root / lib / cmdlib / group.py @ 31d3b918
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#
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# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 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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"""Logical units dealing with node groups."""
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import itertools |
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import logging |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import locking |
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from ganeti import objects |
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from ganeti import utils |
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from ganeti.masterd import iallocator |
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from ganeti.cmdlib.base import LogicalUnit, NoHooksLU, ResultWithJobs |
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from ganeti.cmdlib.common import MergeAndVerifyHvState, \ |
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MergeAndVerifyDiskState, GetWantedNodes, GetUpdatedParams, \ |
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CheckNodeGroupInstances, GetUpdatedIPolicy, \ |
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ComputeNewInstanceViolations, GetDefaultIAllocator, ShareAll, \ |
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CheckInstancesNodeGroups, LoadNodeEvacResult, MapInstanceLvsToNodes, \ |
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CheckIpolicyVsDiskTemplates, CheckDiskAccessModeValidity, \ |
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CheckDiskAccessModeConsistency
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import ganeti.masterd.instance |
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class LUGroupAdd(LogicalUnit): |
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"""Logical unit for creating node groups.
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"""
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HPATH = "group-add"
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HTYPE = constants.HTYPE_GROUP |
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REQ_BGL = False
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def ExpandNames(self): |
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# We need the new group's UUID here so that we can create and acquire the
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# corresponding lock. Later, in Exec(), we'll indicate to cfg.AddNodeGroup
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# that it should not check whether the UUID exists in the configuration.
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self.group_uuid = self.cfg.GenerateUniqueID(self.proc.GetECId()) |
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self.needed_locks = {}
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self.add_locks[locking.LEVEL_NODEGROUP] = self.group_uuid |
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def _CheckIpolicy(self): |
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"""Checks the group's ipolicy for consistency and validity.
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"""
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if self.op.ipolicy: |
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cluster = self.cfg.GetClusterInfo()
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full_ipolicy = cluster.SimpleFillIPolicy(self.op.ipolicy)
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try:
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objects.InstancePolicy.CheckParameterSyntax(full_ipolicy, False)
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except errors.ConfigurationError, err:
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raise errors.OpPrereqError("Invalid instance policy: %s" % err, |
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errors.ECODE_INVAL) |
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CheckIpolicyVsDiskTemplates(full_ipolicy, |
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cluster.enabled_disk_templates) |
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def CheckPrereq(self): |
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"""Check prerequisites.
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This checks that the given group name is not an existing node group
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already.
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"""
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try:
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existing_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
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except errors.OpPrereqError:
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pass
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else:
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raise errors.OpPrereqError("Desired group name '%s' already exists as a" |
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" node group (UUID: %s)" %
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(self.op.group_name, existing_uuid),
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errors.ECODE_EXISTS) |
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if self.op.ndparams: |
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utils.ForceDictType(self.op.ndparams, constants.NDS_PARAMETER_TYPES)
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if self.op.hv_state: |
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self.new_hv_state = MergeAndVerifyHvState(self.op.hv_state, None) |
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else:
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self.new_hv_state = None |
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if self.op.disk_state: |
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self.new_disk_state = MergeAndVerifyDiskState(self.op.disk_state, None) |
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else:
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self.new_disk_state = None |
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if self.op.diskparams: |
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for templ in constants.DISK_TEMPLATES: |
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if templ in self.op.diskparams: |
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utils.ForceDictType(self.op.diskparams[templ],
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constants.DISK_DT_TYPES) |
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self.new_diskparams = self.op.diskparams |
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try:
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utils.VerifyDictOptions(self.new_diskparams, constants.DISK_DT_DEFAULTS)
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except errors.OpPrereqError, err:
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raise errors.OpPrereqError("While verify diskparams options: %s" % err, |
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errors.ECODE_INVAL) |
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else:
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self.new_diskparams = {}
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self._CheckIpolicy()
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def BuildHooksEnv(self): |
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"""Build hooks env.
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"""
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return {
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"GROUP_NAME": self.op.group_name, |
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} |
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def BuildHooksNodes(self): |
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"""Build hooks nodes.
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"""
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mn = self.cfg.GetMasterNode()
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return ([mn], [mn])
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def Exec(self, feedback_fn): |
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"""Add the node group to the cluster.
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"""
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group_obj = objects.NodeGroup(name=self.op.group_name, members=[],
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uuid=self.group_uuid,
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alloc_policy=self.op.alloc_policy,
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ndparams=self.op.ndparams,
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diskparams=self.new_diskparams,
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ipolicy=self.op.ipolicy,
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hv_state_static=self.new_hv_state,
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disk_state_static=self.new_disk_state)
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self.cfg.AddNodeGroup(group_obj, self.proc.GetECId(), check_uuid=False) |
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del self.remove_locks[locking.LEVEL_NODEGROUP] |
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class LUGroupAssignNodes(NoHooksLU): |
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"""Logical unit for assigning nodes to groups.
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"""
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REQ_BGL = False
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def ExpandNames(self): |
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# These raise errors.OpPrereqError on their own:
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self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
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(self.op.node_uuids, self.op.nodes) = GetWantedNodes(self, self.op.nodes) |
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# We want to lock all the affected nodes and groups. We have readily
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# available the list of nodes, and the *destination* group. To gather the
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# list of "source" groups, we need to fetch node information later on.
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self.needed_locks = {
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locking.LEVEL_NODEGROUP: set([self.group_uuid]), |
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locking.LEVEL_NODE: self.op.node_uuids,
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} |
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def DeclareLocks(self, level): |
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if level == locking.LEVEL_NODEGROUP:
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assert len(self.needed_locks[locking.LEVEL_NODEGROUP]) == 1 |
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# Try to get all affected nodes' groups without having the group or node
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# lock yet. Needs verification later in the code flow.
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groups = self.cfg.GetNodeGroupsFromNodes(self.op.node_uuids) |
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self.needed_locks[locking.LEVEL_NODEGROUP].update(groups)
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def CheckPrereq(self): |
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"""Check prerequisites.
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"""
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assert self.needed_locks[locking.LEVEL_NODEGROUP] |
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assert (frozenset(self.owned_locks(locking.LEVEL_NODE)) == |
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frozenset(self.op.node_uuids)) |
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expected_locks = (set([self.group_uuid]) | |
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self.cfg.GetNodeGroupsFromNodes(self.op.node_uuids)) |
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actual_locks = self.owned_locks(locking.LEVEL_NODEGROUP)
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if actual_locks != expected_locks:
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raise errors.OpExecError("Nodes changed groups since locks were acquired," |
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" current groups are '%s', used to be '%s'" %
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(utils.CommaJoin(expected_locks), |
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utils.CommaJoin(actual_locks))) |
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self.node_data = self.cfg.GetAllNodesInfo() |
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self.group = self.cfg.GetNodeGroup(self.group_uuid) |
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instance_data = self.cfg.GetAllInstancesInfo()
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if self.group is None: |
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raise errors.OpExecError("Could not retrieve group '%s' (UUID: %s)" % |
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(self.op.group_name, self.group_uuid)) |
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(new_splits, previous_splits) = \ |
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self.CheckAssignmentForSplitInstances([(uuid, self.group_uuid) |
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for uuid in self.op.node_uuids], |
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self.node_data, instance_data)
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if new_splits:
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fmt_new_splits = utils.CommaJoin(utils.NiceSort( |
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self.cfg.GetInstanceNames(new_splits)))
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if not self.op.force: |
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raise errors.OpExecError("The following instances get split by this" |
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" change and --force was not given: %s" %
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fmt_new_splits) |
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else:
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self.LogWarning("This operation will split the following instances: %s", |
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fmt_new_splits) |
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if previous_splits:
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self.LogWarning("In addition, these already-split instances continue" |
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" to be split across groups: %s",
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utils.CommaJoin(utils.NiceSort( |
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self.cfg.GetInstanceNames(previous_splits))))
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def Exec(self, feedback_fn): |
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"""Assign nodes to a new group.
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"""
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mods = [(node_uuid, self.group_uuid) for node_uuid in self.op.node_uuids] |
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self.cfg.AssignGroupNodes(mods)
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@staticmethod
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def CheckAssignmentForSplitInstances(changes, node_data, instance_data): |
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"""Check for split instances after a node assignment.
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This method considers a series of node assignments as an atomic operation,
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and returns information about split instances after applying the set of
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changes.
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In particular, it returns information about newly split instances, and
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instances that were already split, and remain so after the change.
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Only instances whose disk template is listed in constants.DTS_INT_MIRROR are
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considered.
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@type changes: list of (node_uuid, new_group_uuid) pairs.
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@param changes: list of node assignments to consider.
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@param node_data: a dict with data for all nodes
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@param instance_data: a dict with all instances to consider
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@rtype: a two-tuple
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@return: a list of instances that were previously okay and result split as a
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consequence of this change, and a list of instances that were previously
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split and this change does not fix.
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"""
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changed_nodes = dict((uuid, group) for uuid, group in changes |
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if node_data[uuid].group != group)
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all_split_instances = set()
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previously_split_instances = set()
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for inst in instance_data.values(): |
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if inst.disk_template not in constants.DTS_INT_MIRROR: |
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continue
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if len(set(node_data[node_uuid].group |
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for node_uuid in inst.all_nodes)) > 1: |
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previously_split_instances.add(inst.uuid) |
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if len(set(changed_nodes.get(node_uuid, node_data[node_uuid].group) |
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for node_uuid in inst.all_nodes)) > 1: |
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all_split_instances.add(inst.uuid) |
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return (list(all_split_instances - previously_split_instances), |
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list(previously_split_instances & all_split_instances))
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class LUGroupSetParams(LogicalUnit): |
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"""Modifies the parameters of a node group.
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"""
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HPATH = "group-modify"
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HTYPE = constants.HTYPE_GROUP |
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REQ_BGL = False
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def CheckArguments(self): |
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all_changes = [ |
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self.op.ndparams,
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self.op.diskparams,
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self.op.alloc_policy,
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self.op.hv_state,
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self.op.disk_state,
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self.op.ipolicy,
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] |
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if all_changes.count(None) == len(all_changes): |
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raise errors.OpPrereqError("Please pass at least one modification", |
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errors.ECODE_INVAL) |
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if self.op.diskparams: |
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CheckDiskAccessModeValidity(self.op.diskparams)
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def ExpandNames(self): |
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# This raises errors.OpPrereqError on its own:
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self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
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self.needed_locks = {
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locking.LEVEL_INSTANCE: [], |
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locking.LEVEL_NODEGROUP: [self.group_uuid],
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} |
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self.share_locks[locking.LEVEL_INSTANCE] = 1 |
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def DeclareLocks(self, level): |
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if level == locking.LEVEL_INSTANCE:
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assert not self.needed_locks[locking.LEVEL_INSTANCE] |
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# Lock instances optimistically, needs verification once group lock has
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# been acquired
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self.needed_locks[locking.LEVEL_INSTANCE] = \
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self.cfg.GetInstanceNames(
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self.cfg.GetNodeGroupInstances(self.group_uuid)) |
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@staticmethod
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def _UpdateAndVerifyDiskParams(old, new): |
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"""Updates and verifies disk parameters.
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"""
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new_params = GetUpdatedParams(old, new) |
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utils.ForceDictType(new_params, constants.DISK_DT_TYPES) |
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return new_params
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def _CheckIpolicy(self, cluster, owned_instance_names): |
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"""Sanity checks for the ipolicy.
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@type cluster: C{objects.Cluster}
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@param cluster: the cluster's configuration
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@type owned_instance_names: list of string
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@param owned_instance_names: list of instances
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"""
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if self.op.ipolicy: |
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self.new_ipolicy = GetUpdatedIPolicy(self.group.ipolicy, |
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self.op.ipolicy,
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group_policy=True)
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new_ipolicy = cluster.SimpleFillIPolicy(self.new_ipolicy)
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CheckIpolicyVsDiskTemplates(new_ipolicy, |
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cluster.enabled_disk_templates) |
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instances = \ |
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dict(self.cfg.GetMultiInstanceInfoByName(owned_instance_names)) |
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gmi = ganeti.masterd.instance |
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violations = \ |
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ComputeNewInstanceViolations(gmi.CalculateGroupIPolicy(cluster, |
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self.group),
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new_ipolicy, instances.values(), |
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self.cfg)
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if violations:
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self.LogWarning("After the ipolicy change the following instances" |
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" violate them: %s",
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utils.CommaJoin(violations)) |
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def CheckPrereq(self): |
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"""Check prerequisites.
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"""
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owned_instance_names = frozenset(self.owned_locks(locking.LEVEL_INSTANCE)) |
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# Check if locked instances are still correct
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CheckNodeGroupInstances(self.cfg, self.group_uuid, owned_instance_names) |
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self.group = self.cfg.GetNodeGroup(self.group_uuid) |
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cluster = self.cfg.GetClusterInfo()
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if self.group is None: |
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raise errors.OpExecError("Could not retrieve group '%s' (UUID: %s)" % |
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(self.op.group_name, self.group_uuid)) |
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if self.op.ndparams: |
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new_ndparams = GetUpdatedParams(self.group.ndparams, self.op.ndparams) |
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utils.ForceDictType(new_ndparams, constants.NDS_PARAMETER_TYPES) |
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self.new_ndparams = new_ndparams
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if self.op.diskparams: |
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diskparams = self.group.diskparams
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uavdp = self._UpdateAndVerifyDiskParams
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# For each disktemplate subdict update and verify the values
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new_diskparams = dict((dt,
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uavdp(diskparams.get(dt, {}), |
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self.op.diskparams[dt]))
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for dt in constants.DISK_TEMPLATES |
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if dt in self.op.diskparams) |
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# As we've all subdicts of diskparams ready, lets merge the actual
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# dict with all updated subdicts
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self.new_diskparams = objects.FillDict(diskparams, new_diskparams)
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try:
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utils.VerifyDictOptions(self.new_diskparams, constants.DISK_DT_DEFAULTS)
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CheckDiskAccessModeConsistency(self.new_diskparams, self.cfg, |
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group=self.group)
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except errors.OpPrereqError, err:
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raise errors.OpPrereqError("While verify diskparams options: %s" % err, |
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errors.ECODE_INVAL) |
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|
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if self.op.hv_state: |
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self.new_hv_state = MergeAndVerifyHvState(self.op.hv_state, |
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self.group.hv_state_static)
|
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|
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if self.op.disk_state: |
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self.new_disk_state = \
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MergeAndVerifyDiskState(self.op.disk_state,
|
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self.group.disk_state_static)
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self._CheckIpolicy(cluster, owned_instance_names)
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|
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def BuildHooksEnv(self): |
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"""Build hooks env.
|
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|
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"""
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return {
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"GROUP_NAME": self.op.group_name, |
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"NEW_ALLOC_POLICY": self.op.alloc_policy, |
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} |
432 |
|
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def BuildHooksNodes(self): |
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"""Build hooks nodes.
|
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|
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"""
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mn = self.cfg.GetMasterNode()
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return ([mn], [mn])
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|
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def Exec(self, feedback_fn): |
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"""Modifies the node group.
|
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|
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"""
|
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result = [] |
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|
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if self.op.ndparams: |
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self.group.ndparams = self.new_ndparams |
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result.append(("ndparams", str(self.group.ndparams))) |
449 |
|
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if self.op.diskparams: |
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self.group.diskparams = self.new_diskparams |
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result.append(("diskparams", str(self.group.diskparams))) |
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|
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if self.op.alloc_policy: |
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self.group.alloc_policy = self.op.alloc_policy |
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|
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if self.op.hv_state: |
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self.group.hv_state_static = self.new_hv_state |
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|
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if self.op.disk_state: |
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self.group.disk_state_static = self.new_disk_state |
462 |
|
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if self.op.ipolicy: |
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self.group.ipolicy = self.new_ipolicy |
465 |
|
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self.cfg.Update(self.group, feedback_fn) |
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return result
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|
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|
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class LUGroupRemove(LogicalUnit): |
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HPATH = "group-remove"
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HTYPE = constants.HTYPE_GROUP |
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REQ_BGL = False
|
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|
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def ExpandNames(self): |
476 |
# This will raises errors.OpPrereqError on its own:
|
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self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
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self.needed_locks = {
|
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locking.LEVEL_NODEGROUP: [self.group_uuid],
|
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} |
481 |
|
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def CheckPrereq(self): |
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"""Check prerequisites.
|
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|
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This checks that the given group name exists as a node group, that is
|
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empty (i.e., contains no nodes), and that is not the last group of the
|
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cluster.
|
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|
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"""
|
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# Verify that the group is empty.
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group_nodes = [node.uuid |
492 |
for node in self.cfg.GetAllNodesInfo().values() |
493 |
if node.group == self.group_uuid] |
494 |
|
495 |
if group_nodes:
|
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raise errors.OpPrereqError("Group '%s' not empty, has the following" |
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" nodes: %s" %
|
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(self.op.group_name,
|
499 |
utils.CommaJoin(utils.NiceSort(group_nodes))), |
500 |
errors.ECODE_STATE) |
501 |
|
502 |
# Verify the cluster would not be left group-less.
|
503 |
if len(self.cfg.GetNodeGroupList()) == 1: |
504 |
raise errors.OpPrereqError("Group '%s' is the only group, cannot be" |
505 |
" removed" % self.op.group_name, |
506 |
errors.ECODE_STATE) |
507 |
|
508 |
def BuildHooksEnv(self): |
509 |
"""Build hooks env.
|
510 |
|
511 |
"""
|
512 |
return {
|
513 |
"GROUP_NAME": self.op.group_name, |
514 |
} |
515 |
|
516 |
def BuildHooksNodes(self): |
517 |
"""Build hooks nodes.
|
518 |
|
519 |
"""
|
520 |
mn = self.cfg.GetMasterNode()
|
521 |
return ([mn], [mn])
|
522 |
|
523 |
def Exec(self, feedback_fn): |
524 |
"""Remove the node group.
|
525 |
|
526 |
"""
|
527 |
try:
|
528 |
self.cfg.RemoveNodeGroup(self.group_uuid) |
529 |
except errors.ConfigurationError:
|
530 |
raise errors.OpExecError("Group '%s' with UUID %s disappeared" % |
531 |
(self.op.group_name, self.group_uuid)) |
532 |
|
533 |
self.remove_locks[locking.LEVEL_NODEGROUP] = self.group_uuid |
534 |
|
535 |
|
536 |
class LUGroupRename(LogicalUnit): |
537 |
HPATH = "group-rename"
|
538 |
HTYPE = constants.HTYPE_GROUP |
539 |
REQ_BGL = False
|
540 |
|
541 |
def ExpandNames(self): |
542 |
# This raises errors.OpPrereqError on its own:
|
543 |
self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
544 |
|
545 |
self.needed_locks = {
|
546 |
locking.LEVEL_NODEGROUP: [self.group_uuid],
|
547 |
} |
548 |
|
549 |
def CheckPrereq(self): |
550 |
"""Check prerequisites.
|
551 |
|
552 |
Ensures requested new name is not yet used.
|
553 |
|
554 |
"""
|
555 |
try:
|
556 |
new_name_uuid = self.cfg.LookupNodeGroup(self.op.new_name) |
557 |
except errors.OpPrereqError:
|
558 |
pass
|
559 |
else:
|
560 |
raise errors.OpPrereqError("Desired new name '%s' clashes with existing" |
561 |
" node group (UUID: %s)" %
|
562 |
(self.op.new_name, new_name_uuid),
|
563 |
errors.ECODE_EXISTS) |
564 |
|
565 |
def BuildHooksEnv(self): |
566 |
"""Build hooks env.
|
567 |
|
568 |
"""
|
569 |
return {
|
570 |
"OLD_NAME": self.op.group_name, |
571 |
"NEW_NAME": self.op.new_name, |
572 |
} |
573 |
|
574 |
def BuildHooksNodes(self): |
575 |
"""Build hooks nodes.
|
576 |
|
577 |
"""
|
578 |
mn = self.cfg.GetMasterNode()
|
579 |
|
580 |
all_nodes = self.cfg.GetAllNodesInfo()
|
581 |
all_nodes.pop(mn, None)
|
582 |
|
583 |
run_nodes = [mn] |
584 |
run_nodes.extend(node.uuid for node in all_nodes.values() |
585 |
if node.group == self.group_uuid) |
586 |
|
587 |
return (run_nodes, run_nodes)
|
588 |
|
589 |
def Exec(self, feedback_fn): |
590 |
"""Rename the node group.
|
591 |
|
592 |
"""
|
593 |
group = self.cfg.GetNodeGroup(self.group_uuid) |
594 |
|
595 |
if group is None: |
596 |
raise errors.OpExecError("Could not retrieve group '%s' (UUID: %s)" % |
597 |
(self.op.group_name, self.group_uuid)) |
598 |
|
599 |
group.name = self.op.new_name
|
600 |
self.cfg.Update(group, feedback_fn)
|
601 |
|
602 |
return self.op.new_name |
603 |
|
604 |
|
605 |
class LUGroupEvacuate(LogicalUnit): |
606 |
HPATH = "group-evacuate"
|
607 |
HTYPE = constants.HTYPE_GROUP |
608 |
REQ_BGL = False
|
609 |
|
610 |
def ExpandNames(self): |
611 |
# This raises errors.OpPrereqError on its own:
|
612 |
self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
613 |
|
614 |
if self.op.target_groups: |
615 |
self.req_target_uuids = map(self.cfg.LookupNodeGroup, |
616 |
self.op.target_groups)
|
617 |
else:
|
618 |
self.req_target_uuids = []
|
619 |
|
620 |
if self.group_uuid in self.req_target_uuids: |
621 |
raise errors.OpPrereqError("Group to be evacuated (%s) can not be used" |
622 |
" as a target group (targets are %s)" %
|
623 |
(self.group_uuid,
|
624 |
utils.CommaJoin(self.req_target_uuids)),
|
625 |
errors.ECODE_INVAL) |
626 |
|
627 |
self.op.iallocator = GetDefaultIAllocator(self.cfg, self.op.iallocator) |
628 |
|
629 |
self.share_locks = ShareAll()
|
630 |
self.needed_locks = {
|
631 |
locking.LEVEL_INSTANCE: [], |
632 |
locking.LEVEL_NODEGROUP: [], |
633 |
locking.LEVEL_NODE: [], |
634 |
} |
635 |
|
636 |
def DeclareLocks(self, level): |
637 |
if level == locking.LEVEL_INSTANCE:
|
638 |
assert not self.needed_locks[locking.LEVEL_INSTANCE] |
639 |
|
640 |
# Lock instances optimistically, needs verification once node and group
|
641 |
# locks have been acquired
|
642 |
self.needed_locks[locking.LEVEL_INSTANCE] = \
|
643 |
self.cfg.GetInstanceNames(
|
644 |
self.cfg.GetNodeGroupInstances(self.group_uuid)) |
645 |
|
646 |
elif level == locking.LEVEL_NODEGROUP:
|
647 |
assert not self.needed_locks[locking.LEVEL_NODEGROUP] |
648 |
|
649 |
if self.req_target_uuids: |
650 |
lock_groups = set([self.group_uuid] + self.req_target_uuids) |
651 |
|
652 |
# Lock all groups used by instances optimistically; this requires going
|
653 |
# via the node before it's locked, requiring verification later on
|
654 |
lock_groups.update(group_uuid |
655 |
for instance_name in |
656 |
self.owned_locks(locking.LEVEL_INSTANCE)
|
657 |
for group_uuid in |
658 |
self.cfg.GetInstanceNodeGroups(
|
659 |
self.cfg.GetInstanceInfoByName(instance_name)
|
660 |
.uuid)) |
661 |
else:
|
662 |
# No target groups, need to lock all of them
|
663 |
lock_groups = locking.ALL_SET |
664 |
|
665 |
self.needed_locks[locking.LEVEL_NODEGROUP] = lock_groups
|
666 |
|
667 |
elif level == locking.LEVEL_NODE:
|
668 |
# This will only lock the nodes in the group to be evacuated which
|
669 |
# contain actual instances
|
670 |
self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_APPEND
|
671 |
self._LockInstancesNodes()
|
672 |
|
673 |
# Lock all nodes in group to be evacuated and target groups
|
674 |
owned_groups = frozenset(self.owned_locks(locking.LEVEL_NODEGROUP)) |
675 |
assert self.group_uuid in owned_groups |
676 |
member_node_uuids = [node_uuid |
677 |
for group in owned_groups |
678 |
for node_uuid in |
679 |
self.cfg.GetNodeGroup(group).members]
|
680 |
self.needed_locks[locking.LEVEL_NODE].extend(member_node_uuids)
|
681 |
|
682 |
def CheckPrereq(self): |
683 |
owned_instance_names = frozenset(self.owned_locks(locking.LEVEL_INSTANCE)) |
684 |
owned_groups = frozenset(self.owned_locks(locking.LEVEL_NODEGROUP)) |
685 |
owned_node_uuids = frozenset(self.owned_locks(locking.LEVEL_NODE)) |
686 |
|
687 |
assert owned_groups.issuperset(self.req_target_uuids) |
688 |
assert self.group_uuid in owned_groups |
689 |
|
690 |
# Check if locked instances are still correct
|
691 |
CheckNodeGroupInstances(self.cfg, self.group_uuid, owned_instance_names) |
692 |
|
693 |
# Get instance information
|
694 |
self.instances = \
|
695 |
dict(self.cfg.GetMultiInstanceInfoByName(owned_instance_names)) |
696 |
|
697 |
# Check if node groups for locked instances are still correct
|
698 |
CheckInstancesNodeGroups(self.cfg, self.instances, |
699 |
owned_groups, owned_node_uuids, self.group_uuid)
|
700 |
|
701 |
if self.req_target_uuids: |
702 |
# User requested specific target groups
|
703 |
self.target_uuids = self.req_target_uuids |
704 |
else:
|
705 |
# All groups except the one to be evacuated are potential targets
|
706 |
self.target_uuids = [group_uuid for group_uuid in owned_groups |
707 |
if group_uuid != self.group_uuid] |
708 |
|
709 |
if not self.target_uuids: |
710 |
raise errors.OpPrereqError("There are no possible target groups", |
711 |
errors.ECODE_INVAL) |
712 |
|
713 |
def BuildHooksEnv(self): |
714 |
"""Build hooks env.
|
715 |
|
716 |
"""
|
717 |
return {
|
718 |
"GROUP_NAME": self.op.group_name, |
719 |
"TARGET_GROUPS": " ".join(self.target_uuids), |
720 |
} |
721 |
|
722 |
def BuildHooksNodes(self): |
723 |
"""Build hooks nodes.
|
724 |
|
725 |
"""
|
726 |
mn = self.cfg.GetMasterNode()
|
727 |
|
728 |
assert self.group_uuid in self.owned_locks(locking.LEVEL_NODEGROUP) |
729 |
|
730 |
run_nodes = [mn] + self.cfg.GetNodeGroup(self.group_uuid).members |
731 |
|
732 |
return (run_nodes, run_nodes)
|
733 |
|
734 |
def Exec(self, feedback_fn): |
735 |
inst_names = list(self.owned_locks(locking.LEVEL_INSTANCE)) |
736 |
|
737 |
assert self.group_uuid not in self.target_uuids |
738 |
|
739 |
req = iallocator.IAReqGroupChange(instances=inst_names, |
740 |
target_groups=self.target_uuids)
|
741 |
ial = iallocator.IAllocator(self.cfg, self.rpc, req) |
742 |
|
743 |
ial.Run(self.op.iallocator)
|
744 |
|
745 |
if not ial.success: |
746 |
raise errors.OpPrereqError("Can't compute group evacuation using" |
747 |
" iallocator '%s': %s" %
|
748 |
(self.op.iallocator, ial.info),
|
749 |
errors.ECODE_NORES) |
750 |
|
751 |
jobs = LoadNodeEvacResult(self, ial.result, self.op.early_release, False) |
752 |
|
753 |
self.LogInfo("Iallocator returned %s job(s) for evacuating node group %s", |
754 |
len(jobs), self.op.group_name) |
755 |
|
756 |
return ResultWithJobs(jobs)
|
757 |
|
758 |
|
759 |
class LUGroupVerifyDisks(NoHooksLU): |
760 |
"""Verifies the status of all disks in a node group.
|
761 |
|
762 |
"""
|
763 |
REQ_BGL = False
|
764 |
|
765 |
def ExpandNames(self): |
766 |
# Raises errors.OpPrereqError on its own if group can't be found
|
767 |
self.group_uuid = self.cfg.LookupNodeGroup(self.op.group_name) |
768 |
|
769 |
self.share_locks = ShareAll()
|
770 |
self.needed_locks = {
|
771 |
locking.LEVEL_INSTANCE: [], |
772 |
locking.LEVEL_NODEGROUP: [], |
773 |
locking.LEVEL_NODE: [], |
774 |
|
775 |
# This opcode is acquires all node locks in a group. LUClusterVerifyDisks
|
776 |
# starts one instance of this opcode for every group, which means all
|
777 |
# nodes will be locked for a short amount of time, so it's better to
|
778 |
# acquire the node allocation lock as well.
|
779 |
locking.LEVEL_NODE_ALLOC: locking.ALL_SET, |
780 |
} |
781 |
|
782 |
def DeclareLocks(self, level): |
783 |
if level == locking.LEVEL_INSTANCE:
|
784 |
assert not self.needed_locks[locking.LEVEL_INSTANCE] |
785 |
|
786 |
# Lock instances optimistically, needs verification once node and group
|
787 |
# locks have been acquired
|
788 |
self.needed_locks[locking.LEVEL_INSTANCE] = \
|
789 |
self.cfg.GetInstanceNames(
|
790 |
self.cfg.GetNodeGroupInstances(self.group_uuid)) |
791 |
|
792 |
elif level == locking.LEVEL_NODEGROUP:
|
793 |
assert not self.needed_locks[locking.LEVEL_NODEGROUP] |
794 |
|
795 |
self.needed_locks[locking.LEVEL_NODEGROUP] = \
|
796 |
set([self.group_uuid] + |
797 |
# Lock all groups used by instances optimistically; this requires
|
798 |
# going via the node before it's locked, requiring verification
|
799 |
# later on
|
800 |
[group_uuid |
801 |
for instance_name in self.owned_locks(locking.LEVEL_INSTANCE) |
802 |
for group_uuid in |
803 |
self.cfg.GetInstanceNodeGroups(
|
804 |
self.cfg.GetInstanceInfoByName(instance_name).uuid)])
|
805 |
|
806 |
elif level == locking.LEVEL_NODE:
|
807 |
# This will only lock the nodes in the group to be verified which contain
|
808 |
# actual instances
|
809 |
self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_APPEND
|
810 |
self._LockInstancesNodes()
|
811 |
|
812 |
# Lock all nodes in group to be verified
|
813 |
assert self.group_uuid in self.owned_locks(locking.LEVEL_NODEGROUP) |
814 |
member_node_uuids = self.cfg.GetNodeGroup(self.group_uuid).members |
815 |
self.needed_locks[locking.LEVEL_NODE].extend(member_node_uuids)
|
816 |
|
817 |
def CheckPrereq(self): |
818 |
owned_inst_names = frozenset(self.owned_locks(locking.LEVEL_INSTANCE)) |
819 |
owned_groups = frozenset(self.owned_locks(locking.LEVEL_NODEGROUP)) |
820 |
owned_node_uuids = frozenset(self.owned_locks(locking.LEVEL_NODE)) |
821 |
|
822 |
assert self.group_uuid in owned_groups |
823 |
|
824 |
# Check if locked instances are still correct
|
825 |
CheckNodeGroupInstances(self.cfg, self.group_uuid, owned_inst_names) |
826 |
|
827 |
# Get instance information
|
828 |
self.instances = dict(self.cfg.GetMultiInstanceInfoByName(owned_inst_names)) |
829 |
|
830 |
# Check if node groups for locked instances are still correct
|
831 |
CheckInstancesNodeGroups(self.cfg, self.instances, |
832 |
owned_groups, owned_node_uuids, self.group_uuid)
|
833 |
|
834 |
def _VerifyInstanceLvs(self, node_errors, offline_disk_instance_names, |
835 |
missing_disks): |
836 |
node_lv_to_inst = MapInstanceLvsToNodes( |
837 |
[inst for inst in self.instances.values() if inst.disks_active]) |
838 |
if node_lv_to_inst:
|
839 |
node_uuids = utils.NiceSort(set(self.owned_locks(locking.LEVEL_NODE)) & |
840 |
set(self.cfg.GetVmCapableNodeList())) |
841 |
|
842 |
node_lvs = self.rpc.call_lv_list(node_uuids, [])
|
843 |
|
844 |
for (node_uuid, node_res) in node_lvs.items(): |
845 |
if node_res.offline:
|
846 |
continue
|
847 |
|
848 |
msg = node_res.fail_msg |
849 |
if msg:
|
850 |
logging.warning("Error enumerating LVs on node %s: %s",
|
851 |
self.cfg.GetNodeName(node_uuid), msg)
|
852 |
node_errors[node_uuid] = msg |
853 |
continue
|
854 |
|
855 |
for lv_name, (_, _, lv_online) in node_res.payload.items(): |
856 |
inst = node_lv_to_inst.pop((node_uuid, lv_name), None)
|
857 |
if not lv_online and inst is not None: |
858 |
offline_disk_instance_names.add(inst.name) |
859 |
|
860 |
# any leftover items in nv_dict are missing LVs, let's arrange the data
|
861 |
# better
|
862 |
for key, inst in node_lv_to_inst.iteritems(): |
863 |
missing_disks.setdefault(inst.name, []).append(list(key))
|
864 |
|
865 |
def _VerifyDrbdStates(self, node_errors, offline_disk_instance_names): |
866 |
node_to_inst = {} |
867 |
for inst in self.instances.values(): |
868 |
if not inst.disks_active or inst.disk_template != constants.DT_DRBD8: |
869 |
continue
|
870 |
|
871 |
for node_uuid in itertools.chain([inst.primary_node], |
872 |
inst.secondary_nodes): |
873 |
node_to_inst.setdefault(node_uuid, []).append(inst) |
874 |
|
875 |
for (node_uuid, insts) in node_to_inst.items(): |
876 |
node_disks = [(inst.disks, inst) for inst in insts] |
877 |
node_res = self.rpc.call_drbd_needs_activation(node_uuid, node_disks)
|
878 |
msg = node_res.fail_msg |
879 |
if msg:
|
880 |
logging.warning("Error getting DRBD status on node %s: %s",
|
881 |
self.cfg.GetNodeName(node_uuid), msg)
|
882 |
node_errors[node_uuid] = msg |
883 |
continue
|
884 |
|
885 |
faulty_disk_uuids = set(node_res.payload)
|
886 |
for inst in self.instances.values(): |
887 |
inst_disk_uuids = set([disk.uuid for disk in inst.disks]) |
888 |
if inst_disk_uuids.intersection(faulty_disk_uuids):
|
889 |
offline_disk_instance_names.add(inst.name) |
890 |
|
891 |
def Exec(self, feedback_fn): |
892 |
"""Verify integrity of cluster disks.
|
893 |
|
894 |
@rtype: tuple of three items
|
895 |
@return: a tuple of (dict of node-to-node_error, list of instances
|
896 |
which need activate-disks, dict of instance: (node, volume) for
|
897 |
missing volumes
|
898 |
|
899 |
"""
|
900 |
node_errors = {} |
901 |
offline_disk_instance_names = set()
|
902 |
missing_disks = {} |
903 |
|
904 |
self._VerifyInstanceLvs(node_errors, offline_disk_instance_names,
|
905 |
missing_disks) |
906 |
self._VerifyDrbdStates(node_errors, offline_disk_instance_names)
|
907 |
|
908 |
return (node_errors, list(offline_disk_instance_names), missing_disks) |