn't explicitely initialise its members
34 # W0201: Attribute '%s' defined outside __init__
40 from cStringIO import StringIO
42 from ganeti import errors
43 from ganeti import constants
45 from socket import AF_INET
48 __all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance",
49 "OS", "Node", "NodeGroup", "Cluster", "FillDict"]
51 _TIMESTAMPS = ["ctime", "mtime"]
55 def FillDict(defaults_dict, custom_dict, skip_keys=None):
56 """Basic function to apply settings on top a default dict.
58 @type defaults_dict: dict
59 @param defaults_dict: dictionary holding the default values
60 @type custom_dict: dict
61 @param custom_dict: dictionary holding customized value
63 @param skip_keys: which keys not to fill
65 @return: dict with the 'full' values
68 ret_dict = copy.deepcopy(defaults_dict)
69 ret_dict.update(custom_dict)
79 def UpgradeGroupedParams(target, defaults):
80 """Update all groups for the target parameter.
82 @type target: dict of dicts
83 @param target: {group: {parameter: value}}
85 @param defaults: default parameter values
89 target = {constants.PP_DEFAULT: defaults}
92 target[group] = FillDict(defaults, target[group])
96 class ConfigObject(object):
97 """A generic config object.
99 It has the following properties:
101 - provides somewhat safe recursive unpickling and pickling for its classes
102 - unset attributes which are defined in slots are always returned
103 as None instead of raising an error
105 Classes derived from this must always declare __slots__ (we use many
106 config objects and the memory reduction is useful)
111 def __init__(self, **kwargs):
112 for k, v in kwargs.iteritems():
115 def __getattr__(self, name):
116 if name not in self._all_slots():
117 raise AttributeError("Invalid object attribute %s.%s" %
118 (type(self).__name__, name))
121 def __setstate__(self, state):
122 slots = self._all_slots()
125 setattr(self, name, state[name])
129 """Compute the list of all declared slots for a class.
133 for parent in cls.__mro__:
134 slots.extend(getattr(parent, "__slots__", []))
138 """Convert to a dict holding only standard python types.
140 The generic routine just dumps all of this object's attributes in
141 a dict. It does not work if the class has children who are
142 ConfigObjects themselves (e.g. the nics list in an Instance), in
143 which case the object should subclass the function in order to
144 make sure all objects returned are only standard python types.
148 for name in self._all_slots():
149 value = getattr(self, name, None)
150 if value is not None:
154 __getstate__ = ToDict
157 def FromDict(cls, val):
158 """Create an object from a dictionary.
160 This generic routine takes a dict, instantiates a new instance of
161 the given class, and sets attributes based on the dict content.
163 As for `ToDict`, this does not work if the class has children
164 who are ConfigObjects themselves (e.g. the nics list in an
165 Instance), in which case the object should subclass the function
166 and alter the objects.
169 if not isinstance(val, dict):
170 raise errors.ConfigurationError("Invalid object passed to FromDict:"
171 " expected dict, got %s" % type(val))
172 val_str = dict([(str(k), v) for k, v in val.iteritems()])
173 obj = cls(**val_str) # pylint: disable-msg=W0142
177 def _ContainerToDicts(container):
178 """Convert the elements of a container to standard python types.
180 This method converts a container with elements derived from
181 ConfigData to standard python types. If the container is a dict,
182 we don't touch the keys, only the values.
185 if isinstance(container, dict):
186 ret = dict([(k, v.ToDict()) for k, v in container.iteritems()])
187 elif isinstance(container, (list, tuple, set, frozenset)):
188 ret = [elem.ToDict() for elem in container]
190 raise TypeError("Invalid type %s passed to _ContainerToDicts" %
195 def _ContainerFromDicts(source, c_type, e_type):
196 """Convert a container from standard python types.
198 This method converts a container with standard python types to
199 ConfigData objects. If the container is a dict, we don't touch the
200 keys, only the values.
203 if not isinstance(c_type, type):
204 raise TypeError("Container type %s passed to _ContainerFromDicts is"
205 " not a type" % type(c_type))
209 ret = dict([(k, e_type.FromDict(v)) for k, v in source.iteritems()])
210 elif c_type in (list, tuple, set, frozenset):
211 ret = c_type([e_type.FromDict(elem) for elem in source])
213 raise TypeError("Invalid container type %s passed to"
214 " _ContainerFromDicts" % c_type)
218 """Makes a deep copy of the current object and its children.
221 dict_form = self.ToDict()
222 clone_obj = self.__class__.FromDict(dict_form)
226 """Implement __repr__ for ConfigObjects."""
227 return repr(self.ToDict())
229 def UpgradeConfig(self):
230 """Fill defaults for missing configuration values.
232 This method will be called at configuration load time, and its
233 implementation will be object dependent.
239 class TaggableObject(ConfigObject):
240 """An generic class supporting tags.
244 VALID_TAG_RE = re.compile("^[\w.+*/:@-]+$")
247 def ValidateTag(cls, tag):
248 """Check if a tag is valid.
250 If the tag is invalid, an errors.TagError will be raised. The
251 function has no return value.
254 if not isinstance(tag, basestring):
255 raise errors.TagError("Invalid tag type (not a string)")
256 if len(tag) > constants.MAX_TAG_LEN:
257 raise errors.TagError("Tag too long (>%d characters)" %
258 constants.MAX_TAG_LEN)
260 raise errors.TagError("Tags cannot be empty")
261 if not cls.VALID_TAG_RE.match(tag):
262 raise errors.TagError("Tag contains invalid characters")
265 """Return the tags list.
268 tags = getattr(self, "tags", None)
270 tags = self.tags = set()
273 def AddTag(self, tag):
277 self.ValidateTag(tag)
278 tags = self.GetTags()
279 if len(tags) >= constants.MAX_TAGS_PER_OBJ:
280 raise errors.TagError("Too many tags")
281 self.GetTags().add(tag)
283 def RemoveTag(self, tag):
287 self.ValidateTag(tag)
288 tags = self.GetTags()
292 raise errors.TagError("Tag not found")
295 """Taggable-object-specific conversion to standard python types.
297 This replaces the tags set with a list.
300 bo = super(TaggableObject, self).ToDict()
302 tags = bo.get("tags", None)
303 if isinstance(tags, set):
304 bo["tags"] = list(tags)
308 def FromDict(cls, val):
309 """Custom function for instances.
312 obj = super(TaggableObject, cls).FromDict(val)
313 if hasattr(obj, "tags") and isinstance(obj.tags, list):
314 obj.tags = set(obj.tags)
318 class ConfigData(ConfigObject):
319 """Top-level config object."""
330 """Custom function for top-level config data.
332 This just replaces the list of instances, nodes and the cluster
333 with standard python types.
336 mydict = super(ConfigData, self).ToDict()
337 mydict["cluster"] = mydict["cluster"].ToDict()
338 for key in "nodes", "instances", "nodegroups":
339 mydict[key] = self._ContainerToDicts(mydict[key])
344 def FromDict(cls, val):
345 """Custom function for top-level config data
348 obj = super(ConfigData, cls).FromDict(val)
349 obj.cluster = Cluster.FromDict(obj.cluster)
350 obj.nodes = cls._ContainerFromDicts(obj.nodes, dict, Node)
351 obj.instances = cls._ContainerFromDicts(obj.instances, dict, Instance)
352 obj.nodegroups = cls._ContainerFromDicts(obj.nodegroups, dict, NodeGroup)
355 def HasAnyDiskOfType(self, dev_type):
356 """Check if in there is at disk of the given type in the configuration.
358 @type dev_type: L{constants.LDS_BLOCK}
359 @param dev_type: the type to look for
361 @return: boolean indicating if a disk of the given type was found or not
364 for instance in self.instances.values():
365 for disk in instance.disks:
366 if disk.IsBasedOnDiskType(dev_type):
370 def UpgradeConfig(self):
371 """Fill defaults for missing configuration values.
374 self.cluster.UpgradeConfig()
375 for node in self.nodes.values():
377 for instance in self.instances.values():
378 instance.UpgradeConfig()
379 if self.nodegroups is None:
381 for nodegroup in self.nodegroups.values():
382 nodegroup.UpgradeConfig()
383 if self.cluster.drbd_usermode_helper is None:
384 # To decide if we set an helper let's check if at least one instance has
385 # a DRBD disk. This does not cover all the possible scenarios but it
386 # gives a good approximation.
387 if self.HasAnyDiskOfType(constants.LD_DRBD8):
388 self.cluster.drbd_usermode_helper = constants.DEFAULT_DRBD_HELPER
391 class NIC(ConfigObject):
392 """Config object representing a network card."""
393 __slots__ = ["mac", "ip", "nicparams"]
396 def CheckParameterSyntax(cls, nicparams):
397 """Check the given parameters for validity.
399 @type nicparams: dict
400 @param nicparams: dictionary with parameter names/value
401 @raise errors.ConfigurationError: when a parameter is not valid
404 if nicparams[constants.NIC_MODE] not in constants.NIC_VALID_MODES:
405 err = "Invalid nic mode: %s" % nicparams[constants.NIC_MODE]
406 raise errors.ConfigurationError(err)
408 if (nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED and
409 not nicparams[constants.NIC_LINK]):
410 err = "Missing bridged nic link"
411 raise errors.ConfigurationError(err)
414 class Disk(ConfigObject):
415 """Config object representing a block device."""
416 __slots__ = ["dev_type", "logical_id", "physical_id",
417 "children", "iv_name", "size", "mode"]
419 def CreateOnSecondary(self):
420 """Test if this device needs to be created on a secondary node."""
421 return self.dev_type in (constants.LD_DRBD8, constants.LD_LV)
423 def AssembleOnSecondary(self):
424 """Test if this device needs to be assembled on a secondary node."""
425 return self.dev_type in (constants.LD_DRBD8, constants.LD_LV)
427 def OpenOnSecondary(self):
428 """Test if this device needs to be opened on a secondary node."""
429 return self.dev_type in (constants.LD_LV,)
431 def StaticDevPath(self):
432 """Return the device path if this device type has a static one.
434 Some devices (LVM for example) live always at the same /dev/ path,
435 irrespective of their status. For such devices, we return this
436 path, for others we return None.
438 @warning: The path returned is not a normalized pathname; callers
439 should check that it is a valid path.
442 if self.dev_type == constants.LD_LV:
443 return "/dev/%s/%s" % (self.logical_id[0], self.logical_id[1])
444 elif self.dev_type == constants.LD_BLOCKDEV:
445 return self.logical_id[1]
448 def ChildrenNeeded(self):
449 """Compute the needed number of children for activation.
451 This method will return either -1 (all children) or a positive
452 number denoting the minimum number of children needed for
453 activation (only mirrored devices will usually return >=0).
455 Currently, only DRBD8 supports diskless activation (therefore we
456 return 0), for all other we keep the previous semantics and return
460 if self.dev_type == constants.LD_DRBD8:
464 def IsBasedOnDiskType(self, dev_type):
465 """Check if the disk or its children are based on the given type.
467 @type dev_type: L{constants.LDS_BLOCK}
468 @param dev_type: the type to look for
470 @return: boolean indicating if a device of the given type was found or not
474 for child in self.children:
475 if child.IsBasedOnDiskType(dev_type):
477 return self.dev_type == dev_type
479 def GetNodes(self, node):
480 """This function returns the nodes this device lives on.
482 Given the node on which the parent of the device lives on (or, in
483 case of a top-level device, the primary node of the devices'
484 instance), this function will return a list of nodes on which this
485 devices needs to (or can) be assembled.
488 if self.dev_type in [constants.LD_LV, constants.LD_FILE,
489 constants.LD_BLOCKDEV]:
491 elif self.dev_type in constants.LDS_DRBD:
492 result = [self.logical_id[0], self.logical_id[1]]
493 if node not in result:
494 raise errors.ConfigurationError("DRBD device passed unknown node")
496 raise errors.ProgrammerError("Unhandled device type %s" % self.dev_type)
499 def ComputeNodeTree(self, parent_node):
500 """Compute the node/disk tree for this disk and its children.
502 This method, given the node on which the parent disk lives, will
503 return the list of all (node, disk) pairs which describe the disk
504 tree in the most compact way. For example, a drbd/lvm stack
505 will be returned as (primary_node, drbd) and (secondary_node, drbd)
506 which represents all the top-level devices on the nodes.
509 my_nodes = self.GetNodes(parent_node)
510 result = [(node, self) for node in my_nodes]
511 if not self.children:
514 for node in my_nodes:
515 for child in self.children:
516 child_result = child.ComputeNodeTree(node)
517 if len(child_result) == 1:
518 # child (and all its descendants) is simple, doesn't split
519 # over multiple hosts, so we don't need to describe it, our
520 # own entry for this node describes it completely
523 # check if child nodes differ from my nodes; note that
524 # subdisk can differ from the child itself, and be instead
525 # one of its descendants
526 for subnode, subdisk in child_result:
527 if subnode not in my_nodes:
528 result.append((subnode, subdisk))
529 # otherwise child is under our own node, so we ignore this
530 # entry (but probably the other results in the list will
534 def ComputeGrowth(self, amount):
535 """Compute the per-VG growth requirements.
537 This only works for VG-based disks.
539 @type amount: integer
540 @param amount: the desired increase in (user-visible) disk space
542 @return: a dictionary of volume-groups and the required size
545 if self.dev_type == constants.LD_LV:
546 return {self.logical_id[0]: amount}
547 elif self.dev_type == constants.LD_DRBD8:
549 return self.children[0].ComputeGrowth(amount)
553 # Other disk types do not require VG space
556 def RecordGrow(self, amount):
557 """Update the size of this disk after growth.
559 This method recurses over the disks's children and updates their
560 size correspondigly. The method needs to be kept in sync with the
561 actual algorithms from bdev.
564 if self.dev_type in (constants.LD_LV, constants.LD_FILE):
566 elif self.dev_type == constants.LD_DRBD8:
568 self.children[0].RecordGrow(amount)
571 raise errors.ProgrammerError("Disk.RecordGrow called for unsupported"
572 " disk type %s" % self.dev_type)
575 """Sets recursively the size to zero for the disk and its children.
579 for child in self.children:
583 def SetPhysicalID(self, target_node, nodes_ip):
584 """Convert the logical ID to the physical ID.
586 This is used only for drbd, which needs ip/port configuration.
588 The routine descends down and updates its children also, because
589 this helps when the only the top device is passed to the remote
593 - target_node: the node we wish to configure for
594 - nodes_ip: a mapping of node name to ip
596 The target_node must exist in in nodes_ip, and must be one of the
597 nodes in the logical ID for each of the DRBD devices encountered
602 for child in self.children:
603 child.SetPhysicalID(target_node, nodes_ip)
605 if self.logical_id is None and self.physical_id is not None:
607 if self.dev_type in constants.LDS_DRBD:
608 pnode, snode, port, pminor, sminor, secret = self.logical_id
609 if target_node not in (pnode, snode):
610 raise errors.ConfigurationError("DRBD device not knowing node %s" %
612 pnode_ip = nodes_ip.get(pnode, None)
613 snode_ip = nodes_ip.get(snode, None)
614 if pnode_ip is None or snode_ip is None:
615 raise errors.ConfigurationError("Can't find primary or secondary node"
616 " for %s" % str(self))
617 p_data = (pnode_ip, port)
618 s_data = (snode_ip, port)
619 if pnode == target_node:
620 self.physical_id = p_data + s_data + (pminor, secret)
621 else: # it must be secondary, we tested above
622 self.physical_id = s_data + p_data + (sminor, secret)
624 self.physical_id = self.logical_id
628 """Disk-specific conversion to standard python types.
630 This replaces the children lists of objects with lists of
631 standard python types.
634 bo = super(Disk, self).ToDict()
636 for attr in ("children",):
637 alist = bo.get(attr, None)
639 bo[attr] = self._ContainerToDicts(alist)
643 def FromDict(cls, val):
644 """Custom function for Disks
647 obj = super(Disk, cls).FromDict(val)
649 obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
650 if obj.logical_id and isinstance(obj.logical_id, list):
651 obj.logical_id = tuple(obj.logical_id)
652 if obj.physical_id and isinstance(obj.physical_id, list):
653 obj.physical_id = tuple(obj.physical_id)
654 if obj.dev_type in constants.LDS_DRBD:
655 # we need a tuple of length six here
656 if len(obj.logical_id) < 6:
657 obj.logical_id += (None,) * (6 - len(obj.logical_id))
661 """Custom str() formatter for disks.
664 if self.dev_type == constants.LD_LV:
665 val = "<LogicalVolume(/dev/%s/%s" % self.logical_id
666 elif self.dev_type in constants.LDS_DRBD:
667 node_a, node_b, port, minor_a, minor_b = self.logical_id[:5]
669 if self.physical_id is None:
672 phy = ("configured as %s:%s %s:%s" %
673 (self.physical_id[0], self.physical_id[1],
674 self.physical_id[2], self.physical_id[3]))
676 val += ("hosts=%s/%d-%s/%d, port=%s, %s, " %
677 (node_a, minor_a, node_b, minor_b, port, phy))
678 if self.children and self.children.count(None) == 0:
679 val += "backend=%s, metadev=%s" % (self.children[0], self.children[1])
681 val += "no local storage"
683 val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
684 (self.dev_type, self.logical_id, self.physical_id, self.children))
685 if self.iv_name is None:
686 val += ", not visible"
688 val += ", visible as /dev/%s" % self.iv_name
689 if isinstance(self.size, int):
690 val += ", size=%dm)>" % self.size
692 val += ", size='%s')>" % (self.size,)
696 """Checks that this disk is correctly configured.
700 if self.mode not in constants.DISK_ACCESS_SET:
701 all_errors.append("Disk access mode '%s' is invalid" % (self.mode, ))
704 def UpgradeConfig(self):
705 """Fill defaults for missing configuration values.
709 for child in self.children:
710 child.UpgradeConfig()
711 # add here config upgrade for this disk
714 class Instance(TaggableObject):
715 """Config object representing an instance."""
730 ] + _TIMESTAMPS + _UUID
732 def _ComputeSecondaryNodes(self):
733 """Compute the list of secondary nodes.
735 This is a simple wrapper over _ComputeAllNodes.
738 all_nodes = set(self._ComputeAllNodes())
739 all_nodes.discard(self.primary_node)
740 return tuple(all_nodes)
742 secondary_nodes = property(_ComputeSecondaryNodes, None, None,
743 "List of secondary nodes")
745 def _ComputeAllNodes(self):
746 """Compute the list of all nodes.
748 Since the data is already there (in the drbd disks), keeping it as
749 a separate normal attribute is redundant and if not properly
750 synchronised can cause problems. Thus it's better to compute it
754 def _Helper(nodes, device):
755 """Recursively computes nodes given a top device."""
756 if device.dev_type in constants.LDS_DRBD:
757 nodea, nodeb = device.logical_id[:2]
761 for child in device.children:
762 _Helper(nodes, child)
765 all_nodes.add(self.primary_node)
766 for device in self.disks:
767 _Helper(all_nodes, device)
768 return tuple(all_nodes)
770 all_nodes = property(_ComputeAllNodes, None, None,
771 "List of all nodes of the instance")
773 def MapLVsByNode(self, lvmap=None, devs=None, node=None):
774 """Provide a mapping of nodes to LVs this instance owns.
776 This function figures out what logical volumes should belong on
777 which nodes, recursing through a device tree.
779 @param lvmap: optional dictionary to receive the
780 'node' : ['lv', ...] data.
782 @return: None if lvmap arg is given, otherwise, a dictionary of
783 the form { 'nodename' : ['volume1', 'volume2', ...], ... };
784 volumeN is of the form "vg_name/lv_name", compatible with
789 node = self.primary_node
792 lvmap = { node : [] }
795 if not node in lvmap:
803 if dev.dev_type == constants.LD_LV:
804 lvmap[node].append(dev.logical_id[0]+"/"+dev.logical_id[1])
806 elif dev.dev_type in constants.LDS_DRBD:
808 self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0])
809 self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1])
812 self.MapLVsByNode(lvmap, dev.children, node)
816 def FindDisk(self, idx):
817 """Find a disk given having a specified index.
819 This is just a wrapper that does validation of the index.
822 @param idx: the disk index
824 @return: the corresponding disk
825 @raise errors.OpPrereqError: when the given index is not valid
830 return self.disks[idx]
831 except (TypeError, ValueError), err:
832 raise errors.OpPrereqError("Invalid disk index: '%s'" % str(err),
835 raise errors.OpPrereqError("Invalid disk index: %d (instace has disks"
836 " 0 to %d" % (idx, len(self.disks) - 1),
840 """Instance-specific conversion to standard python types.
842 This replaces the children lists of objects with lists of standard
846 bo = super(Instance, self).ToDict()
848 for attr in "nics", "disks":
849 alist = bo.get(attr, None)
851 nlist = self._ContainerToDicts(alist)
858 def FromDict(cls, val):
859 """Custom function for instances.
862 obj = super(Instance, cls).FromDict(val)
863 obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
864 obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
867 def UpgradeConfig(self):
868 """Fill defaults for missing configuration values.
871 for nic in self.nics:
873 for disk in self.disks:
876 for key in constants.HVC_GLOBALS:
878 del self.hvparams[key]
881 if self.osparams is None:
885 class OS(ConfigObject):
886 """Config object representing an operating system.
888 @type supported_parameters: list
889 @ivar supported_parameters: a list of tuples, name and description,
890 containing the supported parameters by this OS
892 @type VARIANT_DELIM: string
893 @cvar VARIANT_DELIM: the variant delimiter
905 "supported_variants",
906 "supported_parameters",
912 def SplitNameVariant(cls, name):
913 """Splits the name into the proper name and variant.
915 @param name: the OS (unprocessed) name
917 @return: a list of two elements; if the original name didn't
918 contain a variant, it's returned as an empty string
921 nv = name.split(cls.VARIANT_DELIM, 1)
927 def GetName(cls, name):
928 """Returns the proper name of the os (without the variant).
930 @param name: the OS (unprocessed) name
933 return cls.SplitNameVariant(name)[0]
936 def GetVariant(cls, name):
937 """Returns the variant the os (without the base name).
939 @param name: the OS (unprocessed) name
942 return cls.SplitNameVariant(name)[1]
945 class Node(TaggableObject):
946 """Config object representing a node."""
960 ] + _TIMESTAMPS + _UUID
962 def UpgradeConfig(self):
963 """Fill defaults for missing configuration values.
966 # pylint: disable-msg=E0203
967 # because these are "defined" via slots, not manually
968 if self.master_capable is None:
969 self.master_capable = True
971 if self.vm_capable is None:
972 self.vm_capable = True
974 if self.ndparams is None:
977 if self.powered is None:
981 class NodeGroup(TaggableObject):
982 """Config object representing a node group."""
989 ] + _TIMESTAMPS + _UUID
992 """Custom function for nodegroup.
994 This discards the members object, which gets recalculated and is only kept
998 mydict = super(NodeGroup, self).ToDict()
999 del mydict["members"]
1003 def FromDict(cls, val):
1004 """Custom function for nodegroup.
1006 The members slot is initialized to an empty list, upon deserialization.
1009 obj = super(NodeGroup, cls).FromDict(val)
1013 def UpgradeConfig(self):
1014 """Fill defaults for missing configuration values.
1017 if self.ndparams is None:
1020 if self.serial_no is None:
1023 if self.alloc_policy is None:
1024 self.alloc_policy = constants.ALLOC_POLICY_PREFERRED
1026 # We only update mtime, and not ctime, since we would not be able to provide
1027 # a correct value for creation time.
1028 if self.mtime is None:
1029 self.mtime = time.time()
1031 def FillND(self, node):
1032 """Return filled out ndparams for L{object.Node}
1034 @type node: L{objects.Node}
1035 @param node: A Node object to fill
1036 @return a copy of the node's ndparams with defaults filled
1039 return self.SimpleFillND(node.ndparams)
1041 def SimpleFillND(self, ndparams):
1042 """Fill a given ndparams dict with defaults.
1044 @type ndparams: dict
1045 @param ndparams: the dict to fill
1047 @return: a copy of the passed in ndparams with missing keys filled
1048 from the node group defaults
1051 return FillDict(self.ndparams, ndparams)
1054 class Cluster(TaggableObject):
1055 """Config object representing the cluster."""
1059 "highest_used_port",
1062 "volume_group_name",
1064 "drbd_usermode_helper",
1066 "default_hypervisor",
1072 "shared_file_storage_dir",
1073 "enabled_hypervisors",
1080 "candidate_pool_size",
1083 "maintain_node_health",
1085 "default_iallocator",
1088 "primary_ip_family",
1089 "prealloc_wipe_disks",
1090 ] + _TIMESTAMPS + _UUID
1092 def UpgradeConfig(self):
1093 """Fill defaults for missing configuration values.
1096 # pylint: disable-msg=E0203
1097 # because these are "defined" via slots, not manually
1098 if self.hvparams is None:
1099 self.hvparams = constants.HVC_DEFAULTS
1101 for hypervisor in self.hvparams:
1102 self.hvparams[hypervisor] = FillDict(
1103 constants.HVC_DEFAULTS[hypervisor], self.hvparams[hypervisor])
1105 if self.os_hvp is None:
1108 # osparams added before 2.2
1109 if self.osparams is None:
1112 if self.ndparams is None:
1113 self.ndparams = constants.NDC_DEFAULTS
1115 self.beparams = UpgradeGroupedParams(self.beparams,
1116 constants.BEC_DEFAULTS)
1117 migrate_default_bridge = not self.nicparams
1118 self.nicparams = UpgradeGroupedParams(self.nicparams,
1119 constants.NICC_DEFAULTS)
1120 if migrate_default_bridge:
1121 self.nicparams[constants.PP_DEFAULT][constants.NIC_LINK] = \
1124 if self.modify_etc_hosts is None:
1125 self.modify_etc_hosts = True
1127 if self.modify_ssh_setup is None:
1128 self.modify_ssh_setup = True
1130 # default_bridge is no longer used in 2.1. The slot is left there to
1131 # support auto-upgrading. It can be removed once we decide to deprecate
1132 # upgrading straight from 2.0.
1133 if self.default_bridge is not None:
1134 self.default_bridge = None
1136 # default_hypervisor is just the first enabled one in 2.1. This slot and
1137 # code can be removed once upgrading straight from 2.0 is deprecated.
1138 if self.default_hypervisor is not None:
1139 self.enabled_hypervisors = ([self.default_hypervisor] +
1140 [hvname for hvname in self.enabled_hypervisors
1141 if hvname != self.default_hypervisor])
1142 self.default_hypervisor = None
1144 # maintain_node_health added after 2.1.1
1145 if self.maintain_node_health is None:
1146 self.maintain_node_health = False
1148 if self.uid_pool is None:
1151 if self.default_iallocator is None:
1152 self.default_iallocator = ""
1154 # reserved_lvs added before 2.2
1155 if self.reserved_lvs is None:
1156 self.reserved_lvs = []
1158 # hidden and blacklisted operating systems added before 2.2.1
1159 if self.hidden_os is None:
1162 if self.blacklisted_os is None:
1163 self.blacklisted_os = []
1165 # primary_ip_family added before 2.3
1166 if self.primary_ip_family is None:
1167 self.primary_ip_family = AF_INET
1169 if self.prealloc_wipe_disks is None:
1170 self.prealloc_wipe_disks = False
1172 # shared_file_storage_dir added before 2.5
1173 if self.shared_file_storage_dir is None:
1174 self.shared_file_storage_dir = ""
1177 """Custom function for cluster.
1180 mydict = super(Cluster, self).ToDict()
1181 mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool)
1185 def FromDict(cls, val):
1186 """Custom function for cluster.
1189 obj = super(Cluster, cls).FromDict(val)
1190 if not isinstance(obj.tcpudp_port_pool, set):
1191 obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
1194 def GetHVDefaults(self, hypervisor, os_name=None, skip_keys=None):
1195 """Get the default hypervisor parameters for the cluster.
1197 @param hypervisor: the hypervisor name
1198 @param os_name: if specified, we'll also update the defaults for this OS
1199 @param skip_keys: if passed, list of keys not to use
1200 @return: the defaults dict
1203 if skip_keys is None:
1206 fill_stack = [self.hvparams.get(hypervisor, {})]
1207 if os_name is not None:
1208 os_hvp = self.os_hvp.get(os_name, {}).get(hypervisor, {})
1209 fill_stack.append(os_hvp)
1212 for o_dict in fill_stack:
1213 ret_dict = FillDict(ret_dict, o_dict, skip_keys=skip_keys)
1217 def SimpleFillHV(self, hv_name, os_name, hvparams, skip_globals=False):
1218 """Fill a given hvparams dict with cluster defaults.
1220 @type hv_name: string
1221 @param hv_name: the hypervisor to use
1222 @type os_name: string
1223 @param os_name: the OS to use for overriding the hypervisor defaults
1224 @type skip_globals: boolean
1225 @param skip_globals: if True, the global hypervisor parameters will
1228 @return: a copy of the given hvparams with missing keys filled from
1229 the cluster defaults
1233 skip_keys = constants.HVC_GLOBALS
1237 def_dict = self.GetHVDefaults(hv_name, os_name, skip_keys=skip_keys)
1238 return FillDict(def_dict, hvparams, skip_keys=skip_keys)
1240 def FillHV(self, instance, skip_globals=False):
1241 """Fill an instance's hvparams dict with cluster defaults.
1243 @type instance: L{objects.Instance}
1244 @param instance: the instance parameter to fill
1245 @type skip_globals: boolean
1246 @param skip_globals: if True, the global hypervisor parameters will
1249 @return: a copy of the instance's hvparams with missing keys filled from
1250 the cluster defaults
1253 return self.SimpleFillHV(instance.hypervisor, instance.os,
1254 instance.hvparams, skip_globals)
1256 def SimpleFillBE(self, beparams):
1257 """Fill a given beparams dict with cluster defaults.
1259 @type beparams: dict
1260 @param beparams: the dict to fill
1262 @return: a copy of the passed in beparams with missing keys filled
1263 from the cluster defaults
1266 return FillDict(self.beparams.get(constants.PP_DEFAULT, {}), beparams)
1268 def FillBE(self, instance):
1269 """Fill an instance's beparams dict with cluster defaults.
1271 @type instance: L{objects.Instance}
1272 @param instance: the instance parameter to fill
1274 @return: a copy of the instance's beparams with missing keys filled from
1275 the cluster defaults
1278 return self.SimpleFillBE(instance.beparams)
1280 def SimpleFillNIC(self, nicparams):
1281 """Fill a given nicparams dict with cluster defaults.
1283 @type nicparams: dict
1284 @param nicparams: the dict to fill
1286 @return: a copy of the passed in nicparams with missing keys filled
1287 from the cluster defaults
1290 return FillDict(self.nicparams.get(constants.PP_DEFAULT, {}), nicparams)
1292 def SimpleFillOS(self, os_name, os_params):
1293 """Fill an instance's osparams dict with cluster defaults.
1295 @type os_name: string
1296 @param os_name: the OS name to use
1297 @type os_params: dict
1298 @param os_params: the dict to fill with default values
1300 @return: a copy of the instance's osparams with missing keys filled from
1301 the cluster defaults
1304 name_only = os_name.split("+", 1)[0]
1306 result = self.osparams.get(name_only, {})
1308 result = FillDict(result, self.osparams.get(os_name, {}))
1310 return FillDict(result, os_params)
1312 def FillND(self, node, nodegroup):
1313 """Return filled out ndparams for L{objects.NodeGroup} and L{object.Node}
1315 @type node: L{objects.Node}
1316 @param node: A Node object to fill
1317 @type nodegroup: L{objects.NodeGroup}
1318 @param nodegroup: A Node object to fill
1319 @return a copy of the node's ndparams with defaults filled
1322 return self.SimpleFillND(nodegroup.FillND(node))
1324 def SimpleFillND(self, ndparams):
1325 """Fill a given ndparams dict with defaults.
1327 @type ndparams: dict
1328 @param ndparams: the dict to fill
1330 @return: a copy of the passed in ndparams with missing keys filled
1331 from the cluster defaults
1334 return FillDict(self.ndparams, ndparams)
1337 class BlockDevStatus(ConfigObject):
1338 """Config object representing the status of a block device."""
1350 class ImportExportStatus(ConfigObject):
1351 """Config object representing the status of an import or export."""
1357 "progress_throughput",
1365 class ImportExportOptions(ConfigObject):
1366 """Options for import/export daemon
1368 @ivar key_name: X509 key name (None for cluster certificate)
1369 @ivar ca_pem: Remote peer CA in PEM format (None for cluster certificate)
1370 @ivar compress: Compression method (one of L{constants.IEC_ALL})
1371 @ivar magic: Used to ensure the connection goes to the right disk
1372 @ivar ipv6: Whether to use IPv6
1373 @ivar connect_timeout: Number of seconds for establishing connection
1386 class ConfdRequest(ConfigObject):
1387 """Object holding a confd request.
1389 @ivar protocol: confd protocol version
1390 @ivar type: confd query type
1391 @ivar query: query request
1392 @ivar rsalt: requested reply salt
1403 class ConfdReply(ConfigObject):
1404 """Object holding a confd reply.
1406 @ivar protocol: confd protocol version
1407 @ivar status: reply status code (ok, error)
1408 @ivar answer: confd query reply
1409 @ivar serial: configuration serial number
1420 class QueryFieldDefinition(ConfigObject):
1421 """Object holding a query field definition.
1423 @ivar name: Field name
1424 @ivar title: Human-readable title
1425 @ivar kind: Field type
1426 @ivar doc: Human-readable description
1437 class _QueryResponseBase(ConfigObject):
1443 """Custom function for serializing.
1446 mydict = super(_QueryResponseBase, self).ToDict()
1447 mydict["fields"] = self._ContainerToDicts(mydict["fields"])
1451 def FromDict(cls, val):
1452 """Custom function for de-serializing.
1455 obj = super(_QueryResponseBase, cls).FromDict(val)
1456 obj.fields = cls._ContainerFromDicts(obj.fields, list, QueryFieldDefinition)
1460 class QueryRequest(ConfigObject):
1461 """Object holding a query request.
1471 class QueryResponse(_QueryResponseBase):
1472 """Object holding the response to a query.
1474 @ivar fields: List of L{QueryFieldDefinition} objects
1475 @ivar data: Requested data
1483 class QueryFieldsRequest(ConfigObject):
1484 """Object holding a request for querying available fields.
1493 class QueryFieldsResponse(_QueryResponseBase):
1494 """Object holding the response to a query for fields.
1496 @ivar fields: List of L{QueryFieldDefinition} objects
1503 class InstanceConsole(ConfigObject):
1504 """Object describing how to access the console of an instance.
1519 """Validates contents of this object.
1522 assert self.kind in constants.CONS_ALL, "Unknown console type"
1523 assert self.instance, "Missing instance name"
1524 assert self.message or self.kind in [constants.CONS_SSH, constants.CONS_VNC]
1525 assert self.host or self.kind == constants.CONS_MESSAGE
1526 assert self.port or self.kind in [constants.CONS_MESSAGE,
1528 assert self.user or self.kind in [constants.CONS_MESSAGE,
1530 assert self.command or self.kind in [constants.CONS_MESSAGE,
1532 assert self.display or self.kind in [constants.CONS_MESSAGE,
1537 class SerializableConfigParser(ConfigParser.SafeConfigParser):
1538 """Simple wrapper over ConfigParse that allows serialization.
1540 This class is basically ConfigParser.SafeConfigParser with two
1541 additional methods that allow it to serialize/unserialize to/from a
1546 """Dump this instance and return the string representation."""
1549 return buf.getvalue()
1552 def Loads(cls, data):
1553 """Load data from a string."""
1554 buf = StringIO(data)