root / lib / config.py @ 2522b7c4
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#
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#
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# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 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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"""Configuration management for Ganeti
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This module provides the interface to the Ganeti cluster configuration.
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The configuration data is stored on every node but is updated on the master
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only. After each update, the master distributes the data to the other nodes.
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Currently, the data storage format is JSON. YAML was slow and consuming too
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much memory.
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"""
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# pylint: disable-msg=R0904
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# R0904: Too many public methods
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import os |
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import random |
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import logging |
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import time |
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import itertools |
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from ganeti import errors |
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from ganeti import locking |
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from ganeti import utils |
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from ganeti import constants |
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from ganeti import rpc |
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from ganeti import objects |
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from ganeti import serializer |
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from ganeti import uidpool |
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from ganeti import netutils |
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from ganeti import runtime |
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_config_lock = locking.SharedLock("ConfigWriter")
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# job id used for resource management at config upgrade time
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_UPGRADE_CONFIG_JID = "jid-cfg-upgrade"
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def _ValidateConfig(data): |
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"""Verifies that a configuration objects looks valid.
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This only verifies the version of the configuration.
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@raise errors.ConfigurationError: if the version differs from what
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we expect
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"""
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if data.version != constants.CONFIG_VERSION:
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raise errors.ConfigVersionMismatch(constants.CONFIG_VERSION, data.version)
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class TemporaryReservationManager: |
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"""A temporary resource reservation manager.
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This is used to reserve resources in a job, before using them, making sure
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other jobs cannot get them in the meantime.
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"""
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def __init__(self): |
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self._ec_reserved = {}
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def Reserved(self, resource): |
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for holder_reserved in self._ec_reserved.values(): |
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if resource in holder_reserved: |
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return True |
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return False |
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def Reserve(self, ec_id, resource): |
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if self.Reserved(resource): |
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raise errors.ReservationError("Duplicate reservation for resource '%s'" |
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% str(resource))
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if ec_id not in self._ec_reserved: |
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self._ec_reserved[ec_id] = set([resource]) |
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else:
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self._ec_reserved[ec_id].add(resource)
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def DropECReservations(self, ec_id): |
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if ec_id in self._ec_reserved: |
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del self._ec_reserved[ec_id] |
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def GetReserved(self): |
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all_reserved = set()
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for holder_reserved in self._ec_reserved.values(): |
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all_reserved.update(holder_reserved) |
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return all_reserved
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def Generate(self, existing, generate_one_fn, ec_id): |
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"""Generate a new resource of this type
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"""
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assert callable(generate_one_fn) |
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all_elems = self.GetReserved()
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all_elems.update(existing) |
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retries = 64
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while retries > 0: |
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new_resource = generate_one_fn() |
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if new_resource is not None and new_resource not in all_elems: |
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break
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else:
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raise errors.ConfigurationError("Not able generate new resource" |
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" (last tried: %s)" % new_resource)
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self.Reserve(ec_id, new_resource)
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return new_resource
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class ConfigWriter: |
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"""The interface to the cluster configuration.
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@ivar _temporary_lvs: reservation manager for temporary LVs
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@ivar _all_rms: a list of all temporary reservation managers
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"""
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def __init__(self, cfg_file=None, offline=False, _getents=runtime.GetEnts, |
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accept_foreign=False):
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self.write_count = 0 |
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self._lock = _config_lock
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self._config_data = None |
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self._offline = offline
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if cfg_file is None: |
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self._cfg_file = constants.CLUSTER_CONF_FILE
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else:
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self._cfg_file = cfg_file
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self._getents = _getents
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self._temporary_ids = TemporaryReservationManager()
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self._temporary_drbds = {}
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self._temporary_macs = TemporaryReservationManager()
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self._temporary_secrets = TemporaryReservationManager()
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self._temporary_lvs = TemporaryReservationManager()
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self._all_rms = [self._temporary_ids, self._temporary_macs, |
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self._temporary_secrets, self._temporary_lvs] |
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# Note: in order to prevent errors when resolving our name in
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# _DistributeConfig, we compute it here once and reuse it; it's
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# better to raise an error before starting to modify the config
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# file than after it was modified
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self._my_hostname = netutils.Hostname.GetSysName()
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self._last_cluster_serial = -1 |
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self._cfg_id = None |
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self._OpenConfig(accept_foreign)
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# this method needs to be static, so that we can call it on the class
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@staticmethod
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def IsCluster(): |
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"""Check if the cluster is configured.
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"""
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return os.path.exists(constants.CLUSTER_CONF_FILE)
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def _GenerateOneMAC(self): |
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"""Generate one mac address
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"""
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prefix = self._config_data.cluster.mac_prefix
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byte1 = random.randrange(0, 256) |
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byte2 = random.randrange(0, 256) |
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byte3 = random.randrange(0, 256) |
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mac = "%s:%02x:%02x:%02x" % (prefix, byte1, byte2, byte3)
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return mac
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@locking.ssynchronized(_config_lock, shared=1) |
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def GetNdParams(self, node): |
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"""Get the node params populated with cluster defaults.
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@type node: L{object.Node}
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@param node: The node we want to know the params for
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@return: A dict with the filled in node params
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"""
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nodegroup = self._UnlockedGetNodeGroup(node.group)
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return self._config_data.cluster.FillND(node, nodegroup) |
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@locking.ssynchronized(_config_lock, shared=1) |
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def GenerateMAC(self, ec_id): |
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"""Generate a MAC for an instance.
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This should check the current instances for duplicates.
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"""
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existing = self._AllMACs()
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return self._temporary_ids.Generate(existing, self._GenerateOneMAC, ec_id) |
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@locking.ssynchronized(_config_lock, shared=1) |
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def ReserveMAC(self, mac, ec_id): |
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"""Reserve a MAC for an instance.
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This only checks instances managed by this cluster, it does not
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check for potential collisions elsewhere.
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"""
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all_macs = self._AllMACs()
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if mac in all_macs: |
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raise errors.ReservationError("mac already in use") |
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else:
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self._temporary_macs.Reserve(ec_id, mac)
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@locking.ssynchronized(_config_lock, shared=1) |
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def ReserveLV(self, lv_name, ec_id): |
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"""Reserve an VG/LV pair for an instance.
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@type lv_name: string
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@param lv_name: the logical volume name to reserve
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"""
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all_lvs = self._AllLVs()
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if lv_name in all_lvs: |
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raise errors.ReservationError("LV already in use") |
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else:
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self._temporary_lvs.Reserve(ec_id, lv_name)
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@locking.ssynchronized(_config_lock, shared=1) |
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def GenerateDRBDSecret(self, ec_id): |
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"""Generate a DRBD secret.
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This checks the current disks for duplicates.
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"""
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return self._temporary_secrets.Generate(self._AllDRBDSecrets(), |
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utils.GenerateSecret, |
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ec_id) |
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def _AllLVs(self): |
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"""Compute the list of all LVs.
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"""
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lvnames = set()
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for instance in self._config_data.instances.values(): |
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node_data = instance.MapLVsByNode() |
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for lv_list in node_data.values(): |
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lvnames.update(lv_list) |
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return lvnames
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def _AllIDs(self, include_temporary): |
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"""Compute the list of all UUIDs and names we have.
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@type include_temporary: boolean
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@param include_temporary: whether to include the _temporary_ids set
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@rtype: set
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@return: a set of IDs
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"""
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existing = set()
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if include_temporary:
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existing.update(self._temporary_ids.GetReserved())
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existing.update(self._AllLVs())
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existing.update(self._config_data.instances.keys())
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existing.update(self._config_data.nodes.keys())
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existing.update([i.uuid for i in self._AllUUIDObjects() if i.uuid]) |
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return existing
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def _GenerateUniqueID(self, ec_id): |
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"""Generate an unique UUID.
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This checks the current node, instances and disk names for
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duplicates.
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@rtype: string
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@return: the unique id
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"""
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existing = self._AllIDs(include_temporary=False) |
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return self._temporary_ids.Generate(existing, utils.NewUUID, ec_id) |
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@locking.ssynchronized(_config_lock, shared=1) |
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def GenerateUniqueID(self, ec_id): |
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"""Generate an unique ID.
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This is just a wrapper over the unlocked version.
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@type ec_id: string
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@param ec_id: unique id for the job to reserve the id to
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"""
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return self._GenerateUniqueID(ec_id) |
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def _AllMACs(self): |
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"""Return all MACs present in the config.
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@rtype: list
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@return: the list of all MACs
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"""
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result = [] |
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for instance in self._config_data.instances.values(): |
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for nic in instance.nics: |
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result.append(nic.mac) |
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return result
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def _AllDRBDSecrets(self): |
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"""Return all DRBD secrets present in the config.
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@rtype: list
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@return: the list of all DRBD secrets
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"""
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def helper(disk, result): |
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"""Recursively gather secrets from this disk."""
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if disk.dev_type == constants.DT_DRBD8:
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result.append(disk.logical_id[5])
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if disk.children:
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for child in disk.children: |
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helper(child, result) |
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result = [] |
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for instance in self._config_data.instances.values(): |
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for disk in instance.disks: |
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helper(disk, result) |
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return result
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def _CheckDiskIDs(self, disk, l_ids, p_ids): |
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"""Compute duplicate disk IDs
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@type disk: L{objects.Disk}
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@param disk: the disk at which to start searching
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@type l_ids: list
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@param l_ids: list of current logical ids
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@type p_ids: list
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@param p_ids: list of current physical ids
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@rtype: list
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@return: a list of error messages
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"""
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result = [] |
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if disk.logical_id is not None: |
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if disk.logical_id in l_ids: |
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result.append("duplicate logical id %s" % str(disk.logical_id)) |
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else:
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l_ids.append(disk.logical_id) |
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if disk.physical_id is not None: |
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if disk.physical_id in p_ids: |
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result.append("duplicate physical id %s" % str(disk.physical_id)) |
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else:
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p_ids.append(disk.physical_id) |
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if disk.children:
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for child in disk.children: |
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result.extend(self._CheckDiskIDs(child, l_ids, p_ids))
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return result
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def _UnlockedVerifyConfig(self): |
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"""Verify function.
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@rtype: list
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@return: a list of error messages; a non-empty list signifies
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configuration errors
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"""
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# pylint: disable-msg=R0914
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result = [] |
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seen_macs = [] |
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ports = {}
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data = self._config_data
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cluster = data.cluster |
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seen_lids = [] |
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seen_pids = [] |
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# global cluster checks
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if not cluster.enabled_hypervisors: |
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result.append("enabled hypervisors list doesn't have any entries")
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invalid_hvs = set(cluster.enabled_hypervisors) - constants.HYPER_TYPES
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if invalid_hvs:
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result.append("enabled hypervisors contains invalid entries: %s" %
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invalid_hvs) |
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missing_hvp = (set(cluster.enabled_hypervisors) -
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set(cluster.hvparams.keys()))
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if missing_hvp:
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result.append("hypervisor parameters missing for the enabled"
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" hypervisor(s) %s" % utils.CommaJoin(missing_hvp))
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if cluster.master_node not in data.nodes: |
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result.append("cluster has invalid primary node '%s'" %
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cluster.master_node) |
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def _helper(owner, attr, value, template): |
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try:
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utils.ForceDictType(value, template) |
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except errors.GenericError, err:
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result.append("%s has invalid %s: %s" % (owner, attr, err))
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def _helper_nic(owner, params): |
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try:
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objects.NIC.CheckParameterSyntax(params) |
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except errors.ConfigurationError, err:
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result.append("%s has invalid nicparams: %s" % (owner, err))
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# check cluster parameters
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_helper("cluster", "beparams", cluster.SimpleFillBE({}), |
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constants.BES_PARAMETER_TYPES) |
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_helper("cluster", "nicparams", cluster.SimpleFillNIC({}), |
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constants.NICS_PARAMETER_TYPES) |
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_helper_nic("cluster", cluster.SimpleFillNIC({}))
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_helper("cluster", "ndparams", cluster.SimpleFillND({}), |
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constants.NDS_PARAMETER_TYPES) |
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# per-instance checks
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for instance_name in data.instances: |
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instance = data.instances[instance_name] |
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if instance.name != instance_name:
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result.append("instance '%s' is indexed by wrong name '%s'" %
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(instance.name, instance_name)) |
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if instance.primary_node not in data.nodes: |
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result.append("instance '%s' has invalid primary node '%s'" %
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(instance_name, instance.primary_node)) |
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for snode in instance.secondary_nodes: |
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if snode not in data.nodes: |
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result.append("instance '%s' has invalid secondary node '%s'" %
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(instance_name, snode)) |
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for idx, nic in enumerate(instance.nics): |
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if nic.mac in seen_macs: |
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result.append("instance '%s' has NIC %d mac %s duplicate" %
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(instance_name, idx, nic.mac)) |
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else:
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seen_macs.append(nic.mac) |
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if nic.nicparams:
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filled = cluster.SimpleFillNIC(nic.nicparams) |
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owner = "instance %s nic %d" % (instance.name, idx)
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_helper(owner, "nicparams",
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filled, constants.NICS_PARAMETER_TYPES) |
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_helper_nic(owner, filled) |
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# parameter checks
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if instance.beparams:
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_helper("instance %s" % instance.name, "beparams", |
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cluster.FillBE(instance), constants.BES_PARAMETER_TYPES) |
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# gather the drbd ports for duplicate checks
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for dsk in instance.disks: |
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if dsk.dev_type in constants.LDS_DRBD: |
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tcp_port = dsk.logical_id[2]
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if tcp_port not in ports: |
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ports[tcp_port] = [] |
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ports[tcp_port].append((instance.name, "drbd disk %s" % dsk.iv_name))
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# gather network port reservation
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net_port = getattr(instance, "network_port", None) |
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if net_port is not None: |
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if net_port not in ports: |
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ports[net_port] = [] |
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ports[net_port].append((instance.name, "network port"))
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# instance disk verify
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for idx, disk in enumerate(instance.disks): |
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result.extend(["instance '%s' disk %d error: %s" %
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(instance.name, idx, msg) for msg in disk.Verify()]) |
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result.extend(self._CheckDiskIDs(disk, seen_lids, seen_pids))
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# cluster-wide pool of free ports
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for free_port in cluster.tcpudp_port_pool: |
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if free_port not in ports: |
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ports[free_port] = [] |
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ports[free_port].append(("cluster", "port marked as free")) |
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# compute tcp/udp duplicate ports
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keys = ports.keys() |
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keys.sort() |
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for pnum in keys: |
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pdata = ports[pnum] |
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if len(pdata) > 1: |
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txt = utils.CommaJoin(["%s/%s" % val for val in pdata]) |
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result.append("tcp/udp port %s has duplicates: %s" % (pnum, txt))
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# highest used tcp port check
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if keys:
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| 486 |
if keys[-1] > cluster.highest_used_port: |
| 487 |
result.append("Highest used port mismatch, saved %s, computed %s" %
|
| 488 |
(cluster.highest_used_port, keys[-1]))
|
| 489 |
|
| 490 |
if not data.nodes[cluster.master_node].master_candidate: |
| 491 |
result.append("Master node is not a master candidate")
|
| 492 |
|
| 493 |
# master candidate checks
|
| 494 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats()
|
| 495 |
if mc_now < mc_max:
|
| 496 |
result.append("Not enough master candidates: actual %d, target %d" %
|
| 497 |
(mc_now, mc_max)) |
| 498 |
|
| 499 |
# node checks
|
| 500 |
for node_name, node in data.nodes.items(): |
| 501 |
if node.name != node_name:
|
| 502 |
result.append("Node '%s' is indexed by wrong name '%s'" %
|
| 503 |
(node.name, node_name)) |
| 504 |
if [node.master_candidate, node.drained, node.offline].count(True) > 1: |
| 505 |
result.append("Node %s state is invalid: master_candidate=%s,"
|
| 506 |
" drain=%s, offline=%s" %
|
| 507 |
(node.name, node.master_candidate, node.drained, |
| 508 |
node.offline)) |
| 509 |
if node.group not in data.nodegroups: |
| 510 |
result.append("Node '%s' has invalid group '%s'" %
|
| 511 |
(node.name, node.group)) |
| 512 |
else:
|
| 513 |
_helper("node %s" % node.name, "ndparams", |
| 514 |
cluster.FillND(node, data.nodegroups[node.group]), |
| 515 |
constants.NDS_PARAMETER_TYPES) |
| 516 |
|
| 517 |
# nodegroups checks
|
| 518 |
nodegroups_names = set()
|
| 519 |
for nodegroup_uuid in data.nodegroups: |
| 520 |
nodegroup = data.nodegroups[nodegroup_uuid] |
| 521 |
if nodegroup.uuid != nodegroup_uuid:
|
| 522 |
result.append("node group '%s' (uuid: '%s') indexed by wrong uuid '%s'"
|
| 523 |
% (nodegroup.name, nodegroup.uuid, nodegroup_uuid)) |
| 524 |
if utils.UUID_RE.match(nodegroup.name.lower()):
|
| 525 |
result.append("node group '%s' (uuid: '%s') has uuid-like name" %
|
| 526 |
(nodegroup.name, nodegroup.uuid)) |
| 527 |
if nodegroup.name in nodegroups_names: |
| 528 |
result.append("duplicate node group name '%s'" % nodegroup.name)
|
| 529 |
else:
|
| 530 |
nodegroups_names.add(nodegroup.name) |
| 531 |
if nodegroup.ndparams:
|
| 532 |
_helper("group %s" % nodegroup.name, "ndparams", |
| 533 |
cluster.SimpleFillND(nodegroup.ndparams), |
| 534 |
constants.NDS_PARAMETER_TYPES) |
| 535 |
|
| 536 |
|
| 537 |
# drbd minors check
|
| 538 |
_, duplicates = self._UnlockedComputeDRBDMap()
|
| 539 |
for node, minor, instance_a, instance_b in duplicates: |
| 540 |
result.append("DRBD minor %d on node %s is assigned twice to instances"
|
| 541 |
" %s and %s" % (minor, node, instance_a, instance_b))
|
| 542 |
|
| 543 |
# IP checks
|
| 544 |
default_nicparams = cluster.nicparams[constants.PP_DEFAULT] |
| 545 |
ips = {}
|
| 546 |
|
| 547 |
def _AddIpAddress(ip, name): |
| 548 |
ips.setdefault(ip, []).append(name) |
| 549 |
|
| 550 |
_AddIpAddress(cluster.master_ip, "cluster_ip")
|
| 551 |
|
| 552 |
for node in data.nodes.values(): |
| 553 |
_AddIpAddress(node.primary_ip, "node:%s/primary" % node.name)
|
| 554 |
if node.secondary_ip != node.primary_ip:
|
| 555 |
_AddIpAddress(node.secondary_ip, "node:%s/secondary" % node.name)
|
| 556 |
|
| 557 |
for instance in data.instances.values(): |
| 558 |
for idx, nic in enumerate(instance.nics): |
| 559 |
if nic.ip is None: |
| 560 |
continue
|
| 561 |
|
| 562 |
nicparams = objects.FillDict(default_nicparams, nic.nicparams) |
| 563 |
nic_mode = nicparams[constants.NIC_MODE] |
| 564 |
nic_link = nicparams[constants.NIC_LINK] |
| 565 |
|
| 566 |
if nic_mode == constants.NIC_MODE_BRIDGED:
|
| 567 |
link = "bridge:%s" % nic_link
|
| 568 |
elif nic_mode == constants.NIC_MODE_ROUTED:
|
| 569 |
link = "route:%s" % nic_link
|
| 570 |
else:
|
| 571 |
raise errors.ProgrammerError("NIC mode '%s' not handled" % nic_mode) |
| 572 |
|
| 573 |
_AddIpAddress("%s/%s" % (link, nic.ip),
|
| 574 |
"instance:%s/nic:%d" % (instance.name, idx))
|
| 575 |
|
| 576 |
for ip, owners in ips.items(): |
| 577 |
if len(owners) > 1: |
| 578 |
result.append("IP address %s is used by multiple owners: %s" %
|
| 579 |
(ip, utils.CommaJoin(owners))) |
| 580 |
|
| 581 |
return result
|
| 582 |
|
| 583 |
@locking.ssynchronized(_config_lock, shared=1) |
| 584 |
def VerifyConfig(self): |
| 585 |
"""Verify function.
|
| 586 |
|
| 587 |
This is just a wrapper over L{_UnlockedVerifyConfig}.
|
| 588 |
|
| 589 |
@rtype: list
|
| 590 |
@return: a list of error messages; a non-empty list signifies
|
| 591 |
configuration errors
|
| 592 |
|
| 593 |
"""
|
| 594 |
return self._UnlockedVerifyConfig() |
| 595 |
|
| 596 |
def _UnlockedSetDiskID(self, disk, node_name): |
| 597 |
"""Convert the unique ID to the ID needed on the target nodes.
|
| 598 |
|
| 599 |
This is used only for drbd, which needs ip/port configuration.
|
| 600 |
|
| 601 |
The routine descends down and updates its children also, because
|
| 602 |
this helps when the only the top device is passed to the remote
|
| 603 |
node.
|
| 604 |
|
| 605 |
This function is for internal use, when the config lock is already held.
|
| 606 |
|
| 607 |
"""
|
| 608 |
if disk.children:
|
| 609 |
for child in disk.children: |
| 610 |
self._UnlockedSetDiskID(child, node_name)
|
| 611 |
|
| 612 |
if disk.logical_id is None and disk.physical_id is not None: |
| 613 |
return
|
| 614 |
if disk.dev_type == constants.LD_DRBD8:
|
| 615 |
pnode, snode, port, pminor, sminor, secret = disk.logical_id |
| 616 |
if node_name not in (pnode, snode): |
| 617 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
| 618 |
node_name) |
| 619 |
pnode_info = self._UnlockedGetNodeInfo(pnode)
|
| 620 |
snode_info = self._UnlockedGetNodeInfo(snode)
|
| 621 |
if pnode_info is None or snode_info is None: |
| 622 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
| 623 |
" for %s" % str(disk)) |
| 624 |
p_data = (pnode_info.secondary_ip, port) |
| 625 |
s_data = (snode_info.secondary_ip, port) |
| 626 |
if pnode == node_name:
|
| 627 |
disk.physical_id = p_data + s_data + (pminor, secret) |
| 628 |
else: # it must be secondary, we tested above |
| 629 |
disk.physical_id = s_data + p_data + (sminor, secret) |
| 630 |
else:
|
| 631 |
disk.physical_id = disk.logical_id |
| 632 |
return
|
| 633 |
|
| 634 |
@locking.ssynchronized(_config_lock)
|
| 635 |
def SetDiskID(self, disk, node_name): |
| 636 |
"""Convert the unique ID to the ID needed on the target nodes.
|
| 637 |
|
| 638 |
This is used only for drbd, which needs ip/port configuration.
|
| 639 |
|
| 640 |
The routine descends down and updates its children also, because
|
| 641 |
this helps when the only the top device is passed to the remote
|
| 642 |
node.
|
| 643 |
|
| 644 |
"""
|
| 645 |
return self._UnlockedSetDiskID(disk, node_name) |
| 646 |
|
| 647 |
@locking.ssynchronized(_config_lock)
|
| 648 |
def AddTcpUdpPort(self, port): |
| 649 |
"""Adds a new port to the available port pool.
|
| 650 |
|
| 651 |
@warning: this method does not "flush" the configuration (via
|
| 652 |
L{_WriteConfig}); callers should do that themselves once the
|
| 653 |
configuration is stable
|
| 654 |
|
| 655 |
"""
|
| 656 |
if not isinstance(port, int): |
| 657 |
raise errors.ProgrammerError("Invalid type passed for port") |
| 658 |
|
| 659 |
self._config_data.cluster.tcpudp_port_pool.add(port)
|
| 660 |
|
| 661 |
@locking.ssynchronized(_config_lock, shared=1) |
| 662 |
def GetPortList(self): |
| 663 |
"""Returns a copy of the current port list.
|
| 664 |
|
| 665 |
"""
|
| 666 |
return self._config_data.cluster.tcpudp_port_pool.copy() |
| 667 |
|
| 668 |
@locking.ssynchronized(_config_lock)
|
| 669 |
def AllocatePort(self): |
| 670 |
"""Allocate a port.
|
| 671 |
|
| 672 |
The port will be taken from the available port pool or from the
|
| 673 |
default port range (and in this case we increase
|
| 674 |
highest_used_port).
|
| 675 |
|
| 676 |
"""
|
| 677 |
# If there are TCP/IP ports configured, we use them first.
|
| 678 |
if self._config_data.cluster.tcpudp_port_pool: |
| 679 |
port = self._config_data.cluster.tcpudp_port_pool.pop()
|
| 680 |
else:
|
| 681 |
port = self._config_data.cluster.highest_used_port + 1 |
| 682 |
if port >= constants.LAST_DRBD_PORT:
|
| 683 |
raise errors.ConfigurationError("The highest used port is greater" |
| 684 |
" than %s. Aborting." %
|
| 685 |
constants.LAST_DRBD_PORT) |
| 686 |
self._config_data.cluster.highest_used_port = port
|
| 687 |
|
| 688 |
self._WriteConfig()
|
| 689 |
return port
|
| 690 |
|
| 691 |
def _UnlockedComputeDRBDMap(self): |
| 692 |
"""Compute the used DRBD minor/nodes.
|
| 693 |
|
| 694 |
@rtype: (dict, list)
|
| 695 |
@return: dictionary of node_name: dict of minor: instance_name;
|
| 696 |
the returned dict will have all the nodes in it (even if with
|
| 697 |
an empty list), and a list of duplicates; if the duplicates
|
| 698 |
list is not empty, the configuration is corrupted and its caller
|
| 699 |
should raise an exception
|
| 700 |
|
| 701 |
"""
|
| 702 |
def _AppendUsedPorts(instance_name, disk, used): |
| 703 |
duplicates = [] |
| 704 |
if disk.dev_type == constants.LD_DRBD8 and len(disk.logical_id) >= 5: |
| 705 |
node_a, node_b, _, minor_a, minor_b = disk.logical_id[:5]
|
| 706 |
for node, port in ((node_a, minor_a), (node_b, minor_b)): |
| 707 |
assert node in used, ("Node '%s' of instance '%s' not found" |
| 708 |
" in node list" % (node, instance_name))
|
| 709 |
if port in used[node]: |
| 710 |
duplicates.append((node, port, instance_name, used[node][port])) |
| 711 |
else:
|
| 712 |
used[node][port] = instance_name |
| 713 |
if disk.children:
|
| 714 |
for child in disk.children: |
| 715 |
duplicates.extend(_AppendUsedPorts(instance_name, child, used)) |
| 716 |
return duplicates
|
| 717 |
|
| 718 |
duplicates = [] |
| 719 |
my_dict = dict((node, {}) for node in self._config_data.nodes) |
| 720 |
for instance in self._config_data.instances.itervalues(): |
| 721 |
for disk in instance.disks: |
| 722 |
duplicates.extend(_AppendUsedPorts(instance.name, disk, my_dict)) |
| 723 |
for (node, minor), instance in self._temporary_drbds.iteritems(): |
| 724 |
if minor in my_dict[node] and my_dict[node][minor] != instance: |
| 725 |
duplicates.append((node, minor, instance, my_dict[node][minor])) |
| 726 |
else:
|
| 727 |
my_dict[node][minor] = instance |
| 728 |
return my_dict, duplicates
|
| 729 |
|
| 730 |
@locking.ssynchronized(_config_lock)
|
| 731 |
def ComputeDRBDMap(self): |
| 732 |
"""Compute the used DRBD minor/nodes.
|
| 733 |
|
| 734 |
This is just a wrapper over L{_UnlockedComputeDRBDMap}.
|
| 735 |
|
| 736 |
@return: dictionary of node_name: dict of minor: instance_name;
|
| 737 |
the returned dict will have all the nodes in it (even if with
|
| 738 |
an empty list).
|
| 739 |
|
| 740 |
"""
|
| 741 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
| 742 |
if duplicates:
|
| 743 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
| 744 |
str(duplicates))
|
| 745 |
return d_map
|
| 746 |
|
| 747 |
@locking.ssynchronized(_config_lock)
|
| 748 |
def AllocateDRBDMinor(self, nodes, instance): |
| 749 |
"""Allocate a drbd minor.
|
| 750 |
|
| 751 |
The free minor will be automatically computed from the existing
|
| 752 |
devices. A node can be given multiple times in order to allocate
|
| 753 |
multiple minors. The result is the list of minors, in the same
|
| 754 |
order as the passed nodes.
|
| 755 |
|
| 756 |
@type instance: string
|
| 757 |
@param instance: the instance for which we allocate minors
|
| 758 |
|
| 759 |
"""
|
| 760 |
assert isinstance(instance, basestring), \ |
| 761 |
"Invalid argument '%s' passed to AllocateDRBDMinor" % instance
|
| 762 |
|
| 763 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
| 764 |
if duplicates:
|
| 765 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
| 766 |
str(duplicates))
|
| 767 |
result = [] |
| 768 |
for nname in nodes: |
| 769 |
ndata = d_map[nname] |
| 770 |
if not ndata: |
| 771 |
# no minors used, we can start at 0
|
| 772 |
result.append(0)
|
| 773 |
ndata[0] = instance
|
| 774 |
self._temporary_drbds[(nname, 0)] = instance |
| 775 |
continue
|
| 776 |
keys = ndata.keys() |
| 777 |
keys.sort() |
| 778 |
ffree = utils.FirstFree(keys) |
| 779 |
if ffree is None: |
| 780 |
# return the next minor
|
| 781 |
# TODO: implement high-limit check
|
| 782 |
minor = keys[-1] + 1 |
| 783 |
else:
|
| 784 |
minor = ffree |
| 785 |
# double-check minor against current instances
|
| 786 |
assert minor not in d_map[nname], \ |
| 787 |
("Attempt to reuse allocated DRBD minor %d on node %s,"
|
| 788 |
" already allocated to instance %s" %
|
| 789 |
(minor, nname, d_map[nname][minor])) |
| 790 |
ndata[minor] = instance |
| 791 |
# double-check minor against reservation
|
| 792 |
r_key = (nname, minor) |
| 793 |
assert r_key not in self._temporary_drbds, \ |
| 794 |
("Attempt to reuse reserved DRBD minor %d on node %s,"
|
| 795 |
" reserved for instance %s" %
|
| 796 |
(minor, nname, self._temporary_drbds[r_key]))
|
| 797 |
self._temporary_drbds[r_key] = instance
|
| 798 |
result.append(minor) |
| 799 |
logging.debug("Request to allocate drbd minors, input: %s, returning %s",
|
| 800 |
nodes, result) |
| 801 |
return result
|
| 802 |
|
| 803 |
def _UnlockedReleaseDRBDMinors(self, instance): |
| 804 |
"""Release temporary drbd minors allocated for a given instance.
|
| 805 |
|
| 806 |
@type instance: string
|
| 807 |
@param instance: the instance for which temporary minors should be
|
| 808 |
released
|
| 809 |
|
| 810 |
"""
|
| 811 |
assert isinstance(instance, basestring), \ |
| 812 |
"Invalid argument passed to ReleaseDRBDMinors"
|
| 813 |
for key, name in self._temporary_drbds.items(): |
| 814 |
if name == instance:
|
| 815 |
del self._temporary_drbds[key] |
| 816 |
|
| 817 |
@locking.ssynchronized(_config_lock)
|
| 818 |
def ReleaseDRBDMinors(self, instance): |
| 819 |
"""Release temporary drbd minors allocated for a given instance.
|
| 820 |
|
| 821 |
This should be called on the error paths, on the success paths
|
| 822 |
it's automatically called by the ConfigWriter add and update
|
| 823 |
functions.
|
| 824 |
|
| 825 |
This function is just a wrapper over L{_UnlockedReleaseDRBDMinors}.
|
| 826 |
|
| 827 |
@type instance: string
|
| 828 |
@param instance: the instance for which temporary minors should be
|
| 829 |
released
|
| 830 |
|
| 831 |
"""
|
| 832 |
self._UnlockedReleaseDRBDMinors(instance)
|
| 833 |
|
| 834 |
@locking.ssynchronized(_config_lock, shared=1) |
| 835 |
def GetConfigVersion(self): |
| 836 |
"""Get the configuration version.
|
| 837 |
|
| 838 |
@return: Config version
|
| 839 |
|
| 840 |
"""
|
| 841 |
return self._config_data.version |
| 842 |
|
| 843 |
@locking.ssynchronized(_config_lock, shared=1) |
| 844 |
def GetClusterName(self): |
| 845 |
"""Get cluster name.
|
| 846 |
|
| 847 |
@return: Cluster name
|
| 848 |
|
| 849 |
"""
|
| 850 |
return self._config_data.cluster.cluster_name |
| 851 |
|
| 852 |
@locking.ssynchronized(_config_lock, shared=1) |
| 853 |
def GetMasterNode(self): |
| 854 |
"""Get the hostname of the master node for this cluster.
|
| 855 |
|
| 856 |
@return: Master hostname
|
| 857 |
|
| 858 |
"""
|
| 859 |
return self._config_data.cluster.master_node |
| 860 |
|
| 861 |
@locking.ssynchronized(_config_lock, shared=1) |
| 862 |
def GetMasterIP(self): |
| 863 |
"""Get the IP of the master node for this cluster.
|
| 864 |
|
| 865 |
@return: Master IP
|
| 866 |
|
| 867 |
"""
|
| 868 |
return self._config_data.cluster.master_ip |
| 869 |
|
| 870 |
@locking.ssynchronized(_config_lock, shared=1) |
| 871 |
def GetMasterNetdev(self): |
| 872 |
"""Get the master network device for this cluster.
|
| 873 |
|
| 874 |
"""
|
| 875 |
return self._config_data.cluster.master_netdev |
| 876 |
|
| 877 |
@locking.ssynchronized(_config_lock, shared=1) |
| 878 |
def GetFileStorageDir(self): |
| 879 |
"""Get the file storage dir for this cluster.
|
| 880 |
|
| 881 |
"""
|
| 882 |
return self._config_data.cluster.file_storage_dir |
| 883 |
|
| 884 |
@locking.ssynchronized(_config_lock, shared=1) |
| 885 |
def GetHypervisorType(self): |
| 886 |
"""Get the hypervisor type for this cluster.
|
| 887 |
|
| 888 |
"""
|
| 889 |
return self._config_data.cluster.enabled_hypervisors[0] |
| 890 |
|
| 891 |
@locking.ssynchronized(_config_lock, shared=1) |
| 892 |
def GetHostKey(self): |
| 893 |
"""Return the rsa hostkey from the config.
|
| 894 |
|
| 895 |
@rtype: string
|
| 896 |
@return: the rsa hostkey
|
| 897 |
|
| 898 |
"""
|
| 899 |
return self._config_data.cluster.rsahostkeypub |
| 900 |
|
| 901 |
@locking.ssynchronized(_config_lock, shared=1) |
| 902 |
def GetDefaultIAllocator(self): |
| 903 |
"""Get the default instance allocator for this cluster.
|
| 904 |
|
| 905 |
"""
|
| 906 |
return self._config_data.cluster.default_iallocator |
| 907 |
|
| 908 |
@locking.ssynchronized(_config_lock, shared=1) |
| 909 |
def GetPrimaryIPFamily(self): |
| 910 |
"""Get cluster primary ip family.
|
| 911 |
|
| 912 |
@return: primary ip family
|
| 913 |
|
| 914 |
"""
|
| 915 |
return self._config_data.cluster.primary_ip_family |
| 916 |
|
| 917 |
@locking.ssynchronized(_config_lock)
|
| 918 |
def AddNodeGroup(self, group, ec_id, check_uuid=True): |
| 919 |
"""Add a node group to the configuration.
|
| 920 |
|
| 921 |
This method calls group.UpgradeConfig() to fill any missing attributes
|
| 922 |
according to their default values.
|
| 923 |
|
| 924 |
@type group: L{objects.NodeGroup}
|
| 925 |
@param group: the NodeGroup object to add
|
| 926 |
@type ec_id: string
|
| 927 |
@param ec_id: unique id for the job to use when creating a missing UUID
|
| 928 |
@type check_uuid: bool
|
| 929 |
@param check_uuid: add an UUID to the group if it doesn't have one or, if
|
| 930 |
it does, ensure that it does not exist in the
|
| 931 |
configuration already
|
| 932 |
|
| 933 |
"""
|
| 934 |
self._UnlockedAddNodeGroup(group, ec_id, check_uuid)
|
| 935 |
self._WriteConfig()
|
| 936 |
|
| 937 |
def _UnlockedAddNodeGroup(self, group, ec_id, check_uuid): |
| 938 |
"""Add a node group to the configuration.
|
| 939 |
|
| 940 |
"""
|
| 941 |
logging.info("Adding node group %s to configuration", group.name)
|
| 942 |
|
| 943 |
# Some code might need to add a node group with a pre-populated UUID
|
| 944 |
# generated with ConfigWriter.GenerateUniqueID(). We allow them to bypass
|
| 945 |
# the "does this UUID" exist already check.
|
| 946 |
if check_uuid:
|
| 947 |
self._EnsureUUID(group, ec_id)
|
| 948 |
|
| 949 |
try:
|
| 950 |
existing_uuid = self._UnlockedLookupNodeGroup(group.name)
|
| 951 |
except errors.OpPrereqError:
|
| 952 |
pass
|
| 953 |
else:
|
| 954 |
raise errors.OpPrereqError("Desired group name '%s' already exists as a" |
| 955 |
" node group (UUID: %s)" %
|
| 956 |
(group.name, existing_uuid), |
| 957 |
errors.ECODE_EXISTS) |
| 958 |
|
| 959 |
group.serial_no = 1
|
| 960 |
group.ctime = group.mtime = time.time() |
| 961 |
group.UpgradeConfig() |
| 962 |
|
| 963 |
self._config_data.nodegroups[group.uuid] = group
|
| 964 |
self._config_data.cluster.serial_no += 1 |
| 965 |
|
| 966 |
@locking.ssynchronized(_config_lock)
|
| 967 |
def RemoveNodeGroup(self, group_uuid): |
| 968 |
"""Remove a node group from the configuration.
|
| 969 |
|
| 970 |
@type group_uuid: string
|
| 971 |
@param group_uuid: the UUID of the node group to remove
|
| 972 |
|
| 973 |
"""
|
| 974 |
logging.info("Removing node group %s from configuration", group_uuid)
|
| 975 |
|
| 976 |
if group_uuid not in self._config_data.nodegroups: |
| 977 |
raise errors.ConfigurationError("Unknown node group '%s'" % group_uuid) |
| 978 |
|
| 979 |
assert len(self._config_data.nodegroups) != 1, \ |
| 980 |
"Group '%s' is the only group, cannot be removed" % group_uuid
|
| 981 |
|
| 982 |
del self._config_data.nodegroups[group_uuid] |
| 983 |
self._config_data.cluster.serial_no += 1 |
| 984 |
self._WriteConfig()
|
| 985 |
|
| 986 |
def _UnlockedLookupNodeGroup(self, target): |
| 987 |
"""Lookup a node group's UUID.
|
| 988 |
|
| 989 |
@type target: string or None
|
| 990 |
@param target: group name or UUID or None to look for the default
|
| 991 |
@rtype: string
|
| 992 |
@return: nodegroup UUID
|
| 993 |
@raises errors.OpPrereqError: when the target group cannot be found
|
| 994 |
|
| 995 |
"""
|
| 996 |
if target is None: |
| 997 |
if len(self._config_data.nodegroups) != 1: |
| 998 |
raise errors.OpPrereqError("More than one node group exists. Target" |
| 999 |
" group must be specified explicitely.")
|
| 1000 |
else:
|
| 1001 |
return self._config_data.nodegroups.keys()[0] |
| 1002 |
if target in self._config_data.nodegroups: |
| 1003 |
return target
|
| 1004 |
for nodegroup in self._config_data.nodegroups.values(): |
| 1005 |
if nodegroup.name == target:
|
| 1006 |
return nodegroup.uuid
|
| 1007 |
raise errors.OpPrereqError("Node group '%s' not found" % target, |
| 1008 |
errors.ECODE_NOENT) |
| 1009 |
|
| 1010 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1011 |
def LookupNodeGroup(self, target): |
| 1012 |
"""Lookup a node group's UUID.
|
| 1013 |
|
| 1014 |
This function is just a wrapper over L{_UnlockedLookupNodeGroup}.
|
| 1015 |
|
| 1016 |
@type target: string or None
|
| 1017 |
@param target: group name or UUID or None to look for the default
|
| 1018 |
@rtype: string
|
| 1019 |
@return: nodegroup UUID
|
| 1020 |
|
| 1021 |
"""
|
| 1022 |
return self._UnlockedLookupNodeGroup(target) |
| 1023 |
|
| 1024 |
def _UnlockedGetNodeGroup(self, uuid): |
| 1025 |
"""Lookup a node group.
|
| 1026 |
|
| 1027 |
@type uuid: string
|
| 1028 |
@param uuid: group UUID
|
| 1029 |
@rtype: L{objects.NodeGroup} or None
|
| 1030 |
@return: nodegroup object, or None if not found
|
| 1031 |
|
| 1032 |
"""
|
| 1033 |
if uuid not in self._config_data.nodegroups: |
| 1034 |
return None |
| 1035 |
|
| 1036 |
return self._config_data.nodegroups[uuid] |
| 1037 |
|
| 1038 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1039 |
def GetNodeGroup(self, uuid): |
| 1040 |
"""Lookup a node group.
|
| 1041 |
|
| 1042 |
@type uuid: string
|
| 1043 |
@param uuid: group UUID
|
| 1044 |
@rtype: L{objects.NodeGroup} or None
|
| 1045 |
@return: nodegroup object, or None if not found
|
| 1046 |
|
| 1047 |
"""
|
| 1048 |
return self._UnlockedGetNodeGroup(uuid) |
| 1049 |
|
| 1050 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1051 |
def GetAllNodeGroupsInfo(self): |
| 1052 |
"""Get the configuration of all node groups.
|
| 1053 |
|
| 1054 |
"""
|
| 1055 |
return dict(self._config_data.nodegroups) |
| 1056 |
|
| 1057 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1058 |
def GetNodeGroupList(self): |
| 1059 |
"""Get a list of node groups.
|
| 1060 |
|
| 1061 |
"""
|
| 1062 |
return self._config_data.nodegroups.keys() |
| 1063 |
|
| 1064 |
@locking.ssynchronized(_config_lock)
|
| 1065 |
def AddInstance(self, instance, ec_id): |
| 1066 |
"""Add an instance to the config.
|
| 1067 |
|
| 1068 |
This should be used after creating a new instance.
|
| 1069 |
|
| 1070 |
@type instance: L{objects.Instance}
|
| 1071 |
@param instance: the instance object
|
| 1072 |
|
| 1073 |
"""
|
| 1074 |
if not isinstance(instance, objects.Instance): |
| 1075 |
raise errors.ProgrammerError("Invalid type passed to AddInstance") |
| 1076 |
|
| 1077 |
if instance.disk_template != constants.DT_DISKLESS:
|
| 1078 |
all_lvs = instance.MapLVsByNode() |
| 1079 |
logging.info("Instance '%s' DISK_LAYOUT: %s", instance.name, all_lvs)
|
| 1080 |
|
| 1081 |
all_macs = self._AllMACs()
|
| 1082 |
for nic in instance.nics: |
| 1083 |
if nic.mac in all_macs: |
| 1084 |
raise errors.ConfigurationError("Cannot add instance %s:" |
| 1085 |
" MAC address '%s' already in use." %
|
| 1086 |
(instance.name, nic.mac)) |
| 1087 |
|
| 1088 |
self._EnsureUUID(instance, ec_id)
|
| 1089 |
|
| 1090 |
instance.serial_no = 1
|
| 1091 |
instance.ctime = instance.mtime = time.time() |
| 1092 |
self._config_data.instances[instance.name] = instance
|
| 1093 |
self._config_data.cluster.serial_no += 1 |
| 1094 |
self._UnlockedReleaseDRBDMinors(instance.name)
|
| 1095 |
self._WriteConfig()
|
| 1096 |
|
| 1097 |
def _EnsureUUID(self, item, ec_id): |
| 1098 |
"""Ensures a given object has a valid UUID.
|
| 1099 |
|
| 1100 |
@param item: the instance or node to be checked
|
| 1101 |
@param ec_id: the execution context id for the uuid reservation
|
| 1102 |
|
| 1103 |
"""
|
| 1104 |
if not item.uuid: |
| 1105 |
item.uuid = self._GenerateUniqueID(ec_id)
|
| 1106 |
elif item.uuid in self._AllIDs(include_temporary=True): |
| 1107 |
raise errors.ConfigurationError("Cannot add '%s': UUID %s already" |
| 1108 |
" in use" % (item.name, item.uuid))
|
| 1109 |
|
| 1110 |
def _SetInstanceStatus(self, instance_name, status): |
| 1111 |
"""Set the instance's status to a given value.
|
| 1112 |
|
| 1113 |
"""
|
| 1114 |
assert isinstance(status, bool), \ |
| 1115 |
"Invalid status '%s' passed to SetInstanceStatus" % (status,)
|
| 1116 |
|
| 1117 |
if instance_name not in self._config_data.instances: |
| 1118 |
raise errors.ConfigurationError("Unknown instance '%s'" % |
| 1119 |
instance_name) |
| 1120 |
instance = self._config_data.instances[instance_name]
|
| 1121 |
if instance.admin_up != status:
|
| 1122 |
instance.admin_up = status |
| 1123 |
instance.serial_no += 1
|
| 1124 |
instance.mtime = time.time() |
| 1125 |
self._WriteConfig()
|
| 1126 |
|
| 1127 |
@locking.ssynchronized(_config_lock)
|
| 1128 |
def MarkInstanceUp(self, instance_name): |
| 1129 |
"""Mark the instance status to up in the config.
|
| 1130 |
|
| 1131 |
"""
|
| 1132 |
self._SetInstanceStatus(instance_name, True) |
| 1133 |
|
| 1134 |
@locking.ssynchronized(_config_lock)
|
| 1135 |
def RemoveInstance(self, instance_name): |
| 1136 |
"""Remove the instance from the configuration.
|
| 1137 |
|
| 1138 |
"""
|
| 1139 |
if instance_name not in self._config_data.instances: |
| 1140 |
raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
| 1141 |
|
| 1142 |
# If a network port has been allocated to the instance,
|
| 1143 |
# return it to the pool of free ports.
|
| 1144 |
inst = self._config_data.instances[instance_name]
|
| 1145 |
network_port = getattr(inst, "network_port", None) |
| 1146 |
if network_port is not None: |
| 1147 |
self._config_data.cluster.tcpudp_port_pool.add(network_port)
|
| 1148 |
|
| 1149 |
del self._config_data.instances[instance_name] |
| 1150 |
self._config_data.cluster.serial_no += 1 |
| 1151 |
self._WriteConfig()
|
| 1152 |
|
| 1153 |
@locking.ssynchronized(_config_lock)
|
| 1154 |
def RenameInstance(self, old_name, new_name): |
| 1155 |
"""Rename an instance.
|
| 1156 |
|
| 1157 |
This needs to be done in ConfigWriter and not by RemoveInstance
|
| 1158 |
combined with AddInstance as only we can guarantee an atomic
|
| 1159 |
rename.
|
| 1160 |
|
| 1161 |
"""
|
| 1162 |
if old_name not in self._config_data.instances: |
| 1163 |
raise errors.ConfigurationError("Unknown instance '%s'" % old_name) |
| 1164 |
inst = self._config_data.instances[old_name]
|
| 1165 |
del self._config_data.instances[old_name] |
| 1166 |
inst.name = new_name |
| 1167 |
|
| 1168 |
for disk in inst.disks: |
| 1169 |
if disk.dev_type == constants.LD_FILE:
|
| 1170 |
# rename the file paths in logical and physical id
|
| 1171 |
file_storage_dir = os.path.dirname(os.path.dirname(disk.logical_id[1]))
|
| 1172 |
disk_fname = "disk%s" % disk.iv_name.split("/")[1] |
| 1173 |
disk.physical_id = disk.logical_id = (disk.logical_id[0],
|
| 1174 |
utils.PathJoin(file_storage_dir, |
| 1175 |
inst.name, |
| 1176 |
disk_fname)) |
| 1177 |
|
| 1178 |
# Force update of ssconf files
|
| 1179 |
self._config_data.cluster.serial_no += 1 |
| 1180 |
|
| 1181 |
self._config_data.instances[inst.name] = inst
|
| 1182 |
self._WriteConfig()
|
| 1183 |
|
| 1184 |
@locking.ssynchronized(_config_lock)
|
| 1185 |
def MarkInstanceDown(self, instance_name): |
| 1186 |
"""Mark the status of an instance to down in the configuration.
|
| 1187 |
|
| 1188 |
"""
|
| 1189 |
self._SetInstanceStatus(instance_name, False) |
| 1190 |
|
| 1191 |
def _UnlockedGetInstanceList(self): |
| 1192 |
"""Get the list of instances.
|
| 1193 |
|
| 1194 |
This function is for internal use, when the config lock is already held.
|
| 1195 |
|
| 1196 |
"""
|
| 1197 |
return self._config_data.instances.keys() |
| 1198 |
|
| 1199 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1200 |
def GetInstanceList(self): |
| 1201 |
"""Get the list of instances.
|
| 1202 |
|
| 1203 |
@return: array of instances, ex. ['instance2.example.com',
|
| 1204 |
'instance1.example.com']
|
| 1205 |
|
| 1206 |
"""
|
| 1207 |
return self._UnlockedGetInstanceList() |
| 1208 |
|
| 1209 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1210 |
def ExpandInstanceName(self, short_name): |
| 1211 |
"""Attempt to expand an incomplete instance name.
|
| 1212 |
|
| 1213 |
"""
|
| 1214 |
return utils.MatchNameComponent(short_name,
|
| 1215 |
self._config_data.instances.keys(),
|
| 1216 |
case_sensitive=False)
|
| 1217 |
|
| 1218 |
def _UnlockedGetInstanceInfo(self, instance_name): |
| 1219 |
"""Returns information about an instance.
|
| 1220 |
|
| 1221 |
This function is for internal use, when the config lock is already held.
|
| 1222 |
|
| 1223 |
"""
|
| 1224 |
if instance_name not in self._config_data.instances: |
| 1225 |
return None |
| 1226 |
|
| 1227 |
return self._config_data.instances[instance_name] |
| 1228 |
|
| 1229 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1230 |
def GetInstanceInfo(self, instance_name): |
| 1231 |
"""Returns information about an instance.
|
| 1232 |
|
| 1233 |
It takes the information from the configuration file. Other information of
|
| 1234 |
an instance are taken from the live systems.
|
| 1235 |
|
| 1236 |
@param instance_name: name of the instance, e.g.
|
| 1237 |
I{instance1.example.com}
|
| 1238 |
|
| 1239 |
@rtype: L{objects.Instance}
|
| 1240 |
@return: the instance object
|
| 1241 |
|
| 1242 |
"""
|
| 1243 |
return self._UnlockedGetInstanceInfo(instance_name) |
| 1244 |
|
| 1245 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1246 |
def GetAllInstancesInfo(self): |
| 1247 |
"""Get the configuration of all instances.
|
| 1248 |
|
| 1249 |
@rtype: dict
|
| 1250 |
@return: dict of (instance, instance_info), where instance_info is what
|
| 1251 |
would GetInstanceInfo return for the node
|
| 1252 |
|
| 1253 |
"""
|
| 1254 |
my_dict = dict([(instance, self._UnlockedGetInstanceInfo(instance)) |
| 1255 |
for instance in self._UnlockedGetInstanceList()]) |
| 1256 |
return my_dict
|
| 1257 |
|
| 1258 |
@locking.ssynchronized(_config_lock)
|
| 1259 |
def AddNode(self, node, ec_id): |
| 1260 |
"""Add a node to the configuration.
|
| 1261 |
|
| 1262 |
@type node: L{objects.Node}
|
| 1263 |
@param node: a Node instance
|
| 1264 |
|
| 1265 |
"""
|
| 1266 |
logging.info("Adding node %s to configuration", node.name)
|
| 1267 |
|
| 1268 |
self._EnsureUUID(node, ec_id)
|
| 1269 |
|
| 1270 |
node.serial_no = 1
|
| 1271 |
node.ctime = node.mtime = time.time() |
| 1272 |
self._UnlockedAddNodeToGroup(node.name, node.group)
|
| 1273 |
self._config_data.nodes[node.name] = node
|
| 1274 |
self._config_data.cluster.serial_no += 1 |
| 1275 |
self._WriteConfig()
|
| 1276 |
|
| 1277 |
@locking.ssynchronized(_config_lock)
|
| 1278 |
def RemoveNode(self, node_name): |
| 1279 |
"""Remove a node from the configuration.
|
| 1280 |
|
| 1281 |
"""
|
| 1282 |
logging.info("Removing node %s from configuration", node_name)
|
| 1283 |
|
| 1284 |
if node_name not in self._config_data.nodes: |
| 1285 |
raise errors.ConfigurationError("Unknown node '%s'" % node_name) |
| 1286 |
|
| 1287 |
self._UnlockedRemoveNodeFromGroup(self._config_data.nodes[node_name]) |
| 1288 |
del self._config_data.nodes[node_name] |
| 1289 |
self._config_data.cluster.serial_no += 1 |
| 1290 |
self._WriteConfig()
|
| 1291 |
|
| 1292 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1293 |
def ExpandNodeName(self, short_name): |
| 1294 |
"""Attempt to expand an incomplete instance name.
|
| 1295 |
|
| 1296 |
"""
|
| 1297 |
return utils.MatchNameComponent(short_name,
|
| 1298 |
self._config_data.nodes.keys(),
|
| 1299 |
case_sensitive=False)
|
| 1300 |
|
| 1301 |
def _UnlockedGetNodeInfo(self, node_name): |
| 1302 |
"""Get the configuration of a node, as stored in the config.
|
| 1303 |
|
| 1304 |
This function is for internal use, when the config lock is already
|
| 1305 |
held.
|
| 1306 |
|
| 1307 |
@param node_name: the node name, e.g. I{node1.example.com}
|
| 1308 |
|
| 1309 |
@rtype: L{objects.Node}
|
| 1310 |
@return: the node object
|
| 1311 |
|
| 1312 |
"""
|
| 1313 |
if node_name not in self._config_data.nodes: |
| 1314 |
return None |
| 1315 |
|
| 1316 |
return self._config_data.nodes[node_name] |
| 1317 |
|
| 1318 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1319 |
def GetNodeInfo(self, node_name): |
| 1320 |
"""Get the configuration of a node, as stored in the config.
|
| 1321 |
|
| 1322 |
This is just a locked wrapper over L{_UnlockedGetNodeInfo}.
|
| 1323 |
|
| 1324 |
@param node_name: the node name, e.g. I{node1.example.com}
|
| 1325 |
|
| 1326 |
@rtype: L{objects.Node}
|
| 1327 |
@return: the node object
|
| 1328 |
|
| 1329 |
"""
|
| 1330 |
return self._UnlockedGetNodeInfo(node_name) |
| 1331 |
|
| 1332 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1333 |
def GetNodeInstances(self, node_name): |
| 1334 |
"""Get the instances of a node, as stored in the config.
|
| 1335 |
|
| 1336 |
@param node_name: the node name, e.g. I{node1.example.com}
|
| 1337 |
|
| 1338 |
@rtype: (list, list)
|
| 1339 |
@return: a tuple with two lists: the primary and the secondary instances
|
| 1340 |
|
| 1341 |
"""
|
| 1342 |
pri = [] |
| 1343 |
sec = [] |
| 1344 |
for inst in self._config_data.instances.values(): |
| 1345 |
if inst.primary_node == node_name:
|
| 1346 |
pri.append(inst.name) |
| 1347 |
if node_name in inst.secondary_nodes: |
| 1348 |
sec.append(inst.name) |
| 1349 |
return (pri, sec)
|
| 1350 |
|
| 1351 |
def _UnlockedGetNodeList(self): |
| 1352 |
"""Return the list of nodes which are in the configuration.
|
| 1353 |
|
| 1354 |
This function is for internal use, when the config lock is already
|
| 1355 |
held.
|
| 1356 |
|
| 1357 |
@rtype: list
|
| 1358 |
|
| 1359 |
"""
|
| 1360 |
return self._config_data.nodes.keys() |
| 1361 |
|
| 1362 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1363 |
def GetNodeList(self): |
| 1364 |
"""Return the list of nodes which are in the configuration.
|
| 1365 |
|
| 1366 |
"""
|
| 1367 |
return self._UnlockedGetNodeList() |
| 1368 |
|
| 1369 |
def _UnlockedGetOnlineNodeList(self): |
| 1370 |
"""Return the list of nodes which are online.
|
| 1371 |
|
| 1372 |
"""
|
| 1373 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
| 1374 |
for node in self._UnlockedGetNodeList()] |
| 1375 |
return [node.name for node in all_nodes if not node.offline] |
| 1376 |
|
| 1377 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1378 |
def GetOnlineNodeList(self): |
| 1379 |
"""Return the list of nodes which are online.
|
| 1380 |
|
| 1381 |
"""
|
| 1382 |
return self._UnlockedGetOnlineNodeList() |
| 1383 |
|
| 1384 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1385 |
def GetVmCapableNodeList(self): |
| 1386 |
"""Return the list of nodes which are not vm capable.
|
| 1387 |
|
| 1388 |
"""
|
| 1389 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
| 1390 |
for node in self._UnlockedGetNodeList()] |
| 1391 |
return [node.name for node in all_nodes if node.vm_capable] |
| 1392 |
|
| 1393 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1394 |
def GetNonVmCapableNodeList(self): |
| 1395 |
"""Return the list of nodes which are not vm capable.
|
| 1396 |
|
| 1397 |
"""
|
| 1398 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
| 1399 |
for node in self._UnlockedGetNodeList()] |
| 1400 |
return [node.name for node in all_nodes if not node.vm_capable] |
| 1401 |
|
| 1402 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1403 |
def GetAllNodesInfo(self): |
| 1404 |
"""Get the configuration of all nodes.
|
| 1405 |
|
| 1406 |
@rtype: dict
|
| 1407 |
@return: dict of (node, node_info), where node_info is what
|
| 1408 |
would GetNodeInfo return for the node
|
| 1409 |
|
| 1410 |
"""
|
| 1411 |
my_dict = dict([(node, self._UnlockedGetNodeInfo(node)) |
| 1412 |
for node in self._UnlockedGetNodeList()]) |
| 1413 |
return my_dict
|
| 1414 |
|
| 1415 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1416 |
def GetNodeGroupsFromNodes(self, nodes): |
| 1417 |
"""Returns groups for a list of nodes.
|
| 1418 |
|
| 1419 |
@type nodes: list of string
|
| 1420 |
@param nodes: List of node names
|
| 1421 |
@rtype: frozenset
|
| 1422 |
|
| 1423 |
"""
|
| 1424 |
return frozenset(self._UnlockedGetNodeInfo(name).group for name in nodes) |
| 1425 |
|
| 1426 |
def _UnlockedGetMasterCandidateStats(self, exceptions=None): |
| 1427 |
"""Get the number of current and maximum desired and possible candidates.
|
| 1428 |
|
| 1429 |
@type exceptions: list
|
| 1430 |
@param exceptions: if passed, list of nodes that should be ignored
|
| 1431 |
@rtype: tuple
|
| 1432 |
@return: tuple of (current, desired and possible, possible)
|
| 1433 |
|
| 1434 |
"""
|
| 1435 |
mc_now = mc_should = mc_max = 0
|
| 1436 |
for node in self._config_data.nodes.values(): |
| 1437 |
if exceptions and node.name in exceptions: |
| 1438 |
continue
|
| 1439 |
if not (node.offline or node.drained) and node.master_capable: |
| 1440 |
mc_max += 1
|
| 1441 |
if node.master_candidate:
|
| 1442 |
mc_now += 1
|
| 1443 |
mc_should = min(mc_max, self._config_data.cluster.candidate_pool_size) |
| 1444 |
return (mc_now, mc_should, mc_max)
|
| 1445 |
|
| 1446 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1447 |
def GetMasterCandidateStats(self, exceptions=None): |
| 1448 |
"""Get the number of current and maximum possible candidates.
|
| 1449 |
|
| 1450 |
This is just a wrapper over L{_UnlockedGetMasterCandidateStats}.
|
| 1451 |
|
| 1452 |
@type exceptions: list
|
| 1453 |
@param exceptions: if passed, list of nodes that should be ignored
|
| 1454 |
@rtype: tuple
|
| 1455 |
@return: tuple of (current, max)
|
| 1456 |
|
| 1457 |
"""
|
| 1458 |
return self._UnlockedGetMasterCandidateStats(exceptions) |
| 1459 |
|
| 1460 |
@locking.ssynchronized(_config_lock)
|
| 1461 |
def MaintainCandidatePool(self, exceptions): |
| 1462 |
"""Try to grow the candidate pool to the desired size.
|
| 1463 |
|
| 1464 |
@type exceptions: list
|
| 1465 |
@param exceptions: if passed, list of nodes that should be ignored
|
| 1466 |
@rtype: list
|
| 1467 |
@return: list with the adjusted nodes (L{objects.Node} instances)
|
| 1468 |
|
| 1469 |
"""
|
| 1470 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats(exceptions)
|
| 1471 |
mod_list = [] |
| 1472 |
if mc_now < mc_max:
|
| 1473 |
node_list = self._config_data.nodes.keys()
|
| 1474 |
random.shuffle(node_list) |
| 1475 |
for name in node_list: |
| 1476 |
if mc_now >= mc_max:
|
| 1477 |
break
|
| 1478 |
node = self._config_data.nodes[name]
|
| 1479 |
if (node.master_candidate or node.offline or node.drained or |
| 1480 |
node.name in exceptions or not node.master_capable): |
| 1481 |
continue
|
| 1482 |
mod_list.append(node) |
| 1483 |
node.master_candidate = True
|
| 1484 |
node.serial_no += 1
|
| 1485 |
mc_now += 1
|
| 1486 |
if mc_now != mc_max:
|
| 1487 |
# this should not happen
|
| 1488 |
logging.warning("Warning: MaintainCandidatePool didn't manage to"
|
| 1489 |
" fill the candidate pool (%d/%d)", mc_now, mc_max)
|
| 1490 |
if mod_list:
|
| 1491 |
self._config_data.cluster.serial_no += 1 |
| 1492 |
self._WriteConfig()
|
| 1493 |
|
| 1494 |
return mod_list
|
| 1495 |
|
| 1496 |
def _UnlockedAddNodeToGroup(self, node_name, nodegroup_uuid): |
| 1497 |
"""Add a given node to the specified group.
|
| 1498 |
|
| 1499 |
"""
|
| 1500 |
if nodegroup_uuid not in self._config_data.nodegroups: |
| 1501 |
# This can happen if a node group gets deleted between its lookup and
|
| 1502 |
# when we're adding the first node to it, since we don't keep a lock in
|
| 1503 |
# the meantime. It's ok though, as we'll fail cleanly if the node group
|
| 1504 |
# is not found anymore.
|
| 1505 |
raise errors.OpExecError("Unknown node group: %s" % nodegroup_uuid) |
| 1506 |
if node_name not in self._config_data.nodegroups[nodegroup_uuid].members: |
| 1507 |
self._config_data.nodegroups[nodegroup_uuid].members.append(node_name)
|
| 1508 |
|
| 1509 |
def _UnlockedRemoveNodeFromGroup(self, node): |
| 1510 |
"""Remove a given node from its group.
|
| 1511 |
|
| 1512 |
"""
|
| 1513 |
nodegroup = node.group |
| 1514 |
if nodegroup not in self._config_data.nodegroups: |
| 1515 |
logging.warning("Warning: node '%s' has unknown node group '%s'"
|
| 1516 |
" (while being removed from it)", node.name, nodegroup)
|
| 1517 |
nodegroup_obj = self._config_data.nodegroups[nodegroup]
|
| 1518 |
if node.name not in nodegroup_obj.members: |
| 1519 |
logging.warning("Warning: node '%s' not a member of its node group '%s'"
|
| 1520 |
" (while being removed from it)", node.name, nodegroup)
|
| 1521 |
else:
|
| 1522 |
nodegroup_obj.members.remove(node.name) |
| 1523 |
|
| 1524 |
@locking.ssynchronized(_config_lock)
|
| 1525 |
def AssignGroupNodes(self, mods): |
| 1526 |
"""Changes the group of a number of nodes.
|
| 1527 |
|
| 1528 |
@type mods: list of tuples; (node name, new group UUID)
|
| 1529 |
@param mods: Node membership modifications
|
| 1530 |
|
| 1531 |
"""
|
| 1532 |
groups = self._config_data.nodegroups
|
| 1533 |
nodes = self._config_data.nodes
|
| 1534 |
|
| 1535 |
resmod = [] |
| 1536 |
|
| 1537 |
# Try to resolve names/UUIDs first
|
| 1538 |
for (node_name, new_group_uuid) in mods: |
| 1539 |
try:
|
| 1540 |
node = nodes[node_name] |
| 1541 |
except KeyError: |
| 1542 |
raise errors.ConfigurationError("Unable to find node '%s'" % node_name) |
| 1543 |
|
| 1544 |
if node.group == new_group_uuid:
|
| 1545 |
# Node is being assigned to its current group
|
| 1546 |
logging.debug("Node '%s' was assigned to its current group (%s)",
|
| 1547 |
node_name, node.group) |
| 1548 |
continue
|
| 1549 |
|
| 1550 |
# Try to find current group of node
|
| 1551 |
try:
|
| 1552 |
old_group = groups[node.group] |
| 1553 |
except KeyError: |
| 1554 |
raise errors.ConfigurationError("Unable to find old group '%s'" % |
| 1555 |
node.group) |
| 1556 |
|
| 1557 |
# Try to find new group for node
|
| 1558 |
try:
|
| 1559 |
new_group = groups[new_group_uuid] |
| 1560 |
except KeyError: |
| 1561 |
raise errors.ConfigurationError("Unable to find new group '%s'" % |
| 1562 |
new_group_uuid) |
| 1563 |
|
| 1564 |
assert node.name in old_group.members, \ |
| 1565 |
("Inconsistent configuration: node '%s' not listed in members for its"
|
| 1566 |
" old group '%s'" % (node.name, old_group.uuid))
|
| 1567 |
assert node.name not in new_group.members, \ |
| 1568 |
("Inconsistent configuration: node '%s' already listed in members for"
|
| 1569 |
" its new group '%s'" % (node.name, new_group.uuid))
|
| 1570 |
|
| 1571 |
resmod.append((node, old_group, new_group)) |
| 1572 |
|
| 1573 |
# Apply changes
|
| 1574 |
for (node, old_group, new_group) in resmod: |
| 1575 |
assert node.uuid != new_group.uuid and old_group.uuid != new_group.uuid, \ |
| 1576 |
"Assigning to current group is not possible"
|
| 1577 |
|
| 1578 |
node.group = new_group.uuid |
| 1579 |
|
| 1580 |
# Update members of involved groups
|
| 1581 |
if node.name in old_group.members: |
| 1582 |
old_group.members.remove(node.name) |
| 1583 |
if node.name not in new_group.members: |
| 1584 |
new_group.members.append(node.name) |
| 1585 |
|
| 1586 |
# Update timestamps and serials (only once per node/group object)
|
| 1587 |
now = time.time() |
| 1588 |
for obj in frozenset(itertools.chain(*resmod)): # pylint: disable-msg=W0142 |
| 1589 |
obj.serial_no += 1
|
| 1590 |
obj.mtime = now |
| 1591 |
|
| 1592 |
# Force ssconf update
|
| 1593 |
self._config_data.cluster.serial_no += 1 |
| 1594 |
|
| 1595 |
self._WriteConfig()
|
| 1596 |
|
| 1597 |
def _BumpSerialNo(self): |
| 1598 |
"""Bump up the serial number of the config.
|
| 1599 |
|
| 1600 |
"""
|
| 1601 |
self._config_data.serial_no += 1 |
| 1602 |
self._config_data.mtime = time.time()
|
| 1603 |
|
| 1604 |
def _AllUUIDObjects(self): |
| 1605 |
"""Returns all objects with uuid attributes.
|
| 1606 |
|
| 1607 |
"""
|
| 1608 |
return (self._config_data.instances.values() + |
| 1609 |
self._config_data.nodes.values() +
|
| 1610 |
self._config_data.nodegroups.values() +
|
| 1611 |
[self._config_data.cluster])
|
| 1612 |
|
| 1613 |
def _OpenConfig(self, accept_foreign): |
| 1614 |
"""Read the config data from disk.
|
| 1615 |
|
| 1616 |
"""
|
| 1617 |
raw_data = utils.ReadFile(self._cfg_file)
|
| 1618 |
|
| 1619 |
try:
|
| 1620 |
data = objects.ConfigData.FromDict(serializer.Load(raw_data)) |
| 1621 |
except Exception, err: |
| 1622 |
raise errors.ConfigurationError(err)
|
| 1623 |
|
| 1624 |
# Make sure the configuration has the right version
|
| 1625 |
_ValidateConfig(data) |
| 1626 |
|
| 1627 |
if (not hasattr(data, 'cluster') or |
| 1628 |
not hasattr(data.cluster, 'rsahostkeypub')): |
| 1629 |
raise errors.ConfigurationError("Incomplete configuration" |
| 1630 |
" (missing cluster.rsahostkeypub)")
|
| 1631 |
|
| 1632 |
if data.cluster.master_node != self._my_hostname and not accept_foreign: |
| 1633 |
msg = ("The configuration denotes node %s as master, while my"
|
| 1634 |
" hostname is %s; opening a foreign configuration is only"
|
| 1635 |
" possible in accept_foreign mode" %
|
| 1636 |
(data.cluster.master_node, self._my_hostname))
|
| 1637 |
raise errors.ConfigurationError(msg)
|
| 1638 |
|
| 1639 |
# Upgrade configuration if needed
|
| 1640 |
data.UpgradeConfig() |
| 1641 |
|
| 1642 |
self._config_data = data
|
| 1643 |
# reset the last serial as -1 so that the next write will cause
|
| 1644 |
# ssconf update
|
| 1645 |
self._last_cluster_serial = -1 |
| 1646 |
|
| 1647 |
# And finally run our (custom) config upgrade sequence
|
| 1648 |
self._UpgradeConfig()
|
| 1649 |
|
| 1650 |
self._cfg_id = utils.GetFileID(path=self._cfg_file) |
| 1651 |
|
| 1652 |
def _UpgradeConfig(self): |
| 1653 |
"""Run upgrade steps that cannot be done purely in the objects.
|
| 1654 |
|
| 1655 |
This is because some data elements need uniqueness across the
|
| 1656 |
whole configuration, etc.
|
| 1657 |
|
| 1658 |
@warning: this function will call L{_WriteConfig()}, but also
|
| 1659 |
L{DropECReservations} so it needs to be called only from a
|
| 1660 |
"safe" place (the constructor). If one wanted to call it with
|
| 1661 |
the lock held, a DropECReservationUnlocked would need to be
|
| 1662 |
created first, to avoid causing deadlock.
|
| 1663 |
|
| 1664 |
"""
|
| 1665 |
modified = False
|
| 1666 |
for item in self._AllUUIDObjects(): |
| 1667 |
if item.uuid is None: |
| 1668 |
item.uuid = self._GenerateUniqueID(_UPGRADE_CONFIG_JID)
|
| 1669 |
modified = True
|
| 1670 |
if not self._config_data.nodegroups: |
| 1671 |
default_nodegroup_name = constants.INITIAL_NODE_GROUP_NAME |
| 1672 |
default_nodegroup = objects.NodeGroup(name=default_nodegroup_name, |
| 1673 |
members=[]) |
| 1674 |
self._UnlockedAddNodeGroup(default_nodegroup, _UPGRADE_CONFIG_JID, True) |
| 1675 |
modified = True
|
| 1676 |
for node in self._config_data.nodes.values(): |
| 1677 |
if not node.group: |
| 1678 |
node.group = self.LookupNodeGroup(None) |
| 1679 |
modified = True
|
| 1680 |
# This is technically *not* an upgrade, but needs to be done both when
|
| 1681 |
# nodegroups are being added, and upon normally loading the config,
|
| 1682 |
# because the members list of a node group is discarded upon
|
| 1683 |
# serializing/deserializing the object.
|
| 1684 |
self._UnlockedAddNodeToGroup(node.name, node.group)
|
| 1685 |
if modified:
|
| 1686 |
self._WriteConfig()
|
| 1687 |
# This is ok even if it acquires the internal lock, as _UpgradeConfig is
|
| 1688 |
# only called at config init time, without the lock held
|
| 1689 |
self.DropECReservations(_UPGRADE_CONFIG_JID)
|
| 1690 |
|
| 1691 |
def _DistributeConfig(self, feedback_fn): |
| 1692 |
"""Distribute the configuration to the other nodes.
|
| 1693 |
|
| 1694 |
Currently, this only copies the configuration file. In the future,
|
| 1695 |
it could be used to encapsulate the 2/3-phase update mechanism.
|
| 1696 |
|
| 1697 |
"""
|
| 1698 |
if self._offline: |
| 1699 |
return True |
| 1700 |
|
| 1701 |
bad = False
|
| 1702 |
|
| 1703 |
node_list = [] |
| 1704 |
addr_list = [] |
| 1705 |
myhostname = self._my_hostname
|
| 1706 |
# we can skip checking whether _UnlockedGetNodeInfo returns None
|
| 1707 |
# since the node list comes from _UnlocketGetNodeList, and we are
|
| 1708 |
# called with the lock held, so no modifications should take place
|
| 1709 |
# in between
|
| 1710 |
for node_name in self._UnlockedGetNodeList(): |
| 1711 |
if node_name == myhostname:
|
| 1712 |
continue
|
| 1713 |
node_info = self._UnlockedGetNodeInfo(node_name)
|
| 1714 |
if not node_info.master_candidate: |
| 1715 |
continue
|
| 1716 |
node_list.append(node_info.name) |
| 1717 |
addr_list.append(node_info.primary_ip) |
| 1718 |
|
| 1719 |
result = rpc.RpcRunner.call_upload_file(node_list, self._cfg_file,
|
| 1720 |
address_list=addr_list) |
| 1721 |
for to_node, to_result in result.items(): |
| 1722 |
msg = to_result.fail_msg |
| 1723 |
if msg:
|
| 1724 |
msg = ("Copy of file %s to node %s failed: %s" %
|
| 1725 |
(self._cfg_file, to_node, msg))
|
| 1726 |
logging.error(msg) |
| 1727 |
|
| 1728 |
if feedback_fn:
|
| 1729 |
feedback_fn(msg) |
| 1730 |
|
| 1731 |
bad = True
|
| 1732 |
|
| 1733 |
return not bad |
| 1734 |
|
| 1735 |
def _WriteConfig(self, destination=None, feedback_fn=None): |
| 1736 |
"""Write the configuration data to persistent storage.
|
| 1737 |
|
| 1738 |
"""
|
| 1739 |
assert feedback_fn is None or callable(feedback_fn) |
| 1740 |
|
| 1741 |
# Warn on config errors, but don't abort the save - the
|
| 1742 |
# configuration has already been modified, and we can't revert;
|
| 1743 |
# the best we can do is to warn the user and save as is, leaving
|
| 1744 |
# recovery to the user
|
| 1745 |
config_errors = self._UnlockedVerifyConfig()
|
| 1746 |
if config_errors:
|
| 1747 |
errmsg = ("Configuration data is not consistent: %s" %
|
| 1748 |
(utils.CommaJoin(config_errors))) |
| 1749 |
logging.critical(errmsg) |
| 1750 |
if feedback_fn:
|
| 1751 |
feedback_fn(errmsg) |
| 1752 |
|
| 1753 |
if destination is None: |
| 1754 |
destination = self._cfg_file
|
| 1755 |
self._BumpSerialNo()
|
| 1756 |
txt = serializer.Dump(self._config_data.ToDict())
|
| 1757 |
|
| 1758 |
getents = self._getents()
|
| 1759 |
try:
|
| 1760 |
fd = utils.SafeWriteFile(destination, self._cfg_id, data=txt,
|
| 1761 |
close=False, gid=getents.confd_gid, mode=0640) |
| 1762 |
except errors.LockError:
|
| 1763 |
raise errors.ConfigurationError("The configuration file has been" |
| 1764 |
" modified since the last write, cannot"
|
| 1765 |
" update")
|
| 1766 |
try:
|
| 1767 |
self._cfg_id = utils.GetFileID(fd=fd)
|
| 1768 |
finally:
|
| 1769 |
os.close(fd) |
| 1770 |
|
| 1771 |
self.write_count += 1 |
| 1772 |
|
| 1773 |
# and redistribute the config file to master candidates
|
| 1774 |
self._DistributeConfig(feedback_fn)
|
| 1775 |
|
| 1776 |
# Write ssconf files on all nodes (including locally)
|
| 1777 |
if self._last_cluster_serial < self._config_data.cluster.serial_no: |
| 1778 |
if not self._offline: |
| 1779 |
result = rpc.RpcRunner.call_write_ssconf_files( |
| 1780 |
self._UnlockedGetOnlineNodeList(),
|
| 1781 |
self._UnlockedGetSsconfValues())
|
| 1782 |
|
| 1783 |
for nname, nresu in result.items(): |
| 1784 |
msg = nresu.fail_msg |
| 1785 |
if msg:
|
| 1786 |
errmsg = ("Error while uploading ssconf files to"
|
| 1787 |
" node %s: %s" % (nname, msg))
|
| 1788 |
logging.warning(errmsg) |
| 1789 |
|
| 1790 |
if feedback_fn:
|
| 1791 |
feedback_fn(errmsg) |
| 1792 |
|
| 1793 |
self._last_cluster_serial = self._config_data.cluster.serial_no |
| 1794 |
|
| 1795 |
def _UnlockedGetSsconfValues(self): |
| 1796 |
"""Return the values needed by ssconf.
|
| 1797 |
|
| 1798 |
@rtype: dict
|
| 1799 |
@return: a dictionary with keys the ssconf names and values their
|
| 1800 |
associated value
|
| 1801 |
|
| 1802 |
"""
|
| 1803 |
fn = "\n".join
|
| 1804 |
instance_names = utils.NiceSort(self._UnlockedGetInstanceList())
|
| 1805 |
node_names = utils.NiceSort(self._UnlockedGetNodeList())
|
| 1806 |
node_info = [self._UnlockedGetNodeInfo(name) for name in node_names] |
| 1807 |
node_pri_ips = ["%s %s" % (ninfo.name, ninfo.primary_ip)
|
| 1808 |
for ninfo in node_info] |
| 1809 |
node_snd_ips = ["%s %s" % (ninfo.name, ninfo.secondary_ip)
|
| 1810 |
for ninfo in node_info] |
| 1811 |
|
| 1812 |
instance_data = fn(instance_names) |
| 1813 |
off_data = fn(node.name for node in node_info if node.offline) |
| 1814 |
on_data = fn(node.name for node in node_info if not node.offline) |
| 1815 |
mc_data = fn(node.name for node in node_info if node.master_candidate) |
| 1816 |
mc_ips_data = fn(node.primary_ip for node in node_info |
| 1817 |
if node.master_candidate)
|
| 1818 |
node_data = fn(node_names) |
| 1819 |
node_pri_ips_data = fn(node_pri_ips) |
| 1820 |
node_snd_ips_data = fn(node_snd_ips) |
| 1821 |
|
| 1822 |
cluster = self._config_data.cluster
|
| 1823 |
cluster_tags = fn(cluster.GetTags()) |
| 1824 |
|
| 1825 |
hypervisor_list = fn(cluster.enabled_hypervisors) |
| 1826 |
|
| 1827 |
uid_pool = uidpool.FormatUidPool(cluster.uid_pool, separator="\n")
|
| 1828 |
|
| 1829 |
nodegroups = ["%s %s" % (nodegroup.uuid, nodegroup.name) for nodegroup in |
| 1830 |
self._config_data.nodegroups.values()]
|
| 1831 |
nodegroups_data = fn(utils.NiceSort(nodegroups)) |
| 1832 |
|
| 1833 |
return {
|
| 1834 |
constants.SS_CLUSTER_NAME: cluster.cluster_name, |
| 1835 |
constants.SS_CLUSTER_TAGS: cluster_tags, |
| 1836 |
constants.SS_FILE_STORAGE_DIR: cluster.file_storage_dir, |
| 1837 |
constants.SS_MASTER_CANDIDATES: mc_data, |
| 1838 |
constants.SS_MASTER_CANDIDATES_IPS: mc_ips_data, |
| 1839 |
constants.SS_MASTER_IP: cluster.master_ip, |
| 1840 |
constants.SS_MASTER_NETDEV: cluster.master_netdev, |
| 1841 |
constants.SS_MASTER_NODE: cluster.master_node, |
| 1842 |
constants.SS_NODE_LIST: node_data, |
| 1843 |
constants.SS_NODE_PRIMARY_IPS: node_pri_ips_data, |
| 1844 |
constants.SS_NODE_SECONDARY_IPS: node_snd_ips_data, |
| 1845 |
constants.SS_OFFLINE_NODES: off_data, |
| 1846 |
constants.SS_ONLINE_NODES: on_data, |
| 1847 |
constants.SS_PRIMARY_IP_FAMILY: str(cluster.primary_ip_family),
|
| 1848 |
constants.SS_INSTANCE_LIST: instance_data, |
| 1849 |
constants.SS_RELEASE_VERSION: constants.RELEASE_VERSION, |
| 1850 |
constants.SS_HYPERVISOR_LIST: hypervisor_list, |
| 1851 |
constants.SS_MAINTAIN_NODE_HEALTH: str(cluster.maintain_node_health),
|
| 1852 |
constants.SS_UID_POOL: uid_pool, |
| 1853 |
constants.SS_NODEGROUPS: nodegroups_data, |
| 1854 |
} |
| 1855 |
|
| 1856 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1857 |
def GetSsconfValues(self): |
| 1858 |
"""Wrapper using lock around _UnlockedGetSsconf().
|
| 1859 |
|
| 1860 |
"""
|
| 1861 |
return self._UnlockedGetSsconfValues() |
| 1862 |
|
| 1863 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1864 |
def GetVGName(self): |
| 1865 |
"""Return the volume group name.
|
| 1866 |
|
| 1867 |
"""
|
| 1868 |
return self._config_data.cluster.volume_group_name |
| 1869 |
|
| 1870 |
@locking.ssynchronized(_config_lock)
|
| 1871 |
def SetVGName(self, vg_name): |
| 1872 |
"""Set the volume group name.
|
| 1873 |
|
| 1874 |
"""
|
| 1875 |
self._config_data.cluster.volume_group_name = vg_name
|
| 1876 |
self._config_data.cluster.serial_no += 1 |
| 1877 |
self._WriteConfig()
|
| 1878 |
|
| 1879 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1880 |
def GetDRBDHelper(self): |
| 1881 |
"""Return DRBD usermode helper.
|
| 1882 |
|
| 1883 |
"""
|
| 1884 |
return self._config_data.cluster.drbd_usermode_helper |
| 1885 |
|
| 1886 |
@locking.ssynchronized(_config_lock)
|
| 1887 |
def SetDRBDHelper(self, drbd_helper): |
| 1888 |
"""Set DRBD usermode helper.
|
| 1889 |
|
| 1890 |
"""
|
| 1891 |
self._config_data.cluster.drbd_usermode_helper = drbd_helper
|
| 1892 |
self._config_data.cluster.serial_no += 1 |
| 1893 |
self._WriteConfig()
|
| 1894 |
|
| 1895 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1896 |
def GetMACPrefix(self): |
| 1897 |
"""Return the mac prefix.
|
| 1898 |
|
| 1899 |
"""
|
| 1900 |
return self._config_data.cluster.mac_prefix |
| 1901 |
|
| 1902 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1903 |
def GetClusterInfo(self): |
| 1904 |
"""Returns information about the cluster
|
| 1905 |
|
| 1906 |
@rtype: L{objects.Cluster}
|
| 1907 |
@return: the cluster object
|
| 1908 |
|
| 1909 |
"""
|
| 1910 |
return self._config_data.cluster |
| 1911 |
|
| 1912 |
@locking.ssynchronized(_config_lock, shared=1) |
| 1913 |
def HasAnyDiskOfType(self, dev_type): |
| 1914 |
"""Check if in there is at disk of the given type in the configuration.
|
| 1915 |
|
| 1916 |
"""
|
| 1917 |
return self._config_data.HasAnyDiskOfType(dev_type) |
| 1918 |
|
| 1919 |
@locking.ssynchronized(_config_lock)
|
| 1920 |
def Update(self, target, feedback_fn): |
| 1921 |
"""Notify function to be called after updates.
|
| 1922 |
|
| 1923 |
This function must be called when an object (as returned by
|
| 1924 |
GetInstanceInfo, GetNodeInfo, GetCluster) has been updated and the
|
| 1925 |
caller wants the modifications saved to the backing store. Note
|
| 1926 |
that all modified objects will be saved, but the target argument
|
| 1927 |
is the one the caller wants to ensure that it's saved.
|
| 1928 |
|
| 1929 |
@param target: an instance of either L{objects.Cluster},
|
| 1930 |
L{objects.Node} or L{objects.Instance} which is existing in
|
| 1931 |
the cluster
|
| 1932 |
@param feedback_fn: Callable feedback function
|
| 1933 |
|
| 1934 |
"""
|
| 1935 |
if self._config_data is None: |
| 1936 |
raise errors.ProgrammerError("Configuration file not read," |
| 1937 |
" cannot save.")
|
| 1938 |
update_serial = False
|
| 1939 |
if isinstance(target, objects.Cluster): |
| 1940 |
test = target == self._config_data.cluster
|
| 1941 |
elif isinstance(target, objects.Node): |
| 1942 |
test = target in self._config_data.nodes.values() |
| 1943 |
update_serial = True
|
| 1944 |
elif isinstance(target, objects.Instance): |
| 1945 |
test = target in self._config_data.instances.values() |
| 1946 |
elif isinstance(target, objects.NodeGroup): |
| 1947 |
test = target in self._config_data.nodegroups.values() |
| 1948 |
else:
|
| 1949 |
raise errors.ProgrammerError("Invalid object type (%s) passed to" |
| 1950 |
" ConfigWriter.Update" % type(target)) |
| 1951 |
if not test: |
| 1952 |
raise errors.ConfigurationError("Configuration updated since object" |
| 1953 |
" has been read or unknown object")
|
| 1954 |
target.serial_no += 1
|
| 1955 |
target.mtime = now = time.time() |
| 1956 |
|
| 1957 |
if update_serial:
|
| 1958 |
# for node updates, we need to increase the cluster serial too
|
| 1959 |
self._config_data.cluster.serial_no += 1 |
| 1960 |
self._config_data.cluster.mtime = now
|
| 1961 |
|
| 1962 |
if isinstance(target, objects.Instance): |
| 1963 |
self._UnlockedReleaseDRBDMinors(target.name)
|
| 1964 |
|
| 1965 |
self._WriteConfig(feedback_fn=feedback_fn)
|
| 1966 |
|
| 1967 |
@locking.ssynchronized(_config_lock)
|
| 1968 |
def DropECReservations(self, ec_id): |
| 1969 |
"""Drop per-execution-context reservations
|
| 1970 |
|
| 1971 |
"""
|
| 1972 |
for rm in self._all_rms: |
| 1973 |
rm.DropECReservations(ec_id) |