cmdlib.py 176 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 40 41 42 43 44

# 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
from ganeti import config
from ganeti import constants
from ganeti import objects
from ganeti import opcodes
from ganeti import ssconf
45
from ganeti import serializer
46 47


Iustin Pop's avatar
Iustin Pop committed
48
class LogicalUnit(object):
49
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
50 51 52 53 54 55 56

  Subclasses must follow these rules:
    - implement CheckPrereq which also fills in the opcode instance
      with all the fields (even if as None)
    - implement Exec
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
57 58
    - optionally redefine their run requirements (REQ_MASTER); note that all
      commands require root permissions
Iustin Pop's avatar
Iustin Pop committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
  REQ_MASTER = True

  def __init__(self, processor, op, cfg, sstore):
    """Constructor for LogicalUnit.

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

    """
Iustin Pop's avatar
Iustin Pop committed
73
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
74 75 76
    self.op = op
    self.cfg = cfg
    self.sstore = sstore
77 78
    self.__ssh = None

Iustin Pop's avatar
Iustin Pop committed
79 80 81
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
82 83
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
84 85 86 87 88 89 90 91 92

    if not cfg.IsCluster():
      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
93

94 95 96 97 98
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
99
      self.__ssh = ssh.SshRunner(self.sstore)
100 101 102 103
    return self.__ssh

  ssh = property(fget=__GetSSH)

Iustin Pop's avatar
Iustin Pop committed
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
  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
    their canonical form; e.g. a short node name must be fully
    expanded after this method has successfully completed (so that
    hooks, logging, etc. work correctly).

    """
    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.

147
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
148 149 150 151 152 153 154

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

    """
    raise NotImplementedError

155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172
  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
173 174 175 176 177 178 179 180 181 182 183 184

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


185
def _GetWantedNodes(lu, nodes):
186
  """Returns list of checked and expanded node names.
187 188 189 190 191

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

  """
192
  if not isinstance(nodes, list):
193
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
194 195

  if nodes:
196
    wanted = []
197 198

    for name in nodes:
199
      node = lu.cfg.ExpandNodeName(name)
200
      if node is None:
201
        raise errors.OpPrereqError("No such node name '%s'" % name)
202
      wanted.append(node)
203 204

  else:
205 206
    wanted = lu.cfg.GetNodeList()
  return utils.NiceSort(wanted)
207 208 209


def _GetWantedInstances(lu, instances):
210
  """Returns list of checked and expanded instance names.
211 212 213 214 215 216 217 218 219 220 221 222

  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:
223
      instance = lu.cfg.ExpandInstanceName(name)
224 225 226 227 228
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
229 230
    wanted = lu.cfg.GetInstanceList()
  return utils.NiceSort(wanted)
231 232 233


def _CheckOutputFields(static, dynamic, selected):
234 235 236 237 238 239 240 241 242
  """Checks whether all selected fields are valid.

  Args:
    static: Static fields
    dynamic: Dynamic fields

  """
  static_fields = frozenset(static)
  dynamic_fields = frozenset(dynamic)
243

244
  all_fields = static_fields | dynamic_fields
245

246
  if not all_fields.issuperset(selected):
247 248 249
    raise errors.OpPrereqError("Unknown output fields selected: %s"
                               % ",".join(frozenset(selected).
                                          difference(all_fields)))
250 251


252
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
253
                          memory, vcpus, nics):
254 255 256 257
  """Builds instance related env variables for hooks from single variables.

  Args:
    secondary_nodes: List of secondary nodes as strings
258 259
  """
  env = {
260
    "OP_TARGET": name,
261 262 263
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
264
    "INSTANCE_OS_TYPE": os_type,
265 266 267 268 269 270 271
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
272
    for idx, (ip, bridge, mac) in enumerate(nics):
273 274 275 276
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
277
      env["INSTANCE_NIC%d_HWADDR" % idx] = mac
278 279 280 281 282 283 284 285 286
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


def _BuildInstanceHookEnvByObject(instance, override=None):
287 288 289 290 291 292
  """Builds instance related env variables for hooks from an object.

  Args:
    instance: objects.Instance object of instance
    override: dict of values to override
  """
293 294 295 296
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
297
    'os_type': instance.os,
298 299 300
    'status': instance.os,
    'memory': instance.memory,
    'vcpus': instance.vcpus,
301
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
302 303 304 305 306 307
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


Iustin Pop's avatar
Iustin Pop committed
308 309 310 311 312 313 314 315 316 317 318
def _HasValidVG(vglist, vgname):
  """Checks if the volume group list is valid.

  A non-None return value means there's an error, and the return value
  is the error message.

  """
  vgsize = vglist.get(vgname, None)
  if vgsize is None:
    return "volume group '%s' missing" % vgname
  elif vgsize < 20480:
319 320
    return ("volume group '%s' too small (20480MiB required, %dMib found)" %
            (vgname, vgsize))
Iustin Pop's avatar
Iustin Pop committed
321 322 323 324 325 326 327 328 329 330 331 332 333 334
  return None


def _InitSSHSetup(node):
  """Setup the SSH configuration for the cluster.


  This generates a dsa keypair for root, adds the pub key to the
  permitted hosts and adds the hostkey to its own known hosts.

  Args:
    node: the name of this host as a fqdn

  """
335
  priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
Iustin Pop's avatar
Iustin Pop committed
336

337 338 339 340
  for name in priv_key, pub_key:
    if os.path.exists(name):
      utils.CreateBackup(name)
    utils.RemoveFile(name)
Iustin Pop's avatar
Iustin Pop committed
341 342

  result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
343
                         "-f", priv_key,
Iustin Pop's avatar
Iustin Pop committed
344 345
                         "-q", "-N", ""])
  if result.failed:
346 347
    raise errors.OpExecError("Could not generate ssh keypair, error %s" %
                             result.output)
Iustin Pop's avatar
Iustin Pop committed
348

349
  f = open(pub_key, 'r')
Iustin Pop's avatar
Iustin Pop committed
350
  try:
351
    utils.AddAuthorizedKey(auth_keys, f.read(8192))
Iustin Pop's avatar
Iustin Pop committed
352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372
  finally:
    f.close()


def _InitGanetiServerSetup(ss):
  """Setup the necessary configuration for the initial node daemon.

  This creates the nodepass file containing the shared password for
  the cluster and also generates the SSL certificate.

  """
  # Create pseudo random password
  randpass = sha.new(os.urandom(64)).hexdigest()
  # and write it into sstore
  ss.SetKey(ss.SS_NODED_PASS, randpass)

  result = utils.RunCmd(["openssl", "req", "-new", "-newkey", "rsa:1024",
                         "-days", str(365*5), "-nodes", "-x509",
                         "-keyout", constants.SSL_CERT_FILE,
                         "-out", constants.SSL_CERT_FILE, "-batch"])
  if result.failed:
373 374 375
    raise errors.OpExecError("could not generate server ssl cert, command"
                             " %s had exitcode %s and error message %s" %
                             (result.cmd, result.exit_code, result.output))
Iustin Pop's avatar
Iustin Pop committed
376 377 378 379 380 381

  os.chmod(constants.SSL_CERT_FILE, 0400)

  result = utils.RunCmd([constants.NODE_INITD_SCRIPT, "restart"])

  if result.failed:
382 383 384
    raise errors.OpExecError("Could not start the node daemon, command %s"
                             " had exitcode %s and error %s" %
                             (result.cmd, result.exit_code, result.output))
Iustin Pop's avatar
Iustin Pop committed
385 386


387 388 389 390 391 392 393 394 395 396 397 398
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
399 400 401 402 403 404
class LUInitCluster(LogicalUnit):
  """Initialise the cluster.

  """
  HPATH = "cluster-init"
  HTYPE = constants.HTYPE_CLUSTER
405
  _OP_REQP = ["cluster_name", "hypervisor_type", "mac_prefix",
406
              "def_bridge", "master_netdev", "file_storage_dir"]
Iustin Pop's avatar
Iustin Pop committed
407 408 409 410 411 412 413 414 415
  REQ_CLUSTER = False

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

    Notes: Since we don't require a cluster, we must manually add
    ourselves in the post-run node list.

    """
416 417
    env = {"OP_TARGET": self.op.cluster_name}
    return env, [], [self.hostname.name]
Iustin Pop's avatar
Iustin Pop committed
418 419 420 421 422 423

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

    """
    if config.ConfigWriter.IsCluster():
424
      raise errors.OpPrereqError("Cluster is already initialised")
Iustin Pop's avatar
Iustin Pop committed
425

426 427 428 429 430 431
    if self.op.hypervisor_type == constants.HT_XEN_HVM31:
      if not os.path.exists(constants.VNC_PASSWORD_FILE):
        raise errors.OpPrereqError("Please prepare the cluster VNC"
                                   "password file %s" %
                                   constants.VNC_PASSWORD_FILE)

432
    self.hostname = hostname = utils.HostInfo()
433

434
    if hostname.ip.startswith("127."):
435
      raise errors.OpPrereqError("This host's IP resolves to the private"
436 437
                                 " range (%s). Please fix DNS or %s." %
                                 (hostname.ip, constants.ETC_HOSTS))
438

439 440
    if not utils.TcpPing(hostname.ip, constants.DEFAULT_NODED_PORT,
                         source=constants.LOCALHOST_IP_ADDRESS):
441 442 443
      raise errors.OpPrereqError("Inconsistency: this host's name resolves"
                                 " to %s,\nbut this ip address does not"
                                 " belong to this host."
444
                                 " Aborting." % hostname.ip)
Iustin Pop's avatar
Iustin Pop committed
445

446 447 448 449 450 451
    self.clustername = clustername = utils.HostInfo(self.op.cluster_name)

    if utils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT,
                     timeout=5):
      raise errors.OpPrereqError("Cluster IP already active. Aborting.")

Iustin Pop's avatar
Iustin Pop committed
452 453
    secondary_ip = getattr(self.op, "secondary_ip", None)
    if secondary_ip and not utils.IsValidIP(secondary_ip):
454
      raise errors.OpPrereqError("Invalid secondary ip given")
455 456
    if (secondary_ip and
        secondary_ip != hostname.ip and
457 458
        (not utils.TcpPing(secondary_ip, constants.DEFAULT_NODED_PORT,
                           source=constants.LOCALHOST_IP_ADDRESS))):
459 460
      raise errors.OpPrereqError("You gave %s as secondary IP,"
                                 " but it does not belong to this host." %
461
                                 secondary_ip)
Iustin Pop's avatar
Iustin Pop committed
462 463
    self.secondary_ip = secondary_ip

464 465 466 467 468 469 470 471
    if not hasattr(self.op, "vg_name"):
      self.op.vg_name = None
    # if vg_name not None, checks if volume group is valid
    if self.op.vg_name:
      vgstatus = _HasValidVG(utils.ListVolumeGroups(), self.op.vg_name)
      if vgstatus:
        raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
                                   " you are not using lvm" % vgstatus)
Iustin Pop's avatar
Iustin Pop committed
472

473 474
    self.op.file_storage_dir = os.path.normpath(self.op.file_storage_dir)

475 476 477 478 479
    if not os.path.isabs(self.op.file_storage_dir):
      raise errors.OpPrereqError("The file storage directory you have is"
                                 " not an absolute path.")

    if not os.path.exists(self.op.file_storage_dir):
480 481 482 483 484 485 486 487 488 489
      try:
        os.makedirs(self.op.file_storage_dir, 0750)
      except OSError, err:
        raise errors.OpPrereqError("Cannot create file storage directory"
                                   " '%s': %s" %
                                   (self.op.file_storage_dir, err))

    if not os.path.isdir(self.op.file_storage_dir):
      raise errors.OpPrereqError("The file storage directory '%s' is not"
                                 " a directory." % self.op.file_storage_dir)
490

Iustin Pop's avatar
Iustin Pop committed
491 492
    if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$",
                    self.op.mac_prefix):
493 494
      raise errors.OpPrereqError("Invalid mac prefix given '%s'" %
                                 self.op.mac_prefix)
Iustin Pop's avatar
Iustin Pop committed
495

496
    if self.op.hypervisor_type not in constants.HYPER_TYPES:
497 498
      raise errors.OpPrereqError("Invalid hypervisor type given '%s'" %
                                 self.op.hypervisor_type)
Iustin Pop's avatar
Iustin Pop committed
499

500 501
    result = utils.RunCmd(["ip", "link", "show", "dev", self.op.master_netdev])
    if result.failed:
502
      raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
Iustin Pop's avatar
Iustin Pop committed
503 504
                                 (self.op.master_netdev,
                                  result.output.strip()))
505

506 507
    if not (os.path.isfile(constants.NODE_INITD_SCRIPT) and
            os.access(constants.NODE_INITD_SCRIPT, os.X_OK)):
508 509
      raise errors.OpPrereqError("Init.d script '%s' missing or not"
                                 " executable." % constants.NODE_INITD_SCRIPT)
510

Iustin Pop's avatar
Iustin Pop committed
511 512 513 514 515 516 517 518
  def Exec(self, feedback_fn):
    """Initialize the cluster.

    """
    clustername = self.clustername
    hostname = self.hostname

    # set up the simple store
519
    self.sstore = ss = ssconf.SimpleStore()
Iustin Pop's avatar
Iustin Pop committed
520
    ss.SetKey(ss.SS_HYPERVISOR, self.op.hypervisor_type)
521 522
    ss.SetKey(ss.SS_MASTER_NODE, hostname.name)
    ss.SetKey(ss.SS_MASTER_IP, clustername.ip)
523
    ss.SetKey(ss.SS_MASTER_NETDEV, self.op.master_netdev)
524
    ss.SetKey(ss.SS_CLUSTER_NAME, clustername.name)
525
    ss.SetKey(ss.SS_FILE_STORAGE_DIR, self.op.file_storage_dir)
526
    ss.SetKey(ss.SS_CONFIG_VERSION, constants.CONFIG_VERSION)
Iustin Pop's avatar
Iustin Pop committed
527 528 529 530 531

    # set up the inter-node password and certificate
    _InitGanetiServerSetup(ss)

    # start the master ip
532
    rpc.call_node_start_master(hostname.name)
Iustin Pop's avatar
Iustin Pop committed
533 534

    # set up ssh config and /etc/hosts
535
    f = open(constants.SSH_HOST_RSA_PUB, 'r')
Iustin Pop's avatar
Iustin Pop committed
536 537 538 539 540 541
    try:
      sshline = f.read()
    finally:
      f.close()
    sshkey = sshline.split(" ")[1]

542
    utils.AddHostToEtcHosts(hostname.name)
543
    _InitSSHSetup(hostname.name)
Iustin Pop's avatar
Iustin Pop committed
544 545

    # init of cluster config file
546
    self.cfg = cfgw = config.ConfigWriter()
547
    cfgw.InitConfig(hostname.name, hostname.ip, self.secondary_ip,
548
                    sshkey, self.op.mac_prefix,
Iustin Pop's avatar
Iustin Pop committed
549 550
                    self.op.vg_name, self.op.def_bridge)

551 552
    ssh.WriteKnownHostsFile(cfgw, ss, constants.SSH_KNOWN_HOSTS_FILE)

Iustin Pop's avatar
Iustin Pop committed
553 554 555 556 557 558 559 560 561 562 563 564 565 566 567

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.

    """
568
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
569 570

    nodelist = self.cfg.GetNodeList()
571
    if len(nodelist) != 1 or nodelist[0] != master:
572 573
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
574 575
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
576 577
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
578 579 580 581 582

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

    """
583
    master = self.sstore.GetMasterNode()
584 585
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")
586 587 588
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
589
    rpc.call_node_leave_cluster(master)
Iustin Pop's avatar
Iustin Pop committed
590 591


Guido Trotter's avatar
Guido Trotter committed
592
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
593 594 595
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
596 597
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
598
  _OP_REQP = ["skip_checks"]
Iustin Pop's avatar
Iustin Pop committed
599 600 601 602 603 604 605 606 607 608 609 610 611 612 613

  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
614

Iustin Pop's avatar
Iustin Pop committed
615 616 617 618
    """
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
619
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657
      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:
      vgstatus = _HasValidVG(vglist, self.cfg.GetVGName())
      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
658
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
659 660 661 662
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
663
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
Iustin Pop's avatar
Iustin Pop committed
664
                          (node, node_result['nodelist'][node]))
665 666 667 668 669 670 671 672 673 674 675
    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
676 677 678 679 680
    hyp_result = node_result.get('hypervisor', None)
    if hyp_result is not None:
      feedback_fn("  - ERROR: hypervisor verify failure: '%s'" % hyp_result)
    return bad

681 682
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
                      node_instance, feedback_fn):
Iustin Pop's avatar
Iustin Pop committed
683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703
    """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':
704 705
      if (node_current not in node_instance or
          not instance in node_instance[node_current]):
Iustin Pop's avatar
Iustin Pop committed
706 707 708 709 710 711 712 713 714 715 716
        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

717
    return bad
Iustin Pop's avatar
Iustin Pop committed
718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750

  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

751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778
  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
779 780 781
  def CheckPrereq(self):
    """Check prerequisites.

782 783
    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
784 785

    """
786 787 788
    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
789

Guido Trotter's avatar
Guido Trotter committed
790 791 792 793 794 795 796 797 798 799 800 801
  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
802 803 804 805 806 807
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
808 809
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
810 811 812

    vg_name = self.cfg.GetVGName()
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
813
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
814
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
815
    i_non_redundant = [] # Non redundant instances
Iustin Pop's avatar
Iustin Pop committed
816 817
    node_volume = {}
    node_instance = {}
818
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
819
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
820 821 822

    # FIXME: verify OS list
    # do local checksums
823 824 825
    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
826 827 828 829 830 831 832 833 834 835
    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,
836 837
      'node-net-test': [(node.name, node.primary_ip, node.secondary_ip)
                        for node in nodeinfo]
Iustin Pop's avatar
Iustin Pop committed
838 839 840
      }
    all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param)
    all_rversion = rpc.call_version(nodelist)
841
    all_ninfo = rpc.call_node_info(nodelist, self.cfg.GetVGName())
Iustin Pop's avatar
Iustin Pop committed
842 843 844 845 846 847 848 849 850 851 852

    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]

853 854 855 856 857 858
      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
859 860 861
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue
862 863
      else:
        node_volume[node] = volumeinfo
Iustin Pop's avatar
Iustin Pop committed
864 865 866 867 868 869 870 871 872 873

      # 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

874 875 876 877 878 879 880 881 882 883 884
      # 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']),
885 886
          "pinst": [],
          "sinst": [],
887 888 889 890 891 892 893
          # 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": {},
894 895 896 897 898 899
        }
      except ValueError:
        feedback_fn("  - ERROR: invalid value returned from node %s" % (node,))
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
900 901 902 903 904
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      inst_config = self.cfg.GetInstanceInfo(instance)
905 906 907
      result =  self._VerifyInstance(instance, inst_config, node_volume,
                                     node_instance, feedback_fn)
      bad = bad or result
Iustin Pop's avatar
Iustin Pop committed
908 909 910

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
911 912
      instance_cfg[instance] = inst_config

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
      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)
935 936 937
          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)
938 939 940 941
        else:
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))

Iustin Pop's avatar
Iustin Pop committed
942 943 944 945 946 947 948 949 950 951
    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

952 953 954 955
    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
956 957 958 959 960 961

    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
962 963
    return int(bad)

Guido Trotter's avatar
Guido Trotter committed
964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
  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
1005

Iustin Pop's avatar
Iustin Pop committed
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
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.

    """
1024
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052

    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]

1053 1054 1055 1056
      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
1057 1058 1059 1060 1061 1062
        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():
1063 1064 1065
        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
1066
          res_instances.append(inst.name)
Iustin Pop's avatar
Iustin Pop committed
1067

1068 1069 1070 1071 1072 1073 1074
    # 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
1075 1076 1077
    return result


1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
class LURenameCluster(LogicalUnit):
  """Rename the cluster.

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

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

    """
    env = {
Iustin Pop's avatar
Iustin Pop committed
1091
      "OP_TARGET": self.sstore.GetClusterName(),
1092 1093 1094 1095 1096 1097 1098 1099 1100
      "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.

    """
1101
    hostname = utils.HostInfo(self.op.name)
1102

1103 1104
    new_name = hostname.name
    self.ip = new_ip = hostname.ip
1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152
    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:
      result = utils.RunCmd(["fping", "-q", new_ip])
      if not result.failed:
        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):
1153 1154
        logger.Error("Could not re-enable the master role on the master,"
                     " please restart manually.")
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 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
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
1197
    if the given volume group is valid.
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229

    """
    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:
        vgstatus = _HasValidVG(vglist[node], self.op.vg_name)
        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
1230
def _WaitForSync(cfgw, instance, proc, oneshot=False, unlock=False):
Iustin Pop's avatar
Iustin Pop committed
1231 1232 1233 1234 1235 1236 1237
  """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
1238
    proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251

  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
1252
      proc.LogWarning("Can't get any data from node %s" % node)
Iustin Pop's avatar
Iustin Pop committed
1253 1254
      retries += 1
      if retries >= 10:
1255 1256
        raise errors.RemoteError("Can't contact node %s for mirror data,"
                                 " aborting." % node)
Iustin Pop's avatar
Iustin Pop committed
1257 1258 1259 1260 1261 1262
      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
1263
        proc.LogWarning("Can't compute data for node %s/%s" %
Iustin Pop's avatar
Iustin Pop committed
1264 1265
                        (node, instance.disks[i].iv_name))
        continue
1266 1267
      # we ignore the ldisk parameter
      perc_done, est_time, is_degraded, _ = mstat