root / lib / config.py @ 415feb2e
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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=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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def _MatchNameComponentIgnoreCase(short_name, names): |
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"""Wrapper around L{utils.text.MatchNameComponent}.
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"""
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return utils.MatchNameComponent(short_name, names, case_sensitive=False) |
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def _CheckInstanceDiskIvNames(disks): |
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"""Checks if instance's disks' C{iv_name} attributes are in order.
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@type disks: list of L{objects.Disk}
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@param disks: List of disks
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@rtype: list of tuples; (int, string, string)
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@return: List of wrongly named disks, each tuple contains disk index,
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expected and actual name
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"""
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result = [] |
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for (idx, disk) in enumerate(disks): |
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exp_iv_name = "disk/%s" % idx
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if disk.iv_name != exp_iv_name:
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result.append((idx, exp_iv_name, disk.iv_name)) |
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return result
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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._context = None |
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self._OpenConfig(accept_foreign)
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def _GetRpc(self, address_list): |
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"""Returns RPC runner for configuration.
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"""
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return rpc.ConfigRunner(self._context, address_list) |
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def SetContext(self, context): |
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"""Sets Ganeti context.
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"""
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self._context = context
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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{objects.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=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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def _helper_ipolicy(owner, params): |
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try:
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objects.InstancePolicy.CheckParameterSyntax(params) |
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except errors.ConfigurationError, err:
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result.append("%s has invalid instance policy: %s" % (owner, err))
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def _helper_ispecs(owner, params): |
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for key, value in params.items(): |
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if key in constants.IPOLICY_ISPECS: |
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fullkey = "ipolicy/" + key
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_helper(owner, fullkey, value, constants.ISPECS_PARAMETER_TYPES) |
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else:
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# FIXME: assuming list type
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if key in constants.IPOLICY_PARAMETERS: |
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exp_type = float
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else:
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exp_type = list
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if not isinstance(value, exp_type): |
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result.append("%s has invalid instance policy: for %s,"
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" expecting %s, got %s" %
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(owner, key, exp_type.__name__, type(value)))
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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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_helper_ipolicy("cluster", cluster.SimpleFillIPolicy({}))
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_helper_ispecs("cluster", cluster.SimpleFillIPolicy({}))
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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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|
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# gather the drbd ports for duplicate checks
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for (idx, dsk) in enumerate(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" % idx))
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# gather network port reservation
|
521 |
net_port = getattr(instance, "network_port", None) |
522 |
if net_port is not None: |
523 |
if net_port not in ports: |
524 |
ports[net_port] = [] |
525 |
ports[net_port].append((instance.name, "network port"))
|
526 |
|
527 |
# instance disk verify
|
528 |
for idx, disk in enumerate(instance.disks): |
529 |
result.extend(["instance '%s' disk %d error: %s" %
|
530 |
(instance.name, idx, msg) for msg in disk.Verify()]) |
531 |
result.extend(self._CheckDiskIDs(disk, seen_lids, seen_pids))
|
532 |
|
533 |
wrong_names = _CheckInstanceDiskIvNames(instance.disks) |
534 |
if wrong_names:
|
535 |
tmp = "; ".join(("name of disk %s should be '%s', but is '%s'" % |
536 |
(idx, exp_name, actual_name)) |
537 |
for (idx, exp_name, actual_name) in wrong_names) |
538 |
|
539 |
result.append("Instance '%s' has wrongly named disks: %s" %
|
540 |
(instance.name, tmp)) |
541 |
|
542 |
# cluster-wide pool of free ports
|
543 |
for free_port in cluster.tcpudp_port_pool: |
544 |
if free_port not in ports: |
545 |
ports[free_port] = [] |
546 |
ports[free_port].append(("cluster", "port marked as free")) |
547 |
|
548 |
# compute tcp/udp duplicate ports
|
549 |
keys = ports.keys() |
550 |
keys.sort() |
551 |
for pnum in keys: |
552 |
pdata = ports[pnum] |
553 |
if len(pdata) > 1: |
554 |
txt = utils.CommaJoin(["%s/%s" % val for val in pdata]) |
555 |
result.append("tcp/udp port %s has duplicates: %s" % (pnum, txt))
|
556 |
|
557 |
# highest used tcp port check
|
558 |
if keys:
|
559 |
if keys[-1] > cluster.highest_used_port: |
560 |
result.append("Highest used port mismatch, saved %s, computed %s" %
|
561 |
(cluster.highest_used_port, keys[-1]))
|
562 |
|
563 |
if not data.nodes[cluster.master_node].master_candidate: |
564 |
result.append("Master node is not a master candidate")
|
565 |
|
566 |
# master candidate checks
|
567 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats()
|
568 |
if mc_now < mc_max:
|
569 |
result.append("Not enough master candidates: actual %d, target %d" %
|
570 |
(mc_now, mc_max)) |
571 |
|
572 |
# node checks
|
573 |
for node_name, node in data.nodes.items(): |
574 |
if node.name != node_name:
|
575 |
result.append("Node '%s' is indexed by wrong name '%s'" %
|
576 |
(node.name, node_name)) |
577 |
if [node.master_candidate, node.drained, node.offline].count(True) > 1: |
578 |
result.append("Node %s state is invalid: master_candidate=%s,"
|
579 |
" drain=%s, offline=%s" %
|
580 |
(node.name, node.master_candidate, node.drained, |
581 |
node.offline)) |
582 |
if node.group not in data.nodegroups: |
583 |
result.append("Node '%s' has invalid group '%s'" %
|
584 |
(node.name, node.group)) |
585 |
else:
|
586 |
_helper("node %s" % node.name, "ndparams", |
587 |
cluster.FillND(node, data.nodegroups[node.group]), |
588 |
constants.NDS_PARAMETER_TYPES) |
589 |
|
590 |
# nodegroups checks
|
591 |
nodegroups_names = set()
|
592 |
for nodegroup_uuid in data.nodegroups: |
593 |
nodegroup = data.nodegroups[nodegroup_uuid] |
594 |
if nodegroup.uuid != nodegroup_uuid:
|
595 |
result.append("node group '%s' (uuid: '%s') indexed by wrong uuid '%s'"
|
596 |
% (nodegroup.name, nodegroup.uuid, nodegroup_uuid)) |
597 |
if utils.UUID_RE.match(nodegroup.name.lower()):
|
598 |
result.append("node group '%s' (uuid: '%s') has uuid-like name" %
|
599 |
(nodegroup.name, nodegroup.uuid)) |
600 |
if nodegroup.name in nodegroups_names: |
601 |
result.append("duplicate node group name '%s'" % nodegroup.name)
|
602 |
else:
|
603 |
nodegroups_names.add(nodegroup.name) |
604 |
group_name = "group %s" % nodegroup.name
|
605 |
_helper_ipolicy(group_name, cluster.SimpleFillIPolicy(nodegroup.ipolicy)) |
606 |
_helper_ispecs(group_name, cluster.SimpleFillIPolicy(nodegroup.ipolicy)) |
607 |
if nodegroup.ndparams:
|
608 |
_helper(group_name, "ndparams",
|
609 |
cluster.SimpleFillND(nodegroup.ndparams), |
610 |
constants.NDS_PARAMETER_TYPES) |
611 |
|
612 |
# drbd minors check
|
613 |
_, duplicates = self._UnlockedComputeDRBDMap()
|
614 |
for node, minor, instance_a, instance_b in duplicates: |
615 |
result.append("DRBD minor %d on node %s is assigned twice to instances"
|
616 |
" %s and %s" % (minor, node, instance_a, instance_b))
|
617 |
|
618 |
# IP checks
|
619 |
default_nicparams = cluster.nicparams[constants.PP_DEFAULT] |
620 |
ips = {} |
621 |
|
622 |
def _AddIpAddress(ip, name): |
623 |
ips.setdefault(ip, []).append(name) |
624 |
|
625 |
_AddIpAddress(cluster.master_ip, "cluster_ip")
|
626 |
|
627 |
for node in data.nodes.values(): |
628 |
_AddIpAddress(node.primary_ip, "node:%s/primary" % node.name)
|
629 |
if node.secondary_ip != node.primary_ip:
|
630 |
_AddIpAddress(node.secondary_ip, "node:%s/secondary" % node.name)
|
631 |
|
632 |
for instance in data.instances.values(): |
633 |
for idx, nic in enumerate(instance.nics): |
634 |
if nic.ip is None: |
635 |
continue
|
636 |
|
637 |
nicparams = objects.FillDict(default_nicparams, nic.nicparams) |
638 |
nic_mode = nicparams[constants.NIC_MODE] |
639 |
nic_link = nicparams[constants.NIC_LINK] |
640 |
|
641 |
if nic_mode == constants.NIC_MODE_BRIDGED:
|
642 |
link = "bridge:%s" % nic_link
|
643 |
elif nic_mode == constants.NIC_MODE_ROUTED:
|
644 |
link = "route:%s" % nic_link
|
645 |
else:
|
646 |
raise errors.ProgrammerError("NIC mode '%s' not handled" % nic_mode) |
647 |
|
648 |
_AddIpAddress("%s/%s" % (link, nic.ip),
|
649 |
"instance:%s/nic:%d" % (instance.name, idx))
|
650 |
|
651 |
for ip, owners in ips.items(): |
652 |
if len(owners) > 1: |
653 |
result.append("IP address %s is used by multiple owners: %s" %
|
654 |
(ip, utils.CommaJoin(owners))) |
655 |
|
656 |
return result
|
657 |
|
658 |
@locking.ssynchronized(_config_lock, shared=1) |
659 |
def VerifyConfig(self): |
660 |
"""Verify function.
|
661 |
|
662 |
This is just a wrapper over L{_UnlockedVerifyConfig}.
|
663 |
|
664 |
@rtype: list
|
665 |
@return: a list of error messages; a non-empty list signifies
|
666 |
configuration errors
|
667 |
|
668 |
"""
|
669 |
return self._UnlockedVerifyConfig() |
670 |
|
671 |
def _UnlockedSetDiskID(self, disk, node_name): |
672 |
"""Convert the unique ID to the ID needed on the target nodes.
|
673 |
|
674 |
This is used only for drbd, which needs ip/port configuration.
|
675 |
|
676 |
The routine descends down and updates its children also, because
|
677 |
this helps when the only the top device is passed to the remote
|
678 |
node.
|
679 |
|
680 |
This function is for internal use, when the config lock is already held.
|
681 |
|
682 |
"""
|
683 |
if disk.children:
|
684 |
for child in disk.children: |
685 |
self._UnlockedSetDiskID(child, node_name)
|
686 |
|
687 |
if disk.logical_id is None and disk.physical_id is not None: |
688 |
return
|
689 |
if disk.dev_type == constants.LD_DRBD8:
|
690 |
pnode, snode, port, pminor, sminor, secret = disk.logical_id |
691 |
if node_name not in (pnode, snode): |
692 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
693 |
node_name) |
694 |
pnode_info = self._UnlockedGetNodeInfo(pnode)
|
695 |
snode_info = self._UnlockedGetNodeInfo(snode)
|
696 |
if pnode_info is None or snode_info is None: |
697 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
698 |
" for %s" % str(disk)) |
699 |
p_data = (pnode_info.secondary_ip, port) |
700 |
s_data = (snode_info.secondary_ip, port) |
701 |
if pnode == node_name:
|
702 |
disk.physical_id = p_data + s_data + (pminor, secret) |
703 |
else: # it must be secondary, we tested above |
704 |
disk.physical_id = s_data + p_data + (sminor, secret) |
705 |
else:
|
706 |
disk.physical_id = disk.logical_id |
707 |
return
|
708 |
|
709 |
@locking.ssynchronized(_config_lock)
|
710 |
def SetDiskID(self, disk, node_name): |
711 |
"""Convert the unique ID to the ID needed on the target nodes.
|
712 |
|
713 |
This is used only for drbd, which needs ip/port configuration.
|
714 |
|
715 |
The routine descends down and updates its children also, because
|
716 |
this helps when the only the top device is passed to the remote
|
717 |
node.
|
718 |
|
719 |
"""
|
720 |
return self._UnlockedSetDiskID(disk, node_name) |
721 |
|
722 |
@locking.ssynchronized(_config_lock)
|
723 |
def AddTcpUdpPort(self, port): |
724 |
"""Adds a new port to the available port pool.
|
725 |
|
726 |
"""
|
727 |
if not isinstance(port, int): |
728 |
raise errors.ProgrammerError("Invalid type passed for port") |
729 |
|
730 |
self._config_data.cluster.tcpudp_port_pool.add(port)
|
731 |
self._WriteConfig()
|
732 |
|
733 |
@locking.ssynchronized(_config_lock, shared=1) |
734 |
def GetPortList(self): |
735 |
"""Returns a copy of the current port list.
|
736 |
|
737 |
"""
|
738 |
return self._config_data.cluster.tcpudp_port_pool.copy() |
739 |
|
740 |
@locking.ssynchronized(_config_lock)
|
741 |
def AllocatePort(self): |
742 |
"""Allocate a port.
|
743 |
|
744 |
The port will be taken from the available port pool or from the
|
745 |
default port range (and in this case we increase
|
746 |
highest_used_port).
|
747 |
|
748 |
"""
|
749 |
# If there are TCP/IP ports configured, we use them first.
|
750 |
if self._config_data.cluster.tcpudp_port_pool: |
751 |
port = self._config_data.cluster.tcpudp_port_pool.pop()
|
752 |
else:
|
753 |
port = self._config_data.cluster.highest_used_port + 1 |
754 |
if port >= constants.LAST_DRBD_PORT:
|
755 |
raise errors.ConfigurationError("The highest used port is greater" |
756 |
" than %s. Aborting." %
|
757 |
constants.LAST_DRBD_PORT) |
758 |
self._config_data.cluster.highest_used_port = port
|
759 |
|
760 |
self._WriteConfig()
|
761 |
return port
|
762 |
|
763 |
def _UnlockedComputeDRBDMap(self): |
764 |
"""Compute the used DRBD minor/nodes.
|
765 |
|
766 |
@rtype: (dict, list)
|
767 |
@return: dictionary of node_name: dict of minor: instance_name;
|
768 |
the returned dict will have all the nodes in it (even if with
|
769 |
an empty list), and a list of duplicates; if the duplicates
|
770 |
list is not empty, the configuration is corrupted and its caller
|
771 |
should raise an exception
|
772 |
|
773 |
"""
|
774 |
def _AppendUsedPorts(instance_name, disk, used): |
775 |
duplicates = [] |
776 |
if disk.dev_type == constants.LD_DRBD8 and len(disk.logical_id) >= 5: |
777 |
node_a, node_b, _, minor_a, minor_b = disk.logical_id[:5]
|
778 |
for node, port in ((node_a, minor_a), (node_b, minor_b)): |
779 |
assert node in used, ("Node '%s' of instance '%s' not found" |
780 |
" in node list" % (node, instance_name))
|
781 |
if port in used[node]: |
782 |
duplicates.append((node, port, instance_name, used[node][port])) |
783 |
else:
|
784 |
used[node][port] = instance_name |
785 |
if disk.children:
|
786 |
for child in disk.children: |
787 |
duplicates.extend(_AppendUsedPorts(instance_name, child, used)) |
788 |
return duplicates
|
789 |
|
790 |
duplicates = [] |
791 |
my_dict = dict((node, {}) for node in self._config_data.nodes) |
792 |
for instance in self._config_data.instances.itervalues(): |
793 |
for disk in instance.disks: |
794 |
duplicates.extend(_AppendUsedPorts(instance.name, disk, my_dict)) |
795 |
for (node, minor), instance in self._temporary_drbds.iteritems(): |
796 |
if minor in my_dict[node] and my_dict[node][minor] != instance: |
797 |
duplicates.append((node, minor, instance, my_dict[node][minor])) |
798 |
else:
|
799 |
my_dict[node][minor] = instance |
800 |
return my_dict, duplicates
|
801 |
|
802 |
@locking.ssynchronized(_config_lock)
|
803 |
def ComputeDRBDMap(self): |
804 |
"""Compute the used DRBD minor/nodes.
|
805 |
|
806 |
This is just a wrapper over L{_UnlockedComputeDRBDMap}.
|
807 |
|
808 |
@return: dictionary of node_name: dict of minor: instance_name;
|
809 |
the returned dict will have all the nodes in it (even if with
|
810 |
an empty list).
|
811 |
|
812 |
"""
|
813 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
814 |
if duplicates:
|
815 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
816 |
str(duplicates))
|
817 |
return d_map
|
818 |
|
819 |
@locking.ssynchronized(_config_lock)
|
820 |
def AllocateDRBDMinor(self, nodes, instance): |
821 |
"""Allocate a drbd minor.
|
822 |
|
823 |
The free minor will be automatically computed from the existing
|
824 |
devices. A node can be given multiple times in order to allocate
|
825 |
multiple minors. The result is the list of minors, in the same
|
826 |
order as the passed nodes.
|
827 |
|
828 |
@type instance: string
|
829 |
@param instance: the instance for which we allocate minors
|
830 |
|
831 |
"""
|
832 |
assert isinstance(instance, basestring), \ |
833 |
"Invalid argument '%s' passed to AllocateDRBDMinor" % instance
|
834 |
|
835 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
836 |
if duplicates:
|
837 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
838 |
str(duplicates))
|
839 |
result = [] |
840 |
for nname in nodes: |
841 |
ndata = d_map[nname] |
842 |
if not ndata: |
843 |
# no minors used, we can start at 0
|
844 |
result.append(0)
|
845 |
ndata[0] = instance
|
846 |
self._temporary_drbds[(nname, 0)] = instance |
847 |
continue
|
848 |
keys = ndata.keys() |
849 |
keys.sort() |
850 |
ffree = utils.FirstFree(keys) |
851 |
if ffree is None: |
852 |
# return the next minor
|
853 |
# TODO: implement high-limit check
|
854 |
minor = keys[-1] + 1 |
855 |
else:
|
856 |
minor = ffree |
857 |
# double-check minor against current instances
|
858 |
assert minor not in d_map[nname], \ |
859 |
("Attempt to reuse allocated DRBD minor %d on node %s,"
|
860 |
" already allocated to instance %s" %
|
861 |
(minor, nname, d_map[nname][minor])) |
862 |
ndata[minor] = instance |
863 |
# double-check minor against reservation
|
864 |
r_key = (nname, minor) |
865 |
assert r_key not in self._temporary_drbds, \ |
866 |
("Attempt to reuse reserved DRBD minor %d on node %s,"
|
867 |
" reserved for instance %s" %
|
868 |
(minor, nname, self._temporary_drbds[r_key]))
|
869 |
self._temporary_drbds[r_key] = instance
|
870 |
result.append(minor) |
871 |
logging.debug("Request to allocate drbd minors, input: %s, returning %s",
|
872 |
nodes, result) |
873 |
return result
|
874 |
|
875 |
def _UnlockedReleaseDRBDMinors(self, instance): |
876 |
"""Release temporary drbd minors allocated for a given instance.
|
877 |
|
878 |
@type instance: string
|
879 |
@param instance: the instance for which temporary minors should be
|
880 |
released
|
881 |
|
882 |
"""
|
883 |
assert isinstance(instance, basestring), \ |
884 |
"Invalid argument passed to ReleaseDRBDMinors"
|
885 |
for key, name in self._temporary_drbds.items(): |
886 |
if name == instance:
|
887 |
del self._temporary_drbds[key] |
888 |
|
889 |
@locking.ssynchronized(_config_lock)
|
890 |
def ReleaseDRBDMinors(self, instance): |
891 |
"""Release temporary drbd minors allocated for a given instance.
|
892 |
|
893 |
This should be called on the error paths, on the success paths
|
894 |
it's automatically called by the ConfigWriter add and update
|
895 |
functions.
|
896 |
|
897 |
This function is just a wrapper over L{_UnlockedReleaseDRBDMinors}.
|
898 |
|
899 |
@type instance: string
|
900 |
@param instance: the instance for which temporary minors should be
|
901 |
released
|
902 |
|
903 |
"""
|
904 |
self._UnlockedReleaseDRBDMinors(instance)
|
905 |
|
906 |
@locking.ssynchronized(_config_lock, shared=1) |
907 |
def GetConfigVersion(self): |
908 |
"""Get the configuration version.
|
909 |
|
910 |
@return: Config version
|
911 |
|
912 |
"""
|
913 |
return self._config_data.version |
914 |
|
915 |
@locking.ssynchronized(_config_lock, shared=1) |
916 |
def GetClusterName(self): |
917 |
"""Get cluster name.
|
918 |
|
919 |
@return: Cluster name
|
920 |
|
921 |
"""
|
922 |
return self._config_data.cluster.cluster_name |
923 |
|
924 |
@locking.ssynchronized(_config_lock, shared=1) |
925 |
def GetMasterNode(self): |
926 |
"""Get the hostname of the master node for this cluster.
|
927 |
|
928 |
@return: Master hostname
|
929 |
|
930 |
"""
|
931 |
return self._config_data.cluster.master_node |
932 |
|
933 |
@locking.ssynchronized(_config_lock, shared=1) |
934 |
def GetMasterIP(self): |
935 |
"""Get the IP of the master node for this cluster.
|
936 |
|
937 |
@return: Master IP
|
938 |
|
939 |
"""
|
940 |
return self._config_data.cluster.master_ip |
941 |
|
942 |
@locking.ssynchronized(_config_lock, shared=1) |
943 |
def GetMasterNetdev(self): |
944 |
"""Get the master network device for this cluster.
|
945 |
|
946 |
"""
|
947 |
return self._config_data.cluster.master_netdev |
948 |
|
949 |
@locking.ssynchronized(_config_lock, shared=1) |
950 |
def GetMasterNetmask(self): |
951 |
"""Get the netmask of the master node for this cluster.
|
952 |
|
953 |
"""
|
954 |
return self._config_data.cluster.master_netmask |
955 |
|
956 |
@locking.ssynchronized(_config_lock, shared=1) |
957 |
def GetUseExternalMipScript(self): |
958 |
"""Get flag representing whether to use the external master IP setup script.
|
959 |
|
960 |
"""
|
961 |
return self._config_data.cluster.use_external_mip_script |
962 |
|
963 |
@locking.ssynchronized(_config_lock, shared=1) |
964 |
def GetFileStorageDir(self): |
965 |
"""Get the file storage dir for this cluster.
|
966 |
|
967 |
"""
|
968 |
return self._config_data.cluster.file_storage_dir |
969 |
|
970 |
@locking.ssynchronized(_config_lock, shared=1) |
971 |
def GetSharedFileStorageDir(self): |
972 |
"""Get the shared file storage dir for this cluster.
|
973 |
|
974 |
"""
|
975 |
return self._config_data.cluster.shared_file_storage_dir |
976 |
|
977 |
@locking.ssynchronized(_config_lock, shared=1) |
978 |
def GetHypervisorType(self): |
979 |
"""Get the hypervisor type for this cluster.
|
980 |
|
981 |
"""
|
982 |
return self._config_data.cluster.enabled_hypervisors[0] |
983 |
|
984 |
@locking.ssynchronized(_config_lock, shared=1) |
985 |
def GetHostKey(self): |
986 |
"""Return the rsa hostkey from the config.
|
987 |
|
988 |
@rtype: string
|
989 |
@return: the rsa hostkey
|
990 |
|
991 |
"""
|
992 |
return self._config_data.cluster.rsahostkeypub |
993 |
|
994 |
@locking.ssynchronized(_config_lock, shared=1) |
995 |
def GetDefaultIAllocator(self): |
996 |
"""Get the default instance allocator for this cluster.
|
997 |
|
998 |
"""
|
999 |
return self._config_data.cluster.default_iallocator |
1000 |
|
1001 |
@locking.ssynchronized(_config_lock, shared=1) |
1002 |
def GetPrimaryIPFamily(self): |
1003 |
"""Get cluster primary ip family.
|
1004 |
|
1005 |
@return: primary ip family
|
1006 |
|
1007 |
"""
|
1008 |
return self._config_data.cluster.primary_ip_family |
1009 |
|
1010 |
@locking.ssynchronized(_config_lock, shared=1) |
1011 |
def GetMasterNetworkParameters(self): |
1012 |
"""Get network parameters of the master node.
|
1013 |
|
1014 |
@rtype: L{object.MasterNetworkParameters}
|
1015 |
@return: network parameters of the master node
|
1016 |
|
1017 |
"""
|
1018 |
cluster = self._config_data.cluster
|
1019 |
result = objects.MasterNetworkParameters(name=cluster.master_node, |
1020 |
ip=cluster.master_ip, |
1021 |
netmask=cluster.master_netmask, |
1022 |
netdev=cluster.master_netdev, |
1023 |
ip_family=cluster.primary_ip_family) |
1024 |
|
1025 |
return result
|
1026 |
|
1027 |
@locking.ssynchronized(_config_lock)
|
1028 |
def AddNodeGroup(self, group, ec_id, check_uuid=True): |
1029 |
"""Add a node group to the configuration.
|
1030 |
|
1031 |
This method calls group.UpgradeConfig() to fill any missing attributes
|
1032 |
according to their default values.
|
1033 |
|
1034 |
@type group: L{objects.NodeGroup}
|
1035 |
@param group: the NodeGroup object to add
|
1036 |
@type ec_id: string
|
1037 |
@param ec_id: unique id for the job to use when creating a missing UUID
|
1038 |
@type check_uuid: bool
|
1039 |
@param check_uuid: add an UUID to the group if it doesn't have one or, if
|
1040 |
it does, ensure that it does not exist in the
|
1041 |
configuration already
|
1042 |
|
1043 |
"""
|
1044 |
self._UnlockedAddNodeGroup(group, ec_id, check_uuid)
|
1045 |
self._WriteConfig()
|
1046 |
|
1047 |
def _UnlockedAddNodeGroup(self, group, ec_id, check_uuid): |
1048 |
"""Add a node group to the configuration.
|
1049 |
|
1050 |
"""
|
1051 |
logging.info("Adding node group %s to configuration", group.name)
|
1052 |
|
1053 |
# Some code might need to add a node group with a pre-populated UUID
|
1054 |
# generated with ConfigWriter.GenerateUniqueID(). We allow them to bypass
|
1055 |
# the "does this UUID" exist already check.
|
1056 |
if check_uuid:
|
1057 |
self._EnsureUUID(group, ec_id)
|
1058 |
|
1059 |
try:
|
1060 |
existing_uuid = self._UnlockedLookupNodeGroup(group.name)
|
1061 |
except errors.OpPrereqError:
|
1062 |
pass
|
1063 |
else:
|
1064 |
raise errors.OpPrereqError("Desired group name '%s' already exists as a" |
1065 |
" node group (UUID: %s)" %
|
1066 |
(group.name, existing_uuid), |
1067 |
errors.ECODE_EXISTS) |
1068 |
|
1069 |
group.serial_no = 1
|
1070 |
group.ctime = group.mtime = time.time() |
1071 |
group.UpgradeConfig() |
1072 |
|
1073 |
self._config_data.nodegroups[group.uuid] = group
|
1074 |
self._config_data.cluster.serial_no += 1 |
1075 |
|
1076 |
@locking.ssynchronized(_config_lock)
|
1077 |
def RemoveNodeGroup(self, group_uuid): |
1078 |
"""Remove a node group from the configuration.
|
1079 |
|
1080 |
@type group_uuid: string
|
1081 |
@param group_uuid: the UUID of the node group to remove
|
1082 |
|
1083 |
"""
|
1084 |
logging.info("Removing node group %s from configuration", group_uuid)
|
1085 |
|
1086 |
if group_uuid not in self._config_data.nodegroups: |
1087 |
raise errors.ConfigurationError("Unknown node group '%s'" % group_uuid) |
1088 |
|
1089 |
assert len(self._config_data.nodegroups) != 1, \ |
1090 |
"Group '%s' is the only group, cannot be removed" % group_uuid
|
1091 |
|
1092 |
del self._config_data.nodegroups[group_uuid] |
1093 |
self._config_data.cluster.serial_no += 1 |
1094 |
self._WriteConfig()
|
1095 |
|
1096 |
def _UnlockedLookupNodeGroup(self, target): |
1097 |
"""Lookup a node group's UUID.
|
1098 |
|
1099 |
@type target: string or None
|
1100 |
@param target: group name or UUID or None to look for the default
|
1101 |
@rtype: string
|
1102 |
@return: nodegroup UUID
|
1103 |
@raises errors.OpPrereqError: when the target group cannot be found
|
1104 |
|
1105 |
"""
|
1106 |
if target is None: |
1107 |
if len(self._config_data.nodegroups) != 1: |
1108 |
raise errors.OpPrereqError("More than one node group exists. Target" |
1109 |
" group must be specified explicitely.")
|
1110 |
else:
|
1111 |
return self._config_data.nodegroups.keys()[0] |
1112 |
if target in self._config_data.nodegroups: |
1113 |
return target
|
1114 |
for nodegroup in self._config_data.nodegroups.values(): |
1115 |
if nodegroup.name == target:
|
1116 |
return nodegroup.uuid
|
1117 |
raise errors.OpPrereqError("Node group '%s' not found" % target, |
1118 |
errors.ECODE_NOENT) |
1119 |
|
1120 |
@locking.ssynchronized(_config_lock, shared=1) |
1121 |
def LookupNodeGroup(self, target): |
1122 |
"""Lookup a node group's UUID.
|
1123 |
|
1124 |
This function is just a wrapper over L{_UnlockedLookupNodeGroup}.
|
1125 |
|
1126 |
@type target: string or None
|
1127 |
@param target: group name or UUID or None to look for the default
|
1128 |
@rtype: string
|
1129 |
@return: nodegroup UUID
|
1130 |
|
1131 |
"""
|
1132 |
return self._UnlockedLookupNodeGroup(target) |
1133 |
|
1134 |
def _UnlockedGetNodeGroup(self, uuid): |
1135 |
"""Lookup a node group.
|
1136 |
|
1137 |
@type uuid: string
|
1138 |
@param uuid: group UUID
|
1139 |
@rtype: L{objects.NodeGroup} or None
|
1140 |
@return: nodegroup object, or None if not found
|
1141 |
|
1142 |
"""
|
1143 |
if uuid not in self._config_data.nodegroups: |
1144 |
return None |
1145 |
|
1146 |
return self._config_data.nodegroups[uuid] |
1147 |
|
1148 |
@locking.ssynchronized(_config_lock, shared=1) |
1149 |
def GetNodeGroup(self, uuid): |
1150 |
"""Lookup a node group.
|
1151 |
|
1152 |
@type uuid: string
|
1153 |
@param uuid: group UUID
|
1154 |
@rtype: L{objects.NodeGroup} or None
|
1155 |
@return: nodegroup object, or None if not found
|
1156 |
|
1157 |
"""
|
1158 |
return self._UnlockedGetNodeGroup(uuid) |
1159 |
|
1160 |
@locking.ssynchronized(_config_lock, shared=1) |
1161 |
def GetAllNodeGroupsInfo(self): |
1162 |
"""Get the configuration of all node groups.
|
1163 |
|
1164 |
"""
|
1165 |
return dict(self._config_data.nodegroups) |
1166 |
|
1167 |
@locking.ssynchronized(_config_lock, shared=1) |
1168 |
def GetNodeGroupList(self): |
1169 |
"""Get a list of node groups.
|
1170 |
|
1171 |
"""
|
1172 |
return self._config_data.nodegroups.keys() |
1173 |
|
1174 |
@locking.ssynchronized(_config_lock, shared=1) |
1175 |
def GetNodeGroupMembersByNodes(self, nodes): |
1176 |
"""Get nodes which are member in the same nodegroups as the given nodes.
|
1177 |
|
1178 |
"""
|
1179 |
ngfn = lambda node_name: self._UnlockedGetNodeInfo(node_name).group |
1180 |
return frozenset(member_name |
1181 |
for node_name in nodes |
1182 |
for member_name in |
1183 |
self._UnlockedGetNodeGroup(ngfn(node_name)).members)
|
1184 |
|
1185 |
@locking.ssynchronized(_config_lock)
|
1186 |
def AddInstance(self, instance, ec_id): |
1187 |
"""Add an instance to the config.
|
1188 |
|
1189 |
This should be used after creating a new instance.
|
1190 |
|
1191 |
@type instance: L{objects.Instance}
|
1192 |
@param instance: the instance object
|
1193 |
|
1194 |
"""
|
1195 |
if not isinstance(instance, objects.Instance): |
1196 |
raise errors.ProgrammerError("Invalid type passed to AddInstance") |
1197 |
|
1198 |
if instance.disk_template != constants.DT_DISKLESS:
|
1199 |
all_lvs = instance.MapLVsByNode() |
1200 |
logging.info("Instance '%s' DISK_LAYOUT: %s", instance.name, all_lvs)
|
1201 |
|
1202 |
all_macs = self._AllMACs()
|
1203 |
for nic in instance.nics: |
1204 |
if nic.mac in all_macs: |
1205 |
raise errors.ConfigurationError("Cannot add instance %s:" |
1206 |
" MAC address '%s' already in use." %
|
1207 |
(instance.name, nic.mac)) |
1208 |
|
1209 |
self._EnsureUUID(instance, ec_id)
|
1210 |
|
1211 |
instance.serial_no = 1
|
1212 |
instance.ctime = instance.mtime = time.time() |
1213 |
self._config_data.instances[instance.name] = instance
|
1214 |
self._config_data.cluster.serial_no += 1 |
1215 |
self._UnlockedReleaseDRBDMinors(instance.name)
|
1216 |
self._WriteConfig()
|
1217 |
|
1218 |
def _EnsureUUID(self, item, ec_id): |
1219 |
"""Ensures a given object has a valid UUID.
|
1220 |
|
1221 |
@param item: the instance or node to be checked
|
1222 |
@param ec_id: the execution context id for the uuid reservation
|
1223 |
|
1224 |
"""
|
1225 |
if not item.uuid: |
1226 |
item.uuid = self._GenerateUniqueID(ec_id)
|
1227 |
elif item.uuid in self._AllIDs(include_temporary=True): |
1228 |
raise errors.ConfigurationError("Cannot add '%s': UUID %s already" |
1229 |
" in use" % (item.name, item.uuid))
|
1230 |
|
1231 |
def _SetInstanceStatus(self, instance_name, status): |
1232 |
"""Set the instance's status to a given value.
|
1233 |
|
1234 |
"""
|
1235 |
assert status in constants.ADMINST_ALL, \ |
1236 |
"Invalid status '%s' passed to SetInstanceStatus" % (status,)
|
1237 |
|
1238 |
if instance_name not in self._config_data.instances: |
1239 |
raise errors.ConfigurationError("Unknown instance '%s'" % |
1240 |
instance_name) |
1241 |
instance = self._config_data.instances[instance_name]
|
1242 |
if instance.admin_state != status:
|
1243 |
instance.admin_state = status |
1244 |
instance.serial_no += 1
|
1245 |
instance.mtime = time.time() |
1246 |
self._WriteConfig()
|
1247 |
|
1248 |
@locking.ssynchronized(_config_lock)
|
1249 |
def MarkInstanceUp(self, instance_name): |
1250 |
"""Mark the instance status to up in the config.
|
1251 |
|
1252 |
"""
|
1253 |
self._SetInstanceStatus(instance_name, constants.ADMINST_UP)
|
1254 |
|
1255 |
@locking.ssynchronized(_config_lock)
|
1256 |
def MarkInstanceOffline(self, instance_name): |
1257 |
"""Mark the instance status to down in the config.
|
1258 |
|
1259 |
"""
|
1260 |
self._SetInstanceStatus(instance_name, constants.ADMINST_OFFLINE)
|
1261 |
|
1262 |
@locking.ssynchronized(_config_lock)
|
1263 |
def RemoveInstance(self, instance_name): |
1264 |
"""Remove the instance from the configuration.
|
1265 |
|
1266 |
"""
|
1267 |
if instance_name not in self._config_data.instances: |
1268 |
raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
1269 |
|
1270 |
# If a network port has been allocated to the instance,
|
1271 |
# return it to the pool of free ports.
|
1272 |
inst = self._config_data.instances[instance_name]
|
1273 |
network_port = getattr(inst, "network_port", None) |
1274 |
if network_port is not None: |
1275 |
self._config_data.cluster.tcpudp_port_pool.add(network_port)
|
1276 |
|
1277 |
del self._config_data.instances[instance_name] |
1278 |
self._config_data.cluster.serial_no += 1 |
1279 |
self._WriteConfig()
|
1280 |
|
1281 |
@locking.ssynchronized(_config_lock)
|
1282 |
def RenameInstance(self, old_name, new_name): |
1283 |
"""Rename an instance.
|
1284 |
|
1285 |
This needs to be done in ConfigWriter and not by RemoveInstance
|
1286 |
combined with AddInstance as only we can guarantee an atomic
|
1287 |
rename.
|
1288 |
|
1289 |
"""
|
1290 |
if old_name not in self._config_data.instances: |
1291 |
raise errors.ConfigurationError("Unknown instance '%s'" % old_name) |
1292 |
|
1293 |
# Operate on a copy to not loose instance object in case of a failure
|
1294 |
inst = self._config_data.instances[old_name].Copy()
|
1295 |
inst.name = new_name |
1296 |
|
1297 |
for (idx, disk) in enumerate(inst.disks): |
1298 |
if disk.dev_type == constants.LD_FILE:
|
1299 |
# rename the file paths in logical and physical id
|
1300 |
file_storage_dir = os.path.dirname(os.path.dirname(disk.logical_id[1]))
|
1301 |
disk.logical_id = (disk.logical_id[0],
|
1302 |
utils.PathJoin(file_storage_dir, inst.name, |
1303 |
"disk%s" % idx))
|
1304 |
disk.physical_id = disk.logical_id |
1305 |
|
1306 |
# Actually replace instance object
|
1307 |
del self._config_data.instances[old_name] |
1308 |
self._config_data.instances[inst.name] = inst
|
1309 |
|
1310 |
# Force update of ssconf files
|
1311 |
self._config_data.cluster.serial_no += 1 |
1312 |
|
1313 |
self._WriteConfig()
|
1314 |
|
1315 |
@locking.ssynchronized(_config_lock)
|
1316 |
def MarkInstanceDown(self, instance_name): |
1317 |
"""Mark the status of an instance to down in the configuration.
|
1318 |
|
1319 |
"""
|
1320 |
self._SetInstanceStatus(instance_name, constants.ADMINST_DOWN)
|
1321 |
|
1322 |
def _UnlockedGetInstanceList(self): |
1323 |
"""Get the list of instances.
|
1324 |
|
1325 |
This function is for internal use, when the config lock is already held.
|
1326 |
|
1327 |
"""
|
1328 |
return self._config_data.instances.keys() |
1329 |
|
1330 |
@locking.ssynchronized(_config_lock, shared=1) |
1331 |
def GetInstanceList(self): |
1332 |
"""Get the list of instances.
|
1333 |
|
1334 |
@return: array of instances, ex. ['instance2.example.com',
|
1335 |
'instance1.example.com']
|
1336 |
|
1337 |
"""
|
1338 |
return self._UnlockedGetInstanceList() |
1339 |
|
1340 |
def ExpandInstanceName(self, short_name): |
1341 |
"""Attempt to expand an incomplete instance name.
|
1342 |
|
1343 |
"""
|
1344 |
# Locking is done in L{ConfigWriter.GetInstanceList}
|
1345 |
return _MatchNameComponentIgnoreCase(short_name, self.GetInstanceList()) |
1346 |
|
1347 |
def _UnlockedGetInstanceInfo(self, instance_name): |
1348 |
"""Returns information about an instance.
|
1349 |
|
1350 |
This function is for internal use, when the config lock is already held.
|
1351 |
|
1352 |
"""
|
1353 |
if instance_name not in self._config_data.instances: |
1354 |
return None |
1355 |
|
1356 |
return self._config_data.instances[instance_name] |
1357 |
|
1358 |
@locking.ssynchronized(_config_lock, shared=1) |
1359 |
def GetInstanceInfo(self, instance_name): |
1360 |
"""Returns information about an instance.
|
1361 |
|
1362 |
It takes the information from the configuration file. Other information of
|
1363 |
an instance are taken from the live systems.
|
1364 |
|
1365 |
@param instance_name: name of the instance, e.g.
|
1366 |
I{instance1.example.com}
|
1367 |
|
1368 |
@rtype: L{objects.Instance}
|
1369 |
@return: the instance object
|
1370 |
|
1371 |
"""
|
1372 |
return self._UnlockedGetInstanceInfo(instance_name) |
1373 |
|
1374 |
@locking.ssynchronized(_config_lock, shared=1) |
1375 |
def GetInstanceNodeGroups(self, instance_name, primary_only=False): |
1376 |
"""Returns set of node group UUIDs for instance's nodes.
|
1377 |
|
1378 |
@rtype: frozenset
|
1379 |
|
1380 |
"""
|
1381 |
instance = self._UnlockedGetInstanceInfo(instance_name)
|
1382 |
if not instance: |
1383 |
raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
1384 |
|
1385 |
if primary_only:
|
1386 |
nodes = [instance.primary_node] |
1387 |
else:
|
1388 |
nodes = instance.all_nodes |
1389 |
|
1390 |
return frozenset(self._UnlockedGetNodeInfo(node_name).group |
1391 |
for node_name in nodes) |
1392 |
|
1393 |
@locking.ssynchronized(_config_lock, shared=1) |
1394 |
def GetMultiInstanceInfo(self, instances): |
1395 |
"""Get the configuration of multiple instances.
|
1396 |
|
1397 |
@param instances: list of instance names
|
1398 |
@rtype: list
|
1399 |
@return: list of tuples (instance, instance_info), where
|
1400 |
instance_info is what would GetInstanceInfo return for the
|
1401 |
node, while keeping the original order
|
1402 |
|
1403 |
"""
|
1404 |
return [(name, self._UnlockedGetInstanceInfo(name)) for name in instances] |
1405 |
|
1406 |
@locking.ssynchronized(_config_lock, shared=1) |
1407 |
def GetAllInstancesInfo(self): |
1408 |
"""Get the configuration of all instances.
|
1409 |
|
1410 |
@rtype: dict
|
1411 |
@return: dict of (instance, instance_info), where instance_info is what
|
1412 |
would GetInstanceInfo return for the node
|
1413 |
|
1414 |
"""
|
1415 |
my_dict = dict([(instance, self._UnlockedGetInstanceInfo(instance)) |
1416 |
for instance in self._UnlockedGetInstanceList()]) |
1417 |
return my_dict
|
1418 |
|
1419 |
@locking.ssynchronized(_config_lock, shared=1) |
1420 |
def GetInstancesInfoByFilter(self, filter_fn): |
1421 |
"""Get instance configuration with a filter.
|
1422 |
|
1423 |
@type filter_fn: callable
|
1424 |
@param filter_fn: Filter function receiving instance object as parameter,
|
1425 |
returning boolean. Important: this function is called while the
|
1426 |
configuration locks is held. It must not do any complex work or call
|
1427 |
functions potentially leading to a deadlock. Ideally it doesn't call any
|
1428 |
other functions and just compares instance attributes.
|
1429 |
|
1430 |
"""
|
1431 |
return dict((name, inst) |
1432 |
for (name, inst) in self._config_data.instances.items() |
1433 |
if filter_fn(inst))
|
1434 |
|
1435 |
@locking.ssynchronized(_config_lock)
|
1436 |
def AddNode(self, node, ec_id): |
1437 |
"""Add a node to the configuration.
|
1438 |
|
1439 |
@type node: L{objects.Node}
|
1440 |
@param node: a Node instance
|
1441 |
|
1442 |
"""
|
1443 |
logging.info("Adding node %s to configuration", node.name)
|
1444 |
|
1445 |
self._EnsureUUID(node, ec_id)
|
1446 |
|
1447 |
node.serial_no = 1
|
1448 |
node.ctime = node.mtime = time.time() |
1449 |
self._UnlockedAddNodeToGroup(node.name, node.group)
|
1450 |
self._config_data.nodes[node.name] = node
|
1451 |
self._config_data.cluster.serial_no += 1 |
1452 |
self._WriteConfig()
|
1453 |
|
1454 |
@locking.ssynchronized(_config_lock)
|
1455 |
def RemoveNode(self, node_name): |
1456 |
"""Remove a node from the configuration.
|
1457 |
|
1458 |
"""
|
1459 |
logging.info("Removing node %s from configuration", node_name)
|
1460 |
|
1461 |
if node_name not in self._config_data.nodes: |
1462 |
raise errors.ConfigurationError("Unknown node '%s'" % node_name) |
1463 |
|
1464 |
self._UnlockedRemoveNodeFromGroup(self._config_data.nodes[node_name]) |
1465 |
del self._config_data.nodes[node_name] |
1466 |
self._config_data.cluster.serial_no += 1 |
1467 |
self._WriteConfig()
|
1468 |
|
1469 |
def ExpandNodeName(self, short_name): |
1470 |
"""Attempt to expand an incomplete node name.
|
1471 |
|
1472 |
"""
|
1473 |
# Locking is done in L{ConfigWriter.GetNodeList}
|
1474 |
return _MatchNameComponentIgnoreCase(short_name, self.GetNodeList()) |
1475 |
|
1476 |
def _UnlockedGetNodeInfo(self, node_name): |
1477 |
"""Get the configuration of a node, as stored in the config.
|
1478 |
|
1479 |
This function is for internal use, when the config lock is already
|
1480 |
held.
|
1481 |
|
1482 |
@param node_name: the node name, e.g. I{node1.example.com}
|
1483 |
|
1484 |
@rtype: L{objects.Node}
|
1485 |
@return: the node object
|
1486 |
|
1487 |
"""
|
1488 |
if node_name not in self._config_data.nodes: |
1489 |
return None |
1490 |
|
1491 |
return self._config_data.nodes[node_name] |
1492 |
|
1493 |
@locking.ssynchronized(_config_lock, shared=1) |
1494 |
def GetNodeInfo(self, node_name): |
1495 |
"""Get the configuration of a node, as stored in the config.
|
1496 |
|
1497 |
This is just a locked wrapper over L{_UnlockedGetNodeInfo}.
|
1498 |
|
1499 |
@param node_name: the node name, e.g. I{node1.example.com}
|
1500 |
|
1501 |
@rtype: L{objects.Node}
|
1502 |
@return: the node object
|
1503 |
|
1504 |
"""
|
1505 |
return self._UnlockedGetNodeInfo(node_name) |
1506 |
|
1507 |
@locking.ssynchronized(_config_lock, shared=1) |
1508 |
def GetNodeInstances(self, node_name): |
1509 |
"""Get the instances of a node, as stored in the config.
|
1510 |
|
1511 |
@param node_name: the node name, e.g. I{node1.example.com}
|
1512 |
|
1513 |
@rtype: (list, list)
|
1514 |
@return: a tuple with two lists: the primary and the secondary instances
|
1515 |
|
1516 |
"""
|
1517 |
pri = [] |
1518 |
sec = [] |
1519 |
for inst in self._config_data.instances.values(): |
1520 |
if inst.primary_node == node_name:
|
1521 |
pri.append(inst.name) |
1522 |
if node_name in inst.secondary_nodes: |
1523 |
sec.append(inst.name) |
1524 |
return (pri, sec)
|
1525 |
|
1526 |
@locking.ssynchronized(_config_lock, shared=1) |
1527 |
def GetNodeGroupInstances(self, uuid, primary_only=False): |
1528 |
"""Get the instances of a node group.
|
1529 |
|
1530 |
@param uuid: Node group UUID
|
1531 |
@param primary_only: Whether to only consider primary nodes
|
1532 |
@rtype: frozenset
|
1533 |
@return: List of instance names in node group
|
1534 |
|
1535 |
"""
|
1536 |
if primary_only:
|
1537 |
nodes_fn = lambda inst: [inst.primary_node]
|
1538 |
else:
|
1539 |
nodes_fn = lambda inst: inst.all_nodes
|
1540 |
|
1541 |
return frozenset(inst.name |
1542 |
for inst in self._config_data.instances.values() |
1543 |
for node_name in nodes_fn(inst) |
1544 |
if self._UnlockedGetNodeInfo(node_name).group == uuid) |
1545 |
|
1546 |
def _UnlockedGetNodeList(self): |
1547 |
"""Return the list of nodes which are in the configuration.
|
1548 |
|
1549 |
This function is for internal use, when the config lock is already
|
1550 |
held.
|
1551 |
|
1552 |
@rtype: list
|
1553 |
|
1554 |
"""
|
1555 |
return self._config_data.nodes.keys() |
1556 |
|
1557 |
@locking.ssynchronized(_config_lock, shared=1) |
1558 |
def GetNodeList(self): |
1559 |
"""Return the list of nodes which are in the configuration.
|
1560 |
|
1561 |
"""
|
1562 |
return self._UnlockedGetNodeList() |
1563 |
|
1564 |
def _UnlockedGetOnlineNodeList(self): |
1565 |
"""Return the list of nodes which are online.
|
1566 |
|
1567 |
"""
|
1568 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
1569 |
for node in self._UnlockedGetNodeList()] |
1570 |
return [node.name for node in all_nodes if not node.offline] |
1571 |
|
1572 |
@locking.ssynchronized(_config_lock, shared=1) |
1573 |
def GetOnlineNodeList(self): |
1574 |
"""Return the list of nodes which are online.
|
1575 |
|
1576 |
"""
|
1577 |
return self._UnlockedGetOnlineNodeList() |
1578 |
|
1579 |
@locking.ssynchronized(_config_lock, shared=1) |
1580 |
def GetVmCapableNodeList(self): |
1581 |
"""Return the list of nodes which are not vm capable.
|
1582 |
|
1583 |
"""
|
1584 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
1585 |
for node in self._UnlockedGetNodeList()] |
1586 |
return [node.name for node in all_nodes if node.vm_capable] |
1587 |
|
1588 |
@locking.ssynchronized(_config_lock, shared=1) |
1589 |
def GetNonVmCapableNodeList(self): |
1590 |
"""Return the list of nodes which are not vm capable.
|
1591 |
|
1592 |
"""
|
1593 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
1594 |
for node in self._UnlockedGetNodeList()] |
1595 |
return [node.name for node in all_nodes if not node.vm_capable] |
1596 |
|
1597 |
@locking.ssynchronized(_config_lock, shared=1) |
1598 |
def GetMultiNodeInfo(self, nodes): |
1599 |
"""Get the configuration of multiple nodes.
|
1600 |
|
1601 |
@param nodes: list of node names
|
1602 |
@rtype: list
|
1603 |
@return: list of tuples of (node, node_info), where node_info is
|
1604 |
what would GetNodeInfo return for the node, in the original
|
1605 |
order
|
1606 |
|
1607 |
"""
|
1608 |
return [(name, self._UnlockedGetNodeInfo(name)) for name in nodes] |
1609 |
|
1610 |
@locking.ssynchronized(_config_lock, shared=1) |
1611 |
def GetAllNodesInfo(self): |
1612 |
"""Get the configuration of all nodes.
|
1613 |
|
1614 |
@rtype: dict
|
1615 |
@return: dict of (node, node_info), where node_info is what
|
1616 |
would GetNodeInfo return for the node
|
1617 |
|
1618 |
"""
|
1619 |
return self._UnlockedGetAllNodesInfo() |
1620 |
|
1621 |
def _UnlockedGetAllNodesInfo(self): |
1622 |
"""Gets configuration of all nodes.
|
1623 |
|
1624 |
@note: See L{GetAllNodesInfo}
|
1625 |
|
1626 |
"""
|
1627 |
return dict([(node, self._UnlockedGetNodeInfo(node)) |
1628 |
for node in self._UnlockedGetNodeList()]) |
1629 |
|
1630 |
@locking.ssynchronized(_config_lock, shared=1) |
1631 |
def GetNodeGroupsFromNodes(self, nodes): |
1632 |
"""Returns groups for a list of nodes.
|
1633 |
|
1634 |
@type nodes: list of string
|
1635 |
@param nodes: List of node names
|
1636 |
@rtype: frozenset
|
1637 |
|
1638 |
"""
|
1639 |
return frozenset(self._UnlockedGetNodeInfo(name).group for name in nodes) |
1640 |
|
1641 |
def _UnlockedGetMasterCandidateStats(self, exceptions=None): |
1642 |
"""Get the number of current and maximum desired and possible candidates.
|
1643 |
|
1644 |
@type exceptions: list
|
1645 |
@param exceptions: if passed, list of nodes that should be ignored
|
1646 |
@rtype: tuple
|
1647 |
@return: tuple of (current, desired and possible, possible)
|
1648 |
|
1649 |
"""
|
1650 |
mc_now = mc_should = mc_max = 0
|
1651 |
for node in self._config_data.nodes.values(): |
1652 |
if exceptions and node.name in exceptions: |
1653 |
continue
|
1654 |
if not (node.offline or node.drained) and node.master_capable: |
1655 |
mc_max += 1
|
1656 |
if node.master_candidate:
|
1657 |
mc_now += 1
|
1658 |
mc_should = min(mc_max, self._config_data.cluster.candidate_pool_size) |
1659 |
return (mc_now, mc_should, mc_max)
|
1660 |
|
1661 |
@locking.ssynchronized(_config_lock, shared=1) |
1662 |
def GetMasterCandidateStats(self, exceptions=None): |
1663 |
"""Get the number of current and maximum possible candidates.
|
1664 |
|
1665 |
This is just a wrapper over L{_UnlockedGetMasterCandidateStats}.
|
1666 |
|
1667 |
@type exceptions: list
|
1668 |
@param exceptions: if passed, list of nodes that should be ignored
|
1669 |
@rtype: tuple
|
1670 |
@return: tuple of (current, max)
|
1671 |
|
1672 |
"""
|
1673 |
return self._UnlockedGetMasterCandidateStats(exceptions) |
1674 |
|
1675 |
@locking.ssynchronized(_config_lock)
|
1676 |
def MaintainCandidatePool(self, exceptions): |
1677 |
"""Try to grow the candidate pool to the desired size.
|
1678 |
|
1679 |
@type exceptions: list
|
1680 |
@param exceptions: if passed, list of nodes that should be ignored
|
1681 |
@rtype: list
|
1682 |
@return: list with the adjusted nodes (L{objects.Node} instances)
|
1683 |
|
1684 |
"""
|
1685 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats(exceptions)
|
1686 |
mod_list = [] |
1687 |
if mc_now < mc_max:
|
1688 |
node_list = self._config_data.nodes.keys()
|
1689 |
random.shuffle(node_list) |
1690 |
for name in node_list: |
1691 |
if mc_now >= mc_max:
|
1692 |
break
|
1693 |
node = self._config_data.nodes[name]
|
1694 |
if (node.master_candidate or node.offline or node.drained or |
1695 |
node.name in exceptions or not node.master_capable): |
1696 |
continue
|
1697 |
mod_list.append(node) |
1698 |
node.master_candidate = True
|
1699 |
node.serial_no += 1
|
1700 |
mc_now += 1
|
1701 |
if mc_now != mc_max:
|
1702 |
# this should not happen
|
1703 |
logging.warning("Warning: MaintainCandidatePool didn't manage to"
|
1704 |
" fill the candidate pool (%d/%d)", mc_now, mc_max)
|
1705 |
if mod_list:
|
1706 |
self._config_data.cluster.serial_no += 1 |
1707 |
self._WriteConfig()
|
1708 |
|
1709 |
return mod_list
|
1710 |
|
1711 |
def _UnlockedAddNodeToGroup(self, node_name, nodegroup_uuid): |
1712 |
"""Add a given node to the specified group.
|
1713 |
|
1714 |
"""
|
1715 |
if nodegroup_uuid not in self._config_data.nodegroups: |
1716 |
# This can happen if a node group gets deleted between its lookup and
|
1717 |
# when we're adding the first node to it, since we don't keep a lock in
|
1718 |
# the meantime. It's ok though, as we'll fail cleanly if the node group
|
1719 |
# is not found anymore.
|
1720 |
raise errors.OpExecError("Unknown node group: %s" % nodegroup_uuid) |
1721 |
if node_name not in self._config_data.nodegroups[nodegroup_uuid].members: |
1722 |
self._config_data.nodegroups[nodegroup_uuid].members.append(node_name)
|
1723 |
|
1724 |
def _UnlockedRemoveNodeFromGroup(self, node): |
1725 |
"""Remove a given node from its group.
|
1726 |
|
1727 |
"""
|
1728 |
nodegroup = node.group |
1729 |
if nodegroup not in self._config_data.nodegroups: |
1730 |
logging.warning("Warning: node '%s' has unknown node group '%s'"
|
1731 |
" (while being removed from it)", node.name, nodegroup)
|
1732 |
nodegroup_obj = self._config_data.nodegroups[nodegroup]
|
1733 |
if node.name not in nodegroup_obj.members: |
1734 |
logging.warning("Warning: node '%s' not a member of its node group '%s'"
|
1735 |
" (while being removed from it)", node.name, nodegroup)
|
1736 |
else:
|
1737 |
nodegroup_obj.members.remove(node.name) |
1738 |
|
1739 |
@locking.ssynchronized(_config_lock)
|
1740 |
def AssignGroupNodes(self, mods): |
1741 |
"""Changes the group of a number of nodes.
|
1742 |
|
1743 |
@type mods: list of tuples; (node name, new group UUID)
|
1744 |
@param mods: Node membership modifications
|
1745 |
|
1746 |
"""
|
1747 |
groups = self._config_data.nodegroups
|
1748 |
nodes = self._config_data.nodes
|
1749 |
|
1750 |
resmod = [] |
1751 |
|
1752 |
# Try to resolve names/UUIDs first
|
1753 |
for (node_name, new_group_uuid) in mods: |
1754 |
try:
|
1755 |
node = nodes[node_name] |
1756 |
except KeyError: |
1757 |
raise errors.ConfigurationError("Unable to find node '%s'" % node_name) |
1758 |
|
1759 |
if node.group == new_group_uuid:
|
1760 |
# Node is being assigned to its current group
|
1761 |
logging.debug("Node '%s' was assigned to its current group (%s)",
|
1762 |
node_name, node.group) |
1763 |
continue
|
1764 |
|
1765 |
# Try to find current group of node
|
1766 |
try:
|
1767 |
old_group = groups[node.group] |
1768 |
except KeyError: |
1769 |
raise errors.ConfigurationError("Unable to find old group '%s'" % |
1770 |
node.group) |
1771 |
|
1772 |
# Try to find new group for node
|
1773 |
try:
|
1774 |
new_group = groups[new_group_uuid] |
1775 |
except KeyError: |
1776 |
raise errors.ConfigurationError("Unable to find new group '%s'" % |
1777 |
new_group_uuid) |
1778 |
|
1779 |
assert node.name in old_group.members, \ |
1780 |
("Inconsistent configuration: node '%s' not listed in members for its"
|
1781 |
" old group '%s'" % (node.name, old_group.uuid))
|
1782 |
assert node.name not in new_group.members, \ |
1783 |
("Inconsistent configuration: node '%s' already listed in members for"
|
1784 |
" its new group '%s'" % (node.name, new_group.uuid))
|
1785 |
|
1786 |
resmod.append((node, old_group, new_group)) |
1787 |
|
1788 |
# Apply changes
|
1789 |
for (node, old_group, new_group) in resmod: |
1790 |
assert node.uuid != new_group.uuid and old_group.uuid != new_group.uuid, \ |
1791 |
"Assigning to current group is not possible"
|
1792 |
|
1793 |
node.group = new_group.uuid |
1794 |
|
1795 |
# Update members of involved groups
|
1796 |
if node.name in old_group.members: |
1797 |
old_group.members.remove(node.name) |
1798 |
if node.name not in new_group.members: |
1799 |
new_group.members.append(node.name) |
1800 |
|
1801 |
# Update timestamps and serials (only once per node/group object)
|
1802 |
now = time.time() |
1803 |
for obj in frozenset(itertools.chain(*resmod)): # pylint: disable=W0142 |
1804 |
obj.serial_no += 1
|
1805 |
obj.mtime = now |
1806 |
|
1807 |
# Force ssconf update
|
1808 |
self._config_data.cluster.serial_no += 1 |
1809 |
|
1810 |
self._WriteConfig()
|
1811 |
|
1812 |
def _BumpSerialNo(self): |
1813 |
"""Bump up the serial number of the config.
|
1814 |
|
1815 |
"""
|
1816 |
self._config_data.serial_no += 1 |
1817 |
self._config_data.mtime = time.time()
|
1818 |
|
1819 |
def _AllUUIDObjects(self): |
1820 |
"""Returns all objects with uuid attributes.
|
1821 |
|
1822 |
"""
|
1823 |
return (self._config_data.instances.values() + |
1824 |
self._config_data.nodes.values() +
|
1825 |
self._config_data.nodegroups.values() +
|
1826 |
[self._config_data.cluster])
|
1827 |
|
1828 |
def _OpenConfig(self, accept_foreign): |
1829 |
"""Read the config data from disk.
|
1830 |
|
1831 |
"""
|
1832 |
raw_data = utils.ReadFile(self._cfg_file)
|
1833 |
|
1834 |
try:
|
1835 |
data = objects.ConfigData.FromDict(serializer.Load(raw_data)) |
1836 |
except Exception, err: |
1837 |
raise errors.ConfigurationError(err)
|
1838 |
|
1839 |
# Make sure the configuration has the right version
|
1840 |
_ValidateConfig(data) |
1841 |
|
1842 |
if (not hasattr(data, "cluster") or |
1843 |
not hasattr(data.cluster, "rsahostkeypub")): |
1844 |
raise errors.ConfigurationError("Incomplete configuration" |
1845 |
" (missing cluster.rsahostkeypub)")
|
1846 |
|
1847 |
if data.cluster.master_node != self._my_hostname and not accept_foreign: |
1848 |
msg = ("The configuration denotes node %s as master, while my"
|
1849 |
" hostname is %s; opening a foreign configuration is only"
|
1850 |
" possible in accept_foreign mode" %
|
1851 |
(data.cluster.master_node, self._my_hostname))
|
1852 |
raise errors.ConfigurationError(msg)
|
1853 |
|
1854 |
# Upgrade configuration if needed
|
1855 |
data.UpgradeConfig() |
1856 |
|
1857 |
self._config_data = data
|
1858 |
# reset the last serial as -1 so that the next write will cause
|
1859 |
# ssconf update
|
1860 |
self._last_cluster_serial = -1 |
1861 |
|
1862 |
# And finally run our (custom) config upgrade sequence
|
1863 |
self._UpgradeConfig()
|
1864 |
|
1865 |
self._cfg_id = utils.GetFileID(path=self._cfg_file) |
1866 |
|
1867 |
def _UpgradeConfig(self): |
1868 |
"""Run upgrade steps that cannot be done purely in the objects.
|
1869 |
|
1870 |
This is because some data elements need uniqueness across the
|
1871 |
whole configuration, etc.
|
1872 |
|
1873 |
@warning: this function will call L{_WriteConfig()}, but also
|
1874 |
L{DropECReservations} so it needs to be called only from a
|
1875 |
"safe" place (the constructor). If one wanted to call it with
|
1876 |
the lock held, a DropECReservationUnlocked would need to be
|
1877 |
created first, to avoid causing deadlock.
|
1878 |
|
1879 |
"""
|
1880 |
modified = False
|
1881 |
for item in self._AllUUIDObjects(): |
1882 |
if item.uuid is None: |
1883 |
item.uuid = self._GenerateUniqueID(_UPGRADE_CONFIG_JID)
|
1884 |
modified = True
|
1885 |
if not self._config_data.nodegroups: |
1886 |
default_nodegroup_name = constants.INITIAL_NODE_GROUP_NAME |
1887 |
default_nodegroup = objects.NodeGroup(name=default_nodegroup_name, |
1888 |
members=[]) |
1889 |
self._UnlockedAddNodeGroup(default_nodegroup, _UPGRADE_CONFIG_JID, True) |
1890 |
modified = True
|
1891 |
for node in self._config_data.nodes.values(): |
1892 |
if not node.group: |
1893 |
node.group = self.LookupNodeGroup(None) |
1894 |
modified = True
|
1895 |
# This is technically *not* an upgrade, but needs to be done both when
|
1896 |
# nodegroups are being added, and upon normally loading the config,
|
1897 |
# because the members list of a node group is discarded upon
|
1898 |
# serializing/deserializing the object.
|
1899 |
self._UnlockedAddNodeToGroup(node.name, node.group)
|
1900 |
if modified:
|
1901 |
self._WriteConfig()
|
1902 |
# This is ok even if it acquires the internal lock, as _UpgradeConfig is
|
1903 |
# only called at config init time, without the lock held
|
1904 |
self.DropECReservations(_UPGRADE_CONFIG_JID)
|
1905 |
|
1906 |
def _DistributeConfig(self, feedback_fn): |
1907 |
"""Distribute the configuration to the other nodes.
|
1908 |
|
1909 |
Currently, this only copies the configuration file. In the future,
|
1910 |
it could be used to encapsulate the 2/3-phase update mechanism.
|
1911 |
|
1912 |
"""
|
1913 |
if self._offline: |
1914 |
return True |
1915 |
|
1916 |
bad = False
|
1917 |
|
1918 |
node_list = [] |
1919 |
addr_list = [] |
1920 |
myhostname = self._my_hostname
|
1921 |
# we can skip checking whether _UnlockedGetNodeInfo returns None
|
1922 |
# since the node list comes from _UnlocketGetNodeList, and we are
|
1923 |
# called with the lock held, so no modifications should take place
|
1924 |
# in between
|
1925 |
for node_name in self._UnlockedGetNodeList(): |
1926 |
if node_name == myhostname:
|
1927 |
continue
|
1928 |
node_info = self._UnlockedGetNodeInfo(node_name)
|
1929 |
if not node_info.master_candidate: |
1930 |
continue
|
1931 |
node_list.append(node_info.name) |
1932 |
addr_list.append(node_info.primary_ip) |
1933 |
|
1934 |
# TODO: Use dedicated resolver talking to config writer for name resolution
|
1935 |
result = \ |
1936 |
self._GetRpc(addr_list).call_upload_file(node_list, self._cfg_file) |
1937 |
for to_node, to_result in result.items(): |
1938 |
msg = to_result.fail_msg |
1939 |
if msg:
|
1940 |
msg = ("Copy of file %s to node %s failed: %s" %
|
1941 |
(self._cfg_file, to_node, msg))
|
1942 |
logging.error(msg) |
1943 |
|
1944 |
if feedback_fn:
|
1945 |
feedback_fn(msg) |
1946 |
|
1947 |
bad = True
|
1948 |
|
1949 |
return not bad |
1950 |
|
1951 |
def _WriteConfig(self, destination=None, feedback_fn=None): |
1952 |
"""Write the configuration data to persistent storage.
|
1953 |
|
1954 |
"""
|
1955 |
assert feedback_fn is None or callable(feedback_fn) |
1956 |
|
1957 |
# Warn on config errors, but don't abort the save - the
|
1958 |
# configuration has already been modified, and we can't revert;
|
1959 |
# the best we can do is to warn the user and save as is, leaving
|
1960 |
# recovery to the user
|
1961 |
config_errors = self._UnlockedVerifyConfig()
|
1962 |
if config_errors:
|
1963 |
errmsg = ("Configuration data is not consistent: %s" %
|
1964 |
(utils.CommaJoin(config_errors))) |
1965 |
logging.critical(errmsg) |
1966 |
if feedback_fn:
|
1967 |
feedback_fn(errmsg) |
1968 |
|
1969 |
if destination is None: |
1970 |
destination = self._cfg_file
|
1971 |
self._BumpSerialNo()
|
1972 |
txt = serializer.Dump(self._config_data.ToDict())
|
1973 |
|
1974 |
getents = self._getents()
|
1975 |
try:
|
1976 |
fd = utils.SafeWriteFile(destination, self._cfg_id, data=txt,
|
1977 |
close=False, gid=getents.confd_gid, mode=0640) |
1978 |
except errors.LockError:
|
1979 |
raise errors.ConfigurationError("The configuration file has been" |
1980 |
" modified since the last write, cannot"
|
1981 |
" update")
|
1982 |
try:
|
1983 |
self._cfg_id = utils.GetFileID(fd=fd)
|
1984 |
finally:
|
1985 |
os.close(fd) |
1986 |
|
1987 |
self.write_count += 1 |
1988 |
|
1989 |
# and redistribute the config file to master candidates
|
1990 |
self._DistributeConfig(feedback_fn)
|
1991 |
|
1992 |
# Write ssconf files on all nodes (including locally)
|
1993 |
if self._last_cluster_serial < self._config_data.cluster.serial_no: |
1994 |
if not self._offline: |
1995 |
result = self._GetRpc(None).call_write_ssconf_files( |
1996 |
self._UnlockedGetOnlineNodeList(),
|
1997 |
self._UnlockedGetSsconfValues())
|
1998 |
|
1999 |
for nname, nresu in result.items(): |
2000 |
msg = nresu.fail_msg |
2001 |
if msg:
|
2002 |
errmsg = ("Error while uploading ssconf files to"
|
2003 |
" node %s: %s" % (nname, msg))
|
2004 |
logging.warning(errmsg) |
2005 |
|
2006 |
if feedback_fn:
|
2007 |
feedback_fn(errmsg) |
2008 |
|
2009 |
self._last_cluster_serial = self._config_data.cluster.serial_no |
2010 |
|
2011 |
def _UnlockedGetSsconfValues(self): |
2012 |
"""Return the values needed by ssconf.
|
2013 |
|
2014 |
@rtype: dict
|
2015 |
@return: a dictionary with keys the ssconf names and values their
|
2016 |
associated value
|
2017 |
|
2018 |
"""
|
2019 |
fn = "\n".join
|
2020 |
instance_names = utils.NiceSort(self._UnlockedGetInstanceList())
|
2021 |
node_names = utils.NiceSort(self._UnlockedGetNodeList())
|
2022 |
node_info = [self._UnlockedGetNodeInfo(name) for name in node_names] |
2023 |
node_pri_ips = ["%s %s" % (ninfo.name, ninfo.primary_ip)
|
2024 |
for ninfo in node_info] |
2025 |
node_snd_ips = ["%s %s" % (ninfo.name, ninfo.secondary_ip)
|
2026 |
for ninfo in node_info] |
2027 |
|
2028 |
instance_data = fn(instance_names) |
2029 |
off_data = fn(node.name for node in node_info if node.offline) |
2030 |
on_data = fn(node.name for node in node_info if not node.offline) |
2031 |
mc_data = fn(node.name for node in node_info if node.master_candidate) |
2032 |
mc_ips_data = fn(node.primary_ip for node in node_info |
2033 |
if node.master_candidate)
|
2034 |
node_data = fn(node_names) |
2035 |
node_pri_ips_data = fn(node_pri_ips) |
2036 |
node_snd_ips_data = fn(node_snd_ips) |
2037 |
|
2038 |
cluster = self._config_data.cluster
|
2039 |
cluster_tags = fn(cluster.GetTags()) |
2040 |
|
2041 |
hypervisor_list = fn(cluster.enabled_hypervisors) |
2042 |
|
2043 |
uid_pool = uidpool.FormatUidPool(cluster.uid_pool, separator="\n")
|
2044 |
|
2045 |
nodegroups = ["%s %s" % (nodegroup.uuid, nodegroup.name) for nodegroup in |
2046 |
self._config_data.nodegroups.values()]
|
2047 |
nodegroups_data = fn(utils.NiceSort(nodegroups)) |
2048 |
|
2049 |
ssconf_values = { |
2050 |
constants.SS_CLUSTER_NAME: cluster.cluster_name, |
2051 |
constants.SS_CLUSTER_TAGS: cluster_tags, |
2052 |
constants.SS_FILE_STORAGE_DIR: cluster.file_storage_dir, |
2053 |
constants.SS_SHARED_FILE_STORAGE_DIR: cluster.shared_file_storage_dir, |
2054 |
constants.SS_MASTER_CANDIDATES: mc_data, |
2055 |
constants.SS_MASTER_CANDIDATES_IPS: mc_ips_data, |
2056 |
constants.SS_MASTER_IP: cluster.master_ip, |
2057 |
constants.SS_MASTER_NETDEV: cluster.master_netdev, |
2058 |
constants.SS_MASTER_NETMASK: str(cluster.master_netmask),
|
2059 |
constants.SS_MASTER_NODE: cluster.master_node, |
2060 |
constants.SS_NODE_LIST: node_data, |
2061 |
constants.SS_NODE_PRIMARY_IPS: node_pri_ips_data, |
2062 |
constants.SS_NODE_SECONDARY_IPS: node_snd_ips_data, |
2063 |
constants.SS_OFFLINE_NODES: off_data, |
2064 |
constants.SS_ONLINE_NODES: on_data, |
2065 |
constants.SS_PRIMARY_IP_FAMILY: str(cluster.primary_ip_family),
|
2066 |
constants.SS_INSTANCE_LIST: instance_data, |
2067 |
constants.SS_RELEASE_VERSION: constants.RELEASE_VERSION, |
2068 |
constants.SS_HYPERVISOR_LIST: hypervisor_list, |
2069 |
constants.SS_MAINTAIN_NODE_HEALTH: str(cluster.maintain_node_health),
|
2070 |
constants.SS_UID_POOL: uid_pool, |
2071 |
constants.SS_NODEGROUPS: nodegroups_data, |
2072 |
} |
2073 |
bad_values = [(k, v) for k, v in ssconf_values.items() |
2074 |
if not isinstance(v, (str, basestring))] |
2075 |
if bad_values:
|
2076 |
err = utils.CommaJoin("%s=%s" % (k, v) for k, v in bad_values) |
2077 |
raise errors.ConfigurationError("Some ssconf key(s) have non-string" |
2078 |
" values: %s" % err)
|
2079 |
return ssconf_values
|
2080 |
|
2081 |
@locking.ssynchronized(_config_lock, shared=1) |
2082 |
def GetSsconfValues(self): |
2083 |
"""Wrapper using lock around _UnlockedGetSsconf().
|
2084 |
|
2085 |
"""
|
2086 |
return self._UnlockedGetSsconfValues() |
2087 |
|
2088 |
@locking.ssynchronized(_config_lock, shared=1) |
2089 |
def GetVGName(self): |
2090 |
"""Return the volume group name.
|
2091 |
|
2092 |
"""
|
2093 |
return self._config_data.cluster.volume_group_name |
2094 |
|
2095 |
@locking.ssynchronized(_config_lock)
|
2096 |
def SetVGName(self, vg_name): |
2097 |
"""Set the volume group name.
|
2098 |
|
2099 |
"""
|
2100 |
self._config_data.cluster.volume_group_name = vg_name
|
2101 |
self._config_data.cluster.serial_no += 1 |
2102 |
self._WriteConfig()
|
2103 |
|
2104 |
@locking.ssynchronized(_config_lock, shared=1) |
2105 |
def GetDRBDHelper(self): |
2106 |
"""Return DRBD usermode helper.
|
2107 |
|
2108 |
"""
|
2109 |
return self._config_data.cluster.drbd_usermode_helper |
2110 |
|
2111 |
@locking.ssynchronized(_config_lock)
|
2112 |
def SetDRBDHelper(self, drbd_helper): |
2113 |
"""Set DRBD usermode helper.
|
2114 |
|
2115 |
"""
|
2116 |
self._config_data.cluster.drbd_usermode_helper = drbd_helper
|
2117 |
self._config_data.cluster.serial_no += 1 |
2118 |
self._WriteConfig()
|
2119 |
|
2120 |
@locking.ssynchronized(_config_lock, shared=1) |
2121 |
def GetMACPrefix(self): |
2122 |
"""Return the mac prefix.
|
2123 |
|
2124 |
"""
|
2125 |
return self._config_data.cluster.mac_prefix |
2126 |
|
2127 |
@locking.ssynchronized(_config_lock, shared=1) |
2128 |
def GetClusterInfo(self): |
2129 |
"""Returns information about the cluster
|
2130 |
|
2131 |
@rtype: L{objects.Cluster}
|
2132 |
@return: the cluster object
|
2133 |
|
2134 |
"""
|
2135 |
return self._config_data.cluster |
2136 |
|
2137 |
@locking.ssynchronized(_config_lock, shared=1) |
2138 |
def HasAnyDiskOfType(self, dev_type): |
2139 |
"""Check if in there is at disk of the given type in the configuration.
|
2140 |
|
2141 |
"""
|
2142 |
return self._config_data.HasAnyDiskOfType(dev_type) |
2143 |
|
2144 |
@locking.ssynchronized(_config_lock)
|
2145 |
def Update(self, target, feedback_fn): |
2146 |
"""Notify function to be called after updates.
|
2147 |
|
2148 |
This function must be called when an object (as returned by
|
2149 |
GetInstanceInfo, GetNodeInfo, GetCluster) has been updated and the
|
2150 |
caller wants the modifications saved to the backing store. Note
|
2151 |
that all modified objects will be saved, but the target argument
|
2152 |
is the one the caller wants to ensure that it's saved.
|
2153 |
|
2154 |
@param target: an instance of either L{objects.Cluster},
|
2155 |
L{objects.Node} or L{objects.Instance} which is existing in
|
2156 |
the cluster
|
2157 |
@param feedback_fn: Callable feedback function
|
2158 |
|
2159 |
"""
|
2160 |
if self._config_data is None: |
2161 |
raise errors.ProgrammerError("Configuration file not read," |
2162 |
" cannot save.")
|
2163 |
update_serial = False
|
2164 |
if isinstance(target, objects.Cluster): |
2165 |
test = target == self._config_data.cluster
|
2166 |
elif isinstance(target, objects.Node): |
2167 |
test = target in self._config_data.nodes.values() |
2168 |
update_serial = True
|
2169 |
elif isinstance(target, objects.Instance): |
2170 |
test = target in self._config_data.instances.values() |
2171 |
elif isinstance(target, objects.NodeGroup): |
2172 |
test = target in self._config_data.nodegroups.values() |
2173 |
else:
|
2174 |
raise errors.ProgrammerError("Invalid object type (%s) passed to" |
2175 |
" ConfigWriter.Update" % type(target)) |
2176 |
if not test: |
2177 |
raise errors.ConfigurationError("Configuration updated since object" |
2178 |
" has been read or unknown object")
|
2179 |
target.serial_no += 1
|
2180 |
target.mtime = now = time.time() |
2181 |
|
2182 |
if update_serial:
|
2183 |
# for node updates, we need to increase the cluster serial too
|
2184 |
self._config_data.cluster.serial_no += 1 |
2185 |
self._config_data.cluster.mtime = now
|
2186 |
|
2187 |
if isinstance(target, objects.Instance): |
2188 |
self._UnlockedReleaseDRBDMinors(target.name)
|
2189 |
|
2190 |
self._WriteConfig(feedback_fn=feedback_fn)
|
2191 |
|
2192 |
@locking.ssynchronized(_config_lock)
|
2193 |
def DropECReservations(self, ec_id): |
2194 |
"""Drop per-execution-context reservations
|
2195 |
|
2196 |
"""
|
2197 |
for rm in self._all_rms: |
2198 |
rm.DropECReservations(ec_id) |