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#
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#
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# Copyright (C) 2006, 2007, 2008 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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"""Module implementing the master-side code."""
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# pylint: disable-msg=W0613,W0201
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import os
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import os.path
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import time
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import tempfile
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import re
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import platform
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import logging
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import copy
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import random
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from ganeti import ssh
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from ganeti import utils
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from ganeti import errors
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from ganeti import hypervisor
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from ganeti import locking
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from ganeti import constants
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from ganeti import objects
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from ganeti import opcodes
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from ganeti import serializer
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from ganeti import ssconf
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class LogicalUnit(object):
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  """Logical Unit base class.
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  Subclasses must follow these rules:
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    - implement ExpandNames
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    - implement CheckPrereq
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    - implement Exec
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    - implement BuildHooksEnv
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    - redefine HPATH and HTYPE
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    - optionally redefine their run requirements:
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        REQ_BGL: the LU needs to hold the Big Ganeti Lock exclusively
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  Note that all commands require root permissions.
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  """
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  HPATH = None
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  HTYPE = None
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  _OP_REQP = []
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  REQ_BGL = True
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  def __init__(self, processor, op, context, rpc):
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    """Constructor for LogicalUnit.
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    This needs to be overriden in derived classes in order to check op
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    validity.
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    """
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    self.proc = processor
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    self.op = op
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    self.cfg = context.cfg
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    self.context = context
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    self.rpc = rpc
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    # Dicts used to declare locking needs to mcpu
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    self.needed_locks = None
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    self.acquired_locks = {}
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    self.share_locks = dict(((i, 0) for i in locking.LEVELS))
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    self.add_locks = {}
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    self.remove_locks = {}
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    # Used to force good behavior when calling helper functions
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    self.recalculate_locks = {}
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    self.__ssh = None
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    # logging
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    self.LogWarning = processor.LogWarning
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    self.LogInfo = processor.LogInfo
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93
    for attr_name in self._OP_REQP:
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      attr_val = getattr(op, attr_name, None)
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      if attr_val is None:
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        raise errors.OpPrereqError("Required parameter '%s' missing" %
97
                                   attr_name)
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    self.CheckArguments()
99

    
100
  def __GetSSH(self):
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    """Returns the SshRunner object
102

103
    """
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    if not self.__ssh:
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      self.__ssh = ssh.SshRunner(self.cfg.GetClusterName())
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    return self.__ssh
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108
  ssh = property(fget=__GetSSH)
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  def CheckArguments(self):
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    """Check syntactic validity for the opcode arguments.
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    This method is for doing a simple syntactic check and ensure
114
    validity of opcode parameters, without any cluster-related
115
    checks. While the same can be accomplished in ExpandNames and/or
116
    CheckPrereq, doing these separate is better because:
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118
      - ExpandNames is left as as purely a lock-related function
119
      - CheckPrereq is run after we have aquired locks (and possible
120
        waited for them)
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122
    The function is allowed to change the self.op attribute so that
123
    later methods can no longer worry about missing parameters.
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125
    """
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    pass
127

    
128
  def ExpandNames(self):
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    """Expand names for this LU.
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131
    This method is called before starting to execute the opcode, and it should
132
    update all the parameters of the opcode to their canonical form (e.g. a
133
    short node name must be fully expanded after this method has successfully
134
    completed). This way locking, hooks, logging, ecc. can work correctly.
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    LUs which implement this method must also populate the self.needed_locks
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    member, as a dict with lock levels as keys, and a list of needed lock names
138
    as values. Rules:
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140
      - use an empty dict if you don't need any lock
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      - if you don't need any lock at a particular level omit that level
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      - don't put anything for the BGL level
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      - if you want all locks at a level use locking.ALL_SET as a value
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    If you need to share locks (rather than acquire them exclusively) at one
146
    level you can modify self.share_locks, setting a true value (usually 1) for
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    that level. By default locks are not shared.
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    Examples::
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      # Acquire all nodes and one instance
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      self.needed_locks = {
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        locking.LEVEL_NODE: locking.ALL_SET,
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        locking.LEVEL_INSTANCE: ['instance1.example.tld'],
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      }
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      # Acquire just two nodes
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      self.needed_locks = {
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        locking.LEVEL_NODE: ['node1.example.tld', 'node2.example.tld'],
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      }
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      # Acquire no locks
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      self.needed_locks = {} # No, you can't leave it to the default value None
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163
    """
164
    # The implementation of this method is mandatory only if the new LU is
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    # concurrent, so that old LUs don't need to be changed all at the same
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    # time.
167
    if self.REQ_BGL:
168
      self.needed_locks = {} # Exclusive LUs don't need locks.
169
    else:
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      raise NotImplementedError
171

    
172
  def DeclareLocks(self, level):
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    """Declare LU locking needs for a level
174

175
    While most LUs can just declare their locking needs at ExpandNames time,
176
    sometimes there's the need to calculate some locks after having acquired
177
    the ones before. This function is called just before acquiring locks at a
178
    particular level, but after acquiring the ones at lower levels, and permits
179
    such calculations. It can be used to modify self.needed_locks, and by
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    default it does nothing.
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182
    This function is only called if you have something already set in
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    self.needed_locks for the level.
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    @param level: Locking level which is going to be locked
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    @type level: member of ganeti.locking.LEVELS
187

188
    """
189

    
190
  def CheckPrereq(self):
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    """Check prerequisites for this LU.
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193
    This method should check that the prerequisites for the execution
194
    of this LU are fulfilled. It can do internode communication, but
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    it should be idempotent - no cluster or system changes are
196
    allowed.
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198
    The method should raise errors.OpPrereqError in case something is
199
    not fulfilled. Its return value is ignored.
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201
    This method should also update all the parameters of the opcode to
202
    their canonical form if it hasn't been done by ExpandNames before.
203

204
    """
205
    raise NotImplementedError
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207
  def Exec(self, feedback_fn):
208
    """Execute the LU.
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210
    This method should implement the actual work. It should raise
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    errors.OpExecError for failures that are somewhat dealt with in
212
    code, or expected.
213

214
    """
215
    raise NotImplementedError
216

    
217
  def BuildHooksEnv(self):
218
    """Build hooks environment for this LU.
219

220
    This method should return a three-node tuple consisting of: a dict
221
    containing the environment that will be used for running the
222
    specific hook for this LU, a list of node names on which the hook
223
    should run before the execution, and a list of node names on which
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    the hook should run after the execution.
225

226
    The keys of the dict must not have 'GANETI_' prefixed as this will
227
    be handled in the hooks runner. Also note additional keys will be
228
    added by the hooks runner. If the LU doesn't define any
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    environment, an empty dict (and not None) should be returned.
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231
    No nodes should be returned as an empty list (and not None).
232

233
    Note that if the HPATH for a LU class is None, this function will
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    not be called.
235

236
    """
237
    raise NotImplementedError
238

    
239
  def HooksCallBack(self, phase, hook_results, feedback_fn, lu_result):
240
    """Notify the LU about the results of its hooks.
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242
    This method is called every time a hooks phase is executed, and notifies
243
    the Logical Unit about the hooks' result. The LU can then use it to alter
244
    its result based on the hooks.  By default the method does nothing and the
245
    previous result is passed back unchanged but any LU can define it if it
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    wants to use the local cluster hook-scripts somehow.
247

248
    @param phase: one of L{constants.HOOKS_PHASE_POST} or
249
        L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
250
    @param hook_results: the results of the multi-node hooks rpc call
251
    @param feedback_fn: function used send feedback back to the caller
252
    @param lu_result: the previous Exec result this LU had, or None
253
        in the PRE phase
254
    @return: the new Exec result, based on the previous result
255
        and hook results
256

257
    """
258
    return lu_result
259

    
260
  def _ExpandAndLockInstance(self):
261
    """Helper function to expand and lock an instance.
262

263
    Many LUs that work on an instance take its name in self.op.instance_name
264
    and need to expand it and then declare the expanded name for locking. This
265
    function does it, and then updates self.op.instance_name to the expanded
266
    name. It also initializes needed_locks as a dict, if this hasn't been done
267
    before.
268

269
    """
270
    if self.needed_locks is None:
271
      self.needed_locks = {}
272
    else:
273
      assert locking.LEVEL_INSTANCE not in self.needed_locks, \
274
        "_ExpandAndLockInstance called with instance-level locks set"
275
    expanded_name = self.cfg.ExpandInstanceName(self.op.instance_name)
276
    if expanded_name is None:
277
      raise errors.OpPrereqError("Instance '%s' not known" %
278
                                  self.op.instance_name)
279
    self.needed_locks[locking.LEVEL_INSTANCE] = expanded_name
280
    self.op.instance_name = expanded_name
281

    
282
  def _LockInstancesNodes(self, primary_only=False):
283
    """Helper function to declare instances' nodes for locking.
284

285
    This function should be called after locking one or more instances to lock
286
    their nodes. Its effect is populating self.needed_locks[locking.LEVEL_NODE]
287
    with all primary or secondary nodes for instances already locked and
288
    present in self.needed_locks[locking.LEVEL_INSTANCE].
289

290
    It should be called from DeclareLocks, and for safety only works if
291
    self.recalculate_locks[locking.LEVEL_NODE] is set.
292

293
    In the future it may grow parameters to just lock some instance's nodes, or
294
    to just lock primaries or secondary nodes, if needed.
295

296
    If should be called in DeclareLocks in a way similar to::
297

298
      if level == locking.LEVEL_NODE:
299
        self._LockInstancesNodes()
300

301
    @type primary_only: boolean
302
    @param primary_only: only lock primary nodes of locked instances
303

304
    """
305
    assert locking.LEVEL_NODE in self.recalculate_locks, \
306
      "_LockInstancesNodes helper function called with no nodes to recalculate"
307

    
308
    # TODO: check if we're really been called with the instance locks held
309

    
310
    # For now we'll replace self.needed_locks[locking.LEVEL_NODE], but in the
311
    # future we might want to have different behaviors depending on the value
312
    # of self.recalculate_locks[locking.LEVEL_NODE]
313
    wanted_nodes = []
314
    for instance_name in self.acquired_locks[locking.LEVEL_INSTANCE]:
315
      instance = self.context.cfg.GetInstanceInfo(instance_name)
316
      wanted_nodes.append(instance.primary_node)
317
      if not primary_only:
318
        wanted_nodes.extend(instance.secondary_nodes)
319

    
320
    if self.recalculate_locks[locking.LEVEL_NODE] == constants.LOCKS_REPLACE:
321
      self.needed_locks[locking.LEVEL_NODE] = wanted_nodes
322
    elif self.recalculate_locks[locking.LEVEL_NODE] == constants.LOCKS_APPEND:
323
      self.needed_locks[locking.LEVEL_NODE].extend(wanted_nodes)
324

    
325
    del self.recalculate_locks[locking.LEVEL_NODE]
326

    
327

    
328
class NoHooksLU(LogicalUnit):
329
  """Simple LU which runs no hooks.
330

331
  This LU is intended as a parent for other LogicalUnits which will
332
  run no hooks, in order to reduce duplicate code.
333

334
  """
335
  HPATH = None
336
  HTYPE = None
337

    
338

    
339
def _GetWantedNodes(lu, nodes):
340
  """Returns list of checked and expanded node names.
341

342
  @type lu: L{LogicalUnit}
343
  @param lu: the logical unit on whose behalf we execute
344
  @type nodes: list
345
  @param nodes: list of node names or None for all nodes
346
  @rtype: list
347
  @return: the list of nodes, sorted
348
  @raise errors.OpProgrammerError: if the nodes parameter is wrong type
349

350
  """
351
  if not isinstance(nodes, list):
352
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
353

    
354
  if not nodes:
355
    raise errors.ProgrammerError("_GetWantedNodes should only be called with a"
356
      " non-empty list of nodes whose name is to be expanded.")
357

    
358
  wanted = []
359
  for name in nodes:
360
    node = lu.cfg.ExpandNodeName(name)
361
    if node is None:
362
      raise errors.OpPrereqError("No such node name '%s'" % name)
363
    wanted.append(node)
364

    
365
  return utils.NiceSort(wanted)
366

    
367

    
368
def _GetWantedInstances(lu, instances):
369
  """Returns list of checked and expanded instance names.
370

371
  @type lu: L{LogicalUnit}
372
  @param lu: the logical unit on whose behalf we execute
373
  @type instances: list
374
  @param instances: list of instance names or None for all instances
375
  @rtype: list
376
  @return: the list of instances, sorted
377
  @raise errors.OpPrereqError: if the instances parameter is wrong type
378
  @raise errors.OpPrereqError: if any of the passed instances is not found
379

380
  """
381
  if not isinstance(instances, list):
382
    raise errors.OpPrereqError("Invalid argument type 'instances'")
383

    
384
  if instances:
385
    wanted = []
386

    
387
    for name in instances:
388
      instance = lu.cfg.ExpandInstanceName(name)
389
      if instance is None:
390
        raise errors.OpPrereqError("No such instance name '%s'" % name)
391
      wanted.append(instance)
392

    
393
  else:
394
    wanted = utils.NiceSort(lu.cfg.GetInstanceList())
395
  return wanted
396

    
397

    
398
def _CheckOutputFields(static, dynamic, selected):
399
  """Checks whether all selected fields are valid.
400

401
  @type static: L{utils.FieldSet}
402
  @param static: static fields set
403
  @type dynamic: L{utils.FieldSet}
404
  @param dynamic: dynamic fields set
405

406
  """
407
  f = utils.FieldSet()
408
  f.Extend(static)
409
  f.Extend(dynamic)
410

    
411
  delta = f.NonMatching(selected)
412
  if delta:
413
    raise errors.OpPrereqError("Unknown output fields selected: %s"
414
                               % ",".join(delta))
415

    
416

    
417
def _CheckBooleanOpField(op, name):
418
  """Validates boolean opcode parameters.
419

420
  This will ensure that an opcode parameter is either a boolean value,
421
  or None (but that it always exists).
422

423
  """
424
  val = getattr(op, name, None)
425
  if not (val is None or isinstance(val, bool)):
426
    raise errors.OpPrereqError("Invalid boolean parameter '%s' (%s)" %
427
                               (name, str(val)))
428
  setattr(op, name, val)
429

    
430

    
431
def _CheckNodeOnline(lu, node):
432
  """Ensure that a given node is online.
433

434
  @param lu: the LU on behalf of which we make the check
435
  @param node: the node to check
436
  @raise errors.OpPrereqError: if the node is offline
437

438
  """
439
  if lu.cfg.GetNodeInfo(node).offline:
440
    raise errors.OpPrereqError("Can't use offline node %s" % node)
441

    
442

    
443
def _CheckNodeNotDrained(lu, node):
444
  """Ensure that a given node is not drained.
445

446
  @param lu: the LU on behalf of which we make the check
447
  @param node: the node to check
448
  @raise errors.OpPrereqError: if the node is drained
449

450
  """
451
  if lu.cfg.GetNodeInfo(node).drained:
452
    raise errors.OpPrereqError("Can't use drained node %s" % node)
453

    
454

    
455
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
456
                          memory, vcpus, nics, disk_template, disks):
457
  """Builds instance related env variables for hooks
458

459
  This builds the hook environment from individual variables.
460

461
  @type name: string
462
  @param name: the name of the instance
463
  @type primary_node: string
464
  @param primary_node: the name of the instance's primary node
465
  @type secondary_nodes: list
466
  @param secondary_nodes: list of secondary nodes as strings
467
  @type os_type: string
468
  @param os_type: the name of the instance's OS
469
  @type status: boolean
470
  @param status: the should_run status of the instance
471
  @type memory: string
472
  @param memory: the memory size of the instance
473
  @type vcpus: string
474
  @param vcpus: the count of VCPUs the instance has
475
  @type nics: list
476
  @param nics: list of tuples (ip, bridge, mac) representing
477
      the NICs the instance  has
478
  @type disk_template: string
479
  @param disk_template: the distk template of the instance
480
  @type disks: list
481
  @param disks: the list of (size, mode) pairs
482
  @rtype: dict
483
  @return: the hook environment for this instance
484

485
  """
486
  if status:
487
    str_status = "up"
488
  else:
489
    str_status = "down"
490
  env = {
491
    "OP_TARGET": name,
492
    "INSTANCE_NAME": name,
493
    "INSTANCE_PRIMARY": primary_node,
494
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
495
    "INSTANCE_OS_TYPE": os_type,
496
    "INSTANCE_STATUS": str_status,
497
    "INSTANCE_MEMORY": memory,
498
    "INSTANCE_VCPUS": vcpus,
499
    "INSTANCE_DISK_TEMPLATE": disk_template,
500
  }
501

    
502
  if nics:
503
    nic_count = len(nics)
504
    for idx, (ip, bridge, mac) in enumerate(nics):
505
      if ip is None:
506
        ip = ""
507
      env["INSTANCE_NIC%d_IP" % idx] = ip
508
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
509
      env["INSTANCE_NIC%d_MAC" % idx] = mac
510
  else:
511
    nic_count = 0
512

    
513
  env["INSTANCE_NIC_COUNT"] = nic_count
514

    
515
  if disks:
516
    disk_count = len(disks)
517
    for idx, (size, mode) in enumerate(disks):
518
      env["INSTANCE_DISK%d_SIZE" % idx] = size
519
      env["INSTANCE_DISK%d_MODE" % idx] = mode
520
  else:
521
    disk_count = 0
522

    
523
  env["INSTANCE_DISK_COUNT"] = disk_count
524

    
525
  return env
526

    
527

    
528
def _BuildInstanceHookEnvByObject(lu, instance, override=None):
529
  """Builds instance related env variables for hooks from an object.
530

531
  @type lu: L{LogicalUnit}
532
  @param lu: the logical unit on whose behalf we execute
533
  @type instance: L{objects.Instance}
534
  @param instance: the instance for which we should build the
535
      environment
536
  @type override: dict
537
  @param override: dictionary with key/values that will override
538
      our values
539
  @rtype: dict
540
  @return: the hook environment dictionary
541

542
  """
543
  bep = lu.cfg.GetClusterInfo().FillBE(instance)
544
  args = {
545
    'name': instance.name,
546
    'primary_node': instance.primary_node,
547
    'secondary_nodes': instance.secondary_nodes,
548
    'os_type': instance.os,
549
    'status': instance.admin_up,
550
    'memory': bep[constants.BE_MEMORY],
551
    'vcpus': bep[constants.BE_VCPUS],
552
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
553
    'disk_template': instance.disk_template,
554
    'disks': [(disk.size, disk.mode) for disk in instance.disks],
555
  }
556
  if override:
557
    args.update(override)
558
  return _BuildInstanceHookEnv(**args)
559

    
560

    
561
def _AdjustCandidatePool(lu):
562
  """Adjust the candidate pool after node operations.
563

564
  """
565
  mod_list = lu.cfg.MaintainCandidatePool()
566
  if mod_list:
567
    lu.LogInfo("Promoted nodes to master candidate role: %s",
568
               ", ".join(node.name for node in mod_list))
569
    for name in mod_list:
570
      lu.context.ReaddNode(name)
571
  mc_now, mc_max = lu.cfg.GetMasterCandidateStats()
572
  if mc_now > mc_max:
573
    lu.LogInfo("Note: more nodes are candidates (%d) than desired (%d)" %
574
               (mc_now, mc_max))
575

    
576

    
577
def _CheckInstanceBridgesExist(lu, instance):
578
  """Check that the brigdes needed by an instance exist.
579

580
  """
581
  # check bridges existance
582
  brlist = [nic.bridge for nic in instance.nics]
583
  result = lu.rpc.call_bridges_exist(instance.primary_node, brlist)
584
  result.Raise()
585
  if not result.data:
586
    raise errors.OpPrereqError("One or more target bridges %s does not"
587
                               " exist on destination node '%s'" %
588
                               (brlist, instance.primary_node))
589

    
590

    
591
class LUDestroyCluster(NoHooksLU):
592
  """Logical unit for destroying the cluster.
593

594
  """
595
  _OP_REQP = []
596

    
597
  def CheckPrereq(self):
598
    """Check prerequisites.
599

600
    This checks whether the cluster is empty.
601

602
    Any errors are signalled by raising errors.OpPrereqError.
603

604
    """
605
    master = self.cfg.GetMasterNode()
606

    
607
    nodelist = self.cfg.GetNodeList()
608
    if len(nodelist) != 1 or nodelist[0] != master:
609
      raise errors.OpPrereqError("There are still %d node(s) in"
610
                                 " this cluster." % (len(nodelist) - 1))
611
    instancelist = self.cfg.GetInstanceList()
612
    if instancelist:
613
      raise errors.OpPrereqError("There are still %d instance(s) in"
614
                                 " this cluster." % len(instancelist))
615

    
616
  def Exec(self, feedback_fn):
617
    """Destroys the cluster.
618

619
    """
620
    master = self.cfg.GetMasterNode()
621
    result = self.rpc.call_node_stop_master(master, False)
622
    result.Raise()
623
    if not result.data:
624
      raise errors.OpExecError("Could not disable the master role")
625
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
626
    utils.CreateBackup(priv_key)
627
    utils.CreateBackup(pub_key)
628
    return master
629

    
630

    
631
class LUVerifyCluster(LogicalUnit):
632
  """Verifies the cluster status.
633

634
  """
635
  HPATH = "cluster-verify"
636
  HTYPE = constants.HTYPE_CLUSTER
637
  _OP_REQP = ["skip_checks"]
638
  REQ_BGL = False
639

    
640
  def ExpandNames(self):
641
    self.needed_locks = {
642
      locking.LEVEL_NODE: locking.ALL_SET,
643
      locking.LEVEL_INSTANCE: locking.ALL_SET,
644
    }
645
    self.share_locks = dict(((i, 1) for i in locking.LEVELS))
646

    
647
  def _VerifyNode(self, nodeinfo, file_list, local_cksum,
648
                  node_result, feedback_fn, master_files,
649
                  drbd_map, vg_name):
650
    """Run multiple tests against a node.
651

652
    Test list:
653

654
      - compares ganeti version
655
      - checks vg existance and size > 20G
656
      - checks config file checksum
657
      - checks ssh to other nodes
658

659
    @type nodeinfo: L{objects.Node}
660
    @param nodeinfo: the node to check
661
    @param file_list: required list of files
662
    @param local_cksum: dictionary of local files and their checksums
663
    @param node_result: the results from the node
664
    @param feedback_fn: function used to accumulate results
665
    @param master_files: list of files that only masters should have
666
    @param drbd_map: the useddrbd minors for this node, in
667
        form of minor: (instance, must_exist) which correspond to instances
668
        and their running status
669
    @param vg_name: Ganeti Volume Group (result of self.cfg.GetVGName())
670

671
    """
672
    node = nodeinfo.name
673

    
674
    # main result, node_result should be a non-empty dict
675
    if not node_result or not isinstance(node_result, dict):
676
      feedback_fn("  - ERROR: unable to verify node %s." % (node,))
677
      return True
678

    
679
    # compares ganeti version
680
    local_version = constants.PROTOCOL_VERSION
681
    remote_version = node_result.get('version', None)
682
    if not (remote_version and isinstance(remote_version, (list, tuple)) and
683
            len(remote_version) == 2):
684
      feedback_fn("  - ERROR: connection to %s failed" % (node))
685
      return True
686

    
687
    if local_version != remote_version[0]:
688
      feedback_fn("  - ERROR: incompatible protocol versions: master %s,"
689
                  " node %s %s" % (local_version, node, remote_version[0]))
690
      return True
691

    
692
    # node seems compatible, we can actually try to look into its results
693

    
694
    bad = False
695

    
696
    # full package version
697
    if constants.RELEASE_VERSION != remote_version[1]:
698
      feedback_fn("  - WARNING: software version mismatch: master %s,"
699
                  " node %s %s" %
700
                  (constants.RELEASE_VERSION, node, remote_version[1]))
701

    
702
    # checks vg existence and size > 20G
703
    if vg_name is not None:
704
      vglist = node_result.get(constants.NV_VGLIST, None)
705
      if not vglist:
706
        feedback_fn("  - ERROR: unable to check volume groups on node %s." %
707
                        (node,))
708
        bad = True
709
      else:
710
        vgstatus = utils.CheckVolumeGroupSize(vglist, vg_name,
711
                                              constants.MIN_VG_SIZE)
712
        if vgstatus:
713
          feedback_fn("  - ERROR: %s on node %s" % (vgstatus, node))
714
          bad = True
715

    
716
    # checks config file checksum
717

    
718
    remote_cksum = node_result.get(constants.NV_FILELIST, None)
719
    if not isinstance(remote_cksum, dict):
720
      bad = True
721
      feedback_fn("  - ERROR: node hasn't returned file checksum data")
722
    else:
723
      for file_name in file_list:
724
        node_is_mc = nodeinfo.master_candidate
725
        must_have_file = file_name not in master_files
726
        if file_name not in remote_cksum:
727
          if node_is_mc or must_have_file:
728
            bad = True
729
            feedback_fn("  - ERROR: file '%s' missing" % file_name)
730
        elif remote_cksum[file_name] != local_cksum[file_name]:
731
          if node_is_mc or must_have_file:
732
            bad = True
733
            feedback_fn("  - ERROR: file '%s' has wrong checksum" % file_name)
734
          else:
735
            # not candidate and this is not a must-have file
736
            bad = True
737
            feedback_fn("  - ERROR: non master-candidate has old/wrong file"
738
                        " '%s'" % file_name)
739
        else:
740
          # all good, except non-master/non-must have combination
741
          if not node_is_mc and not must_have_file:
742
            feedback_fn("  - ERROR: file '%s' should not exist on non master"
743
                        " candidates" % file_name)
744

    
745
    # checks ssh to any
746

    
747
    if constants.NV_NODELIST not in node_result:
748
      bad = True
749
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
750
    else:
751
      if node_result[constants.NV_NODELIST]:
752
        bad = True
753
        for node in node_result[constants.NV_NODELIST]:
754
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
755
                          (node, node_result[constants.NV_NODELIST][node]))
756

    
757
    if constants.NV_NODENETTEST not in node_result:
758
      bad = True
759
      feedback_fn("  - ERROR: node hasn't returned node tcp connectivity data")
760
    else:
761
      if node_result[constants.NV_NODENETTEST]:
762
        bad = True
763
        nlist = utils.NiceSort(node_result[constants.NV_NODENETTEST].keys())
764
        for node in nlist:
765
          feedback_fn("  - ERROR: tcp communication with node '%s': %s" %
766
                          (node, node_result[constants.NV_NODENETTEST][node]))
767

    
768
    hyp_result = node_result.get(constants.NV_HYPERVISOR, None)
769
    if isinstance(hyp_result, dict):
770
      for hv_name, hv_result in hyp_result.iteritems():
771
        if hv_result is not None:
772
          feedback_fn("  - ERROR: hypervisor %s verify failure: '%s'" %
773
                      (hv_name, hv_result))
774

    
775
    # check used drbd list
776
    if vg_name is not None:
777
      used_minors = node_result.get(constants.NV_DRBDLIST, [])
778
      if not isinstance(used_minors, (tuple, list)):
779
        feedback_fn("  - ERROR: cannot parse drbd status file: %s" %
780
                    str(used_minors))
781
      else:
782
        for minor, (iname, must_exist) in drbd_map.items():
783
          if minor not in used_minors and must_exist:
784
            feedback_fn("  - ERROR: drbd minor %d of instance %s is"
785
                        " not active" % (minor, iname))
786
            bad = True
787
        for minor in used_minors:
788
          if minor not in drbd_map:
789
            feedback_fn("  - ERROR: unallocated drbd minor %d is in use" %
790
                        minor)
791
            bad = True
792

    
793
    return bad
794

    
795
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
796
                      node_instance, feedback_fn, n_offline):
797
    """Verify an instance.
798

799
    This function checks to see if the required block devices are
800
    available on the instance's node.
801

802
    """
803
    bad = False
804

    
805
    node_current = instanceconfig.primary_node
806

    
807
    node_vol_should = {}
808
    instanceconfig.MapLVsByNode(node_vol_should)
809

    
810
    for node in node_vol_should:
811
      if node in n_offline:
812
        # ignore missing volumes on offline nodes
813
        continue
814
      for volume in node_vol_should[node]:
815
        if node not in node_vol_is or volume not in node_vol_is[node]:
816
          feedback_fn("  - ERROR: volume %s missing on node %s" %
817
                          (volume, node))
818
          bad = True
819

    
820
    if instanceconfig.admin_up:
821
      if ((node_current not in node_instance or
822
          not instance in node_instance[node_current]) and
823
          node_current not in n_offline):
824
        feedback_fn("  - ERROR: instance %s not running on node %s" %
825
                        (instance, node_current))
826
        bad = True
827

    
828
    for node in node_instance:
829
      if (not node == node_current):
830
        if instance in node_instance[node]:
831
          feedback_fn("  - ERROR: instance %s should not run on node %s" %
832
                          (instance, node))
833
          bad = True
834

    
835
    return bad
836

    
837
  def _VerifyOrphanVolumes(self, node_vol_should, node_vol_is, feedback_fn):
838
    """Verify if there are any unknown volumes in the cluster.
839

840
    The .os, .swap and backup volumes are ignored. All other volumes are
841
    reported as unknown.
842

843
    """
844
    bad = False
845

    
846
    for node in node_vol_is:
847
      for volume in node_vol_is[node]:
848
        if node not in node_vol_should or volume not in node_vol_should[node]:
849
          feedback_fn("  - ERROR: volume %s on node %s should not exist" %
850
                      (volume, node))
851
          bad = True
852
    return bad
853

    
854
  def _VerifyOrphanInstances(self, instancelist, node_instance, feedback_fn):
855
    """Verify the list of running instances.
856

857
    This checks what instances are running but unknown to the cluster.
858

859
    """
860
    bad = False
861
    for node in node_instance:
862
      for runninginstance in node_instance[node]:
863
        if runninginstance not in instancelist:
864
          feedback_fn("  - ERROR: instance %s on node %s should not exist" %
865
                          (runninginstance, node))
866
          bad = True
867
    return bad
868

    
869
  def _VerifyNPlusOneMemory(self, node_info, instance_cfg, feedback_fn):
870
    """Verify N+1 Memory Resilience.
871

872
    Check that if one single node dies we can still start all the instances it
873
    was primary for.
874

875
    """
876
    bad = False
877

    
878
    for node, nodeinfo in node_info.iteritems():
879
      # This code checks that every node which is now listed as secondary has
880
      # enough memory to host all instances it is supposed to should a single
881
      # other node in the cluster fail.
882
      # FIXME: not ready for failover to an arbitrary node
883
      # FIXME: does not support file-backed instances
884
      # WARNING: we currently take into account down instances as well as up
885
      # ones, considering that even if they're down someone might want to start
886
      # them even in the event of a node failure.
887
      for prinode, instances in nodeinfo['sinst-by-pnode'].iteritems():
888
        needed_mem = 0
889
        for instance in instances:
890
          bep = self.cfg.GetClusterInfo().FillBE(instance_cfg[instance])
891
          if bep[constants.BE_AUTO_BALANCE]:
892
            needed_mem += bep[constants.BE_MEMORY]
893
        if nodeinfo['mfree'] < needed_mem:
894
          feedback_fn("  - ERROR: not enough memory on node %s to accomodate"
895
                      " failovers should node %s fail" % (node, prinode))
896
          bad = True
897
    return bad
898

    
899
  def CheckPrereq(self):
900
    """Check prerequisites.
901

902
    Transform the list of checks we're going to skip into a set and check that
903
    all its members are valid.
904

905
    """
906
    self.skip_set = frozenset(self.op.skip_checks)
907
    if not constants.VERIFY_OPTIONAL_CHECKS.issuperset(self.skip_set):
908
      raise errors.OpPrereqError("Invalid checks to be skipped specified")
909

    
910
  def BuildHooksEnv(self):
911
    """Build hooks env.
912

913
    Cluster-Verify hooks just rone in the post phase and their failure makes
914
    the output be logged in the verify output and the verification to fail.
915

916
    """
917
    all_nodes = self.cfg.GetNodeList()
918
    env = {
919
      "CLUSTER_TAGS": " ".join(self.cfg.GetClusterInfo().GetTags())
920
      }
921
    for node in self.cfg.GetAllNodesInfo().values():
922
      env["NODE_TAGS_%s" % node.name] = " ".join(node.GetTags())
923

    
924
    return env, [], all_nodes
925

    
926
  def Exec(self, feedback_fn):
927
    """Verify integrity of cluster, performing various test on nodes.
928

929
    """
930
    bad = False
931
    feedback_fn("* Verifying global settings")
932
    for msg in self.cfg.VerifyConfig():
933
      feedback_fn("  - ERROR: %s" % msg)
934

    
935
    vg_name = self.cfg.GetVGName()
936
    hypervisors = self.cfg.GetClusterInfo().enabled_hypervisors
937
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
938
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
939
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
940
    instanceinfo = dict((iname, self.cfg.GetInstanceInfo(iname))
941
                        for iname in instancelist)
942
    i_non_redundant = [] # Non redundant instances
943
    i_non_a_balanced = [] # Non auto-balanced instances
944
    n_offline = [] # List of offline nodes
945
    n_drained = [] # List of nodes being drained
946
    node_volume = {}
947
    node_instance = {}
948
    node_info = {}
949
    instance_cfg = {}
950

    
951
    # FIXME: verify OS list
952
    # do local checksums
953
    master_files = [constants.CLUSTER_CONF_FILE]
954

    
955
    file_names = ssconf.SimpleStore().GetFileList()
956
    file_names.append(constants.SSL_CERT_FILE)
957
    file_names.append(constants.RAPI_CERT_FILE)
958
    file_names.extend(master_files)
959

    
960
    local_checksums = utils.FingerprintFiles(file_names)
961

    
962
    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
963
    node_verify_param = {
964
      constants.NV_FILELIST: file_names,
965
      constants.NV_NODELIST: [node.name for node in nodeinfo
966
                              if not node.offline],
967
      constants.NV_HYPERVISOR: hypervisors,
968
      constants.NV_NODENETTEST: [(node.name, node.primary_ip,
969
                                  node.secondary_ip) for node in nodeinfo
970
                                 if not node.offline],
971
      constants.NV_INSTANCELIST: hypervisors,
972
      constants.NV_VERSION: None,
973
      constants.NV_HVINFO: self.cfg.GetHypervisorType(),
974
      }
975
    if vg_name is not None:
976
      node_verify_param[constants.NV_VGLIST] = None
977
      node_verify_param[constants.NV_LVLIST] = vg_name
978
      node_verify_param[constants.NV_DRBDLIST] = None
979
    all_nvinfo = self.rpc.call_node_verify(nodelist, node_verify_param,
980
                                           self.cfg.GetClusterName())
981

    
982
    cluster = self.cfg.GetClusterInfo()
983
    master_node = self.cfg.GetMasterNode()
984
    all_drbd_map = self.cfg.ComputeDRBDMap()
985

    
986
    for node_i in nodeinfo:
987
      node = node_i.name
988
      nresult = all_nvinfo[node].data
989

    
990
      if node_i.offline:
991
        feedback_fn("* Skipping offline node %s" % (node,))
992
        n_offline.append(node)
993
        continue
994

    
995
      if node == master_node:
996
        ntype = "master"
997
      elif node_i.master_candidate:
998
        ntype = "master candidate"
999
      elif node_i.drained:
1000
        ntype = "drained"
1001
        n_drained.append(node)
1002
      else:
1003
        ntype = "regular"
1004
      feedback_fn("* Verifying node %s (%s)" % (node, ntype))
1005

    
1006
      if all_nvinfo[node].failed or not isinstance(nresult, dict):
1007
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
1008
        bad = True
1009
        continue
1010

    
1011
      node_drbd = {}
1012
      for minor, instance in all_drbd_map[node].items():
1013
        if instance not in instanceinfo:
1014
          feedback_fn("  - ERROR: ghost instance '%s' in temporary DRBD map" %
1015
                      instance)
1016
          # ghost instance should not be running, but otherwise we
1017
          # don't give double warnings (both ghost instance and
1018
          # unallocated minor in use)
1019
          node_drbd[minor] = (instance, False)
1020
        else:
1021
          instance = instanceinfo[instance]
1022
          node_drbd[minor] = (instance.name, instance.admin_up)
1023
      result = self._VerifyNode(node_i, file_names, local_checksums,
1024
                                nresult, feedback_fn, master_files,
1025
                                node_drbd, vg_name)
1026
      bad = bad or result
1027

    
1028
      lvdata = nresult.get(constants.NV_LVLIST, "Missing LV data")
1029
      if vg_name is None:
1030
        node_volume[node] = {}
1031
      elif isinstance(lvdata, basestring):
1032
        feedback_fn("  - ERROR: LVM problem on node %s: %s" %
1033
                    (node, utils.SafeEncode(lvdata)))
1034
        bad = True
1035
        node_volume[node] = {}
1036
      elif not isinstance(lvdata, dict):
1037
        feedback_fn("  - ERROR: connection to %s failed (lvlist)" % (node,))
1038
        bad = True
1039
        continue
1040
      else:
1041
        node_volume[node] = lvdata
1042

    
1043
      # node_instance
1044
      idata = nresult.get(constants.NV_INSTANCELIST, None)
1045
      if not isinstance(idata, list):
1046
        feedback_fn("  - ERROR: connection to %s failed (instancelist)" %
1047
                    (node,))
1048
        bad = True
1049
        continue
1050

    
1051
      node_instance[node] = idata
1052

    
1053
      # node_info
1054
      nodeinfo = nresult.get(constants.NV_HVINFO, None)
1055
      if not isinstance(nodeinfo, dict):
1056
        feedback_fn("  - ERROR: connection to %s failed (hvinfo)" % (node,))
1057
        bad = True
1058
        continue
1059

    
1060
      try:
1061
        node_info[node] = {
1062
          "mfree": int(nodeinfo['memory_free']),
1063
          "pinst": [],
1064
          "sinst": [],
1065
          # dictionary holding all instances this node is secondary for,
1066
          # grouped by their primary node. Each key is a cluster node, and each
1067
          # value is a list of instances which have the key as primary and the
1068
          # current node as secondary.  this is handy to calculate N+1 memory
1069
          # availability if you can only failover from a primary to its
1070
          # secondary.
1071
          "sinst-by-pnode": {},
1072
        }
1073
        # FIXME: devise a free space model for file based instances as well
1074
        if vg_name is not None:
1075
          if (constants.NV_VGLIST not in nresult or
1076
              vg_name not in nresult[constants.NV_VGLIST]):
1077
            feedback_fn("  - ERROR: node %s didn't return data for the"
1078
                        " volume group '%s' - it is either missing or broken" %
1079
                        (node, vg_name))
1080
            bad = True
1081
            continue
1082
          node_info[node]["dfree"] = int(nresult[constants.NV_VGLIST][vg_name])
1083
      except (ValueError, KeyError):
1084
        feedback_fn("  - ERROR: invalid nodeinfo value returned"
1085
                    " from node %s" % (node,))
1086
        bad = True
1087
        continue
1088

    
1089
    node_vol_should = {}
1090

    
1091
    for instance in instancelist:
1092
      feedback_fn("* Verifying instance %s" % instance)
1093
      inst_config = instanceinfo[instance]
1094
      result =  self._VerifyInstance(instance, inst_config, node_volume,
1095
                                     node_instance, feedback_fn, n_offline)
1096
      bad = bad or result
1097
      inst_nodes_offline = []
1098

    
1099
      inst_config.MapLVsByNode(node_vol_should)
1100

    
1101
      instance_cfg[instance] = inst_config
1102

    
1103
      pnode = inst_config.primary_node
1104
      if pnode in node_info:
1105
        node_info[pnode]['pinst'].append(instance)
1106
      elif pnode not in n_offline:
1107
        feedback_fn("  - ERROR: instance %s, connection to primary node"
1108
                    " %s failed" % (instance, pnode))
1109
        bad = True
1110

    
1111
      if pnode in n_offline:
1112
        inst_nodes_offline.append(pnode)
1113

    
1114
      # If the instance is non-redundant we cannot survive losing its primary
1115
      # node, so we are not N+1 compliant. On the other hand we have no disk
1116
      # templates with more than one secondary so that situation is not well
1117
      # supported either.
1118
      # FIXME: does not support file-backed instances
1119
      if len(inst_config.secondary_nodes) == 0:
1120
        i_non_redundant.append(instance)
1121
      elif len(inst_config.secondary_nodes) > 1:
1122
        feedback_fn("  - WARNING: multiple secondaries for instance %s"
1123
                    % instance)
1124

    
1125
      if not cluster.FillBE(inst_config)[constants.BE_AUTO_BALANCE]:
1126
        i_non_a_balanced.append(instance)
1127

    
1128
      for snode in inst_config.secondary_nodes:
1129
        if snode in node_info:
1130
          node_info[snode]['sinst'].append(instance)
1131
          if pnode not in node_info[snode]['sinst-by-pnode']:
1132
            node_info[snode]['sinst-by-pnode'][pnode] = []
1133
          node_info[snode]['sinst-by-pnode'][pnode].append(instance)
1134
        elif snode not in n_offline:
1135
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
1136
                      " %s failed" % (instance, snode))
1137
          bad = True
1138
        if snode in n_offline:
1139
          inst_nodes_offline.append(snode)
1140

    
1141
      if inst_nodes_offline:
1142
        # warn that the instance lives on offline nodes, and set bad=True
1143
        feedback_fn("  - ERROR: instance lives on offline node(s) %s" %
1144
                    ", ".join(inst_nodes_offline))
1145
        bad = True
1146

    
1147
    feedback_fn("* Verifying orphan volumes")
1148
    result = self._VerifyOrphanVolumes(node_vol_should, node_volume,
1149
                                       feedback_fn)
1150
    bad = bad or result
1151

    
1152
    feedback_fn("* Verifying remaining instances")
1153
    result = self._VerifyOrphanInstances(instancelist, node_instance,
1154
                                         feedback_fn)
1155
    bad = bad or result
1156

    
1157
    if constants.VERIFY_NPLUSONE_MEM not in self.skip_set:
1158
      feedback_fn("* Verifying N+1 Memory redundancy")
1159
      result = self._VerifyNPlusOneMemory(node_info, instance_cfg, feedback_fn)
1160
      bad = bad or result
1161

    
1162
    feedback_fn("* Other Notes")
1163
    if i_non_redundant:
1164
      feedback_fn("  - NOTICE: %d non-redundant instance(s) found."
1165
                  % len(i_non_redundant))
1166

    
1167
    if i_non_a_balanced:
1168
      feedback_fn("  - NOTICE: %d non-auto-balanced instance(s) found."
1169
                  % len(i_non_a_balanced))
1170

    
1171
    if n_offline:
1172
      feedback_fn("  - NOTICE: %d offline node(s) found." % len(n_offline))
1173

    
1174
    if n_drained:
1175
      feedback_fn("  - NOTICE: %d drained node(s) found." % len(n_drained))
1176

    
1177
    return not bad
1178

    
1179
  def HooksCallBack(self, phase, hooks_results, feedback_fn, lu_result):
1180
    """Analize the post-hooks' result
1181

1182
    This method analyses the hook result, handles it, and sends some
1183
    nicely-formatted feedback back to the user.
1184

1185
    @param phase: one of L{constants.HOOKS_PHASE_POST} or
1186
        L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
1187
    @param hooks_results: the results of the multi-node hooks rpc call
1188
    @param feedback_fn: function used send feedback back to the caller
1189
    @param lu_result: previous Exec result
1190
    @return: the new Exec result, based on the previous result
1191
        and hook results
1192

1193
    """
1194
    # We only really run POST phase hooks, and are only interested in
1195
    # their results
1196
    if phase == constants.HOOKS_PHASE_POST:
1197
      # Used to change hooks' output to proper indentation
1198
      indent_re = re.compile('^', re.M)
1199
      feedback_fn("* Hooks Results")
1200
      if not hooks_results:
1201
        feedback_fn("  - ERROR: general communication failure")
1202
        lu_result = 1
1203
      else:
1204
        for node_name in hooks_results:
1205
          show_node_header = True
1206
          res = hooks_results[node_name]
1207
          if res.failed or res.data is False or not isinstance(res.data, list):
1208
            if res.offline:
1209
              # no need to warn or set fail return value
1210
              continue
1211
            feedback_fn("    Communication failure in hooks execution")
1212
            lu_result = 1
1213
            continue
1214
          for script, hkr, output in res.data:
1215
            if hkr == constants.HKR_FAIL:
1216
              # The node header is only shown once, if there are
1217
              # failing hooks on that node
1218
              if show_node_header:
1219
                feedback_fn("  Node %s:" % node_name)
1220
                show_node_header = False
1221
              feedback_fn("    ERROR: Script %s failed, output:" % script)
1222
              output = indent_re.sub('      ', output)
1223
              feedback_fn("%s" % output)
1224
              lu_result = 1
1225

    
1226
      return lu_result
1227

    
1228

    
1229
class LUVerifyDisks(NoHooksLU):
1230
  """Verifies the cluster disks status.
1231

1232
  """
1233
  _OP_REQP = []
1234
  REQ_BGL = False
1235

    
1236
  def ExpandNames(self):
1237
    self.needed_locks = {
1238
      locking.LEVEL_NODE: locking.ALL_SET,
1239
      locking.LEVEL_INSTANCE: locking.ALL_SET,
1240
    }
1241
    self.share_locks = dict(((i, 1) for i in locking.LEVELS))
1242

    
1243
  def CheckPrereq(self):
1244
    """Check prerequisites.
1245

1246
    This has no prerequisites.
1247

1248
    """
1249
    pass
1250

    
1251
  def Exec(self, feedback_fn):
1252
    """Verify integrity of cluster disks.
1253

1254
    """
1255
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
1256

    
1257
    vg_name = self.cfg.GetVGName()
1258
    nodes = utils.NiceSort(self.cfg.GetNodeList())
1259
    instances = [self.cfg.GetInstanceInfo(name)
1260
                 for name in self.cfg.GetInstanceList()]
1261

    
1262
    nv_dict = {}
1263
    for inst in instances:
1264
      inst_lvs = {}
1265
      if (not inst.admin_up or
1266
          inst.disk_template not in constants.DTS_NET_MIRROR):
1267
        continue
1268
      inst.MapLVsByNode(inst_lvs)
1269
      # transform { iname: {node: [vol,],},} to {(node, vol): iname}
1270
      for node, vol_list in inst_lvs.iteritems():
1271
        for vol in vol_list:
1272
          nv_dict[(node, vol)] = inst
1273

    
1274
    if not nv_dict:
1275
      return result
1276

    
1277
    node_lvs = self.rpc.call_volume_list(nodes, vg_name)
1278

    
1279
    to_act = set()
1280
    for node in nodes:
1281
      # node_volume
1282
      lvs = node_lvs[node]
1283
      if lvs.failed:
1284
        if not lvs.offline:
1285
          self.LogWarning("Connection to node %s failed: %s" %
1286
                          (node, lvs.data))
1287
        continue
1288
      lvs = lvs.data
1289
      if isinstance(lvs, basestring):
1290
        logging.warning("Error enumerating LVs on node %s: %s", node, lvs)
1291
        res_nlvm[node] = lvs
1292
        continue
1293
      elif not isinstance(lvs, dict):
1294
        logging.warning("Connection to node %s failed or invalid data"
1295
                        " returned", node)
1296
        res_nodes.append(node)
1297
        continue
1298

    
1299
      for lv_name, (_, lv_inactive, lv_online) in lvs.iteritems():
1300
        inst = nv_dict.pop((node, lv_name), None)
1301
        if (not lv_online and inst is not None
1302
            and inst.name not in res_instances):
1303
          res_instances.append(inst.name)
1304

    
1305
    # any leftover items in nv_dict are missing LVs, let's arrange the
1306
    # data better
1307
    for key, inst in nv_dict.iteritems():
1308
      if inst.name not in res_missing:
1309
        res_missing[inst.name] = []
1310
      res_missing[inst.name].append(key)
1311

    
1312
    return result
1313

    
1314

    
1315
class LURenameCluster(LogicalUnit):
1316
  """Rename the cluster.
1317

1318
  """
1319
  HPATH = "cluster-rename"
1320
  HTYPE = constants.HTYPE_CLUSTER
1321
  _OP_REQP = ["name"]
1322

    
1323
  def BuildHooksEnv(self):
1324
    """Build hooks env.
1325

1326
    """
1327
    env = {
1328
      "OP_TARGET": self.cfg.GetClusterName(),
1329
      "NEW_NAME": self.op.name,
1330
      }
1331
    mn = self.cfg.GetMasterNode()
1332
    return env, [mn], [mn]
1333

    
1334
  def CheckPrereq(self):
1335
    """Verify that the passed name is a valid one.
1336

1337
    """
1338
    hostname = utils.HostInfo(self.op.name)
1339

    
1340
    new_name = hostname.name
1341
    self.ip = new_ip = hostname.ip
1342
    old_name = self.cfg.GetClusterName()
1343
    old_ip = self.cfg.GetMasterIP()
1344
    if new_name == old_name and new_ip == old_ip:
1345
      raise errors.OpPrereqError("Neither the name nor the IP address of the"
1346
                                 " cluster has changed")
1347
    if new_ip != old_ip:
1348
      if utils.TcpPing(new_ip, constants.DEFAULT_NODED_PORT):
1349
        raise errors.OpPrereqError("The given cluster IP address (%s) is"
1350
                                   " reachable on the network. Aborting." %
1351
                                   new_ip)
1352

    
1353
    self.op.name = new_name
1354

    
1355
  def Exec(self, feedback_fn):
1356
    """Rename the cluster.
1357

1358
    """
1359
    clustername = self.op.name
1360
    ip = self.ip
1361

    
1362
    # shutdown the master IP
1363
    master = self.cfg.GetMasterNode()
1364
    result = self.rpc.call_node_stop_master(master, False)
1365
    if result.failed or not result.data:
1366
      raise errors.OpExecError("Could not disable the master role")
1367

    
1368
    try:
1369
      cluster = self.cfg.GetClusterInfo()
1370
      cluster.cluster_name = clustername
1371
      cluster.master_ip = ip
1372
      self.cfg.Update(cluster)
1373

    
1374
      # update the known hosts file
1375
      ssh.WriteKnownHostsFile(self.cfg, constants.SSH_KNOWN_HOSTS_FILE)
1376
      node_list = self.cfg.GetNodeList()
1377
      try:
1378
        node_list.remove(master)
1379
      except ValueError:
1380
        pass
1381
      result = self.rpc.call_upload_file(node_list,
1382
                                         constants.SSH_KNOWN_HOSTS_FILE)
1383
      for to_node, to_result in result.iteritems():
1384
         msg = to_result.RemoteFailMsg()
1385
         if msg:
1386
           msg = ("Copy of file %s to node %s failed: %s" %
1387
                   (constants.SSH_KNOWN_HOSTS_FILE, to_node, msg))
1388
           self.proc.LogWarning(msg)
1389

    
1390
    finally:
1391
      result = self.rpc.call_node_start_master(master, False)
1392
      if result.failed or not result.data:
1393
        self.LogWarning("Could not re-enable the master role on"
1394
                        " the master, please restart manually.")
1395

    
1396

    
1397
def _RecursiveCheckIfLVMBased(disk):
1398
  """Check if the given disk or its children are lvm-based.
1399

1400
  @type disk: L{objects.Disk}
1401
  @param disk: the disk to check
1402
  @rtype: booleean
1403
  @return: boolean indicating whether a LD_LV dev_type was found or not
1404

1405
  """
1406
  if disk.children:
1407
    for chdisk in disk.children:
1408
      if _RecursiveCheckIfLVMBased(chdisk):
1409
        return True
1410
  return disk.dev_type == constants.LD_LV
1411

    
1412

    
1413
class LUSetClusterParams(LogicalUnit):
1414
  """Change the parameters of the cluster.
1415

1416
  """
1417
  HPATH = "cluster-modify"
1418
  HTYPE = constants.HTYPE_CLUSTER
1419
  _OP_REQP = []
1420
  REQ_BGL = False
1421

    
1422
  def CheckArguments(self):
1423
    """Check parameters
1424

1425
    """
1426
    if not hasattr(self.op, "candidate_pool_size"):
1427
      self.op.candidate_pool_size = None
1428
    if self.op.candidate_pool_size is not None:
1429
      try:
1430
        self.op.candidate_pool_size = int(self.op.candidate_pool_size)
1431
      except (ValueError, TypeError), err:
1432
        raise errors.OpPrereqError("Invalid candidate_pool_size value: %s" %
1433
                                   str(err))
1434
      if self.op.candidate_pool_size < 1:
1435
        raise errors.OpPrereqError("At least one master candidate needed")
1436

    
1437
  def ExpandNames(self):
1438
    # FIXME: in the future maybe other cluster params won't require checking on
1439
    # all nodes to be modified.
1440
    self.needed_locks = {
1441
      locking.LEVEL_NODE: locking.ALL_SET,
1442
    }
1443
    self.share_locks[locking.LEVEL_NODE] = 1
1444

    
1445
  def BuildHooksEnv(self):
1446
    """Build hooks env.
1447

1448
    """
1449
    env = {
1450
      "OP_TARGET": self.cfg.GetClusterName(),
1451
      "NEW_VG_NAME": self.op.vg_name,
1452
      }
1453
    mn = self.cfg.GetMasterNode()
1454
    return env, [mn], [mn]
1455

    
1456
  def CheckPrereq(self):
1457
    """Check prerequisites.
1458

1459
    This checks whether the given params don't conflict and
1460
    if the given volume group is valid.
1461

1462
    """
1463
    if self.op.vg_name is not None and not self.op.vg_name:
1464
      instances = self.cfg.GetAllInstancesInfo().values()
1465
      for inst in instances:
1466
        for disk in inst.disks:
1467
          if _RecursiveCheckIfLVMBased(disk):
1468
            raise errors.OpPrereqError("Cannot disable lvm storage while"
1469
                                       " lvm-based instances exist")
1470

    
1471
    node_list = self.acquired_locks[locking.LEVEL_NODE]
1472

    
1473
    # if vg_name not None, checks given volume group on all nodes
1474
    if self.op.vg_name:
1475
      vglist = self.rpc.call_vg_list(node_list)
1476
      for node in node_list:
1477
        if vglist[node].failed:
1478
          # ignoring down node
1479
          self.LogWarning("Node %s unreachable/error, ignoring" % node)
1480
          continue
1481
        vgstatus = utils.CheckVolumeGroupSize(vglist[node].data,
1482
                                              self.op.vg_name,
1483
                                              constants.MIN_VG_SIZE)
1484
        if vgstatus:
1485
          raise errors.OpPrereqError("Error on node '%s': %s" %
1486
                                     (node, vgstatus))
1487

    
1488
    self.cluster = cluster = self.cfg.GetClusterInfo()
1489
    # validate beparams changes
1490
    if self.op.beparams:
1491
      utils.ForceDictType(self.op.beparams, constants.BES_PARAMETER_TYPES)
1492
      self.new_beparams = cluster.FillDict(
1493
        cluster.beparams[constants.BEGR_DEFAULT], self.op.beparams)
1494

    
1495
    # hypervisor list/parameters
1496
    self.new_hvparams = cluster.FillDict(cluster.hvparams, {})
1497
    if self.op.hvparams:
1498
      if not isinstance(self.op.hvparams, dict):
1499
        raise errors.OpPrereqError("Invalid 'hvparams' parameter on input")
1500
      for hv_name, hv_dict in self.op.hvparams.items():
1501
        if hv_name not in self.new_hvparams:
1502
          self.new_hvparams[hv_name] = hv_dict
1503
        else:
1504
          self.new_hvparams[hv_name].update(hv_dict)
1505

    
1506
    if self.op.enabled_hypervisors is not None:
1507
      self.hv_list = self.op.enabled_hypervisors
1508
    else:
1509
      self.hv_list = cluster.enabled_hypervisors
1510

    
1511
    if self.op.hvparams or self.op.enabled_hypervisors is not None:
1512
      # either the enabled list has changed, or the parameters have, validate
1513
      for hv_name, hv_params in self.new_hvparams.items():
1514
        if ((self.op.hvparams and hv_name in self.op.hvparams) or
1515
            (self.op.enabled_hypervisors and
1516
             hv_name in self.op.enabled_hypervisors)):
1517
          # either this is a new hypervisor, or its parameters have changed
1518
          hv_class = hypervisor.GetHypervisor(hv_name)
1519
          utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
1520
          hv_class.CheckParameterSyntax(hv_params)
1521
          _CheckHVParams(self, node_list, hv_name, hv_params)
1522

    
1523
  def Exec(self, feedback_fn):
1524
    """Change the parameters of the cluster.
1525

1526
    """
1527
    if self.op.vg_name is not None:
1528
      new_volume = self.op.vg_name
1529
      if not new_volume:
1530
        new_volume = None
1531
      if new_volume != self.cfg.GetVGName():
1532
        self.cfg.SetVGName(new_volume)
1533
      else:
1534
        feedback_fn("Cluster LVM configuration already in desired"
1535
                    " state, not changing")
1536
    if self.op.hvparams:
1537
      self.cluster.hvparams = self.new_hvparams
1538
    if self.op.enabled_hypervisors is not None:
1539
      self.cluster.enabled_hypervisors = self.op.enabled_hypervisors
1540
    if self.op.beparams:
1541
      self.cluster.beparams[constants.BEGR_DEFAULT] = self.new_beparams
1542
    if self.op.candidate_pool_size is not None:
1543
      self.cluster.candidate_pool_size = self.op.candidate_pool_size
1544

    
1545
    self.cfg.Update(self.cluster)
1546

    
1547
    # we want to update nodes after the cluster so that if any errors
1548
    # happen, we have recorded and saved the cluster info
1549
    if self.op.candidate_pool_size is not None:
1550
      _AdjustCandidatePool(self)
1551

    
1552

    
1553
def _RedistributeAncillaryFiles(lu, additional_nodes=None):
1554
  """Distribute additional files which are part of the cluster configuration.
1555

1556
  ConfigWriter takes care of distributing the config and ssconf files, but
1557
  there are more files which should be distributed to all nodes. This function
1558
  makes sure those are copied.
1559

1560
  @param lu: calling logical unit
1561
  @param additional_nodes: list of nodes not in the config to distribute to
1562

1563
  """
1564
  # 1. Gather target nodes
1565
  myself = lu.cfg.GetNodeInfo(lu.cfg.GetMasterNode())
1566
  dist_nodes = lu.cfg.GetNodeList()
1567
  if additional_nodes is not None:
1568
    dist_nodes.extend(additional_nodes)
1569
  if myself.name in dist_nodes:
1570
    dist_nodes.remove(myself.name)
1571
  # 2. Gather files to distribute
1572
  dist_files = set([constants.ETC_HOSTS,
1573
                    constants.SSH_KNOWN_HOSTS_FILE,
1574
                    constants.RAPI_CERT_FILE,
1575
                    constants.RAPI_USERS_FILE,
1576
                   ])
1577

    
1578
  enabled_hypervisors = lu.cfg.GetClusterInfo().enabled_hypervisors
1579
  for hv_name in enabled_hypervisors:
1580
    hv_class = hypervisor.GetHypervisor(hv_name)
1581
    dist_files.update(hv_class.GetAncillaryFiles())
1582

    
1583
  # 3. Perform the files upload
1584
  for fname in dist_files:
1585
    if os.path.exists(fname):
1586
      result = lu.rpc.call_upload_file(dist_nodes, fname)
1587
      for to_node, to_result in result.items():
1588
         msg = to_result.RemoteFailMsg()
1589
         if msg:
1590
           msg = ("Copy of file %s to node %s failed: %s" %
1591
                   (fname, to_node, msg))
1592
           lu.proc.LogWarning(msg)
1593

    
1594

    
1595
class LURedistributeConfig(NoHooksLU):
1596
  """Force the redistribution of cluster configuration.
1597

1598
  This is a very simple LU.
1599

1600
  """
1601
  _OP_REQP = []
1602
  REQ_BGL = False
1603

    
1604
  def ExpandNames(self):
1605
    self.needed_locks = {
1606
      locking.LEVEL_NODE: locking.ALL_SET,
1607
    }
1608
    self.share_locks[locking.LEVEL_NODE] = 1
1609

    
1610
  def CheckPrereq(self):
1611
    """Check prerequisites.
1612

1613
    """
1614

    
1615
  def Exec(self, feedback_fn):
1616
    """Redistribute the configuration.
1617

1618
    """
1619
    self.cfg.Update(self.cfg.GetClusterInfo())
1620
    _RedistributeAncillaryFiles(self)
1621

    
1622

    
1623
def _WaitForSync(lu, instance, oneshot=False, unlock=False):
1624
  """Sleep and poll for an instance's disk to sync.
1625

1626
  """
1627
  if not instance.disks:
1628
    return True
1629

    
1630
  if not oneshot:
1631
    lu.proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
1632

    
1633
  node = instance.primary_node
1634

    
1635
  for dev in instance.disks:
1636
    lu.cfg.SetDiskID(dev, node)
1637

    
1638
  retries = 0
1639
  while True:
1640
    max_time = 0
1641
    done = True
1642
    cumul_degraded = False
1643
    rstats = lu.rpc.call_blockdev_getmirrorstatus(node, instance.disks)
1644
    if rstats.failed or not rstats.data:
1645
      lu.LogWarning("Can't get any data from node %s", node)
1646
      retries += 1
1647
      if retries >= 10:
1648
        raise errors.RemoteError("Can't contact node %s for mirror data,"
1649
                                 " aborting." % node)
1650
      time.sleep(6)
1651
      continue
1652
    rstats = rstats.data
1653
    retries = 0
1654
    for i, mstat in enumerate(rstats):
1655
      if mstat is None:
1656
        lu.LogWarning("Can't compute data for node %s/%s",
1657
                           node, instance.disks[i].iv_name)
1658
        continue
1659
      # we ignore the ldisk parameter
1660
      perc_done, est_time, is_degraded, _ = mstat
1661
      cumul_degraded = cumul_degraded or (is_degraded and perc_done is None)
1662
      if perc_done is not None:
1663
        done = False
1664
        if est_time is not None:
1665
          rem_time = "%d estimated seconds remaining" % est_time
1666
          max_time = est_time
1667
        else:
1668
          rem_time = "no time estimate"
1669
        lu.proc.LogInfo("- device %s: %5.2f%% done, %s" %
1670
                        (instance.disks[i].iv_name, perc_done, rem_time))
1671
    if done or oneshot:
1672
      break
1673

    
1674
    time.sleep(min(60, max_time))
1675

    
1676
  if done:
1677
    lu.proc.LogInfo("Instance %s's disks are in sync." % instance.name)
1678
  return not cumul_degraded
1679

    
1680

    
1681
def _CheckDiskConsistency(lu, dev, node, on_primary, ldisk=False):
1682
  """Check that mirrors are not degraded.
1683

1684
  The ldisk parameter, if True, will change the test from the
1685
  is_degraded attribute (which represents overall non-ok status for
1686
  the device(s)) to the ldisk (representing the local storage status).
1687

1688
  """
1689
  lu.cfg.SetDiskID(dev, node)
1690
  if ldisk:
1691
    idx = 6
1692
  else:
1693
    idx = 5
1694

    
1695
  result = True
1696
  if on_primary or dev.AssembleOnSecondary():
1697
    rstats = lu.rpc.call_blockdev_find(node, dev)
1698
    msg = rstats.RemoteFailMsg()
1699
    if msg:
1700
      lu.LogWarning("Can't find disk on node %s: %s", node, msg)
1701
      result = False
1702
    elif not rstats.payload:
1703
      lu.LogWarning("Can't find disk on node %s", node)
1704
      result = False
1705
    else:
1706
      result = result and (not rstats.payload[idx])
1707
  if dev.children:
1708
    for child in dev.children:
1709
      result = result and _CheckDiskConsistency(lu, child, node, on_primary)
1710

    
1711
  return result
1712

    
1713

    
1714
class LUDiagnoseOS(NoHooksLU):
1715
  """Logical unit for OS diagnose/query.
1716

1717
  """
1718
  _OP_REQP = ["output_fields", "names"]
1719
  REQ_BGL = False
1720
  _FIELDS_STATIC = utils.FieldSet()
1721
  _FIELDS_DYNAMIC = utils.FieldSet("name", "valid", "node_status")
1722

    
1723
  def ExpandNames(self):
1724
    if self.op.names:
1725
      raise errors.OpPrereqError("Selective OS query not supported")
1726

    
1727
    _CheckOutputFields(static=self._FIELDS_STATIC,
1728
                       dynamic=self._FIELDS_DYNAMIC,
1729
                       selected=self.op.output_fields)
1730

    
1731
    # Lock all nodes, in shared mode
1732
    # Temporary removal of locks, should be reverted later
1733
    # TODO: reintroduce locks when they are lighter-weight
1734
    self.needed_locks = {}
1735
    #self.share_locks[locking.LEVEL_NODE] = 1
1736
    #self.needed_locks[locking.LEVEL_NODE] = locking.ALL_SET
1737

    
1738
  def CheckPrereq(self):
1739
    """Check prerequisites.
1740

1741
    """
1742

    
1743
  @staticmethod
1744
  def _DiagnoseByOS(node_list, rlist):
1745
    """Remaps a per-node return list into an a per-os per-node dictionary
1746

1747
    @param node_list: a list with the names of all nodes
1748
    @param rlist: a map with node names as keys and OS objects as values
1749

1750
    @rtype: dict
1751
    @return: a dictionary with osnames as keys and as value another map, with
1752
        nodes as keys and list of OS objects as values, eg::
1753

1754
          {"debian-etch": {"node1": [<object>,...],
1755
                           "node2": [<object>,]}
1756
          }
1757

1758
    """
1759
    all_os = {}
1760
    # we build here the list of nodes that didn't fail the RPC (at RPC
1761
    # level), so that nodes with a non-responding node daemon don't
1762
    # make all OSes invalid
1763
    good_nodes = [node_name for node_name in rlist
1764
                  if not rlist[node_name].failed]
1765
    for node_name, nr in rlist.iteritems():
1766
      if nr.failed or not nr.data:
1767
        continue
1768
      for os_obj in nr.data:
1769
        if os_obj.name not in all_os:
1770
          # build a list of nodes for this os containing empty lists
1771
          # for each node in node_list
1772
          all_os[os_obj.name] = {}
1773
          for nname in good_nodes:
1774
            all_os[os_obj.name][nname] = []
1775
        all_os[os_obj.name][node_name].append(os_obj)
1776
    return all_os
1777

    
1778
  def Exec(self, feedback_fn):
1779
    """Compute the list of OSes.
1780

1781
    """
1782
    valid_nodes = [node for node in self.cfg.GetOnlineNodeList()]
1783
    node_data = self.rpc.call_os_diagnose(valid_nodes)
1784
    if node_data == False:
1785
      raise errors.OpExecError("Can't gather the list of OSes")
1786
    pol = self._DiagnoseByOS(valid_nodes, node_data)
1787
    output = []
1788
    for os_name, os_data in pol.iteritems():
1789
      row = []
1790
      for field in self.op.output_fields:
1791
        if field == "name":
1792
          val = os_name
1793
        elif field == "valid":
1794
          val = utils.all([osl and osl[0] for osl in os_data.values()])
1795
        elif field == "node_status":
1796
          val = {}
1797
          for node_name, nos_list in os_data.iteritems():
1798
            val[node_name] = [(v.status, v.path) for v in nos_list]
1799
        else:
1800
          raise errors.ParameterError(field)
1801
        row.append(val)
1802
      output.append(row)
1803

    
1804
    return output
1805

    
1806

    
1807
class LURemoveNode(LogicalUnit):
1808
  """Logical unit for removing a node.
1809

1810
  """
1811
  HPATH = "node-remove"
1812
  HTYPE = constants.HTYPE_NODE
1813
  _OP_REQP = ["node_name"]
1814

    
1815
  def BuildHooksEnv(self):
1816
    """Build hooks env.
1817

1818
    This doesn't run on the target node in the pre phase as a failed
1819
    node would then be impossible to remove.
1820

1821
    """
1822
    env = {
1823
      "OP_TARGET": self.op.node_name,
1824
      "NODE_NAME": self.op.node_name,
1825
      }
1826
    all_nodes = self.cfg.GetNodeList()
1827
    all_nodes.remove(self.op.node_name)
1828
    return env, all_nodes, all_nodes
1829

    
1830
  def CheckPrereq(self):
1831
    """Check prerequisites.
1832

1833
    This checks:
1834
     - the node exists in the configuration
1835
     - it does not have primary or secondary instances
1836
     - it's not the master
1837

1838
    Any errors are signalled by raising errors.OpPrereqError.
1839

1840
    """
1841
    node = self.cfg.GetNodeInfo(self.cfg.ExpandNodeName(self.op.node_name))
1842
    if node is None:
1843
      raise errors.OpPrereqError, ("Node '%s' is unknown." % self.op.node_name)
1844

    
1845
    instance_list = self.cfg.GetInstanceList()
1846

    
1847
    masternode = self.cfg.GetMasterNode()
1848
    if node.name == masternode:
1849
      raise errors.OpPrereqError("Node is the master node,"
1850
                                 " you need to failover first.")
1851

    
1852
    for instance_name in instance_list:
1853
      instance = self.cfg.GetInstanceInfo(instance_name)
1854
      if node.name in instance.all_nodes:
1855
        raise errors.OpPrereqError("Instance %s is still running on the node,"
1856
                                   " please remove first." % instance_name)
1857
    self.op.node_name = node.name
1858
    self.node = node
1859

    
1860
  def Exec(self, feedback_fn):
1861
    """Removes the node from the cluster.
1862

1863
    """
1864
    node = self.node
1865
    logging.info("Stopping the node daemon and removing configs from node %s",
1866
                 node.name)
1867

    
1868
    self.context.RemoveNode(node.name)
1869

    
1870
    self.rpc.call_node_leave_cluster(node.name)
1871

    
1872
    # Promote nodes to master candidate as needed
1873
    _AdjustCandidatePool(self)
1874

    
1875

    
1876
class LUQueryNodes(NoHooksLU):
1877
  """Logical unit for querying nodes.
1878

1879
  """
1880
  _OP_REQP = ["output_fields", "names", "use_locking"]
1881
  REQ_BGL = False
1882
  _FIELDS_DYNAMIC = utils.FieldSet(
1883
    "dtotal", "dfree",
1884
    "mtotal", "mnode", "mfree",
1885
    "bootid",
1886
    "ctotal", "cnodes", "csockets",
1887
    )
1888

    
1889
  _FIELDS_STATIC = utils.FieldSet(
1890
    "name", "pinst_cnt", "sinst_cnt",
1891
    "pinst_list", "sinst_list",
1892
    "pip", "sip", "tags",
1893
    "serial_no",
1894
    "master_candidate",
1895
    "master",
1896
    "offline",
1897
    "drained",
1898
    )
1899

    
1900
  def ExpandNames(self):
1901
    _CheckOutputFields(static=self._FIELDS_STATIC,
1902
                       dynamic=self._FIELDS_DYNAMIC,
1903
                       selected=self.op.output_fields)
1904

    
1905
    self.needed_locks = {}
1906
    self.share_locks[locking.LEVEL_NODE] = 1
1907

    
1908
    if self.op.names:
1909
      self.wanted = _GetWantedNodes(self, self.op.names)
1910
    else:
1911
      self.wanted = locking.ALL_SET
1912

    
1913
    self.do_node_query = self._FIELDS_STATIC.NonMatching(self.op.output_fields)
1914
    self.do_locking = self.do_node_query and self.op.use_locking
1915
    if self.do_locking:
1916
      # if we don't request only static fields, we need to lock the nodes
1917
      self.needed_locks[locking.LEVEL_NODE] = self.wanted
1918

    
1919

    
1920
  def CheckPrereq(self):
1921
    """Check prerequisites.
1922

1923
    """
1924
    # The validation of the node list is done in the _GetWantedNodes,
1925
    # if non empty, and if empty, there's no validation to do
1926
    pass
1927

    
1928
  def Exec(self, feedback_fn):
1929
    """Computes the list of nodes and their attributes.
1930

1931
    """
1932
    all_info = self.cfg.GetAllNodesInfo()
1933
    if self.do_locking:
1934
      nodenames = self.acquired_locks[locking.LEVEL_NODE]
1935
    elif self.wanted != locking.ALL_SET:
1936
      nodenames = self.wanted
1937
      missing = set(nodenames).difference(all_info.keys())
1938
      if missing:
1939
        raise errors.OpExecError(
1940
          "Some nodes were removed before retrieving their data: %s" % missing)
1941
    else:
1942
      nodenames = all_info.keys()
1943

    
1944
    nodenames = utils.NiceSort(nodenames)
1945
    nodelist = [all_info[name] for name in nodenames]
1946

    
1947
    # begin data gathering
1948

    
1949
    if self.do_node_query:
1950
      live_data = {}
1951
      node_data = self.rpc.call_node_info(nodenames, self.cfg.GetVGName(),
1952
                                          self.cfg.GetHypervisorType())
1953
      for name in nodenames:
1954
        nodeinfo = node_data[name]
1955
        if not nodeinfo.failed and nodeinfo.data:
1956
          nodeinfo = nodeinfo.data
1957
          fn = utils.TryConvert
1958
          live_data[name] = {
1959
            "mtotal": fn(int, nodeinfo.get('memory_total', None)),
1960
            "mnode": fn(int, nodeinfo.get('memory_dom0', None)),
1961
            "mfree": fn(int, nodeinfo.get('memory_free', None)),
1962
            "dtotal": fn(int, nodeinfo.get('vg_size', None)),
1963
            "dfree": fn(int, nodeinfo.get('vg_free', None)),
1964
            "ctotal": fn(int, nodeinfo.get('cpu_total', None)),
1965
            "bootid": nodeinfo.get('bootid', None),
1966
            "cnodes": fn(int, nodeinfo.get('cpu_nodes', None)),
1967
            "csockets": fn(int, nodeinfo.get('cpu_sockets', None)),
1968
            }
1969
        else:
1970
          live_data[name] = {}
1971
    else:
1972
      live_data = dict.fromkeys(nodenames, {})
1973

    
1974
    node_to_primary = dict([(name, set()) for name in nodenames])
1975
    node_to_secondary = dict([(name, set()) for name in nodenames])
1976

    
1977
    inst_fields = frozenset(("pinst_cnt", "pinst_list",
1978
                             "sinst_cnt", "sinst_list"))
1979
    if inst_fields & frozenset(self.op.output_fields):
1980
      instancelist = self.cfg.GetInstanceList()
1981

    
1982
      for instance_name in instancelist:
1983
        inst = self.cfg.GetInstanceInfo(instance_name)
1984
        if inst.primary_node in node_to_primary:
1985
          node_to_primary[inst.primary_node].add(inst.name)
1986
        for secnode in inst.secondary_nodes:
1987
          if secnode in node_to_secondary:
1988
            node_to_secondary[secnode].add(inst.name)
1989

    
1990
    master_node = self.cfg.GetMasterNode()
1991

    
1992
    # end data gathering
1993

    
1994
    output = []
1995
    for node in nodelist:
1996
      node_output = []
1997
      for field in self.op.output_fields:
1998
        if field == "name":
1999
          val = node.name
2000
        elif field == "pinst_list":
2001
          val = list(node_to_primary[node.name])
2002
        elif field == "sinst_list":
2003
          val = list(node_to_secondary[node.name])
2004
        elif field == "pinst_cnt":
2005
          val = len(node_to_primary[node.name])
2006
        elif field == "sinst_cnt":
2007
          val = len(node_to_secondary[node.name])
2008
        elif field == "pip":
2009
          val = node.primary_ip
2010
        elif field == "sip":
2011
          val = node.secondary_ip
2012
        elif field == "tags":
2013
          val = list(node.GetTags())
2014
        elif field == "serial_no":
2015
          val = node.serial_no
2016
        elif field == "master_candidate":
2017
          val = node.master_candidate
2018
        elif field == "master":
2019
          val = node.name == master_node
2020
        elif field == "offline":
2021
          val = node.offline
2022
        elif field == "drained":
2023
          val = node.drained
2024
        elif self._FIELDS_DYNAMIC.Matches(field):
2025
          val = live_data[node.name].get(field, None)
2026
        else:
2027
          raise errors.ParameterError(field)
2028
        node_output.append(val)
2029
      output.append(node_output)
2030

    
2031
    return output
2032

    
2033

    
2034
class LUQueryNodeVolumes(NoHooksLU):
2035
  """Logical unit for getting volumes on node(s).
2036

2037
  """
2038
  _OP_REQP = ["nodes", "output_fields"]
2039
  REQ_BGL = False
2040
  _FIELDS_DYNAMIC = utils.FieldSet("phys", "vg", "name", "size", "instance")
2041
  _FIELDS_STATIC = utils.FieldSet("node")
2042

    
2043
  def ExpandNames(self):
2044
    _CheckOutputFields(static=self._FIELDS_STATIC,
2045
                       dynamic=self._FIELDS_DYNAMIC,
2046
                       selected=self.op.output_fields)
2047

    
2048
    self.needed_locks = {}
2049
    self.share_locks[locking.LEVEL_NODE] = 1
2050
    if not self.op.nodes:
2051
      self.needed_locks[locking.LEVEL_NODE] = locking.ALL_SET
2052
    else:
2053
      self.needed_locks[locking.LEVEL_NODE] = \
2054
        _GetWantedNodes(self, self.op.nodes)
2055

    
2056
  def CheckPrereq(self):
2057
    """Check prerequisites.
2058

2059
    This checks that the fields required are valid output fields.
2060

2061
    """
2062
    self.nodes = self.acquired_locks[locking.LEVEL_NODE]
2063

    
2064
  def Exec(self, feedback_fn):
2065
    """Computes the list of nodes and their attributes.
2066

2067
    """
2068
    nodenames = self.nodes
2069
    volumes = self.rpc.call_node_volumes(nodenames)
2070

    
2071
    ilist = [self.cfg.GetInstanceInfo(iname) for iname
2072
             in self.cfg.GetInstanceList()]
2073

    
2074
    lv_by_node = dict([(inst, inst.MapLVsByNode()) for inst in ilist])
2075

    
2076
    output = []
2077
    for node in nodenames:
2078
      if node not in volumes or volumes[node].failed or not volumes[node].data:
2079
        continue
2080

    
2081
      node_vols = volumes[node].data[:]
2082
      node_vols.sort(key=lambda vol: vol['dev'])
2083

    
2084
      for vol in node_vols:
2085
        node_output = []
2086
        for field in self.op.output_fields:
2087
          if field == "node":
2088
            val = node
2089
          elif field == "phys":
2090
            val = vol['dev']
2091
          elif field == "vg":
2092
            val = vol['vg']
2093
          elif field == "name":
2094
            val = vol['name']
2095
          elif field == "size":
2096
            val = int(float(vol['size']))
2097
          elif field == "instance":
2098
            for inst in ilist:
2099
              if node not in lv_by_node[inst]:
2100
                continue
2101
              if vol['name'] in lv_by_node[inst][node]:
2102
                val = inst.name
2103
                break
2104
            else:
2105
              val = '-'
2106
          else:
2107
            raise errors.ParameterError(field)
2108
          node_output.append(str(val))
2109

    
2110
        output.append(node_output)
2111

    
2112
    return output
2113

    
2114

    
2115
class LUAddNode(LogicalUnit):
2116
  """Logical unit for adding node to the cluster.
2117

2118
  """
2119
  HPATH = "node-add"
2120
  HTYPE = constants.HTYPE_NODE
2121
  _OP_REQP = ["node_name"]
2122

    
2123
  def BuildHooksEnv(self):
2124
    """Build hooks env.
2125

2126
    This will run on all nodes before, and on all nodes + the new node after.
2127

2128
    """
2129
    env = {
2130
      "OP_TARGET": self.op.node_name,
2131
      "NODE_NAME": self.op.node_name,
2132
      "NODE_PIP": self.op.primary_ip,
2133
      "NODE_SIP": self.op.secondary_ip,
2134
      }
2135
    nodes_0 = self.cfg.GetNodeList()
2136
    nodes_1 = nodes_0 + [self.op.node_name, ]
2137
    return env, nodes_0, nodes_1
2138

    
2139
  def CheckPrereq(self):
2140
    """Check prerequisites.
2141

2142
    This checks:
2143
     - the new node is not already in the config
2144
     - it is resolvable
2145
     - its parameters (single/dual homed) matches the cluster
2146

2147
    Any errors are signalled by raising errors.OpPrereqError.
2148

2149
    """
2150
    node_name = self.op.node_name
2151
    cfg = self.cfg
2152

    
2153
    dns_data = utils.HostInfo(node_name)
2154

    
2155
    node = dns_data.name
2156
    primary_ip = self.op.primary_ip = dns_data.ip
2157
    secondary_ip = getattr(self.op, "secondary_ip", None)
2158
    if secondary_ip is None:
2159
      secondary_ip = primary_ip
2160
    if not utils.IsValidIP(secondary_ip):
2161
      raise errors.OpPrereqError("Invalid secondary IP given")
2162
    self.op.secondary_ip = secondary_ip
2163

    
2164
    node_list = cfg.GetNodeList()
2165
    if not self.op.readd and node in node_list:
2166
      raise errors.OpPrereqError("Node %s is already in the configuration" %
2167
                                 node)
2168
    elif self.op.readd and node not in node_list:
2169
      raise errors.OpPrereqError("Node %s is not in the configuration" % node)
2170

    
2171
    for existing_node_name in node_list:
2172
      existing_node = cfg.GetNodeInfo(existing_node_name)
2173

    
2174
      if self.op.readd and node == existing_node_name:
2175
        if (existing_node.primary_ip != primary_ip or
2176
            existing_node.secondary_ip != secondary_ip):
2177
          raise errors.OpPrereqError("Readded node doesn't have the same IP"
2178
                                     " address configuration as before")
2179
        continue
2180

    
2181
      if (existing_node.primary_ip == primary_ip or
2182
          existing_node.secondary_ip == primary_ip or
2183
          existing_node.primary_ip == secondary_ip or
2184
          existing_node.secondary_ip == secondary_ip):
2185
        raise errors.OpPrereqError("New node ip address(es) conflict with"
2186
                                   " existing node %s" % existing_node.name)
2187

    
2188
    # check that the type of the node (single versus dual homed) is the
2189
    # same as for the master
2190
    myself = cfg.GetNodeInfo(self.cfg.GetMasterNode())
2191
    master_singlehomed = myself.secondary_ip == myself.primary_ip
2192
    newbie_singlehomed = secondary_ip == primary_ip
2193
    if master_singlehomed != newbie_singlehomed:
2194
      if master_singlehomed:
2195
        raise errors.OpPrereqError("The master has no private ip but the"
2196
                                   " new node has one")
2197
      else:
2198
        raise errors.OpPrereqError("The master has a private ip but the"
2199
                                   " new node doesn't have one")
2200

    
2201
    # checks reachablity
2202
    if not utils.TcpPing(primary_ip, constants.DEFAULT_NODED_PORT):
2203
      raise errors.OpPrereqError("Node not reachable by ping")
2204

    
2205
    if not newbie_singlehomed:
2206
      # check reachability from my secondary ip to newbie's secondary ip
2207
      if not utils.TcpPing(secondary_ip, constants.DEFAULT_NODED_PORT,
2208
                           source=myself.secondary_ip):
2209
        raise errors.OpPrereqError("Node secondary ip not reachable by TCP"
2210
                                   " based ping to noded port")
2211

    
2212
    cp_size = self.cfg.GetClusterInfo().candidate_pool_size
2213
    mc_now, _ = self.cfg.GetMasterCandidateStats()
2214
    master_candidate = mc_now < cp_size
2215

    
2216
    self.new_node = objects.Node(name=node,
2217
                                 primary_ip=primary_ip,
2218
                                 secondary_ip=secondary_ip,
2219
                                 master_candidate=master_candidate,
2220
                                 offline=False, drained=False)
2221

    
2222
  def Exec(self, feedback_fn):
2223
    """Adds the new node to the cluster.
2224

2225
    """
2226
    new_node = self.new_node
2227
    node = new_node.name
2228

    
2229
    # check connectivity
2230
    result = self.rpc.call_version([node])[node]
2231
    result.Raise()
2232
    if result.data:
2233
      if constants.PROTOCOL_VERSION == result.data:
2234
        logging.info("Communication to node %s fine, sw version %s match",
2235
                     node, result.data)
2236
      else:
2237
        raise errors.OpExecError("Version mismatch master version %s,"
2238
                                 " node version %s" %
2239
                                 (constants.PROTOCOL_VERSION, result.data))
2240
    else:
2241
      raise errors.OpExecError("Cannot get version from the new node")
2242

    
2243
    # setup ssh on node
2244
    logging.info("Copy ssh key to node %s", node)
2245
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
2246
    keyarray = []
2247
    keyfiles = [constants.SSH_HOST_DSA_PRIV, constants.SSH_HOST_DSA_PUB,
2248
                constants.SSH_HOST_RSA_PRIV, constants.SSH_HOST_RSA_PUB,
2249
                priv_key, pub_key]
2250

    
2251
    for i in keyfiles:
2252
      f = open(i, 'r')
2253
      try:
2254
        keyarray.append(f.read())
2255
      finally:
2256
        f.close()
2257

    
2258
    result = self.rpc.call_node_add(node, keyarray[0], keyarray[1],
2259
                                    keyarray[2],
2260
                                    keyarray[3], keyarray[4], keyarray[5])
2261

    
2262
    msg = result.RemoteFailMsg()
2263
    if msg:
2264
      raise errors.OpExecError("Cannot transfer ssh keys to the"
2265
                               " new node: %s" % msg)
2266

    
2267
    # Add node to our /etc/hosts, and add key to known_hosts
2268
    if self.cfg.GetClusterInfo().modify_etc_hosts:
2269
      utils.AddHostToEtcHosts(new_node.name)
2270

    
2271
    if new_node.secondary_ip != new_node.primary_ip:
2272
      result = self.rpc.call_node_has_ip_address(new_node.name,
2273
                                                 new_node.secondary_ip)
2274
      if result.failed or not result.data:
2275
        raise errors.OpExecError("Node claims it doesn't have the secondary ip"
2276
                                 " you gave (%s). Please fix and re-run this"
2277
                                 " command." % new_node.secondary_ip)
2278

    
2279
    node_verify_list = [self.cfg.GetMasterNode()]
2280
    node_verify_param = {
2281
      'nodelist': [node],
2282
      # TODO: do a node-net-test as well?
2283
    }
2284

    
2285
    result = self.rpc.call_node_verify(node_verify_list, node_verify_param,
2286
                                       self.cfg.GetClusterName())
2287
    for verifier in node_verify_list:
2288
      if result[verifier].failed or not result[verifier].data:
2289
        raise errors.OpExecError("Cannot communicate with %s's node daemon"
2290
                                 " for remote verification" % verifier)
2291
      if result[verifier].data['nodelist']:
2292
        for failed in result[verifier].data['nodelist']:
2293
          feedback_fn("ssh/hostname verification failed %s -> %s" %
2294
                      (verifier, result[verifier].data['nodelist'][failed]))
2295
        raise errors.OpExecError("ssh/hostname verification failed.")
2296

    
2297
    if self.op.readd:
2298
      _RedistributeAncillaryFiles(self)
2299
      self.context.ReaddNode(new_node)
2300
    else:
2301
      _RedistributeAncillaryFiles(self, additional_nodes=node)
2302
      self.context.AddNode(new_node)
2303

    
2304

    
2305
class LUSetNodeParams(LogicalUnit):
2306
  """Modifies the parameters of a node.
2307

2308
  """
2309
  HPATH = "node-modify"
2310
  HTYPE = constants.HTYPE_NODE
2311
  _OP_REQP = ["node_name"]
2312
  REQ_BGL = False
2313

    
2314
  def CheckArguments(self):
2315
    node_name = self.cfg.ExpandNodeName(self.op.node_name)
2316
    if node_name is None:
2317
      raise errors.OpPrereqError("Invalid node name '%s'" % self.op.node_name)
2318
    self.op.node_name = node_name
2319
    _CheckBooleanOpField(self.op, 'master_candidate')
2320
    _CheckBooleanOpField(self.op, 'offline')
2321
    _CheckBooleanOpField(self.op, 'drained')
2322
    all_mods = [self.op.offline, self.op.master_candidate, self.op.drained]
2323
    if all_mods.count(None) == 3:
2324
      raise errors.OpPrereqError("Please pass at least one modification")
2325
    if all_mods.count(True) > 1:
2326
      raise errors.OpPrereqError("Can't set the node into more than one"
2327
                                 " state at the same time")
2328

    
2329
  def ExpandNames(self):
2330
    self.needed_locks = {locking.LEVEL_NODE: self.op.node_name}
2331

    
2332
  def BuildHooksEnv(self):
2333
    """Build hooks env.
2334

2335
    This runs on the master node.
2336

2337
    """
2338
    env = {
2339
      "OP_TARGET": self.op.node_name,
2340
      "MASTER_CANDIDATE": str(self.op.master_candidate),
2341
      "OFFLINE": str(self.op.offline),
2342
      "DRAINED": str(self.op.drained),
2343
      }
2344
    nl = [self.cfg.GetMasterNode(),
2345
          self.op.node_name]
2346
    return env, nl, nl
2347

    
2348
  def CheckPrereq(self):
2349
    """Check prerequisites.
2350

2351
    This only checks the instance list against the existing names.
2352

2353
    """
2354
    node = self.node = self.cfg.GetNodeInfo(self.op.node_name)
2355

    
2356
    if ((self.op.master_candidate == False or self.op.offline == True or
2357
         self.op.drained == True) and node.master_candidate):
2358
      # we will demote the node from master_candidate
2359
      if self.op.node_name == self.cfg.GetMasterNode():
2360
        raise errors.OpPrereqError("The master node has to be a"
2361
                                   " master candidate, online and not drained")
2362
      cp_size = self.cfg.GetClusterInfo().candidate_pool_size
2363
      num_candidates, _ = self.cfg.GetMasterCandidateStats()
2364
      if num_candidates <= cp_size:
2365
        msg = ("Not enough master candidates (desired"
2366
               " %d, new value will be %d)" % (cp_size, num_candidates-1))
2367
        if self.op.force:
2368
          self.LogWarning(msg)
2369
        else:
2370
          raise errors.OpPrereqError(msg)
2371

    
2372
    if (self.op.master_candidate == True and
2373
        ((node.offline and not self.op.offline == False) or
2374
         (node.drained and not self.op.drained == False))):
2375
      raise errors.OpPrereqError("Node '%s' is offline or drained, can't set"
2376
                                 " to master_candidate" % node.name)
2377

    
2378
    return
2379

    
2380
  def Exec(self, feedback_fn):
2381
    """Modifies a node.
2382

2383
    """
2384
    node = self.node
2385

    
2386
    result = []
2387
    changed_mc = False
2388

    
2389
    if self.op.offline is not None:
2390
      node.offline = self.op.offline
2391
      result.append(("offline", str(self.op.offline)))
2392
      if self.op.offline == True:
2393
        if node.master_candidate:
2394
          node.master_candidate = False
2395
          changed_mc = True
2396
          result.append(("master_candidate", "auto-demotion due to offline"))
2397
        if node.drained:
2398
          node.drained = False
2399
          result.append(("drained", "clear drained status due to offline"))
2400

    
2401
    if self.op.master_candidate is not None:
2402
      node.master_candidate = self.op.master_candidate
2403
      changed_mc = True
2404
      result.append(("master_candidate", str(self.op.master_candidate)))
2405
      if self.op.master_candidate == False:
2406
        rrc = self.rpc.call_node_demote_from_mc(node.name)
2407
        msg = rrc.RemoteFailMsg()
2408
        if msg:
2409
          self.LogWarning("Node failed to demote itself: %s" % msg)
2410

    
2411
    if self.op.drained is not None:
2412
      node.drained = self.op.drained
2413
      result.append(("drained", str(self.op.drained)))
2414
      if self.op.drained == True:
2415
        if node.master_candidate:
2416
          node.master_candidate = False
2417
          changed_mc = True
2418
          result.append(("master_candidate", "auto-demotion due to drain"))
2419
        if node.offline:
2420
          node.offline = False
2421
          result.append(("offline", "clear offline status due to drain"))
2422

    
2423
    # this will trigger configuration file update, if needed
2424
    self.cfg.Update(node)
2425
    # this will trigger job queue propagation or cleanup
2426
    if changed_mc:
2427
      self.context.ReaddNode(node)
2428

    
2429
    return result
2430

    
2431

    
2432
class LUPowercycleNode(NoHooksLU):
2433
  """Powercycles a node.
2434

2435
  """
2436
  _OP_REQP = ["node_name", "force"]
2437
  REQ_BGL = False
2438

    
2439
  def CheckArguments(self):
2440
    node_name = self.cfg.ExpandNodeName(self.op.node_name)
2441
    if node_name is None:
2442
      raise errors.OpPrereqError("Invalid node name '%s'" % self.op.node_name)
2443
    self.op.node_name = node_name
2444
    if node_name == self.cfg.GetMasterNode() and not self.op.force:
2445
      raise errors.OpPrereqError("The node is the master and the force"
2446
                                 " parameter was not set")
2447

    
2448
  def ExpandNames(self):
2449
    """Locking for PowercycleNode.
2450

2451
    This is a last-resource option and shouldn't block on other
2452
    jobs. Therefore, we grab no locks.
2453

2454
    """
2455
    self.needed_locks = {}
2456

    
2457
  def CheckPrereq(self):
2458
    """Check prerequisites.
2459

2460
    This LU has no prereqs.
2461

2462
    """
2463
    pass
2464

    
2465
  def Exec(self, feedback_fn):
2466
    """Reboots a node.
2467

2468
    """
2469
    result = self.rpc.call_node_powercycle(self.op.node_name,
2470
                                           self.cfg.GetHypervisorType())
2471
    msg = result.RemoteFailMsg()
2472
    if msg:
2473
      raise errors.OpExecError("Failed to schedule the reboot: %s" % msg)
2474
    return result.payload
2475

    
2476

    
2477
class LUQueryClusterInfo(NoHooksLU):
2478
  """Query cluster configuration.
2479

2480
  """
2481
  _OP_REQP = []
2482
  REQ_BGL = False
2483

    
2484
  def ExpandNames(self):
2485
    self.needed_locks = {}
2486

    
2487
  def CheckPrereq(self):
2488
    """No prerequsites needed for this LU.
2489

2490
    """
2491
    pass
2492

    
2493
  def Exec(self, feedback_fn):
2494
    """Return cluster config.
2495

2496
    """
2497
    cluster = self.cfg.GetClusterInfo()
2498
    result = {
2499
      "software_version": constants.RELEASE_VERSION,
2500
      "protocol_version": constants.PROTOCOL_VERSION,
2501
      "config_version": constants.CONFIG_VERSION,
2502
      "os_api_version": constants.OS_API_VERSION,
2503
      "export_version": constants.EXPORT_VERSION,
2504
      "architecture": (platform.architecture()[0], platform.machine()),
2505
      "name": cluster.cluster_name,
2506
      "master": cluster.master_node,
2507
      "default_hypervisor": cluster.default_hypervisor,
2508
      "enabled_hypervisors": cluster.enabled_hypervisors,
2509
      "hvparams": dict([(hypervisor, cluster.hvparams[hypervisor])
2510
                        for hypervisor in cluster.enabled_hypervisors]),
2511
      "beparams": cluster.beparams,
2512
      "candidate_pool_size": cluster.candidate_pool_size,
2513
      "default_bridge": cluster.default_bridge,
2514
      "master_netdev": cluster.master_netdev,
2515
      "volume_group_name": cluster.volume_group_name,
2516
      "file_storage_dir": cluster.file_storage_dir,
2517
      }
2518

    
2519
    return result
2520

    
2521

    
2522
class LUQueryConfigValues(NoHooksLU):
2523
  """Return configuration values.
2524

2525
  """
2526
  _OP_REQP = []
2527
  REQ_BGL = False
2528
  _FIELDS_DYNAMIC = utils.FieldSet()
2529
  _FIELDS_STATIC = utils.FieldSet("cluster_name", "master_node", "drain_flag")
2530

    
2531
  def ExpandNames(self):
2532
    self.needed_locks = {}
2533

    
2534
    _CheckOutputFields(static=self._FIELDS_STATIC,
2535
                       dynamic=self._FIELDS_DYNAMIC,
2536
                       selected=self.op.output_fields)
2537

    
2538
  def CheckPrereq(self):
2539
    """No prerequisites.
2540

2541
    """
2542
    pass
2543

    
2544
  def Exec(self, feedback_fn):
2545
    """Dump a representation of the cluster config to the standard output.
2546

2547
    """
2548
    values = []
2549
    for field in self.op.output_fields:
2550
      if field == "cluster_name":
2551
        entry = self.cfg.GetClusterName()
2552
      elif field == "master_node":
2553
        entry = self.cfg.GetMasterNode()
2554
      elif field == "drain_flag":
2555
        entry = os.path.exists(constants.JOB_QUEUE_DRAIN_FILE)
2556
      else:
2557
        raise errors.ParameterError(field)
2558
      values.append(entry)
2559
    return values
2560

    
2561

    
2562
class LUActivateInstanceDisks(NoHooksLU):
2563
  """Bring up an instance's disks.
2564

2565
  """
2566
  _OP_REQP = ["instance_name"]
2567
  REQ_BGL = False
2568

    
2569
  def ExpandNames(self):
2570
    self._ExpandAndLockInstance()
2571
    self.needed_locks[locking.LEVEL_NODE] = []
2572
    self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
2573

    
2574
  def DeclareLocks(self, level):
2575
    if level == locking.LEVEL_NODE:
2576
      self._LockInstancesNodes()
2577

    
2578
  def CheckPrereq(self):
2579
    """Check prerequisites.
2580

2581
    This checks that the instance is in the cluster.
2582

2583
    """
2584
    self.instance = self.cfg.GetInstanceInfo(self.op.instance_name)
2585
    assert self.instance is not None, \
2586
      "Cannot retrieve locked instance %s" % self.op.instance_name
2587
    _CheckNodeOnline(self, self.instance.primary_node)
2588

    
2589
  def Exec(self, feedback_fn):
2590
    """Activate the disks.
2591

2592
    """
2593
    disks_ok, disks_info = _AssembleInstanceDisks(self, self.instance)
2594
    if not disks_ok:
2595
      raise errors.OpExecError("Cannot activate block devices")
2596

    
2597
    return disks_info
2598

    
2599

    
2600
def _AssembleInstanceDisks(lu, instance, ignore_secondaries=False):
2601
  """Prepare the block devices for an instance.
2602

2603
  This sets up the block devices on all nodes.
2604

2605
  @type lu: L{LogicalUnit}
2606
  @param lu: the logical unit on whose behalf we execute
2607
  @type instance: L{objects.Instance}
2608
  @param instance: the instance for whose disks we assemble
2609
  @type ignore_secondaries: boolean
2610
  @param ignore_secondaries: if true, errors on secondary nodes
2611
      won't result in an error return from the function
2612
  @return: False if the operation failed, otherwise a list of
2613
      (host, instance_visible_name, node_visible_name)
2614
      with the mapping from node devices to instance devices
2615

2616
  """
2617
  device_info = []
2618
  disks_ok = True
2619
  iname = instance.name
2620
  # With the two passes mechanism we try to reduce the window of
2621
  # opportunity for the race condition of switching DRBD to primary
2622
  # before handshaking occured, but we do not eliminate it
2623

    
2624
  # The proper fix would be to wait (with some limits) until the
2625
  # connection has been made and drbd transitions from WFConnection
2626
  # into any other network-connected state (Connected, SyncTarget,
2627
  # SyncSource, etc.)
2628

    
2629
  # 1st pass, assemble on all nodes in secondary mode
2630
  for inst_disk in instance.disks:
2631
    for node, node_disk in inst_disk.ComputeNodeTree(instance.primary_node):
2632
      lu.cfg.SetDiskID(node_disk, node)
2633
      result = lu.rpc.call_blockdev_assemble(node, node_disk, iname, False)
2634
      msg = result.RemoteFailMsg()
2635
      if msg:
2636
        lu.proc.LogWarning("Could not prepare block device %s on node %s"
2637
                           " (is_primary=False, pass=1): %s",
2638
                           inst_disk.iv_name, node, msg)
2639
        if not ignore_secondaries:
2640
          disks_ok = False
2641

    
2642
  # FIXME: race condition on drbd migration to primary
2643

    
2644
  # 2nd pass, do only the primary node
2645
  for inst_disk in instance.disks:
2646
    for node, node_disk in inst_disk.ComputeNodeTree(instance.primary_node):
2647
      if node != instance.primary_node:
2648
        continue
2649
      lu.cfg.SetDiskID(node_disk, node)
2650
      result = lu.rpc.call_blockdev_assemble(node, node_disk, iname, True)
2651
      msg = result.RemoteFailMsg()
2652
      if msg:
2653
        lu.proc.LogWarning("Could not prepare block device %s on node %s"
2654
                           " (is_primary=True, pass=2): %s",
2655
                           inst_disk.iv_name, node, msg)
2656
        disks_ok = False
2657
    device_info.append((instance.primary_node, inst_disk.iv_name,
2658
                        result.payload))
2659

    
2660
  # leave the disks configured for the primary node
2661
  # this is a workaround that would be fixed better by
2662
  # improving the logical/physical id handling
2663
  for disk in instance.disks:
2664
    lu.cfg.SetDiskID(disk, instance.primary_node)
2665

    
2666
  return disks_ok, device_info
2667

    
2668

    
2669
def _StartInstanceDisks(lu, instance, force):
2670
  """Start the disks of an instance.
2671

2672
  """
2673
  disks_ok, dummy = _AssembleInstanceDisks(lu, instance,
2674
                                           ignore_secondaries=force)
2675
  if not disks_ok:
2676
    _ShutdownInstanceDisks(lu, instance)
2677
    if force is not None and not force:
2678
      lu.proc.LogWarning("", hint="If the message above refers to a"
2679
                         " secondary node,"
2680
                         " you can retry the operation using '--force'.")
2681
    raise errors.OpExecError("Disk consistency error")
2682

    
2683

    
2684
class LUDeactivateInstanceDisks(NoHooksLU):
2685
  """Shutdown an instance's disks.
2686

2687
  """
2688
  _OP_REQP = ["instance_name"]
2689
  REQ_BGL = False
2690

    
2691
  def ExpandNames(self):
2692
    self._ExpandAndLockInstance()
2693
    self.needed_locks[locking.LEVEL_NODE] = []
2694
    self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
2695

    
2696
  def DeclareLocks(self, level):
2697
    if level == locking.LEVEL_NODE:
2698
      self._LockInstancesNodes()
2699

    
2700
  def CheckPrereq(self):
2701
    """Check prerequisites.
2702

2703
    This checks that the instance is in the cluster.
2704

2705
    """
2706
    self.instance = self.cfg.GetInstanceInfo(self.op.instance_name)
2707
    assert self.instance is not None, \
2708
      "Cannot retrieve locked instance %s" % self.op.instance_name
2709

    
2710
  def Exec(self, feedback_fn):
2711
    """Deactivate the disks
2712

2713
    """
2714
    instance = self.instance
2715
    _SafeShutdownInstanceDisks(self, instance)
2716

    
2717

    
2718
def _SafeShutdownInstanceDisks(lu, instance):
2719
  """Shutdown block devices of an instance.
2720

2721
  This function checks if an instance is running, before calling
2722
  _ShutdownInstanceDisks.
2723

2724
  """
2725
  ins_l = lu.rpc.call_instance_list([instance.primary_node],
2726
                                      [instance.hypervisor])
2727
  ins_l = ins_l[instance.primary_node]
2728
  if ins_l.failed or not isinstance(ins_l.data, list):
2729
    raise errors.OpExecError("Can't contact node '%s'" %
2730
                             instance.primary_node)
2731

    
2732
  if instance.name in ins_l.data:
2733
    raise errors.OpExecError("Instance is running, can't shutdown"
2734
                             " block devices.")
2735

    
2736
  _ShutdownInstanceDisks(lu, instance)
2737

    
2738

    
2739
def _ShutdownInstanceDisks(lu, instance, ignore_primary=False):
2740
  """Shutdown block devices of an instance.
2741

2742
  This does the shutdown on all nodes of the instance.
2743

2744
  If the ignore_primary is false, errors on the primary node are
2745
  ignored.
2746

2747
  """
2748
  all_result = True
2749
  for disk in instance.disks:
2750
    for node, top_disk in disk.ComputeNodeTree(instance.primary_node):
2751
      lu.cfg.SetDiskID(top_disk, node)
2752
      result = lu.rpc.call_blockdev_shutdown(node, top_disk)
2753
      msg = result.RemoteFailMsg()
2754
      if msg:
2755
        lu.LogWarning("Could not shutdown block device %s on node %s: %s",
2756
                      disk.iv_name, node, msg)
2757
        if not ignore_primary or node != instance.primary_node:
2758
          all_result = False
2759
  return all_result
2760

    
2761

    
2762
def _CheckNodeFreeMemory(lu, node, reason, requested, hypervisor_name):
2763
  """Checks if a node has enough free memory.
2764

2765
  This function check if a given node has the needed amount of free
2766
  memory. In case the node has less memory or we cannot get the
2767
  information from the node, this function raise an OpPrereqError
2768
  exception.
2769

2770
  @type lu: C{LogicalUnit}
2771
  @param lu: a logical unit from which we get configuration data
2772
  @type node: C{str}
2773
  @param node: the node to check
2774
  @type reason: C{str}
2775
  @param reason: string to use in the error message
2776
  @type requested: C{int}
2777
  @param requested: the amount of memory in MiB to check for
2778
  @type hypervisor_name: C{str}
2779
  @param hypervisor_name: the hypervisor to ask for memory stats
2780
  @raise errors.OpPrereqError: if the node doesn't have enough memory, or
2781
      we cannot check the node
2782

2783
  """
2784
  nodeinfo = lu.rpc.call_node_info([node], lu.cfg.GetVGName(), hypervisor_name)
2785
  nodeinfo[node].Raise()
2786
  free_mem = nodeinfo[node].data.get('memory_free')
2787
  if not isinstance(free_mem, int):
2788
    raise errors.OpPrereqError("Can't compute free memory on node %s, result"
2789
                             " was '%s'" % (node, free_mem))
2790
  if requested > free_mem:
2791
    raise errors.OpPrereqError("Not enough memory on node %s for %s:"
2792
                             " needed %s MiB, available %s MiB" %
2793
                             (node, reason, requested, free_mem))
2794

    
2795

    
2796
class LUStartupInstance(LogicalUnit):
2797
  """Starts an instance.
2798

2799
  """
2800
  HPATH = "instance-start"
2801
  HTYPE = constants.HTYPE_INSTANCE
2802
  _OP_REQP = ["instance_name", "force"]
2803
  REQ_BGL = False
2804

    
2805
  def ExpandNames(self):
2806
    self._ExpandAndLockInstance()
2807

    
2808
  def BuildHooksEnv(self):
2809
    """Build hooks env.
2810

2811
    This runs on master, primary and secondary nodes of the instance.
2812

2813
    """
2814
    env = {
2815
      "FORCE": self.op.force,
2816
      }
2817
    env.update(_BuildInstanceHookEnvByObject(self, self.instance))
2818
    nl = [self.cfg.GetMasterNode()] + list(self.instance.all_nodes)
2819
    return env, nl, nl
2820

    
2821
  def CheckPrereq(self):
2822
    """Check prerequisites.
2823

2824
    This checks that the instance is in the cluster.
2825

2826
    """
2827
    self.instance = instance = self.cfg.GetInstanceInfo(self.op.instance_name)
2828
    assert self.instance is not None, \
2829
      "Cannot retrieve locked instance %s" % self.op.instance_name
2830

    
2831
    # extra beparams
2832
    self.beparams = getattr(self.op, "beparams", {})
2833
    if self.beparams:
2834
      if not isinstance(self.beparams, dict):
2835
        raise errors.OpPrereqError("Invalid beparams passed: %s, expected"
2836
                                   " dict" % (type(self.beparams), ))
2837
      # fill the beparams dict
2838
      utils.ForceDictType(self.beparams, constants.BES_PARAMETER_TYPES)
2839
      self.op.beparams = self.beparams
2840

    
2841
    # extra hvparams
2842
    self.hvparams = getattr(self.op, "hvparams", {})
2843
    if self.hvparams:
2844
      if not isinstance(self.hvparams, dict):
2845
        raise errors.OpPrereqError("Invalid hvparams passed: %s, expected"
2846
                                   " dict" % (type(self.hvparams), ))
2847

    
2848
      # check hypervisor parameter syntax (locally)
2849
      cluster = self.cfg.GetClusterInfo()
2850
      utils.ForceDictType(self.hvparams, constants.HVS_PARAMETER_TYPES)
2851
      filled_hvp = cluster.FillDict(cluster.hvparams[instance.hypervisor],
2852
                                    instance.hvparams)
2853
      filled_hvp.update(self.hvparams)
2854
      hv_type = hypervisor.GetHypervisor(instance.hypervisor)
2855
      hv_type.CheckParameterSyntax(filled_hvp)
2856
      _CheckHVParams(self, instance.all_nodes, instance.hypervisor, filled_hvp)
2857
      self.op.hvparams = self.hvparams
2858

    
2859
    _CheckNodeOnline(self, instance.primary_node)
2860

    
2861
    bep = self.cfg.GetClusterInfo().FillBE(instance)
2862
    # check bridges existance
2863
    _CheckInstanceBridgesExist(self, instance)
2864

    
2865
    remote_info = self.rpc.call_instance_info(instance.primary_node,
2866
                                              instance.name,
2867
                                              instance.hypervisor)
2868
    remote_info.Raise()
2869
    if not remote_info.data:
2870
      _CheckNodeFreeMemory(self, instance.primary_node,
2871
                           "starting instance %s" % instance.name,
2872
                           bep[constants.BE_MEMORY], instance.hypervisor)
2873

    
2874
  def Exec(self, feedback_fn):
2875
    """Start the instance.
2876

2877
    """
2878
    instance = self.instance
2879
    force = self.op.force
2880

    
2881
    self.cfg.MarkInstanceUp(instance.name)
2882

    
2883
    node_current = instance.primary_node
2884

    
2885
    _StartInstanceDisks(self, instance, force)
2886

    
2887
    result = self.rpc.call_instance_start(node_current, instance,
2888
                                          self.hvparams, self.beparams)
2889
    msg = result.RemoteFailMsg()
2890
    if msg:
2891
      _ShutdownInstanceDisks(self, instance)
2892
      raise errors.OpExecError("Could not start instance: %s" % msg)
2893

    
2894

    
2895
class LURebootInstance(LogicalUnit):
2896
  """Reboot an instance.
2897

2898
  """
2899
  HPATH = "instance-reboot"
2900
  HTYPE = constants.HTYPE_INSTANCE
2901
  _OP_REQP = ["instance_name", "ignore_secondaries", "reboot_type"]
2902
  REQ_BGL = False
2903

    
2904
  def ExpandNames(self):
2905
    if self.op.reboot_type not in [constants.INSTANCE_REBOOT_SOFT,
2906
                                   constants.INSTANCE_REBOOT_HARD,
2907
                                   constants.INSTANCE_REBOOT_FULL]:
2908
      raise errors.ParameterError("reboot type not in [%s, %s, %s]" %
2909
                                  (constants.INSTANCE_REBOOT_SOFT,
2910
                                   constants.INSTANCE_REBOOT_HARD,
2911
                                   constants.INSTANCE_REBOOT_FULL))
2912
    self._ExpandAndLockInstance()
2913

    
2914
  def BuildHooksEnv(self):
2915
    """Build hooks env.
2916

2917
    This runs on master, primary and secondary nodes of the instance.
2918

2919
    """
2920
    env = {
2921
      "IGNORE_SECONDARIES": self.op.ignore_secondaries,
2922
      "REBOOT_TYPE": self.op.reboot_type,
2923
      }
2924
    env.update(_BuildInstanceHookEnvByObject(self, self.instance))
2925
    nl = [self.cfg.GetMasterNode()] + list(self.instance.all_nodes)
2926
    return env, nl, nl
2927

    
2928
  def CheckPrereq(self):
2929
    """Check prerequisites.
2930

2931
    This checks that the instance is in the cluster.
2932

2933
    """
2934
    self.instance = instance = self.cfg.GetInstanceInfo(self.op.instance_name)
2935
    assert self.instance is not None, \
2936
      "Cannot retrieve locked instance %s" % self.op.instance_name
2937

    
2938
    _CheckNodeOnline(self, instance.primary_node)
2939

    
2940
    # check bridges existance
2941
    _CheckInstanceBridgesExist(self, instance)
2942

    
2943
  def Exec(self, feedback_fn):
2944
    """Reboot the instance.
2945

2946
    """
2947
    instance = self.instance
2948
    ignore_secondaries = self.op.ignore_secondaries
2949
    reboot_type = self.op.reboot_type
2950

    
2951
    node_current = instance.primary_node
2952

    
2953
    if reboot_type in [constants.INSTANCE_REBOOT_SOFT,
2954
                       constants.INSTANCE_REBOOT_HARD]:
2955
      for disk in instance.disks:
2956
        self.cfg.SetDiskID(disk, node_current)
2957
      result = self.rpc.call_instance_reboot(node_current, instance,
2958
                                             reboot_type)
2959
      msg = result.RemoteFailMsg()
2960
      if msg:
2961
        raise errors.OpExecError("Could not reboot instance: %s" % msg)
2962
    else:
2963
      result = self.rpc.call_instance_shutdown(node_current, instance)
2964
      msg = result.RemoteFailMsg()
2965
      if msg:
2966
        raise errors.OpExecError("Could not shutdown instance for"
2967
                                 " full reboot: %s" % msg)
2968
      _ShutdownInstanceDisks(self, instance)
2969
      _StartInstanceDisks(self, instance, ignore_secondaries)
2970
      result = self.rpc.call_instance_start(node_current, instance, None, None)
2971
      msg = result.RemoteFailMsg()
2972
      if msg:
2973
        _ShutdownInstanceDisks(self, instance)
2974
        raise errors.OpExecError("Could not start instance for"
2975
                                 " full reboot: %s" % msg)
2976

    
2977
    self.cfg.MarkInstanceUp(instance.name)
2978

    
2979

    
2980
class LUShutdownInstance(LogicalUnit):
2981
  """Shutdown an instance.
2982

2983
  """
2984
  HPATH = "instance-stop"
2985
  HTYPE = constants.HTYPE_INSTANCE
2986
  _OP_REQP = ["instance_name"]
2987
  REQ_BGL = False
2988

    
2989
  def ExpandNames(self):
2990
    self._ExpandAndLockInstance()
2991

    
2992
  def BuildHooksEnv(self):
2993
    """Build hooks env.
2994

2995
    This runs on master, primary and secondary nodes of the instance.
2996

2997
    """
2998
    env = _BuildInstanceHookEnvByObject(self, self.instance)
2999
    nl = [self.cfg.GetMasterNode()] + list(self.instance.all_nodes)
3000
    return env, nl, nl
3001

    
3002
  def CheckPrereq(self):
3003
    """Check prerequisites.
3004

3005
    This checks that the instance is in the cluster.
3006

3007
    """
3008
    self.instance = self.cfg.GetInstanceInfo(self.op.instance_name)
3009
    assert self.instance is not None, \
3010
      "Cannot retrieve locked instance %s" % self.op.instance_name
3011
    _CheckNodeOnline(self, self.instance.primary_node)
3012

    
3013
  def Exec(self, feedback_fn):
3014
    """Shutdown the instance.
3015

3016
    """
3017
    instance = self.instance
3018
    node_current = instance.primary_node
3019
    self.cfg.MarkInstanceDown(instance.name)
3020
    result = self.rpc.call_instance_shutdown(node_current, instance)
3021
    msg = result.RemoteFailMsg()
3022
    if msg:
3023
      self.proc.LogWarning("Could not shutdown instance: %s" % msg)
3024

    
3025
    _ShutdownInstanceDisks(self, instance)
3026

    
3027

    
3028
class LUReinstallInstance(LogicalUnit):
3029
  """Reinstall an instance.
3030

3031
  """
3032
  HPATH = "instance-reinstall"
3033
  HTYPE = constants.HTYPE_INSTANCE
3034
  _OP_REQP = ["instance_name"]
3035
  REQ_BGL = False
3036

    
3037
  def ExpandNames(self):
3038
    self._ExpandAndLockInstance()
3039

    
3040
  def BuildHooksEnv(self):
3041
    """Build hooks env.
3042

3043
    This runs on master, primary and secondary nodes of the instance.
3044

3045
    """
3046
    env = _BuildInstanceHookEnvByObject(self, self.instance)
3047
    nl = [self.cfg.GetMasterNode()] + list(self.instance.all_nodes)
3048
    return env, nl, nl
3049

    
3050
  def CheckPrereq(self):
3051
    """Check prerequisites.
3052

3053
    This checks that the instance is in the cluster and is not running.
3054

3055
    """
3056
    instance = self.cfg.GetInstanceInfo(self.op.instance_name)
3057
    assert instance is not None, \
3058
      "Cannot retrieve locked instance %s" % self.op.instance_name
3059
    _CheckNodeOnline(self, instance.primary_node)
3060

    
3061
    if instance.disk_template == constants.DT_DISKLESS:
3062
      raise errors.OpPrereqError("Instance '%s' has no disks" %
3063
                                 self.op.instance_name)
3064
    if instance.admin_up:
3065
      raise errors.OpPrereqError("Instance '%s' is marked to be up" %
3066
                                 self.op.instance_name)
3067
    remote_info = self.rpc.call_instance_info(instance.primary_node,
3068
                                              instance.name,
3069
                                              instance.hypervisor)
3070
    remote_info.Raise()
3071
    if remote_info.data:
3072
      raise errors.OpPrereqError("Instance '%s' is running on the node %s" %
3073
                                 (self.op.instance_name,
3074
                                  instance.primary_node))
3075

    
3076
    self.op.os_type = getattr(self.op, "os_type", None)
3077
    if self.op.os_type is not None:
3078
      # OS verification
3079
      pnode = self.cfg.GetNodeInfo(
3080
        self.cfg.ExpandNodeName(instance.primary_node))
3081
      if pnode is None:
3082
        raise errors.OpPrereqError("Primary node '%s' is unknown" %
3083
                                   self.op.pnode)
3084
      result = self.rpc.call_os_get(pnode.name, self.op.os_type)
3085
      result.Raise()
3086
      if not isinstance(result.data, objects.OS):
3087
        raise errors.OpPrereqError("OS '%s' not in supported OS list for"
3088
                                   " primary node"  % self.op.os_type)
3089

    
3090
    self.instance = instance
3091

    
3092
  def Exec(self, feedback_fn):
3093
    """Reinstall the instance.
3094

3095
    """
3096
    inst = self.instance
3097

    
3098
    if self.op.os_type is not None:
3099
      feedback_fn("Changing OS to '%s'..." % self.op.os_type)
3100
      inst.os = self.op.os_type
3101
      self.cfg.Update(inst)
3102

    
3103
    _StartInstanceDisks(self, inst, None)
3104
    try:
3105
      feedback_fn("Running the instance OS create scripts...")
3106
      result = self.rpc.call_instance_os_add(inst.primary_node, inst, True)
3107
      msg = result.RemoteFailMsg()
3108
      if msg:
3109
        raise errors.OpExecError("Could not install OS for instance %s"
3110
                                 " on node %s: %s" %
3111
                                 (inst.name, inst.primary_node, msg))
3112
    finally:
3113
      _ShutdownInstanceDisks(self, inst)
3114

    
3115

    
3116
class LURenameInstance(LogicalUnit):
3117
  """Rename an instance.
3118

3119
  """
3120
  HPATH = "instance-rename"
3121
  HTYPE = constants.HTYPE_INSTANCE
3122
  _OP_REQP = ["instance_name", "new_name"]
3123

    
3124
  def BuildHooksEnv(self):
3125
    """Build hooks env.
3126

3127
    This runs on master, primary and secondary nodes of the instance.
3128

3129
    """
3130
    env = _BuildInstanceHookEnvByObject(self, self.instance)
3131
    env["INSTANCE_NEW_NAME"] = self.op.new_name
3132
    nl = [self.cfg.GetMasterNode()] + list(self.instance.all_nodes)
3133
    return env, nl, nl
3134

    
3135
  def CheckPrereq(self):
3136
    """Check prerequisites.
3137

3138
    This checks that the instance is in the cluster and is not running.
3139

3140
    """
3141
    instance = self.cfg.GetInstanceInfo(
3142
      self.cfg.ExpandInstanceName(self.op.instance_name))
3143
    if instance is None:
3144
      raise errors.OpPrereqError("Instance '%s' not known" %
3145
                                 self.op.instance_name)
3146
    _CheckNodeOnline(self, instance.primary_node)
3147

    
3148
    if instance.admin_up:
3149
      raise errors.OpPrereqError("Instance '%s' is marked to be up" %
3150
                                 self.op.instance_name)
3151
    remote_info = self.rpc.call_instance_info(instance.primary_node,
3152
                                              instance.name,
3153
                                              instance.hypervisor)
3154
    remote_info.Raise()
3155
    if remote_info.data:
3156
      raise errors.OpPrereqError("Instance '%s' is running on the node %s" %
3157
                                 (self.op.instance_name,
3158
                                  instance.primary_node))
3159
    self.instance = instance
3160

    
3161
    # new name verification
3162
    name_info = utils.HostInfo(self.op.new_name)
3163

    
3164
    self.op.new_name = new_name = name_info.name
3165
    instance_list = self.cfg.GetInstanceList()
3166
    if new_name in instance_list:
3167
      raise errors.OpPrereqError("Instance '%s' is already in the cluster" %
3168
                                 new_name)
3169

    
3170
    if not getattr(self.op, "ignore_ip", False):
3171
      if utils.TcpPing(name_info.ip, constants.DEFAULT_NODED_PORT):
3172
        raise errors.OpPrereqError("IP %s of instance %s already in use" %
3173
                                   (name_info.ip, new_name))
3174

    
3175

    
3176
  def Exec(self, feedback_fn):
3177
    """Reinstall the instance.
3178

3179
    """
3180
    inst = self.instance
3181
    old_name = inst.name
3182

    
3183
    if inst.disk_template == constants.DT_FILE:
3184
      old_file_storage_dir = os.path.dirname(inst.disks[0].logical_id[1])
3185

    
3186
    self.cfg.RenameInstance(inst.name, self.op.new_name)
3187
    # Change the instance lock. This is definitely safe while we hold the BGL
3188
    self.context.glm.remove(locking.LEVEL_INSTANCE, old_name)
3189
    self.context.glm.add(locking.LEVEL_INSTANCE, self.op.new_name)
3190

    
3191
    # re-read the instance from the configuration after rename
3192
    inst = self.cfg.GetInstanceInfo(self.op.new_name)
3193

    
3194
    if inst.disk_template == constants.DT_FILE:
3195
      new_file_storage_dir = os.path.dirname(inst.disks[0].logical_id[1])
3196
      result = self.rpc.call_file_storage_dir_rename(inst.primary_node,
3197
                                                     old_file_storage_dir,
3198
                                                     new_file_storage_dir)
3199
      result.Raise()
3200
      if not result.data:
3201
        raise errors.OpExecError("Could not connect to node '%s' to rename"
3202
                                 " directory '%s' to '%s' (but the instance"
3203
                                 " has been renamed in Ganeti)" % (
3204
                                 inst.primary_node, old_file_storage_dir,
3205
                                 new_file_storage_dir))
3206

    
3207
      if not result.data[0]:
3208
        raise errors.OpExecError("Could not rename directory '%s' to '%s'"
3209
                                 " (but the instance has been renamed in"
3210
                                 " Ganeti)" % (old_file_storage_dir,
3211
                                               new_file_storage_dir))
3212

    
3213
    _StartInstanceDisks(self, inst, None)
3214
    try:
3215
      result = self.rpc.call_instance_run_rename(inst.primary_node, inst,
3216
                                                 old_name)
3217
      msg = result.RemoteFailMsg()
3218
      if msg:
3219
        msg = ("Could not run OS rename script for instance %s on node %s"
3220
               " (but the instance has been renamed in Ganeti): %s" %
3221
               (inst.name, inst.primary_node, msg))
3222
        self.proc.LogWarning(msg)
3223
    finally:
3224
      _ShutdownInstanceDisks(self, inst)
3225

    
3226

    
3227
class LURemoveInstance(LogicalUnit):
3228
  """Remove an instance.
3229

3230
  """
3231
  HPATH = "instance-remove"
3232
  HTYPE = constants.HTYPE_INSTANCE
3233
  _OP_REQP = ["instance_name", "ignore_failures"]
3234
  REQ_BGL = False
3235

    
3236
  def ExpandNames(self):
3237
    self._ExpandAndLockInstance()
3238
    self.needed_locks[locking.LEVEL_NODE] = []
3239
    self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
3240

    
3241
  def DeclareLocks(self, level):
3242
    if level == locking.LEVEL_NODE:
3243
      self._LockInstancesNodes()
3244

    
3245
  def BuildHooksEnv(self):
3246
    """Build hooks env.
3247

3248
    This runs on master, primary and secondary nodes of the instance.
3249

3250
    """
3251
    env = _BuildInstanceHookEnvByObject(self, self.instance)
3252
    nl = [self.cfg.GetMasterNode()]
3253
    return env, nl, nl
3254

    
3255
  def CheckPrereq(self):
3256
    """Check prerequisites.
3257

3258
    This checks that the instance is in the cluster.
3259

3260
    """
3261
    self.instance = self.cfg.GetInstanceInfo(self.op.instance_name)
3262
    assert self.instance is not None, \
3263
      "Cannot retrieve locked instance %s" % self.op.instance_name
3264

    
3265
  def Exec(self, feedback_fn):
3266
    """Remove the instance.
3267

3268
    """
3269
    instance = self.instance
3270
    logging.info("Shutting down instance %s on node %s",
3271
                 instance.name, instance.primary_node)
3272

    
3273
    result = self.rpc.call_instance_shutdown(instance.primary_node, instance)
3274
    msg = result.RemoteFailMsg()
3275
    if msg:
3276
      if self.op.ignore_failures:
3277
        feedback_fn("Warning: can't shutdown instance: %s" % msg)
3278
      else:
3279
        raise errors.OpExecError("Could not shutdown instance %s on"
3280
                                 " node %s: %s" %
3281
                                 (instance.name, instance.primary_node, msg))
3282

    
3283
    logging.info("Removing block devices for instance %s", instance.name)
3284

    
3285
    if not _RemoveDisks(self, instance):
3286
      if self.op.ignore_failures:
3287
        feedback_fn("Warning: can't remove instance's disks")
3288
      else:
3289
        raise errors.OpExecError("Can't remove instance's disks")
3290

    
3291
    logging.info("Removing instance %s out of cluster config", instance.name)
3292

    
3293
    self.cfg.RemoveInstance(instance.name)
3294
    self.remove_locks[locking.LEVEL_INSTANCE] = instance.name
3295

    
3296

    
3297
class LUQueryInstances(NoHooksLU):
3298
  """Logical unit for querying instances.
3299

3300
  """
3301
  _OP_REQP = ["output_fields", "names", "use_locking"]
3302
  REQ_BGL = False
3303
  _FIELDS_STATIC = utils.FieldSet(*["name", "os", "pnode", "snodes",
3304
                                    "admin_state",
3305
                                    "disk_template", "ip", "mac", "bridge",
3306
                                    "sda_size", "sdb_size", "vcpus", "tags",
3307
                                    "network_port", "beparams",
3308
                                    r"(disk)\.(size)/([0-9]+)",
3309
                                    r"(disk)\.(sizes)", "disk_usage",
3310
                                    r"(nic)\.(mac|ip|bridge)/([0-9]+)",
3311
                                    r"(nic)\.(macs|ips|bridges)",
3312
                                    r"(disk|nic)\.(count)",
3313
                                    "serial_no", "hypervisor", "hvparams",] +
3314
                                  ["hv/%s" % name
3315
                                   for name in constants.HVS_PARAMETERS] +
3316
                                  ["be/%s" % name
3317
                                   for name in constants.BES_PARAMETERS])
3318
  _FIELDS_DYNAMIC = utils.FieldSet("oper_state", "oper_ram", "status")
3319

    
3320

    
3321
  def ExpandNames(self):
3322
    _CheckOutputFields(static=self._FIELDS_STATIC,
3323
                       dynamic=self._FIELDS_DYNAMIC,
3324
                       selected=self.op.output_fields)
3325

    
3326
    self.needed_locks = {}
3327
    self.share_locks[locking.LEVEL_INSTANCE] = 1
3328
    self.share_locks[locking.LEVEL_NODE] = 1
3329

    
3330
    if self.op.names:
3331
      self.wanted = _GetWantedInstances(self, self.op.names)
3332
    else:
3333
      self.wanted = locking.ALL_SET
3334

    
3335
    self.do_node_query = self._FIELDS_STATIC.NonMatching(self.op.output_fields)
3336
    self.do_locking = self.do_node_query and self.op.use_locking
3337
    if self.do_locking:
3338
      self.needed_locks[locking.LEVEL_INSTANCE] = self.wanted
3339
      self.needed_locks[locking.LEVEL_NODE] = []
3340
      self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
3341

    
3342
  def DeclareLocks(self, level):
3343
    if level == locking.LEVEL_NODE and self.do_locking:
3344
      self._LockInstancesNodes()
3345

    
3346
  def CheckPrereq(self):
3347
    """Check prerequisites.
3348

3349
    """
3350
    pass
3351

    
3352
  def Exec(self, feedback_fn):
3353
    """Computes the list of nodes and their attributes.
3354

3355
    """
3356
    all_info = self.cfg.GetAllInstancesInfo()
3357
    if self.wanted == locking.ALL_SET:
3358
      # caller didn't specify instance names, so ordering is not important
3359
      if self.do_locking:
3360
        instance_names = self.acquired_locks[locking.LEVEL_INSTANCE]
3361
      else:
3362
        instance_names = all_info.keys()
3363
      instance_names = utils.NiceSort(instance_names)
3364
    else:
3365
      # caller did specify names, so we must keep the ordering
3366
      if self.do_locking:
3367
        tgt_set = self.acquired_locks[locking.LEVEL_INSTANCE]
3368
      else:
3369
        tgt_set = all_info.keys()
3370
      missing = set(self.wanted).difference(tgt_set)
3371
      if missing:
3372
        raise errors.OpExecError("Some instances were removed before"
3373
                                 " retrieving their data: %s" % missing)
3374
      instance_names = self.wanted
3375

    
3376
    instance_list = [all_info[iname] for iname in instance_names]
3377

    
3378
    # begin data gathering
3379

    
3380
    nodes = frozenset([inst.primary_node for inst in instance_list])
3381
    hv_list = list(set([inst.hypervisor for inst in instance_list]))
3382

    
3383
    bad_nodes = []
3384
    off_nodes = []
3385
    if self.do_node_query:
3386
      live_data = {}
3387
      node_data = self.rpc.call_all_instances_info(nodes, hv_list)
3388
      for name in nodes:
3389
        result = node_data[name]
3390
        if result.offline:
3391
          # offline nodes will be in both lists
3392
          off_nodes.append(name)
3393
        if result.failed:
3394
          bad_nodes.append(name)
3395
        else:
3396
          if result.data:
3397
            live_data.update(result.data)
3398
            # else no instance is alive
3399
    else:
3400
      live_data = dict([(name, {}) for name in instance_names])
3401

    
3402
    # end data gathering
3403

    
3404
    HVPREFIX = "hv/"
3405
    BEPREFIX = "be/"
3406
    output = []
3407
    for instance in instance_list:
3408
      iout = []
3409
      i_hv = self.cfg.GetClusterInfo().FillHV(instance)
3410
      i_be = self.cfg.GetClusterInfo().FillBE(instance)
3411
      for field in self.op.output_fields:
3412
        st_match = self._FIELDS_STATIC.Matches(field)
3413
        if field == "name":
3414
          val = instance.name
3415
        elif field == "os":
3416
          val = instance.os
3417
        elif field == "pnode":
3418
          val = instance.primary_node
3419
        elif field == "snodes":
3420
          val = list(instance.secondary_nodes)
3421
        elif field == "admin_state":
3422
          val = instance.admin_up
3423
        elif field == "oper_state":
3424
          if instance.primary_node in bad_nodes:
3425
            val = None
3426
          else:
3427
            val = bool(live_data.get(instance.name))
3428
        elif field == "status":
3429
          if instance.primary_node in off_nodes:
3430
            val = "ERROR_nodeoffline"
3431
          elif instance.primary_node in bad_nodes:
3432
            val = "ERROR_nodedown"
3433
          else:
3434
            running = bool(live_data.get(instance.name))
3435
            if running:
3436
              if instance.admin_up:
3437
                val = "running"
3438
              else:
3439
                val = "ERROR_up"
3440
            else:
3441
              if instance.admin_up:
3442
                val = "ERROR_down"
3443
              else:
3444
                val = "ADMIN_down"
3445
        elif field == "oper_ram":
3446
          if instance.primary_node in bad_nodes:
3447
            val = None
3448
          elif instance.name in live_data:
3449
            val = live_data[instance.name].get("memory", "?")
3450
          else:
3451
            val = "-"
3452
        elif field == "disk_template":
3453
          val = instance.disk_template
3454
        elif field == "ip":
3455
          val = instance.nics[0].ip
3456
        elif field == "bridge":
3457
          val = instance.nics[0].bridge
3458
        elif field == "mac":
3459
          val = instance.nics[0].mac
3460
        elif field == "sda_size" or field == "sdb_size":
3461
          idx = ord(field[2]) - ord('a')
3462
          try:
3463
            val = instance.FindDisk(idx).size
3464
          except errors.OpPrereqError:
3465
            val = None
3466
        elif field == "disk_usage": # total disk usage per node
3467
          disk_sizes = [{'size': disk.size} for disk in instance.disks]
3468
          val = _ComputeDiskSize(instance.disk_template, disk_sizes)
3469
        elif field == "tags":
3470
          val = list(instance.GetTags())
3471
        elif field == "serial_no":
3472
          val = instance.serial_no
3473
        elif field == "network_port":
3474
          val = instance.network_port
3475
        elif field == "hypervisor":
3476
          val = instance.hypervisor
3477
        elif field == "hvparams":
3478
          val = i_hv
3479
        elif (field.startswith(HVPREFIX) and
3480
              field[len(HVPREFIX):] in constants.HVS_PARAMETERS):
3481
          val = i_hv.get(field[len(HVPREFIX):], None)
3482
        elif field == "beparams":
3483
          val = i_be
3484
        elif (field.startswith(BEPREFIX) and
3485
              field[len(BEPREFIX):] in constants.BES_PARAMETERS):
3486
          val = i_be.get(field[len(BEPREFIX):], None)
3487
        elif st_match and st_match.groups():
3488
          # matches a variable list
3489
          st_groups = st_match.groups()
3490
          if st_groups and st_groups[0] == "disk":
3491
            if st_groups[1] == "count":
3492
              val = len(instance.disks)
3493
            elif st_groups[1] == "sizes":
3494
              val = [disk.size for disk in instance.disks]
3495
            elif st_groups[1] == "size":
3496
              try:
3497
                val = instance.FindDisk(st_groups[2]).size
3498
              except errors.OpPrereqError:
3499
                val = None
3500
            else:
3501
              assert False, "Unhandled disk parameter"
3502
          elif st_groups[0] == "nic":
3503
            if st_groups[1] == "count":
3504
              val = len(instance.nics)
3505
            elif st_groups[1] == "macs":
3506
              val = [nic.mac for nic in instance.nics]
3507
            elif st_groups[1] == "ips":
3508
              val = [nic.ip for nic in instance.nics]
3509
            elif st_groups[1] == "bridges":
3510
              val = [nic.bridge for nic in instance.nics]
3511
            else:
3512
              # index-based item
3513
              nic_idx = int(st_groups[2])
3514
              if nic_idx >= len(instance.nics):
3515
                val = None
3516
              else:
3517
                if st_groups[1] == "mac":
3518
                  val = instance.nics[nic_idx].mac
3519
                elif st_groups[1] == "ip":
3520
                  val = instance.nics[nic_idx].ip
3521
                elif st_groups[1] == "bridge":
3522
                  val = instance.nics[nic_idx].bridge
3523
                else:
3524
                  assert False, "Unhandled NIC parameter"
3525
          else:
3526
            assert False, "Unhandled variable parameter"
3527
        else:
3528
          raise errors.ParameterError(field)
3529
        iout.append(val)
3530
      output.append(iout)
3531

    
3532
    return output
3533

    
3534

    
3535
class LUFailoverInstance(LogicalUnit):
3536
  """Failover an instance.
3537

3538
  """
3539
  HPATH = "instance-failover"
3540
  HTYPE = constants.HTYPE_INSTANCE
3541
  _OP_REQP = ["instance_name", "ignore_consistency"]
3542
  REQ_BGL = False
3543

    
3544
  def ExpandNames(self):
3545
    self._ExpandAndLockInstance()
3546
    self.needed_locks[locking.LEVEL_NODE] = []
3547
    self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
3548

    
3549
  def DeclareLocks(self, level):
3550
    if level == locking.LEVEL_NODE:
3551
      self._LockInstancesNodes()
3552

    
3553
  def BuildHooksEnv(self):
3554
    """Build hooks env.
3555

3556
    This runs on master, primary and secondary nodes of the instance.
3557

3558
    """
3559
    env = {
3560
      "IGNORE_CONSISTENCY": self.op.ignore_consistency,
3561
      }
3562
    env.update(_BuildInstanceHookEnvByObject(self, self.instance))
3563
    nl = [self.cfg.GetMasterNode()] + list(self.instance.secondary_nodes)
3564
    return env, nl, nl
3565

    
3566
  def CheckPrereq(self):
3567
    """Check prerequisites.
3568

3569
    This checks that the instance is in the cluster.
3570

3571
    """
3572
    self.instance = instance = self.cfg.GetInstanceInfo(self.op.instance_name)
3573
    assert self.instance is not None, \
3574
      "Cannot retrieve locked instance %s" % self.op.instance_name
3575

    
3576
    bep = self.cfg.GetClusterInfo().FillBE(instance)
3577
    if instance.disk_template not in constants.DTS_NET_MIRROR:
3578
      raise errors.OpPrereqError("Instance's disk layout is not"
3579
                                 " network mirrored, cannot failover.")
3580

    
3581
    secondary_nodes = instance.secondary_nodes
3582
    if not secondary_nodes:
3583
      raise errors.ProgrammerError("no secondary node but using "
3584
                                   "a mirrored disk template")
3585

    
3586
    target_node = secondary_nodes[0]
3587
    _CheckNodeOnline(self, target_node)
3588
    _CheckNodeNotDrained(self, target_node)
3589
    # check memory requirements on the secondary node
3590
    _CheckNodeFreeMemory(self, target_node, "failing over instance %s" %
3591
                         instance.name, bep[constants.BE_MEMORY],
3592
                         instance.hypervisor)
3593

    
3594
    # check bridge existance
3595
    brlist = [nic.bridge for nic in instance.nics]
3596
    result = self.rpc.call_bridges_exist(target_node, brlist)
3597
    result.Raise()
3598
    if not result.data:
3599
      raise errors.OpPrereqError("One or more target bridges %s does not"
3600
                                 " exist on destination node '%s'" %
3601
                                 (brlist, target_node))
3602

    
3603
  def Exec(self, feedback_fn):
3604
    """Failover an instance.
3605

3606
    The failover is done by shutting it down on its present node and
3607
    starting it on the secondary.
3608

3609
    """
3610
    instance = self.instance
3611

    
3612
    source_node = instance.primary_node
3613
    target_node = instance.secondary_nodes[0]
3614

    
3615
    feedback_fn("* checking disk consistency between source and target")
3616
    for dev in instance.disks:
3617
      # for drbd, these are drbd over lvm
3618
      if not _CheckDiskConsistency(self, dev, target_node, False):
3619
        if instance.admin_up and not self.op.ignore_consistency:
3620
          raise errors.OpExecError("Disk %s is degraded on target node,"
3621
                                   " aborting failover." % dev.iv_name)
3622

    
3623
    feedback_fn("* shutting down instance on source node")
3624
    logging.info("Shutting down instance %s on node %s",
3625
                 instance.name, source_node)
3626

    
3627
    result = self.rpc.call_instance_shutdown(source_node, instance)
3628
    msg = result.RemoteFailMsg()
3629
    if msg:
3630
      if self.op.ignore_consistency:
3631
        self.proc.LogWarning("Could not shutdown instance %s on node %s."
3632
                             " Proceeding anyway. Please make sure node"
3633
                             " %s is down. Error details: %s",
3634
                             instance.name, source_node, source_node, msg)
3635
      else:
3636
        raise errors.OpExecError("Could not shutdown instance %s on"
3637
                                 " node %s: %s" %
3638
                                 (instance.name, source_node, msg))
3639

    
3640
    feedback_fn("* deactivating the instance's disks on source node")
3641
    if not _ShutdownInstanceDisks(self, instance, ignore_primary=True):
3642
      raise errors.OpExecError("Can't shut down the instance's disks.")
3643

    
3644
    instance.primary_node = target_node
3645
    # distribute new instance config to the other nodes
3646
    self.cfg.Update(instance)
3647

    
3648
    # Only start the instance if it's marked as up
3649
    if instance.admin_up:
3650
      feedback_fn("* activating the instance's disks on target node")
3651
      logging.info("Starting instance %s on node %s",
3652
                   instance.name, target_node)
3653

    
3654
      disks_ok, dummy = _AssembleInstanceDisks(self, instance,
3655
                                               ignore_secondaries=True)
3656
      if not disks_ok:
3657
        _ShutdownInstanceDisks(self, instance)
3658
        raise errors.OpExecError("Can't activate the instance's disks")
3659

    
3660
      feedback_fn("* starting the instance on the target node")
3661
      result = self.rpc.call_instance_start(target_node, instance, None, None)
3662
      msg = result.RemoteFailMsg()
3663
      if msg:
3664
        _ShutdownInstanceDisks(self, instance)
3665
        raise errors.OpExecError("Could not start instance %s on node %s: %s" %
3666
                                 (instance.name, target_node, msg))
3667

    
3668

    
3669
class LUMigrateInstance(LogicalUnit):
3670
  """Migrate an instance.
3671

3672
  This is migration without shutting down, compared to the failover,
3673
  which is done with shutdown.
3674

3675
  """
3676
  HPATH = "instance-migrate"
3677
  HTYPE = constants.HTYPE_INSTANCE
3678
  _OP_REQP = ["instance_name", "live", "cleanup"]
3679

    
3680
  REQ_BGL = False
3681

    
3682
  def ExpandNames(self):
3683
    self._ExpandAndLockInstance()
3684
    self.needed_locks[locking.LEVEL_NODE] = []
3685
    self.recalculate_locks[locking.LEVEL_NODE] = constants.LOCKS_REPLACE
3686

    
3687
  def DeclareLocks(self, level):
3688
    if level == locking.LEVEL_NODE:
3689
      self._LockInstancesNodes()
3690

    
3691
  def BuildHooksEnv(self):
3692
    """Build hooks env.
3693

3694
    This runs on master, primary and secondary nodes of the instance.
3695

3696
    """
3697
    env = _BuildInstanceHookEnvByObject(self, self.instance)
3698
    env["MIGRATE_LIVE"] = self.op.live
3699
    env["MIGRATE_CLEANUP"] = self.op.cleanup
3700
    nl = [self.cfg.GetMasterNode()] + list(self.instance.secondary_nodes)
3701
    return env, nl, nl
3702

    
3703
  def CheckPrereq(self):
3704
    """Check prerequisites.
3705

3706
    This checks that the instance is in the cluster.
3707

3708
    """
3709
    instance = self.cfg.GetInstanceInfo(
3710
      self.cfg.ExpandInstanceName(self.op.instance_name))
3711
    if instance is None:
3712
      raise errors.OpPrereqError("Instance '%s' not known" %
3713
                                 self.op.instance_name)
3714

    
3715
    if instance.disk_template != constants.DT_DRBD8:
3716
      raise errors.OpPrereqError("Instance's disk layout is not"
3717
                                 " drbd8, cannot migrate.")
3718

    
3719
    secondary_nodes = instance.secondary_nodes
3720
    if not secondary_nodes:
3721
      raise errors.ConfigurationError("No secondary node but using"
3722
                                      " drbd8 disk template")
3723

    
3724
    i_be = self.cfg.GetClusterInfo().FillBE(instance)
3725

    
3726
    target_node = secondary_nodes[0]
3727
    # check memory requirements on the secondary node
3728
    _CheckNodeFreeMemory(self, target_node, "migrating instance %s" %
3729
                         instance.name, i_be[constants.BE_MEMORY],
3730
                         instance.hypervisor)
3731

    
3732
    # check bridge existance
3733
    brlist = [nic.bridge for nic in instance.nics]
3734
    result = self.rpc.call_bridges_exist(target_node, brlist)
3735
    if result.failed or not result.data:
3736
      raise errors.OpPrereqError("One or more target bridges %s does not"
3737
                                 " exist on destination node '%s'" %
3738
                                 (brlist, target_node))
3739

    
3740
    if not self.op.cleanup:
3741
      _CheckNodeNotDrained(self, target_node)
3742
      result = self.rpc.call_instance_migratable(instance.primary_node,
3743
                                                 instance)
3744
      msg = result.RemoteFailMsg()
3745
      if msg:
3746
        raise errors.OpPrereqError("Can't migrate: %s - please use failover" %
3747
                                   msg)
3748

    
3749
    self.instance = instance
3750

    
3751
  def _WaitUntilSync(self):
3752
    """Poll with custom rpc for disk sync.
3753

3754
    This uses our own step-based rpc call.
3755

3756
    """
3757
    self.feedback_fn("* wait until resync is done")
3758
    all_done = False
3759
    while not all_done:
3760
      all_done = True
3761
      result = self.rpc.call_drbd_wait_sync(self.all_nodes,
3762
                                            self.nodes_ip,
3763
                                            self.instance.disks)
3764
      min_percent = 100
3765
      for node, nres in result.items():
3766
        msg = nres.RemoteFailMsg()
3767
        if msg:
3768
          raise errors.OpExecError("Cannot resync disks on node %s: %s" %
3769
                                   (node, msg))
3770
        node_done, node_percent = nres.payload
3771
        all_done = all_done and node_done
3772
        if node_percent is not None:
3773
          min_percent = min(min_percent, node_percent)
3774
      if not all_done:
3775
        if min_percent < 100:
3776
          self.feedback_fn("   - progress: %.1f%%" % min_percent)
3777
        time.sleep(2)
3778

    
3779
  def _EnsureSecondary(self, node):
3780
    """Demote a node to secondary.
3781

3782
    """
3783
    self.feedback_fn("* switching node %s to secondary mode" % node)
3784

    
3785
    for dev in self.instance.disks:
3786
      self.cfg.SetDiskID(dev, node)
3787

    
3788
    result = self.rpc.call_blockdev_close(node, self.instance.name,
3789
                                          self.instance.disks)
3790
    msg = result.RemoteFailMsg()
3791
    if msg:
3792
      raise errors.OpExecError("Cannot change disk to secondary on node %s,"
3793
                               " error %s" % (node, msg))
3794

    
3795
  def _GoStandalone(self):
3796
    """Disconnect from the network.
3797

3798
    """
3799
    self.feedback_fn("* changing into standalone mode")
3800
    result = self.rpc.call_drbd_disconnect_net(self.all_nodes, self.nodes_ip,
3801
                                               self.instance.disks)
3802
    for node, nres in result.items():
3803
      msg = nres.RemoteFailMsg()
3804
      if msg:
3805
        raise errors.OpExecError("Cannot disconnect disks node %s,"
3806
                                 " error %s" % (node, msg))
3807

    
3808
  def _GoReconnect(self, multimaster):
3809
    """Reconnect to the network.
3810

3811
    """
3812
    if multimaster:
3813
      msg = "dual-master"
3814
    else:
3815
      msg = "single-master"
3816
    self.feedback_fn("* changing disks into %s mode" % msg)
3817
    result = self.rpc.call_drbd_attach_net(self.all_nodes, self.nodes_ip,
3818
                                           self.instance.disks,
3819
                                           self.instance.name, multimaster)
3820
    for node, nres in result.items():
3821
      msg = nres.RemoteFailMsg()
3822
      if msg:
3823
        raise errors.OpExecError("Cannot change disks config on node %s,"
3824
                                 " error: %s" % (node, msg))
3825

    
3826
  def _ExecCleanup(self):
3827
    """Try to cleanup after a failed migration.
3828

3829
    The cleanup is done by:
3830
      - check that the instance is running only on one node
3831
        (and update the config if needed)
3832
      - change disks on its secondary node to secondary
3833
      - wait until disks are fully synchronized
3834
      - disconnect from the network
3835
      - change disks into single-master mode
3836
      - wait again until disks are fully synchronized
3837

3838
    """
3839
    instance = self.instance
3840
    target_node = self.target_node
3841
    source_node = self.source_node
3842

    
3843
    # check running on only one node
3844
    self.feedback_fn("* checking where the instance actually runs"
3845
                     " (if this hangs, the hypervisor might be in"
3846
                     " a bad state)")
3847
    ins_l = self.rpc.call_instance_list(self.all_nodes, [instance.hypervisor])
3848
    for node, result in ins_l.items():
3849
      result.Raise()
3850
      if not isinstance(result.data, list):
3851
        raise errors.OpExecError("Can't contact node '%s'" % node)
3852

    
3853
    runningon_source = instance.name in ins_l[source_node].data
3854
    runningon_target = instance.name in ins_l[target_node].data
3855

    
3856
    if runningon_source and runningon_target:
3857
      raise errors.OpExecError("Instance seems to be running on two nodes,"
3858
                               " or the hypervisor is confused. You will have"
3859
                               " to ensure manually that it runs only on one"
3860
                               " and restart this operation.")
3861

    
3862
    if not (runningon_source or runningon_target):
3863
      raise errors.OpExecError("Instance does not seem to be running at all."
3864
                               " In this case, it's safer to repair by"
3865
                               " running 'gnt-instance stop' to ensure disk"
3866
                               " shutdown, and then restarting it.")
3867

    
3868
    if runningon_target:
3869
      # the migration has actually succeeded, we need to update the config
3870
      self.feedback_fn("* instance running on secondary node (%s),"
3871
                       " updating config" % target_node)
3872
      instance.primary_node = target_node
3873
      self.cfg.Update(instance)
3874
      demoted_node = source_node
3875
    else:
3876
      self.feedback_fn("* instance confirmed to be running on its"
3877
                       " primary node (%s)" % source_node)
3878
      demoted_node = target_node
3879

    
3880
    self._EnsureSecondary(demoted_node)
3881
    try:
3882
      self._WaitUntilSync()
3883
    except errors.OpExecError:
3884
      # we ignore here errors, since if the device is standalone, it
3885
      # won't be able to sync
3886
      pass
3887
    self._GoStandalone()
3888
    self._GoReconnect(False)
3889
    self._WaitUntilSync()
3890

    
3891
    self.feedback_fn("* done")
3892

    
3893
  def _RevertDiskStatus(self):
3894
    """Try to revert the disk status after a failed migration.
3895

3896
    """
3897
    target_node = self.target_node
3898
    try:
3899
      self._EnsureSecondary(target_node)
3900
      self._GoStandalone()
3901
      self._GoReconnect(False)
3902
      self._WaitUntilSync()
3903
    except errors.OpExecError, err:
3904
      self.LogWarning("Migration failed and I can't reconnect the"
3905
                      " drives: error '%s'\n"
3906
                      "Please look and recover the instance status" %
3907
                      str(err))
3908

    
3909
  def _AbortMigration(self):
3910
    """Call the hypervisor code to abort a started migration.
3911

3912
    """
3913
    instance = self.instance
3914
    target_node = self.target_node
3915
    migration_info = self.migration_info
3916

    
3917
    abort_result = self.rpc.call_finalize_migration(target_node,
3918
                                                    instance,
3919
                                                    migration_info,
3920
                                                    False)
3921
    abort_msg = abort_result.RemoteFailMsg()
3922
    if abort_msg:
3923
      logging.error("Aborting migration failed on target node %s: %s" %
3924
                    (target_node, abort_msg))
3925
      # Don't raise an exception here, as we stil have to try to revert the
3926
      # disk status, even if this step failed.
3927

    
3928
  def _ExecMigration(self):
3929
    """Migrate an instance.
3930

3931
    The migrate is done by:
3932
      - change the disks into dual-master mode
3933
      - wait until disks are fully synchronized again
3934
      - migrate the instance
3935
      - change disks on the new secondary node (the old primary) to secondary
3936
      - wait until disks are fully synchronized
3937
      - change disks into single-master mode
3938

3939
    """
3940
    instance = self.instance
3941
    target_node = self.target_node
3942
    source_node = self.source_node
3943

    
3944
    self.feedback_fn("* checking disk consistency between source and target")
3945
    for dev in instance.disks:
3946
      if not _CheckDiskConsistency(self, dev, target_node, False):
3947
        raise errors.OpExecError("Disk %s is degraded or not fully"
3948
                                 " synchronized on target node,"
3949
                                 " aborting migrate." % dev.iv_name)
3950

    
3951
    # First get the migration information from the remote node
3952
    result = self.rpc.call_migration_info(source_node, instance)
3953
    msg = result.RemoteFailMsg()
3954
    if msg:
3955
      log_err = ("Failed fetching source migration information from %s: %s" %
3956
                 (source_node, msg))
3957
      logging.error(log_err)
3958
      raise errors.OpExecError(log_err)
3959

    
3960
    self.migration_info = migration_info = result.payload
3961

    
3962
    # Then switch the disks to master/master mode
3963
    self._EnsureSecondary(target_node)
3964
    self._GoStandalone()
3965
    self._GoReconnect(True)
3966
    self._WaitUntilSync()
3967

    
3968
    self.feedback_fn("* preparing %s to accept the instance" % target_node)
3969
    result = self.rpc.call_accept_instance(target_node,
3970
                                           instance,
3971
                                           migration_info,
3972
                                           self.nodes_ip[target_node])
3973

    
3974
    msg = result.RemoteFailMsg()
3975
    if msg:
3976
      logging.error("Instance pre-migration failed, trying to revert"
3977
                    " disk status: %s", msg)
3978
      self._AbortMigration()
3979
      self._RevertDiskStatus()
3980
      raise errors.OpExecError("Could not pre-migrate instance %s: %s" %
3981
                               (instance.name, msg))
3982

    
3983
    self.feedback_fn("* migrating instance to %s" % target_node)
3984
    time.sleep(10)
3985
    result =