root / lib / cmdlib / common.py @ d0d7d7cf
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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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"""Common functions used by multiple logical units."""
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import copy |
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import os |
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from ganeti import compat |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import hypervisor |
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from ganeti import locking |
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from ganeti import objects |
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from ganeti import opcodes |
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from ganeti import pathutils |
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from ganeti import rpc |
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from ganeti import ssconf |
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from ganeti import utils |
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# States of instance
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INSTANCE_DOWN = [constants.ADMINST_DOWN] |
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INSTANCE_ONLINE = [constants.ADMINST_DOWN, constants.ADMINST_UP] |
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INSTANCE_NOT_RUNNING = [constants.ADMINST_DOWN, constants.ADMINST_OFFLINE] |
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#: Instance status in which an instance can be marked as offline/online
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CAN_CHANGE_INSTANCE_OFFLINE = (frozenset(INSTANCE_DOWN) | frozenset([ |
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constants.ADMINST_OFFLINE, |
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])) |
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def _ExpandItemName(expand_fn, name, kind): |
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"""Expand an item name.
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@param expand_fn: the function to use for expansion
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@param name: requested item name
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@param kind: text description ('Node' or 'Instance')
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@return: the result of the expand_fn, if successful
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@raise errors.OpPrereqError: if the item is not found
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"""
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full_name = expand_fn(name) |
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if full_name is None: |
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raise errors.OpPrereqError("%s '%s' not known" % (kind, name), |
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errors.ECODE_NOENT) |
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return full_name
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def ExpandInstanceName(cfg, name): |
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"""Wrapper over L{_ExpandItemName} for instance."""
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return _ExpandItemName(cfg.ExpandInstanceName, name, "Instance") |
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def ExpandNodeUuidAndName(cfg, expected_uuid, name): |
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"""Expand a short node name into the node UUID and full name.
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@type cfg: L{config.ConfigWriter}
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@param cfg: The cluster configuration
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@type expected_uuid: string
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@param expected_uuid: expected UUID for the node (or None if there is no
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expectation). If it does not match, a L{errors.OpPrereqError} is
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raised.
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@type name: string
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@param name: the short node name
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"""
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(uuid, full_name) = _ExpandItemName(cfg.ExpandNodeName, name, "Node")
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if expected_uuid is not None and uuid != expected_uuid: |
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raise errors.OpPrereqError(
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"The nodes UUID '%s' does not match the expected UUID '%s' for node"
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" '%s'. Maybe the node changed since you submitted this job." %
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(uuid, expected_uuid, full_name), errors.ECODE_NOTUNIQUE) |
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return (uuid, full_name)
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def ShareAll(): |
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"""Returns a dict declaring all lock levels shared.
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"""
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return dict.fromkeys(locking.LEVELS, 1) |
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def CheckNodeGroupInstances(cfg, group_uuid, owned_instances): |
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"""Checks if the instances in a node group are still correct.
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@type cfg: L{config.ConfigWriter}
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@param cfg: The cluster configuration
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@type group_uuid: string
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@param group_uuid: Node group UUID
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@type owned_instances: set or frozenset
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@param owned_instances: List of currently owned instances
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"""
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wanted_instances = cfg.GetNodeGroupInstances(group_uuid) |
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if owned_instances != wanted_instances:
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raise errors.OpPrereqError("Instances in node group '%s' changed since" |
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" locks were acquired, wanted '%s', have '%s';"
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" retry the operation" %
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(group_uuid, |
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utils.CommaJoin(wanted_instances), |
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utils.CommaJoin(owned_instances)), |
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errors.ECODE_STATE) |
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return wanted_instances
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def GetWantedNodes(lu, short_node_names): |
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"""Returns list of checked and expanded node names.
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@type lu: L{LogicalUnit}
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@param lu: the logical unit on whose behalf we execute
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@type short_node_names: list
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@param short_node_names: list of node names or None for all nodes
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@rtype: tuple of lists
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@return: tupe with (list of node UUIDs, list of node names)
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@raise errors.ProgrammerError: if the nodes parameter is wrong type
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"""
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if short_node_names:
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node_uuids = [ExpandNodeUuidAndName(lu.cfg, None, name)[0] |
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for name in short_node_names] |
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else:
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node_uuids = lu.cfg.GetNodeList() |
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return (node_uuids, [lu.cfg.GetNodeInfo(uuid).name for uuid in node_uuids]) |
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def GetWantedInstances(lu, instances): |
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"""Returns list of checked and expanded instance names.
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@type lu: L{LogicalUnit}
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@param lu: the logical unit on whose behalf we execute
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@type instances: list
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@param instances: list of instance names or None for all instances
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@rtype: list
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@return: the list of instances, sorted
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@raise errors.OpPrereqError: if the instances parameter is wrong type
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@raise errors.OpPrereqError: if any of the passed instances is not found
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"""
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if instances:
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wanted = [ExpandInstanceName(lu.cfg, name) for name in instances] |
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else:
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wanted = utils.NiceSort(lu.cfg.GetInstanceList()) |
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return wanted
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def RunPostHook(lu, node_name): |
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"""Runs the post-hook for an opcode on a single node.
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"""
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hm = lu.proc.BuildHooksManager(lu) |
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try:
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hm.RunPhase(constants.HOOKS_PHASE_POST, node_names=[node_name]) |
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except Exception, err: # pylint: disable=W0703 |
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lu.LogWarning("Errors occurred running hooks on %s: %s",
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node_name, err) |
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def RedistributeAncillaryFiles(lu): |
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"""Distribute additional files which are part of the cluster configuration.
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ConfigWriter takes care of distributing the config and ssconf files, but
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there are more files which should be distributed to all nodes. This function
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makes sure those are copied.
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"""
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# Gather target nodes
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cluster = lu.cfg.GetClusterInfo() |
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master_info = lu.cfg.GetNodeInfo(lu.cfg.GetMasterNode()) |
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online_node_uuids = lu.cfg.GetOnlineNodeList() |
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online_node_uuid_set = frozenset(online_node_uuids)
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vm_node_uuids = list(online_node_uuid_set.intersection(
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lu.cfg.GetVmCapableNodeList())) |
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# Never distribute to master node
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for node_uuids in [online_node_uuids, vm_node_uuids]: |
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if master_info.uuid in node_uuids: |
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node_uuids.remove(master_info.uuid) |
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# Gather file lists
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(files_all, _, files_mc, files_vm) = \ |
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ComputeAncillaryFiles(cluster, True)
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# Never re-distribute configuration file from here
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assert not (pathutils.CLUSTER_CONF_FILE in files_all or |
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pathutils.CLUSTER_CONF_FILE in files_vm)
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assert not files_mc, "Master candidates not handled in this function" |
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filemap = [ |
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(online_node_uuids, files_all), |
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(vm_node_uuids, files_vm), |
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] |
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# Upload the files
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for (node_uuids, files) in filemap: |
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for fname in files: |
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UploadHelper(lu, node_uuids, fname) |
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def ComputeAncillaryFiles(cluster, redist): |
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"""Compute files external to Ganeti which need to be consistent.
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@type redist: boolean
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@param redist: Whether to include files which need to be redistributed
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"""
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# Compute files for all nodes
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files_all = set([
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pathutils.SSH_KNOWN_HOSTS_FILE, |
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pathutils.CONFD_HMAC_KEY, |
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pathutils.CLUSTER_DOMAIN_SECRET_FILE, |
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pathutils.SPICE_CERT_FILE, |
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pathutils.SPICE_CACERT_FILE, |
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pathutils.RAPI_USERS_FILE, |
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]) |
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if redist:
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# we need to ship at least the RAPI certificate
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files_all.add(pathutils.RAPI_CERT_FILE) |
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else:
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files_all.update(pathutils.ALL_CERT_FILES) |
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files_all.update(ssconf.SimpleStore().GetFileList()) |
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if cluster.modify_etc_hosts:
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files_all.add(pathutils.ETC_HOSTS) |
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if cluster.use_external_mip_script:
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files_all.add(pathutils.EXTERNAL_MASTER_SETUP_SCRIPT) |
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# Files which are optional, these must:
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# - be present in one other category as well
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# - either exist or not exist on all nodes of that category (mc, vm all)
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files_opt = set([
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pathutils.RAPI_USERS_FILE, |
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]) |
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# Files which should only be on master candidates
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files_mc = set()
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if not redist: |
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files_mc.add(pathutils.CLUSTER_CONF_FILE) |
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# File storage
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if (not redist and (constants.ENABLE_FILE_STORAGE or |
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constants.ENABLE_SHARED_FILE_STORAGE)): |
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files_all.add(pathutils.FILE_STORAGE_PATHS_FILE) |
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files_opt.add(pathutils.FILE_STORAGE_PATHS_FILE) |
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# Files which should only be on VM-capable nodes
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files_vm = set(
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filename |
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for hv_name in cluster.enabled_hypervisors |
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for filename in |
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hypervisor.GetHypervisorClass(hv_name).GetAncillaryFiles()[0])
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files_opt |= set(
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filename |
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for hv_name in cluster.enabled_hypervisors |
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for filename in |
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hypervisor.GetHypervisorClass(hv_name).GetAncillaryFiles()[1])
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# Filenames in each category must be unique
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all_files_set = files_all | files_mc | files_vm |
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assert (len(all_files_set) == |
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sum(map(len, [files_all, files_mc, files_vm]))), \ |
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"Found file listed in more than one file list"
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# Optional files must be present in one other category
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assert all_files_set.issuperset(files_opt), \
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"Optional file not in a different required list"
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# This one file should never ever be re-distributed via RPC
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assert not (redist and |
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pathutils.FILE_STORAGE_PATHS_FILE in all_files_set)
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return (files_all, files_opt, files_mc, files_vm)
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def UploadHelper(lu, node_uuids, fname): |
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"""Helper for uploading a file and showing warnings.
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"""
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if os.path.exists(fname):
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result = lu.rpc.call_upload_file(node_uuids, fname) |
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for to_node_uuids, to_result in result.items(): |
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msg = to_result.fail_msg |
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if msg:
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msg = ("Copy of file %s to node %s failed: %s" %
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(fname, lu.cfg.GetNodeName(to_node_uuids), msg)) |
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lu.LogWarning(msg) |
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def MergeAndVerifyHvState(op_input, obj_input): |
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"""Combines the hv state from an opcode with the one of the object
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@param op_input: The input dict from the opcode
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@param obj_input: The input dict from the objects
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@return: The verified and updated dict
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"""
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if op_input:
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invalid_hvs = set(op_input) - constants.HYPER_TYPES
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if invalid_hvs:
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raise errors.OpPrereqError("Invalid hypervisor(s) in hypervisor state:" |
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" %s" % utils.CommaJoin(invalid_hvs),
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errors.ECODE_INVAL) |
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if obj_input is None: |
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obj_input = {} |
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type_check = constants.HVSTS_PARAMETER_TYPES |
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return _UpdateAndVerifySubDict(obj_input, op_input, type_check)
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return None |
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def MergeAndVerifyDiskState(op_input, obj_input): |
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"""Combines the disk state from an opcode with the one of the object
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@param op_input: The input dict from the opcode
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@param obj_input: The input dict from the objects
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@return: The verified and updated dict
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"""
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if op_input:
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invalid_dst = set(op_input) - constants.DS_VALID_TYPES
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if invalid_dst:
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raise errors.OpPrereqError("Invalid storage type(s) in disk state: %s" % |
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utils.CommaJoin(invalid_dst), |
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errors.ECODE_INVAL) |
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type_check = constants.DSS_PARAMETER_TYPES |
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if obj_input is None: |
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obj_input = {} |
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return dict((key, _UpdateAndVerifySubDict(obj_input.get(key, {}), value, |
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type_check)) |
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for key, value in op_input.items()) |
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return None |
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def CheckOSParams(lu, required, node_uuids, osname, osparams): |
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"""OS parameters validation.
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@type lu: L{LogicalUnit}
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@param lu: the logical unit for which we check
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@type required: boolean
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@param required: whether the validation should fail if the OS is not
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found
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@type node_uuids: list
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@param node_uuids: the list of nodes on which we should check
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@type osname: string
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@param osname: the name of the hypervisor we should use
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@type osparams: dict
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@param osparams: the parameters which we need to check
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@raise errors.OpPrereqError: if the parameters are not valid
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"""
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node_uuids = _FilterVmNodes(lu, node_uuids) |
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result = lu.rpc.call_os_validate(node_uuids, required, osname, |
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[constants.OS_VALIDATE_PARAMETERS], |
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osparams) |
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for node_uuid, nres in result.items(): |
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# we don't check for offline cases since this should be run only
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# against the master node and/or an instance's nodes
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nres.Raise("OS Parameters validation failed on node %s" %
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lu.cfg.GetNodeName(node_uuid)) |
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if not nres.payload: |
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lu.LogInfo("OS %s not found on node %s, validation skipped",
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osname, lu.cfg.GetNodeName(node_uuid)) |
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def CheckHVParams(lu, node_uuids, hvname, hvparams): |
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"""Hypervisor parameter validation.
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This function abstract the hypervisor parameter validation to be
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used in both instance create and instance modify.
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@type lu: L{LogicalUnit}
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@param lu: the logical unit for which we check
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@type node_uuids: list
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@param node_uuids: the list of nodes on which we should check
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@type hvname: string
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@param hvname: the name of the hypervisor we should use
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@type hvparams: dict
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@param hvparams: the parameters which we need to check
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@raise errors.OpPrereqError: if the parameters are not valid
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"""
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node_uuids = _FilterVmNodes(lu, node_uuids) |
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cluster = lu.cfg.GetClusterInfo() |
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hvfull = objects.FillDict(cluster.hvparams.get(hvname, {}), hvparams) |
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hvinfo = lu.rpc.call_hypervisor_validate_params(node_uuids, hvname, hvfull) |
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for node_uuid in node_uuids: |
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info = hvinfo[node_uuid] |
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if info.offline:
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continue
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info.Raise("Hypervisor parameter validation failed on node %s" %
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lu.cfg.GetNodeName(node_uuid)) |
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|
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|
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def AdjustCandidatePool(lu, exceptions): |
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"""Adjust the candidate pool after node operations.
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"""
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mod_list = lu.cfg.MaintainCandidatePool(exceptions) |
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if mod_list:
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lu.LogInfo("Promoted nodes to master candidate role: %s",
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utils.CommaJoin(node.name for node in mod_list)) |
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for node in mod_list: |
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lu.context.ReaddNode(node) |
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mc_now, mc_max, _ = lu.cfg.GetMasterCandidateStats(exceptions) |
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if mc_now > mc_max:
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lu.LogInfo("Note: more nodes are candidates (%d) than desired (%d)" %
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(mc_now, mc_max)) |
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|
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def CheckNodePVs(nresult, exclusive_storage): |
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"""Check node PVs.
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"""
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pvlist_dict = nresult.get(constants.NV_PVLIST, None)
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if pvlist_dict is None: |
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return (["Can't get PV list from node"], None) |
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pvlist = map(objects.LvmPvInfo.FromDict, pvlist_dict)
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errlist = [] |
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# check that ':' is not present in PV names, since it's a
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# special character for lvcreate (denotes the range of PEs to
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# use on the PV)
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for pv in pvlist: |
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if ":" in pv.name: |
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errlist.append("Invalid character ':' in PV '%s' of VG '%s'" %
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(pv.name, pv.vg_name)) |
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es_pvinfo = None
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if exclusive_storage:
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(errmsgs, es_pvinfo) = utils.LvmExclusiveCheckNodePvs(pvlist) |
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errlist.extend(errmsgs) |
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shared_pvs = nresult.get(constants.NV_EXCLUSIVEPVS, None)
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if shared_pvs:
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for (pvname, lvlist) in shared_pvs: |
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# TODO: Check that LVs are really unrelated (snapshots, DRBD meta...)
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errlist.append("PV %s is shared among unrelated LVs (%s)" %
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(pvname, utils.CommaJoin(lvlist))) |
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return (errlist, es_pvinfo)
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|
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|
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def _ComputeMinMaxSpec(name, qualifier, ispecs, value): |
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"""Computes if value is in the desired range.
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|
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@param name: name of the parameter for which we perform the check
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@param qualifier: a qualifier used in the error message (e.g. 'disk/1',
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not just 'disk')
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@param ispecs: dictionary containing min and max values
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@param value: actual value that we want to use
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@return: None or an error string
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|
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"""
|
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if value in [None, constants.VALUE_AUTO]: |
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return None |
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max_v = ispecs[constants.ISPECS_MAX].get(name, value) |
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min_v = ispecs[constants.ISPECS_MIN].get(name, value) |
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if value > max_v or min_v > value: |
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if qualifier:
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fqn = "%s/%s" % (name, qualifier)
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else:
|
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fqn = name |
486 |
return ("%s value %s is not in range [%s, %s]" % |
487 |
(fqn, value, min_v, max_v)) |
488 |
return None |
489 |
|
490 |
|
491 |
def ComputeIPolicySpecViolation(ipolicy, mem_size, cpu_count, disk_count, |
492 |
nic_count, disk_sizes, spindle_use, |
493 |
disk_template, |
494 |
_compute_fn=_ComputeMinMaxSpec): |
495 |
"""Verifies ipolicy against provided specs.
|
496 |
|
497 |
@type ipolicy: dict
|
498 |
@param ipolicy: The ipolicy
|
499 |
@type mem_size: int
|
500 |
@param mem_size: The memory size
|
501 |
@type cpu_count: int
|
502 |
@param cpu_count: Used cpu cores
|
503 |
@type disk_count: int
|
504 |
@param disk_count: Number of disks used
|
505 |
@type nic_count: int
|
506 |
@param nic_count: Number of nics used
|
507 |
@type disk_sizes: list of ints
|
508 |
@param disk_sizes: Disk sizes of used disk (len must match C{disk_count})
|
509 |
@type spindle_use: int
|
510 |
@param spindle_use: The number of spindles this instance uses
|
511 |
@type disk_template: string
|
512 |
@param disk_template: The disk template of the instance
|
513 |
@param _compute_fn: The compute function (unittest only)
|
514 |
@return: A list of violations, or an empty list of no violations are found
|
515 |
|
516 |
"""
|
517 |
assert disk_count == len(disk_sizes) |
518 |
|
519 |
test_settings = [ |
520 |
(constants.ISPEC_MEM_SIZE, "", mem_size),
|
521 |
(constants.ISPEC_CPU_COUNT, "", cpu_count),
|
522 |
(constants.ISPEC_NIC_COUNT, "", nic_count),
|
523 |
(constants.ISPEC_SPINDLE_USE, "", spindle_use),
|
524 |
] + [(constants.ISPEC_DISK_SIZE, str(idx), d)
|
525 |
for idx, d in enumerate(disk_sizes)] |
526 |
if disk_template != constants.DT_DISKLESS:
|
527 |
# This check doesn't make sense for diskless instances
|
528 |
test_settings.append((constants.ISPEC_DISK_COUNT, "", disk_count))
|
529 |
ret = [] |
530 |
allowed_dts = ipolicy[constants.IPOLICY_DTS] |
531 |
if disk_template not in allowed_dts: |
532 |
ret.append("Disk template %s is not allowed (allowed templates: %s)" %
|
533 |
(disk_template, utils.CommaJoin(allowed_dts))) |
534 |
|
535 |
min_errs = None
|
536 |
for minmax in ipolicy[constants.ISPECS_MINMAX]: |
537 |
errs = filter(None, |
538 |
(_compute_fn(name, qualifier, minmax, value) |
539 |
for (name, qualifier, value) in test_settings)) |
540 |
if min_errs is None or len(errs) < len(min_errs): |
541 |
min_errs = errs |
542 |
assert min_errs is not None |
543 |
return ret + min_errs
|
544 |
|
545 |
|
546 |
def ComputeIPolicyInstanceViolation(ipolicy, instance, cfg, |
547 |
_compute_fn=ComputeIPolicySpecViolation): |
548 |
"""Compute if instance meets the specs of ipolicy.
|
549 |
|
550 |
@type ipolicy: dict
|
551 |
@param ipolicy: The ipolicy to verify against
|
552 |
@type instance: L{objects.Instance}
|
553 |
@param instance: The instance to verify
|
554 |
@type cfg: L{config.ConfigWriter}
|
555 |
@param cfg: Cluster configuration
|
556 |
@param _compute_fn: The function to verify ipolicy (unittest only)
|
557 |
@see: L{ComputeIPolicySpecViolation}
|
558 |
|
559 |
"""
|
560 |
ret = [] |
561 |
be_full = cfg.GetClusterInfo().FillBE(instance) |
562 |
mem_size = be_full[constants.BE_MAXMEM] |
563 |
cpu_count = be_full[constants.BE_VCPUS] |
564 |
es_flags = rpc.GetExclusiveStorageForNodes(cfg, instance.all_nodes) |
565 |
if any(es_flags.values()): |
566 |
# With exclusive storage use the actual spindles
|
567 |
try:
|
568 |
spindle_use = sum([disk.spindles for disk in instance.disks]) |
569 |
except TypeError: |
570 |
ret.append("Number of spindles not configured for disks of instance %s"
|
571 |
" while exclusive storage is enabled, try running gnt-cluster"
|
572 |
" repair-disk-sizes" % instance.name)
|
573 |
# _ComputeMinMaxSpec ignores 'None's
|
574 |
spindle_use = None
|
575 |
else:
|
576 |
spindle_use = be_full[constants.BE_SPINDLE_USE] |
577 |
disk_count = len(instance.disks)
|
578 |
disk_sizes = [disk.size for disk in instance.disks] |
579 |
nic_count = len(instance.nics)
|
580 |
disk_template = instance.disk_template |
581 |
|
582 |
return ret + _compute_fn(ipolicy, mem_size, cpu_count, disk_count, nic_count,
|
583 |
disk_sizes, spindle_use, disk_template) |
584 |
|
585 |
|
586 |
def _ComputeViolatingInstances(ipolicy, instances, cfg): |
587 |
"""Computes a set of instances who violates given ipolicy.
|
588 |
|
589 |
@param ipolicy: The ipolicy to verify
|
590 |
@type instances: L{objects.Instance}
|
591 |
@param instances: List of instances to verify
|
592 |
@type cfg: L{config.ConfigWriter}
|
593 |
@param cfg: Cluster configuration
|
594 |
@return: A frozenset of instance names violating the ipolicy
|
595 |
|
596 |
"""
|
597 |
return frozenset([inst.name for inst in instances |
598 |
if ComputeIPolicyInstanceViolation(ipolicy, inst, cfg)])
|
599 |
|
600 |
|
601 |
def ComputeNewInstanceViolations(old_ipolicy, new_ipolicy, instances, cfg): |
602 |
"""Computes a set of any instances that would violate the new ipolicy.
|
603 |
|
604 |
@param old_ipolicy: The current (still in-place) ipolicy
|
605 |
@param new_ipolicy: The new (to become) ipolicy
|
606 |
@param instances: List of instances to verify
|
607 |
@type cfg: L{config.ConfigWriter}
|
608 |
@param cfg: Cluster configuration
|
609 |
@return: A list of instances which violates the new ipolicy but
|
610 |
did not before
|
611 |
|
612 |
"""
|
613 |
return (_ComputeViolatingInstances(new_ipolicy, instances, cfg) -
|
614 |
_ComputeViolatingInstances(old_ipolicy, instances, cfg)) |
615 |
|
616 |
|
617 |
def GetUpdatedParams(old_params, update_dict, |
618 |
use_default=True, use_none=False): |
619 |
"""Return the new version of a parameter dictionary.
|
620 |
|
621 |
@type old_params: dict
|
622 |
@param old_params: old parameters
|
623 |
@type update_dict: dict
|
624 |
@param update_dict: dict containing new parameter values, or
|
625 |
constants.VALUE_DEFAULT to reset the parameter to its default
|
626 |
value
|
627 |
@param use_default: boolean
|
628 |
@type use_default: whether to recognise L{constants.VALUE_DEFAULT}
|
629 |
values as 'to be deleted' values
|
630 |
@param use_none: boolean
|
631 |
@type use_none: whether to recognise C{None} values as 'to be
|
632 |
deleted' values
|
633 |
@rtype: dict
|
634 |
@return: the new parameter dictionary
|
635 |
|
636 |
"""
|
637 |
params_copy = copy.deepcopy(old_params) |
638 |
for key, val in update_dict.iteritems(): |
639 |
if ((use_default and val == constants.VALUE_DEFAULT) or |
640 |
(use_none and val is None)): |
641 |
try:
|
642 |
del params_copy[key]
|
643 |
except KeyError: |
644 |
pass
|
645 |
else:
|
646 |
params_copy[key] = val |
647 |
return params_copy
|
648 |
|
649 |
|
650 |
def GetUpdatedIPolicy(old_ipolicy, new_ipolicy, group_policy=False): |
651 |
"""Return the new version of an instance policy.
|
652 |
|
653 |
@param group_policy: whether this policy applies to a group and thus
|
654 |
we should support removal of policy entries
|
655 |
|
656 |
"""
|
657 |
ipolicy = copy.deepcopy(old_ipolicy) |
658 |
for key, value in new_ipolicy.items(): |
659 |
if key not in constants.IPOLICY_ALL_KEYS: |
660 |
raise errors.OpPrereqError("Invalid key in new ipolicy: %s" % key, |
661 |
errors.ECODE_INVAL) |
662 |
if (not value or value == [constants.VALUE_DEFAULT] or |
663 |
value == constants.VALUE_DEFAULT): |
664 |
if group_policy:
|
665 |
if key in ipolicy: |
666 |
del ipolicy[key]
|
667 |
else:
|
668 |
raise errors.OpPrereqError("Can't unset ipolicy attribute '%s'" |
669 |
" on the cluster'" % key,
|
670 |
errors.ECODE_INVAL) |
671 |
else:
|
672 |
if key in constants.IPOLICY_PARAMETERS: |
673 |
# FIXME: we assume all such values are float
|
674 |
try:
|
675 |
ipolicy[key] = float(value)
|
676 |
except (TypeError, ValueError), err: |
677 |
raise errors.OpPrereqError("Invalid value for attribute" |
678 |
" '%s': '%s', error: %s" %
|
679 |
(key, value, err), errors.ECODE_INVAL) |
680 |
elif key == constants.ISPECS_MINMAX:
|
681 |
for minmax in value: |
682 |
for k in minmax.keys(): |
683 |
utils.ForceDictType(minmax[k], constants.ISPECS_PARAMETER_TYPES) |
684 |
ipolicy[key] = value |
685 |
elif key == constants.ISPECS_STD:
|
686 |
if group_policy:
|
687 |
msg = "%s cannot appear in group instance specs" % key
|
688 |
raise errors.OpPrereqError(msg, errors.ECODE_INVAL)
|
689 |
ipolicy[key] = GetUpdatedParams(old_ipolicy.get(key, {}), value, |
690 |
use_none=False, use_default=False) |
691 |
utils.ForceDictType(ipolicy[key], constants.ISPECS_PARAMETER_TYPES) |
692 |
else:
|
693 |
# FIXME: we assume all others are lists; this should be redone
|
694 |
# in a nicer way
|
695 |
ipolicy[key] = list(value)
|
696 |
try:
|
697 |
objects.InstancePolicy.CheckParameterSyntax(ipolicy, not group_policy)
|
698 |
except errors.ConfigurationError, err:
|
699 |
raise errors.OpPrereqError("Invalid instance policy: %s" % err, |
700 |
errors.ECODE_INVAL) |
701 |
return ipolicy
|
702 |
|
703 |
|
704 |
def AnnotateDiskParams(instance, devs, cfg): |
705 |
"""Little helper wrapper to the rpc annotation method.
|
706 |
|
707 |
@param instance: The instance object
|
708 |
@type devs: List of L{objects.Disk}
|
709 |
@param devs: The root devices (not any of its children!)
|
710 |
@param cfg: The config object
|
711 |
@returns The annotated disk copies
|
712 |
@see L{rpc.AnnotateDiskParams}
|
713 |
|
714 |
"""
|
715 |
return rpc.AnnotateDiskParams(instance.disk_template, devs,
|
716 |
cfg.GetInstanceDiskParams(instance)) |
717 |
|
718 |
|
719 |
def SupportsOob(cfg, node): |
720 |
"""Tells if node supports OOB.
|
721 |
|
722 |
@type cfg: L{config.ConfigWriter}
|
723 |
@param cfg: The cluster configuration
|
724 |
@type node: L{objects.Node}
|
725 |
@param node: The node
|
726 |
@return: The OOB script if supported or an empty string otherwise
|
727 |
|
728 |
"""
|
729 |
return cfg.GetNdParams(node)[constants.ND_OOB_PROGRAM]
|
730 |
|
731 |
|
732 |
def _UpdateAndVerifySubDict(base, updates, type_check): |
733 |
"""Updates and verifies a dict with sub dicts of the same type.
|
734 |
|
735 |
@param base: The dict with the old data
|
736 |
@param updates: The dict with the new data
|
737 |
@param type_check: Dict suitable to ForceDictType to verify correct types
|
738 |
@returns: A new dict with updated and verified values
|
739 |
|
740 |
"""
|
741 |
def fn(old, value): |
742 |
new = GetUpdatedParams(old, value) |
743 |
utils.ForceDictType(new, type_check) |
744 |
return new
|
745 |
|
746 |
ret = copy.deepcopy(base) |
747 |
ret.update(dict((key, fn(base.get(key, {}), value))
|
748 |
for key, value in updates.items())) |
749 |
return ret
|
750 |
|
751 |
|
752 |
def _FilterVmNodes(lu, node_uuids): |
753 |
"""Filters out non-vm_capable nodes from a list.
|
754 |
|
755 |
@type lu: L{LogicalUnit}
|
756 |
@param lu: the logical unit for which we check
|
757 |
@type node_uuids: list
|
758 |
@param node_uuids: the list of nodes on which we should check
|
759 |
@rtype: list
|
760 |
@return: the list of vm-capable nodes
|
761 |
|
762 |
"""
|
763 |
vm_nodes = frozenset(lu.cfg.GetNonVmCapableNodeList())
|
764 |
return [uuid for uuid in node_uuids if uuid not in vm_nodes] |
765 |
|
766 |
|
767 |
def GetDefaultIAllocator(cfg, ialloc): |
768 |
"""Decides on which iallocator to use.
|
769 |
|
770 |
@type cfg: L{config.ConfigWriter}
|
771 |
@param cfg: Cluster configuration object
|
772 |
@type ialloc: string or None
|
773 |
@param ialloc: Iallocator specified in opcode
|
774 |
@rtype: string
|
775 |
@return: Iallocator name
|
776 |
|
777 |
"""
|
778 |
if not ialloc: |
779 |
# Use default iallocator
|
780 |
ialloc = cfg.GetDefaultIAllocator() |
781 |
|
782 |
if not ialloc: |
783 |
raise errors.OpPrereqError("No iallocator was specified, neither in the" |
784 |
" opcode nor as a cluster-wide default",
|
785 |
errors.ECODE_INVAL) |
786 |
|
787 |
return ialloc
|
788 |
|
789 |
|
790 |
def CheckInstancesNodeGroups(cfg, instances, owned_groups, owned_node_uuids, |
791 |
cur_group_uuid): |
792 |
"""Checks if node groups for locked instances are still correct.
|
793 |
|
794 |
@type cfg: L{config.ConfigWriter}
|
795 |
@param cfg: Cluster configuration
|
796 |
@type instances: dict; string as key, L{objects.Instance} as value
|
797 |
@param instances: Dictionary, instance name as key, instance object as value
|
798 |
@type owned_groups: iterable of string
|
799 |
@param owned_groups: List of owned groups
|
800 |
@type owned_node_uuids: iterable of string
|
801 |
@param owned_node_uuids: List of owned nodes
|
802 |
@type cur_group_uuid: string or None
|
803 |
@param cur_group_uuid: Optional group UUID to check against instance's groups
|
804 |
|
805 |
"""
|
806 |
for (name, inst) in instances.items(): |
807 |
assert owned_node_uuids.issuperset(inst.all_nodes), \
|
808 |
"Instance %s's nodes changed while we kept the lock" % name
|
809 |
|
810 |
inst_groups = CheckInstanceNodeGroups(cfg, name, owned_groups) |
811 |
|
812 |
assert cur_group_uuid is None or cur_group_uuid in inst_groups, \ |
813 |
"Instance %s has no node in group %s" % (name, cur_group_uuid)
|
814 |
|
815 |
|
816 |
def CheckInstanceNodeGroups(cfg, instance_name, owned_groups, |
817 |
primary_only=False):
|
818 |
"""Checks if the owned node groups are still correct for an instance.
|
819 |
|
820 |
@type cfg: L{config.ConfigWriter}
|
821 |
@param cfg: The cluster configuration
|
822 |
@type instance_name: string
|
823 |
@param instance_name: Instance name
|
824 |
@type owned_groups: set or frozenset
|
825 |
@param owned_groups: List of currently owned node groups
|
826 |
@type primary_only: boolean
|
827 |
@param primary_only: Whether to check node groups for only the primary node
|
828 |
|
829 |
"""
|
830 |
inst_groups = cfg.GetInstanceNodeGroups(instance_name, primary_only) |
831 |
|
832 |
if not owned_groups.issuperset(inst_groups): |
833 |
raise errors.OpPrereqError("Instance %s's node groups changed since" |
834 |
" locks were acquired, current groups are"
|
835 |
" are '%s', owning groups '%s'; retry the"
|
836 |
" operation" %
|
837 |
(instance_name, |
838 |
utils.CommaJoin(inst_groups), |
839 |
utils.CommaJoin(owned_groups)), |
840 |
errors.ECODE_STATE) |
841 |
|
842 |
return inst_groups
|
843 |
|
844 |
|
845 |
def LoadNodeEvacResult(lu, alloc_result, early_release, use_nodes): |
846 |
"""Unpacks the result of change-group and node-evacuate iallocator requests.
|
847 |
|
848 |
Iallocator modes L{constants.IALLOCATOR_MODE_NODE_EVAC} and
|
849 |
L{constants.IALLOCATOR_MODE_CHG_GROUP}.
|
850 |
|
851 |
@type lu: L{LogicalUnit}
|
852 |
@param lu: Logical unit instance
|
853 |
@type alloc_result: tuple/list
|
854 |
@param alloc_result: Result from iallocator
|
855 |
@type early_release: bool
|
856 |
@param early_release: Whether to release locks early if possible
|
857 |
@type use_nodes: bool
|
858 |
@param use_nodes: Whether to display node names instead of groups
|
859 |
|
860 |
"""
|
861 |
(moved, failed, jobs) = alloc_result |
862 |
|
863 |
if failed:
|
864 |
failreason = utils.CommaJoin("%s (%s)" % (name, reason)
|
865 |
for (name, reason) in failed) |
866 |
lu.LogWarning("Unable to evacuate instances %s", failreason)
|
867 |
raise errors.OpExecError("Unable to evacuate instances %s" % failreason) |
868 |
|
869 |
if moved:
|
870 |
lu.LogInfo("Instances to be moved: %s",
|
871 |
utils.CommaJoin( |
872 |
"%s (to %s)" %
|
873 |
(name, _NodeEvacDest(use_nodes, group, node_names)) |
874 |
for (name, group, node_names) in moved)) |
875 |
|
876 |
return [map(compat.partial(_SetOpEarlyRelease, early_release), |
877 |
map(opcodes.OpCode.LoadOpCode, ops))
|
878 |
for ops in jobs] |
879 |
|
880 |
|
881 |
def _NodeEvacDest(use_nodes, group, node_names): |
882 |
"""Returns group or nodes depending on caller's choice.
|
883 |
|
884 |
"""
|
885 |
if use_nodes:
|
886 |
return utils.CommaJoin(node_names)
|
887 |
else:
|
888 |
return group
|
889 |
|
890 |
|
891 |
def _SetOpEarlyRelease(early_release, op): |
892 |
"""Sets C{early_release} flag on opcodes if available.
|
893 |
|
894 |
"""
|
895 |
try:
|
896 |
op.early_release = early_release |
897 |
except AttributeError: |
898 |
assert not isinstance(op, opcodes.OpInstanceReplaceDisks) |
899 |
|
900 |
return op
|
901 |
|
902 |
|
903 |
def MapInstanceDisksToNodes(instances): |
904 |
"""Creates a map from (node, volume) to instance name.
|
905 |
|
906 |
@type instances: list of L{objects.Instance}
|
907 |
@rtype: dict; tuple of (node uuid, volume name) as key, instance name as value
|
908 |
|
909 |
"""
|
910 |
return dict(((node_uuid, vol), inst.name) |
911 |
for inst in instances |
912 |
for (node_uuid, vols) in inst.MapLVsByNode().items() |
913 |
for vol in vols) |
914 |
|
915 |
|
916 |
def CheckParamsNotGlobal(params, glob_pars, kind, bad_levels, good_levels): |
917 |
"""Make sure that none of the given paramters is global.
|
918 |
|
919 |
If a global parameter is found, an L{errors.OpPrereqError} exception is
|
920 |
raised. This is used to avoid setting global parameters for individual nodes.
|
921 |
|
922 |
@type params: dictionary
|
923 |
@param params: Parameters to check
|
924 |
@type glob_pars: dictionary
|
925 |
@param glob_pars: Forbidden parameters
|
926 |
@type kind: string
|
927 |
@param kind: Kind of parameters (e.g. "node")
|
928 |
@type bad_levels: string
|
929 |
@param bad_levels: Level(s) at which the parameters are forbidden (e.g.
|
930 |
"instance")
|
931 |
@type good_levels: strings
|
932 |
@param good_levels: Level(s) at which the parameters are allowed (e.g.
|
933 |
"cluster or group")
|
934 |
|
935 |
"""
|
936 |
used_globals = glob_pars.intersection(params) |
937 |
if used_globals:
|
938 |
msg = ("The following %s parameters are global and cannot"
|
939 |
" be customized at %s level, please modify them at"
|
940 |
" %s level: %s" %
|
941 |
(kind, bad_levels, good_levels, utils.CommaJoin(used_globals))) |
942 |
raise errors.OpPrereqError(msg, errors.ECODE_INVAL)
|
943 |
|
944 |
|
945 |
def IsExclusiveStorageEnabledNode(cfg, node): |
946 |
"""Whether exclusive_storage is in effect for the given node.
|
947 |
|
948 |
@type cfg: L{config.ConfigWriter}
|
949 |
@param cfg: The cluster configuration
|
950 |
@type node: L{objects.Node}
|
951 |
@param node: The node
|
952 |
@rtype: bool
|
953 |
@return: The effective value of exclusive_storage
|
954 |
|
955 |
"""
|
956 |
return cfg.GetNdParams(node)[constants.ND_EXCLUSIVE_STORAGE]
|
957 |
|
958 |
|
959 |
def CheckInstanceState(lu, instance, req_states, msg=None): |
960 |
"""Ensure that an instance is in one of the required states.
|
961 |
|
962 |
@param lu: the LU on behalf of which we make the check
|
963 |
@param instance: the instance to check
|
964 |
@param msg: if passed, should be a message to replace the default one
|
965 |
@raise errors.OpPrereqError: if the instance is not in the required state
|
966 |
|
967 |
"""
|
968 |
if msg is None: |
969 |
msg = ("can't use instance from outside %s states" %
|
970 |
utils.CommaJoin(req_states)) |
971 |
if instance.admin_state not in req_states: |
972 |
raise errors.OpPrereqError("Instance '%s' is marked to be %s, %s" % |
973 |
(instance.name, instance.admin_state, msg), |
974 |
errors.ECODE_STATE) |
975 |
|
976 |
if constants.ADMINST_UP not in req_states: |
977 |
pnode_uuid = instance.primary_node |
978 |
if not lu.cfg.GetNodeInfo(pnode_uuid).offline: |
979 |
all_hvparams = lu.cfg.GetClusterInfo().hvparams |
980 |
ins_l = lu.rpc.call_instance_list( |
981 |
[pnode_uuid], [instance.hypervisor], all_hvparams)[pnode_uuid] |
982 |
ins_l.Raise("Can't contact node %s for instance information" %
|
983 |
lu.cfg.GetNodeName(pnode_uuid), |
984 |
prereq=True, ecode=errors.ECODE_ENVIRON)
|
985 |
if instance.name in ins_l.payload: |
986 |
raise errors.OpPrereqError("Instance %s is running, %s" % |
987 |
(instance.name, msg), errors.ECODE_STATE) |
988 |
else:
|
989 |
lu.LogWarning("Primary node offline, ignoring check that instance"
|
990 |
" is down")
|
991 |
|
992 |
|
993 |
def CheckIAllocatorOrNode(lu, iallocator_slot, node_slot): |
994 |
"""Check the sanity of iallocator and node arguments and use the
|
995 |
cluster-wide iallocator if appropriate.
|
996 |
|
997 |
Check that at most one of (iallocator, node) is specified. If none is
|
998 |
specified, or the iallocator is L{constants.DEFAULT_IALLOCATOR_SHORTCUT},
|
999 |
then the LU's opcode's iallocator slot is filled with the cluster-wide
|
1000 |
default iallocator.
|
1001 |
|
1002 |
@type iallocator_slot: string
|
1003 |
@param iallocator_slot: the name of the opcode iallocator slot
|
1004 |
@type node_slot: string
|
1005 |
@param node_slot: the name of the opcode target node slot
|
1006 |
|
1007 |
"""
|
1008 |
node = getattr(lu.op, node_slot, None) |
1009 |
ialloc = getattr(lu.op, iallocator_slot, None) |
1010 |
if node == []:
|
1011 |
node = None
|
1012 |
|
1013 |
if node is not None and ialloc is not None: |
1014 |
raise errors.OpPrereqError("Do not specify both, iallocator and node", |
1015 |
errors.ECODE_INVAL) |
1016 |
elif ((node is None and ialloc is None) or |
1017 |
ialloc == constants.DEFAULT_IALLOCATOR_SHORTCUT): |
1018 |
default_iallocator = lu.cfg.GetDefaultIAllocator() |
1019 |
if default_iallocator:
|
1020 |
setattr(lu.op, iallocator_slot, default_iallocator)
|
1021 |
else:
|
1022 |
raise errors.OpPrereqError("No iallocator or node given and no" |
1023 |
" cluster-wide default iallocator found;"
|
1024 |
" please specify either an iallocator or a"
|
1025 |
" node, or set a cluster-wide default"
|
1026 |
" iallocator", errors.ECODE_INVAL)
|
1027 |
|
1028 |
|
1029 |
def FindFaultyInstanceDisks(cfg, rpc_runner, instance, node_uuid, prereq): |
1030 |
faulty = [] |
1031 |
|
1032 |
for dev in instance.disks: |
1033 |
cfg.SetDiskID(dev, node_uuid) |
1034 |
|
1035 |
result = rpc_runner.call_blockdev_getmirrorstatus( |
1036 |
node_uuid, (instance.disks, instance)) |
1037 |
result.Raise("Failed to get disk status from node %s" %
|
1038 |
cfg.GetNodeName(node_uuid), |
1039 |
prereq=prereq, ecode=errors.ECODE_ENVIRON) |
1040 |
|
1041 |
for idx, bdev_status in enumerate(result.payload): |
1042 |
if bdev_status and bdev_status.ldisk_status == constants.LDS_FAULTY: |
1043 |
faulty.append(idx) |
1044 |
|
1045 |
return faulty
|
1046 |
|
1047 |
|
1048 |
def CheckNodeOnline(lu, node_uuid, msg=None): |
1049 |
"""Ensure that a given node is online.
|
1050 |
|
1051 |
@param lu: the LU on behalf of which we make the check
|
1052 |
@param node_uuid: the node to check
|
1053 |
@param msg: if passed, should be a message to replace the default one
|
1054 |
@raise errors.OpPrereqError: if the node is offline
|
1055 |
|
1056 |
"""
|
1057 |
if msg is None: |
1058 |
msg = "Can't use offline node"
|
1059 |
if lu.cfg.GetNodeInfo(node_uuid).offline:
|
1060 |
raise errors.OpPrereqError("%s: %s" % (msg, lu.cfg.GetNodeName(node_uuid)), |
1061 |
errors.ECODE_STATE) |