cmdlib.py 170 KB
Newer Older
Iustin Pop's avatar
Iustin Pop committed
1
#
Iustin Pop's avatar
Iustin Pop committed
2 3
#

4
# Copyright (C) 2006, 2007, 2008 Google Inc.
Iustin Pop's avatar
Iustin Pop committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


22
"""Module implementing the master-side code."""
Iustin Pop's avatar
Iustin Pop committed
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

# pylint: disable-msg=W0613,W0201

import os
import os.path
import sha
import time
import tempfile
import re
import platform

from ganeti import rpc
from ganeti import ssh
from ganeti import logger
from ganeti import utils
from ganeti import errors
from ganeti import hypervisor
Guido Trotter's avatar
Guido Trotter committed
40
from ganeti import locking
Iustin Pop's avatar
Iustin Pop committed
41 42 43 44 45
from ganeti import config
from ganeti import constants
from ganeti import objects
from ganeti import opcodes
from ganeti import ssconf
46
from ganeti import serializer
47 48


Iustin Pop's avatar
Iustin Pop committed
49
class LogicalUnit(object):
50
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
51 52

  Subclasses must follow these rules:
53 54
    - implement ExpandNames
    - implement CheckPrereq
Iustin Pop's avatar
Iustin Pop committed
55 56 57
    - implement Exec
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
58 59 60
    - optionally redefine their run requirements:
        REQ_MASTER: the LU needs to run on the master node
        REQ_WSSTORE: the LU needs a writable SimpleStore
61
        REQ_BGL: the LU needs to hold the Big Ganeti Lock exclusively
62 63

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
64 65 66 67 68 69

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
  REQ_MASTER = True
70
  REQ_WSSTORE = False
71
  REQ_BGL = True
Iustin Pop's avatar
Iustin Pop committed
72

Guido Trotter's avatar
Guido Trotter committed
73
  def __init__(self, processor, op, context, sstore):
Iustin Pop's avatar
Iustin Pop committed
74 75 76 77 78 79
    """Constructor for LogicalUnit.

    This needs to be overriden in derived classes in order to check op
    validity.

    """
Iustin Pop's avatar
Iustin Pop committed
80
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
81
    self.op = op
Guido Trotter's avatar
Guido Trotter committed
82
    self.cfg = context.cfg
Iustin Pop's avatar
Iustin Pop committed
83
    self.sstore = sstore
Guido Trotter's avatar
Guido Trotter committed
84
    self.context = context
85
    self.needed_locks = None
86 87
    self.__ssh = None

Iustin Pop's avatar
Iustin Pop committed
88 89 90
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
91 92
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
93

Guido Trotter's avatar
Guido Trotter committed
94
    if not self.cfg.IsCluster():
95 96 97 98 99 100 101
      raise errors.OpPrereqError("Cluster not initialized yet,"
                                 " use 'gnt-cluster init' first.")
    if self.REQ_MASTER:
      master = sstore.GetMasterNode()
      if master != utils.HostInfo().name:
        raise errors.OpPrereqError("Commands must be run on the master"
                                   " node %s" % master)
Iustin Pop's avatar
Iustin Pop committed
102

103 104 105 106 107
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
108
      self.__ssh = ssh.SshRunner(self.sstore)
109 110 111 112
    return self.__ssh

  ssh = property(fget=__GetSSH)

113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
  def ExpandNames(self):
    """Expand names for this LU.

    This method is called before starting to execute the opcode, and it should
    update all the parameters of the opcode to their canonical form (e.g. a
    short node name must be fully expanded after this method has successfully
    completed). This way locking, hooks, logging, ecc. can work correctly.

    LUs which implement this method must also populate the self.needed_locks
    member, as a dict with lock levels as keys, and a list of needed lock names
    as values. Rules:
      - Use an empty dict if you don't need any lock
      - If you don't need any lock at a particular level omit that level
      - Don't put anything for the BGL level
      - If you want all locks at a level use None as a value
        (this reflects what LockSet does, and will be replaced before
        CheckPrereq with the full list of nodes that have been locked)

    Examples:
    # Acquire all nodes and one instance
    self.needed_locks = {
      locking.LEVEL_NODE: None,
      locking.LEVEL_INSTANCES: ['instance1.example.tld'],
    }
    # Acquire just two nodes
    self.needed_locks = {
      locking.LEVEL_NODE: ['node1.example.tld', 'node2.example.tld'],
    }
    # Acquire no locks
    self.needed_locks = {} # No, you can't leave it to the default value None

    """
    # The implementation of this method is mandatory only if the new LU is
    # concurrent, so that old LUs don't need to be changed all at the same
    # time.
    if self.REQ_BGL:
      self.needed_locks = {} # Exclusive LUs don't need locks.
    else:
      raise NotImplementedError

Iustin Pop's avatar
Iustin Pop committed
153 154 155 156 157 158 159 160 161 162 163 164
  def CheckPrereq(self):
    """Check prerequisites for this LU.

    This method should check that the prerequisites for the execution
    of this LU are fulfilled. It can do internode communication, but
    it should be idempotent - no cluster or system changes are
    allowed.

    The method should raise errors.OpPrereqError in case something is
    not fulfilled. Its return value is ignored.

    This method should also update all the parameters of the opcode to
165
    their canonical form if it hasn't been done by ExpandNames before.
Iustin Pop's avatar
Iustin Pop committed
166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193

    """
    raise NotImplementedError

  def Exec(self, feedback_fn):
    """Execute the LU.

    This method should implement the actual work. It should raise
    errors.OpExecError for failures that are somewhat dealt with in
    code, or expected.

    """
    raise NotImplementedError

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

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

    The keys of the dict must not have 'GANETI_' prefixed as this will
    be handled in the hooks runner. Also note additional keys will be
    added by the hooks runner. If the LU doesn't define any
    environment, an empty dict (and not None) should be returned.

194
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
195 196 197 198 199 200 201

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

    """
    raise NotImplementedError

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219
  def HooksCallBack(self, phase, hook_results, feedback_fn, lu_result):
    """Notify the LU about the results of its hooks.

    This method is called every time a hooks phase is executed, and notifies
    the Logical Unit about the hooks' result. The LU can then use it to alter
    its result based on the hooks.  By default the method does nothing and the
    previous result is passed back unchanged but any LU can define it if it
    wants to use the local cluster hook-scripts somehow.

    Args:
      phase: the hooks phase that has just been run
      hooks_results: the results of the multi-node hooks rpc call
      feedback_fn: function to send feedback back to the caller
      lu_result: the previous result this LU had, or None in the PRE phase.

    """
    return lu_result

Iustin Pop's avatar
Iustin Pop committed
220 221 222 223 224 225 226 227 228 229 230 231

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

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

  """
  HPATH = None
  HTYPE = None


232
def _GetWantedNodes(lu, nodes):
233
  """Returns list of checked and expanded node names.
234 235 236 237 238

  Args:
    nodes: List of nodes (strings) or None for all

  """
239
  if not isinstance(nodes, list):
240
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
241 242

  if nodes:
243
    wanted = []
244 245

    for name in nodes:
246
      node = lu.cfg.ExpandNodeName(name)
247
      if node is None:
248
        raise errors.OpPrereqError("No such node name '%s'" % name)
249
      wanted.append(node)
250 251

  else:
252 253
    wanted = lu.cfg.GetNodeList()
  return utils.NiceSort(wanted)
254 255 256


def _GetWantedInstances(lu, instances):
257
  """Returns list of checked and expanded instance names.
258 259 260 261 262 263 264 265 266 267 268 269

  Args:
    instances: List of instances (strings) or None for all

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

  if instances:
    wanted = []

    for name in instances:
270
      instance = lu.cfg.ExpandInstanceName(name)
271 272 273 274 275
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
276 277
    wanted = lu.cfg.GetInstanceList()
  return utils.NiceSort(wanted)
278 279 280


def _CheckOutputFields(static, dynamic, selected):
281 282 283 284 285 286 287 288 289
  """Checks whether all selected fields are valid.

  Args:
    static: Static fields
    dynamic: Dynamic fields

  """
  static_fields = frozenset(static)
  dynamic_fields = frozenset(dynamic)
290

291
  all_fields = static_fields | dynamic_fields
292

293
  if not all_fields.issuperset(selected):
294 295 296
    raise errors.OpPrereqError("Unknown output fields selected: %s"
                               % ",".join(frozenset(selected).
                                          difference(all_fields)))
297 298


299
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
300
                          memory, vcpus, nics):
301 302 303 304
  """Builds instance related env variables for hooks from single variables.

  Args:
    secondary_nodes: List of secondary nodes as strings
305 306
  """
  env = {
307
    "OP_TARGET": name,
308 309 310
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
311
    "INSTANCE_OS_TYPE": os_type,
312 313 314 315 316 317 318
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
319
    for idx, (ip, bridge, mac) in enumerate(nics):
320 321 322 323
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
324
      env["INSTANCE_NIC%d_HWADDR" % idx] = mac
325 326 327 328 329 330 331 332 333
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


def _BuildInstanceHookEnvByObject(instance, override=None):
334 335 336 337 338 339
  """Builds instance related env variables for hooks from an object.

  Args:
    instance: objects.Instance object of instance
    override: dict of values to override
  """
340 341 342 343
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
344
    'os_type': instance.os,
345 346 347
    'status': instance.os,
    'memory': instance.memory,
    'vcpus': instance.vcpus,
348
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
349 350 351 352 353 354
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


355 356 357 358 359 360 361 362 363 364 365 366
def _CheckInstanceBridgesExist(instance):
  """Check that the brigdes needed by an instance exist.

  """
  # check bridges existance
  brlist = [nic.bridge for nic in instance.nics]
  if not rpc.call_bridges_exist(instance.primary_node, brlist):
    raise errors.OpPrereqError("one or more target bridges %s does not"
                               " exist on destination node '%s'" %
                               (brlist, instance.primary_node))


Iustin Pop's avatar
Iustin Pop committed
367 368 369 370 371 372 373 374 375 376 377 378 379 380
class LUDestroyCluster(NoHooksLU):
  """Logical unit for destroying the cluster.

  """
  _OP_REQP = []

  def CheckPrereq(self):
    """Check prerequisites.

    This checks whether the cluster is empty.

    Any errors are signalled by raising errors.OpPrereqError.

    """
381
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
382 383

    nodelist = self.cfg.GetNodeList()
384
    if len(nodelist) != 1 or nodelist[0] != master:
385 386
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
387 388
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
389 390
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
391 392 393 394 395

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

    """
396
    master = self.sstore.GetMasterNode()
397 398
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")
399 400 401
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
402
    rpc.call_node_leave_cluster(master)
Iustin Pop's avatar
Iustin Pop committed
403 404


Guido Trotter's avatar
Guido Trotter committed
405
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
406 407 408
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
409 410
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
411
  _OP_REQP = ["skip_checks"]
Iustin Pop's avatar
Iustin Pop committed
412 413 414 415 416 417 418 419 420 421 422 423 424 425 426

  def _VerifyNode(self, node, file_list, local_cksum, vglist, node_result,
                  remote_version, feedback_fn):
    """Run multiple tests against a node.

    Test list:
      - compares ganeti version
      - checks vg existance and size > 20G
      - checks config file checksum
      - checks ssh to other nodes

    Args:
      node: name of the node to check
      file_list: required list of files
      local_cksum: dictionary of local files and their checksums
427

Iustin Pop's avatar
Iustin Pop committed
428 429 430 431
    """
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
432
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
      return True

    if local_version != remote_version:
      feedback_fn("  - ERROR: sw version mismatch: master %s, node(%s) %s" %
                      (local_version, node, remote_version))
      return True

    # checks vg existance and size > 20G

    bad = False
    if not vglist:
      feedback_fn("  - ERROR: unable to check volume groups on node %s." %
                      (node,))
      bad = True
    else:
448 449
      vgstatus = utils.CheckVolumeGroupSize(vglist, self.cfg.GetVGName(),
                                            constants.MIN_VG_SIZE)
Iustin Pop's avatar
Iustin Pop committed
450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471
      if vgstatus:
        feedback_fn("  - ERROR: %s on node %s" % (vgstatus, node))
        bad = True

    # checks config file checksum
    # checks ssh to any

    if 'filelist' not in node_result:
      bad = True
      feedback_fn("  - ERROR: node hasn't returned file checksum data")
    else:
      remote_cksum = node_result['filelist']
      for file_name in file_list:
        if file_name not in remote_cksum:
          bad = True
          feedback_fn("  - ERROR: file '%s' missing" % file_name)
        elif remote_cksum[file_name] != local_cksum[file_name]:
          bad = True
          feedback_fn("  - ERROR: file '%s' has wrong checksum" % file_name)

    if 'nodelist' not in node_result:
      bad = True
472
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
473 474 475 476
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
477
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
Iustin Pop's avatar
Iustin Pop committed
478
                          (node, node_result['nodelist'][node]))
479 480 481 482 483 484 485 486 487 488 489
    if 'node-net-test' not in node_result:
      bad = True
      feedback_fn("  - ERROR: node hasn't returned node tcp connectivity data")
    else:
      if node_result['node-net-test']:
        bad = True
        nlist = utils.NiceSort(node_result['node-net-test'].keys())
        for node in nlist:
          feedback_fn("  - ERROR: tcp communication with node '%s': %s" %
                          (node, node_result['node-net-test'][node]))

Iustin Pop's avatar
Iustin Pop committed
490 491 492 493 494
    hyp_result = node_result.get('hypervisor', None)
    if hyp_result is not None:
      feedback_fn("  - ERROR: hypervisor verify failure: '%s'" % hyp_result)
    return bad

495 496
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
                      node_instance, feedback_fn):
Iustin Pop's avatar
Iustin Pop committed
497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517
    """Verify an instance.

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

    """
    bad = False

    node_current = instanceconfig.primary_node

    node_vol_should = {}
    instanceconfig.MapLVsByNode(node_vol_should)

    for node in node_vol_should:
      for volume in node_vol_should[node]:
        if node not in node_vol_is or volume not in node_vol_is[node]:
          feedback_fn("  - ERROR: volume %s missing on node %s" %
                          (volume, node))
          bad = True

    if not instanceconfig.status == 'down':
518 519
      if (node_current not in node_instance or
          not instance in node_instance[node_current]):
Iustin Pop's avatar
Iustin Pop committed
520 521 522 523 524 525 526 527 528 529 530
        feedback_fn("  - ERROR: instance %s not running on node %s" %
                        (instance, node_current))
        bad = True

    for node in node_instance:
      if (not node == node_current):
        if instance in node_instance[node]:
          feedback_fn("  - ERROR: instance %s should not run on node %s" %
                          (instance, node))
          bad = True

531
    return bad
Iustin Pop's avatar
Iustin Pop committed
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564

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

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

    """
    bad = False

    for node in node_vol_is:
      for volume in node_vol_is[node]:
        if node not in node_vol_should or volume not in node_vol_should[node]:
          feedback_fn("  - ERROR: volume %s on node %s should not exist" %
                      (volume, node))
          bad = True
    return bad

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

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

    """
    bad = False
    for node in node_instance:
      for runninginstance in node_instance[node]:
        if runninginstance not in instancelist:
          feedback_fn("  - ERROR: instance %s on node %s should not exist" %
                          (runninginstance, node))
          bad = True
    return bad

565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592
  def _VerifyNPlusOneMemory(self, node_info, instance_cfg, feedback_fn):
    """Verify N+1 Memory Resilience.

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

    """
    bad = False

    for node, nodeinfo in node_info.iteritems():
      # This code checks that every node which is now listed as secondary has
      # enough memory to host all instances it is supposed to should a single
      # other node in the cluster fail.
      # FIXME: not ready for failover to an arbitrary node
      # FIXME: does not support file-backed instances
      # WARNING: we currently take into account down instances as well as up
      # ones, considering that even if they're down someone might want to start
      # them even in the event of a node failure.
      for prinode, instances in nodeinfo['sinst-by-pnode'].iteritems():
        needed_mem = 0
        for instance in instances:
          needed_mem += instance_cfg[instance].memory
        if nodeinfo['mfree'] < needed_mem:
          feedback_fn("  - ERROR: not enough memory on node %s to accomodate"
                      " failovers should node %s fail" % (node, prinode))
          bad = True
    return bad

Iustin Pop's avatar
Iustin Pop committed
593 594 595
  def CheckPrereq(self):
    """Check prerequisites.

596 597
    Transform the list of checks we're going to skip into a set and check that
    all its members are valid.
Iustin Pop's avatar
Iustin Pop committed
598 599

    """
600 601 602
    self.skip_set = frozenset(self.op.skip_checks)
    if not constants.VERIFY_OPTIONAL_CHECKS.issuperset(self.skip_set):
      raise errors.OpPrereqError("Invalid checks to be skipped specified")
Iustin Pop's avatar
Iustin Pop committed
603

Guido Trotter's avatar
Guido Trotter committed
604 605 606 607 608 609 610 611 612 613 614 615
  def BuildHooksEnv(self):
    """Build hooks env.

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

    """
    all_nodes = self.cfg.GetNodeList()
    # TODO: populate the environment with useful information for verify hooks
    env = {}
    return env, [], all_nodes

Iustin Pop's avatar
Iustin Pop committed
616 617 618 619 620 621
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
622 623
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
624 625 626

    vg_name = self.cfg.GetVGName()
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
627
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
628
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
629
    i_non_redundant = [] # Non redundant instances
Iustin Pop's avatar
Iustin Pop committed
630 631
    node_volume = {}
    node_instance = {}
632
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
633
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
634 635 636

    # FIXME: verify OS list
    # do local checksums
637 638 639
    file_names = list(self.sstore.GetFileList())
    file_names.append(constants.SSL_CERT_FILE)
    file_names.append(constants.CLUSTER_CONF_FILE)
Iustin Pop's avatar
Iustin Pop committed
640 641 642 643 644 645 646 647 648 649
    local_checksums = utils.FingerprintFiles(file_names)

    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
    all_volumeinfo = rpc.call_volume_list(nodelist, vg_name)
    all_instanceinfo = rpc.call_instance_list(nodelist)
    all_vglist = rpc.call_vg_list(nodelist)
    node_verify_param = {
      'filelist': file_names,
      'nodelist': nodelist,
      'hypervisor': None,
650 651
      'node-net-test': [(node.name, node.primary_ip, node.secondary_ip)
                        for node in nodeinfo]
Iustin Pop's avatar
Iustin Pop committed
652 653 654
      }
    all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param)
    all_rversion = rpc.call_version(nodelist)
655
    all_ninfo = rpc.call_node_info(nodelist, self.cfg.GetVGName())
Iustin Pop's avatar
Iustin Pop committed
656 657 658 659 660 661 662 663 664 665 666

    for node in nodelist:
      feedback_fn("* Verifying node %s" % node)
      result = self._VerifyNode(node, file_names, local_checksums,
                                all_vglist[node], all_nvinfo[node],
                                all_rversion[node], feedback_fn)
      bad = bad or result

      # node_volume
      volumeinfo = all_volumeinfo[node]

667 668 669 670 671 672
      if isinstance(volumeinfo, basestring):
        feedback_fn("  - ERROR: LVM problem on node %s: %s" %
                    (node, volumeinfo[-400:].encode('string_escape')))
        bad = True
        node_volume[node] = {}
      elif not isinstance(volumeinfo, dict):
Iustin Pop's avatar
Iustin Pop committed
673 674 675
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue
676 677
      else:
        node_volume[node] = volumeinfo
Iustin Pop's avatar
Iustin Pop committed
678 679 680 681 682 683 684 685 686 687

      # node_instance
      nodeinstance = all_instanceinfo[node]
      if type(nodeinstance) != list:
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

      node_instance[node] = nodeinstance

688 689 690 691 692 693 694 695 696 697 698
      # node_info
      nodeinfo = all_ninfo[node]
      if not isinstance(nodeinfo, dict):
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

      try:
        node_info[node] = {
          "mfree": int(nodeinfo['memory_free']),
          "dfree": int(nodeinfo['vg_free']),
699 700
          "pinst": [],
          "sinst": [],
701 702 703 704 705 706 707
          # dictionary holding all instances this node is secondary for,
          # grouped by their primary node. Each key is a cluster node, and each
          # value is a list of instances which have the key as primary and the
          # current node as secondary.  this is handy to calculate N+1 memory
          # availability if you can only failover from a primary to its
          # secondary.
          "sinst-by-pnode": {},
708 709 710 711 712 713
        }
      except ValueError:
        feedback_fn("  - ERROR: invalid value returned from node %s" % (node,))
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
714 715 716 717 718
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      inst_config = self.cfg.GetInstanceInfo(instance)
719 720 721
      result =  self._VerifyInstance(instance, inst_config, node_volume,
                                     node_instance, feedback_fn)
      bad = bad or result
Iustin Pop's avatar
Iustin Pop committed
722 723 724

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
725 726
      instance_cfg[instance] = inst_config

727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748
      pnode = inst_config.primary_node
      if pnode in node_info:
        node_info[pnode]['pinst'].append(instance)
      else:
        feedback_fn("  - ERROR: instance %s, connection to primary node"
                    " %s failed" % (instance, pnode))
        bad = True

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

      for snode in inst_config.secondary_nodes:
        if snode in node_info:
          node_info[snode]['sinst'].append(instance)
749 750 751
          if pnode not in node_info[snode]['sinst-by-pnode']:
            node_info[snode]['sinst-by-pnode'][pnode] = []
          node_info[snode]['sinst-by-pnode'][pnode].append(instance)
752 753 754 755
        else:
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))

Iustin Pop's avatar
Iustin Pop committed
756 757 758 759 760 761 762 763 764 765
    feedback_fn("* Verifying orphan volumes")
    result = self._VerifyOrphanVolumes(node_vol_should, node_volume,
                                       feedback_fn)
    bad = bad or result

    feedback_fn("* Verifying remaining instances")
    result = self._VerifyOrphanInstances(instancelist, node_instance,
                                         feedback_fn)
    bad = bad or result

766 767 768 769
    if constants.VERIFY_NPLUSONE_MEM not in self.skip_set:
      feedback_fn("* Verifying N+1 Memory redundancy")
      result = self._VerifyNPlusOneMemory(node_info, instance_cfg, feedback_fn)
      bad = bad or result
770 771 772 773 774 775

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

Iustin Pop's avatar
Iustin Pop committed
776 777
    return int(bad)

Guido Trotter's avatar
Guido Trotter committed
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818
  def HooksCallBack(self, phase, hooks_results, feedback_fn, lu_result):
    """Analize the post-hooks' result, handle it, and send some
    nicely-formatted feedback back to the user.

    Args:
      phase: the hooks phase that has just been run
      hooks_results: the results of the multi-node hooks rpc call
      feedback_fn: function to send feedback back to the caller
      lu_result: previous Exec result

    """
    # We only really run POST phase hooks, and are only interested in their results
    if phase == constants.HOOKS_PHASE_POST:
      # Used to change hooks' output to proper indentation
      indent_re = re.compile('^', re.M)
      feedback_fn("* Hooks Results")
      if not hooks_results:
        feedback_fn("  - ERROR: general communication failure")
        lu_result = 1
      else:
        for node_name in hooks_results:
          show_node_header = True
          res = hooks_results[node_name]
          if res is False or not isinstance(res, list):
            feedback_fn("    Communication failure")
            lu_result = 1
            continue
          for script, hkr, output in res:
            if hkr == constants.HKR_FAIL:
              # The node header is only shown once, if there are
              # failing hooks on that node
              if show_node_header:
                feedback_fn("  Node %s:" % node_name)
                show_node_header = False
              feedback_fn("    ERROR: Script %s failed, output:" % script)
              output = indent_re.sub('      ', output)
              feedback_fn("%s" % output)
              lu_result = 1

      return lu_result

Iustin Pop's avatar
Iustin Pop committed
819

Iustin Pop's avatar
Iustin Pop committed
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837
class LUVerifyDisks(NoHooksLU):
  """Verifies the cluster disks status.

  """
  _OP_REQP = []

  def CheckPrereq(self):
    """Check prerequisites.

    This has no prerequisites.

    """
    pass

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

    """
838
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866

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

    nv_dict = {}
    for inst in instances:
      inst_lvs = {}
      if (inst.status != "up" or
          inst.disk_template not in constants.DTS_NET_MIRROR):
        continue
      inst.MapLVsByNode(inst_lvs)
      # transform { iname: {node: [vol,],},} to {(node, vol): iname}
      for node, vol_list in inst_lvs.iteritems():
        for vol in vol_list:
          nv_dict[(node, vol)] = inst

    if not nv_dict:
      return result

    node_lvs = rpc.call_volume_list(nodes, vg_name)

    to_act = set()
    for node in nodes:
      # node_volume
      lvs = node_lvs[node]

867 868 869 870
      if isinstance(lvs, basestring):
        logger.Info("error enumerating LVs on node %s: %s" % (node, lvs))
        res_nlvm[node] = lvs
      elif not isinstance(lvs, dict):
Iustin Pop's avatar
Iustin Pop committed
871 872 873 874 875 876
        logger.Info("connection to node %s failed or invalid data returned" %
                    (node,))
        res_nodes.append(node)
        continue

      for lv_name, (_, lv_inactive, lv_online) in lvs.iteritems():
877 878 879
        inst = nv_dict.pop((node, lv_name), None)
        if (not lv_online and inst is not None
            and inst.name not in res_instances):
Iustin Pop's avatar
Iustin Pop committed
880
          res_instances.append(inst.name)
Iustin Pop's avatar
Iustin Pop committed
881

882 883 884 885 886 887 888
    # any leftover items in nv_dict are missing LVs, let's arrange the
    # data better
    for key, inst in nv_dict.iteritems():
      if inst.name not in res_missing:
        res_missing[inst.name] = []
      res_missing[inst.name].append(key)

Iustin Pop's avatar
Iustin Pop committed
889 890 891
    return result


892 893 894 895 896 897 898
class LURenameCluster(LogicalUnit):
  """Rename the cluster.

  """
  HPATH = "cluster-rename"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = ["name"]
899
  REQ_WSSTORE = True
900 901 902 903 904 905

  def BuildHooksEnv(self):
    """Build hooks env.

    """
    env = {
Iustin Pop's avatar
Iustin Pop committed
906
      "OP_TARGET": self.sstore.GetClusterName(),
907 908 909 910 911 912 913 914 915
      "NEW_NAME": self.op.name,
      }
    mn = self.sstore.GetMasterNode()
    return env, [mn], [mn]

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

    """
916
    hostname = utils.HostInfo(self.op.name)
917

918 919
    new_name = hostname.name
    self.ip = new_ip = hostname.ip
920 921 922 923 924 925
    old_name = self.sstore.GetClusterName()
    old_ip = self.sstore.GetMasterIP()
    if new_name == old_name and new_ip == old_ip:
      raise errors.OpPrereqError("Neither the name nor the IP address of the"
                                 " cluster has changed")
    if new_ip != old_ip:
926
      if utils.TcpPing(new_ip, constants.DEFAULT_NODED_PORT):
927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966
        raise errors.OpPrereqError("The given cluster IP address (%s) is"
                                   " reachable on the network. Aborting." %
                                   new_ip)

    self.op.name = new_name

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

    """
    clustername = self.op.name
    ip = self.ip
    ss = self.sstore

    # shutdown the master IP
    master = ss.GetMasterNode()
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")

    try:
      # modify the sstore
      ss.SetKey(ss.SS_MASTER_IP, ip)
      ss.SetKey(ss.SS_CLUSTER_NAME, clustername)

      # Distribute updated ss config to all nodes
      myself = self.cfg.GetNodeInfo(master)
      dist_nodes = self.cfg.GetNodeList()
      if myself.name in dist_nodes:
        dist_nodes.remove(myself.name)

      logger.Debug("Copying updated ssconf data to all nodes")
      for keyname in [ss.SS_CLUSTER_NAME, ss.SS_MASTER_IP]:
        fname = ss.KeyToFilename(keyname)
        result = rpc.call_upload_file(dist_nodes, fname)
        for to_node in dist_nodes:
          if not result[to_node]:
            logger.Error("copy of file %s to node %s failed" %
                         (fname, to_node))
    finally:
      if not rpc.call_node_start_master(master):
967 968
        logger.Error("Could not re-enable the master role on the master,"
                     " please restart manually.")
969 970


971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
def _RecursiveCheckIfLVMBased(disk):
  """Check if the given disk or its children are lvm-based.

  Args:
    disk: ganeti.objects.Disk object

  Returns:
    boolean indicating whether a LD_LV dev_type was found or not

  """
  if disk.children:
    for chdisk in disk.children:
      if _RecursiveCheckIfLVMBased(chdisk):
        return True
  return disk.dev_type == constants.LD_LV


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

  """
  HPATH = "cluster-modify"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = []

  def BuildHooksEnv(self):
    """Build hooks env.

    """
    env = {
      "OP_TARGET": self.sstore.GetClusterName(),
      "NEW_VG_NAME": self.op.vg_name,
      }
    mn = self.sstore.GetMasterNode()
    return env, [mn], [mn]

  def CheckPrereq(self):
    """Check prerequisites.

    This checks whether the given params don't conflict and
1011
    if the given volume group is valid.
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027

    """
    if not self.op.vg_name:
      instances = [self.cfg.GetInstanceInfo(name)
                   for name in self.cfg.GetInstanceList()]
      for inst in instances:
        for disk in inst.disks:
          if _RecursiveCheckIfLVMBased(disk):
            raise errors.OpPrereqError("Cannot disable lvm storage while"
                                       " lvm-based instances exist")

    # if vg_name not None, checks given volume group on all nodes
    if self.op.vg_name:
      node_list = self.cfg.GetNodeList()
      vglist = rpc.call_vg_list(node_list)
      for node in node_list:
1028 1029
        vgstatus = utils.CheckVolumeGroupSize(vglist[node], self.op.vg_name,
                                              constants.MIN_VG_SIZE)
1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044
        if vgstatus:
          raise errors.OpPrereqError("Error on node '%s': %s" %
                                     (node, vgstatus))

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

    """
    if self.op.vg_name != self.cfg.GetVGName():
      self.cfg.SetVGName(self.op.vg_name)
    else:
      feedback_fn("Cluster LVM configuration already in desired"
                  " state, not changing")


Iustin Pop's avatar
Iustin Pop committed
1045
def _WaitForSync(cfgw, instance, proc, oneshot=False, unlock=False):
Iustin Pop's avatar
Iustin Pop committed
1046 1047 1048 1049 1050 1051 1052
  """Sleep and poll for an instance's disk to sync.

  """
  if not instance.disks:
    return True

  if not oneshot:
Iustin Pop's avatar
Iustin Pop committed
1053
    proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066

  node = instance.primary_node

  for dev in instance.disks:
    cfgw.SetDiskID(dev, node)

  retries = 0
  while True:
    max_time = 0
    done = True
    cumul_degraded = False
    rstats = rpc.call_blockdev_getmirrorstatus(node, instance.disks)
    if not rstats:
Iustin Pop's avatar
Iustin Pop committed
1067
      proc.LogWarning("Can't get any data from node %s" % node)
Iustin Pop's avatar
Iustin Pop committed
1068 1069
      retries += 1
      if retries >= 10:
1070 1071
        raise errors.RemoteError("Can't contact node %s for mirror data,"
                                 " aborting." % node)
Iustin Pop's avatar
Iustin Pop committed
1072 1073 1074 1075 1076 1077
      time.sleep(6)
      continue
    retries = 0
    for i in range(len(rstats)):
      mstat = rstats[i]
      if mstat is None:
Iustin Pop's avatar
Iustin Pop committed
1078
        proc.LogWarning("Can't compute data for node %s/%s" %
Iustin Pop's avatar
Iustin Pop committed
1079 1080
                        (node, instance.disks[i].iv_name))
        continue
1081 1082
      # we ignore the ldisk parameter
      perc_done, est_time, is_degraded, _ = mstat
Iustin Pop's avatar
Iustin Pop committed
1083 1084 1085 1086 1087 1088 1089 1090
      cumul_degraded = cumul_degraded or (is_degraded and perc_done is None)
      if perc_done is not None:
        done = False
        if est_time is not None:
          rem_time = "%d estimated seconds remaining" % est_time
          max_time = est_time
        else:
          rem_time = "no time estimate"
Iustin Pop's avatar
Iustin Pop committed
1091 1092
        proc.LogInfo("- device %s: %5.2f%% done, %s" %
                     (instance.disks[i].iv_name, perc_done, rem_time))
Iustin Pop's avatar
Iustin Pop committed
1093 1094 1095 1096
    if done or oneshot:
      break

    if unlock:
1097 1098
      #utils.Unlock('cmd')
      pass
Iustin Pop's avatar
Iustin Pop committed
1099 1100 1101 1102
    try:
      time.sleep(min(60, max_time))
    finally:
      if unlock:
1103 1104
        #utils.Lock('cmd')
        pass
Iustin Pop's avatar
Iustin Pop committed
1105 1106

  if done:
Iustin Pop's avatar
Iustin Pop committed
1107
    proc.LogInfo("Instance %s's disks are in sync." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1108 1109 1110
  return not cumul_degraded


1111
def _CheckDiskConsistency(cfgw, dev, node, on_primary, ldisk=False):
Iustin Pop's avatar
Iustin Pop committed
1112 1113
  """Check that mirrors are not degraded.

1114 1115 1116 1117
  The ldisk parameter, if True, will change the test from the
  is_degraded attribute (which represents overall non-ok status for
  the device(s)) to the ldisk (representing the local storage status).

Iustin Pop's avatar
Iustin Pop committed
1118 1119
  """
  cfgw.SetDiskID(dev, node)
1120 1121 1122 1123
  if ldisk:
    idx = 6
  else:
    idx = 5
Iustin Pop's avatar
Iustin Pop committed
1124 1125 1126 1127 1128

  result = True
  if on_primary or dev.AssembleOnSecondary():
    rstats = rpc.call_blockdev_find(node, dev)
    if not rstats:
1129
      logger.ToStderr("Node %s: Disk degraded, not found or node down" % node)
Iustin Pop's avatar
Iustin Pop committed
1130 1131
      result = False
    else:
1132
      result = result and (not rstats[idx])
Iustin Pop's avatar
Iustin Pop committed
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
  if dev.children:
    for child in dev.children:
      result = result and _CheckDiskConsistency(cfgw, child, node, on_primary)

  return result


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

  """
1144
  _OP_REQP = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
1145 1146 1147 1148 1149 1150 1151

  def CheckPrereq(self):
    """Check prerequisites.

    This always succeeds, since this is a pure query LU.

    """
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
    if self.op.names:
      raise errors.OpPrereqError("Selective OS query not supported")

    self.dynamic_fields = frozenset(["name", "valid", "node_status"])
    _CheckOutputFields(static=[],
                       dynamic=self.dynamic_fields,
                       selected=self.op.output_fields)

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

      Args:
        node_list: a list with the names of all nodes
        rlist: a map with node names as keys and OS objects as values

      Returns:
        map: a map with osnames as keys and as value another map, with
             nodes as
             keys and list of OS objects as values
             e.g. {"debian-etch": {"node1": [<object>,...],
                                   "node2": [<object>,]}
                  }

    """
    all_os = {}
    for node_name, nr in rlist.iteritems():
      if not nr:
        continue
Iustin Pop's avatar
Iustin Pop committed
1181 1182
      for os_obj in nr:
        if os_obj.name not in all_os:
1183 1184
          # build a list of nodes for this os containing empty lists
          # for each node in node_list
Iustin Pop's avatar
Iustin Pop committed
1185
          all_os[os_obj.name] = {}
1186
          for nname in node_list:
Iustin Pop's avatar
Iustin Pop committed
1187 1188
            all_os[os_obj.name][nname] = []
        all_os[os_obj.name][node_name].append(os_obj)
1189
    return all_os
Iustin Pop's avatar
Iustin Pop committed
1190 1191 1192 1193 1194 1195 1196 1197

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

    """
    node_list = self.cfg.GetNodeList()
    node_data = rpc.call_os_diagnose(node_list)
    if node_data == False:
1198
      raise errors.OpExecError("Can't gather the list of OSes")
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217
    pol = self._DiagnoseByOS(node_list, node_data)
    output = []
    for os_name, os_data in pol.iteritems():
      row = []
      for field in self.op.output_fields:
        if field == "name":
          val = os_name
        elif field == "valid":
          val = utils.all([osl and osl[0] for osl in os_data.values()])
        elif field == "node_status":
          val = {}
          for node_name, nos_list in os_data.iteritems():
            val[node_name] = [(v.status, v.path) for v in nos_list]
        else:
          raise errors.ParameterError(field)
        row.append(val)
      output.append(row)

    return output
Iustin Pop's avatar
Iustin Pop committed
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231


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

  """
  HPATH = "node-remove"
  HTYPE = constants.HTYPE_NODE
  _OP_REQP = ["node_name"]

  def BuildHooksEnv(self):
    """Build hooks env.

    This doesn't run on the target node in the pre phase as a failed
1232
    node would then be impossible to remove.
Iustin Pop's avatar
Iustin Pop committed
1233 1234

    """
1235
    env = {
1236
      "OP_TARGET": self.op.node_name,
1237 1238
      "NODE_NAME": self.op.node_name,
      }
Iustin Pop's avatar
Iustin Pop committed
1239 1240
    all_nodes = self.cfg.GetNodeList()
    all_nodes.remove(self.op.node_name)
1241
    return env, all_nodes, all_nodes
Iustin Pop's avatar
Iustin Pop committed
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255

  def CheckPrereq(self):
    """Check prerequisites.

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

    Any errors are signalled by raising errors.OpPrereqError.

    """
    node = self.cfg.GetNodeInfo(self.cfg.ExpandNodeName(self.op.node_name))
    if node is None:
1256
      raise errors.OpPrereqError, ("Node '%s' is unknown." % self.op.node_name)
Iustin Pop's avatar
Iustin Pop committed
1257 1258 1259

    instance_list = self.cfg.GetInstanceList()

1260
    masternode = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
1261
    if node.name == masternode:
1262 1263
      raise errors.OpPrereqError("Node is the master node,"
                                 " you need to failover first.")
Iustin Pop's avatar
Iustin Pop committed
1264 1265 1266 1267

    for instance_name in instance_list:
      instance = self.cfg.GetInstanceInfo(instance_name)
      if node.name == instance.primary_node:
1268 1269
        raise errors.OpPrereqError("Instance %s still running on the node,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1270
      if node.name in instance.secondary_nodes:
1271 1272
        raise errors.OpPrereqError("Instance %s has node as a secondary,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
    self.op.node_name = node.name
    self.node = node

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

    """
    node = self.node
    logger.Info("stopping the node daemon and removing configs from node %s" %
                node.name)

    rpc.call_node_leave_cluster(node.name)

    logger.Info("Removing node %s from config" % node.name)

    self.cfg.RemoveNode(node.name)
1289 1290
    # Remove the node from the Ganeti Lock Manager
    self.context.glm.remove(locking.LEVEL_NODE, node.name)
Iustin Pop's avatar
Iustin Pop committed
1291

1292
    utils.RemoveHostFromEtcHosts(node.name)
1293

Iustin Pop's avatar
Iustin Pop committed
1294 1295 1296 1297 1298

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

  """