cmdlib.py 169 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 59 60 61
    - optionally redefine their run requirements:
        REQ_MASTER: the LU needs to run on the master node
        REQ_WSSTORE: the LU needs a writable SimpleStore

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
62 63 64 65 66 67

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
  REQ_MASTER = True
68
  REQ_WSSTORE = False
Iustin Pop's avatar
Iustin Pop committed
69 70 71 72 73 74 75 76

  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
77
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
78 79 80
    self.op = op
    self.cfg = cfg
    self.sstore = sstore
81 82
    self.__ssh = None

Iustin Pop's avatar
Iustin Pop committed
83 84 85
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
86 87
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
88 89 90 91 92 93 94 95 96

    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
97

98 99 100 101 102
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
103
      self.__ssh = ssh.SshRunner(self.sstore)
104 105 106 107
    return self.__ssh

  ssh = property(fget=__GetSSH)

Iustin Pop's avatar
Iustin Pop committed
108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150
  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.

151
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
152 153 154 155 156 157 158

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

    """
    raise NotImplementedError

159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
  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
177 178 179 180 181 182 183 184 185 186 187 188

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


189
def _GetWantedNodes(lu, nodes):
190
  """Returns list of checked and expanded node names.
191 192 193 194 195

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

  """
196
  if not isinstance(nodes, list):
197
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
198 199

  if nodes:
200
    wanted = []
201 202

    for name in nodes:
203
      node = lu.cfg.ExpandNodeName(name)
204
      if node is None:
205
        raise errors.OpPrereqError("No such node name '%s'" % name)
206
      wanted.append(node)
207 208

  else:
209 210
    wanted = lu.cfg.GetNodeList()
  return utils.NiceSort(wanted)
211 212 213


def _GetWantedInstances(lu, instances):
214
  """Returns list of checked and expanded instance names.
215 216 217 218 219 220 221 222 223 224 225 226

  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:
227
      instance = lu.cfg.ExpandInstanceName(name)
228 229 230 231 232
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
233 234
    wanted = lu.cfg.GetInstanceList()
  return utils.NiceSort(wanted)
235 236 237


def _CheckOutputFields(static, dynamic, selected):
238 239 240 241 242 243 244 245 246
  """Checks whether all selected fields are valid.

  Args:
    static: Static fields
    dynamic: Dynamic fields

  """
  static_fields = frozenset(static)
  dynamic_fields = frozenset(dynamic)
247

248
  all_fields = static_fields | dynamic_fields
249

250
  if not all_fields.issuperset(selected):
251 252 253
    raise errors.OpPrereqError("Unknown output fields selected: %s"
                               % ",".join(frozenset(selected).
                                          difference(all_fields)))
254 255


256
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
257
                          memory, vcpus, nics):
258 259 260 261
  """Builds instance related env variables for hooks from single variables.

  Args:
    secondary_nodes: List of secondary nodes as strings
262 263
  """
  env = {
264
    "OP_TARGET": name,
265 266 267
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
268
    "INSTANCE_OS_TYPE": os_type,
269 270 271 272 273 274 275
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
276
    for idx, (ip, bridge, mac) in enumerate(nics):
277 278 279 280
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
281
      env["INSTANCE_NIC%d_HWADDR" % idx] = mac
282 283 284 285 286 287 288 289 290
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


def _BuildInstanceHookEnvByObject(instance, override=None):
291 292 293 294 295 296
  """Builds instance related env variables for hooks from an object.

  Args:
    instance: objects.Instance object of instance
    override: dict of values to override
  """
297 298 299 300
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
301
    'os_type': instance.os,
302 303 304
    'status': instance.os,
    'memory': instance.memory,
    'vcpus': instance.vcpus,
305
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
306 307 308 309 310 311
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


312 313 314 315 316 317 318 319 320 321 322 323
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
324 325 326 327 328 329 330 331 332 333 334 335 336 337
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.

    """
338
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
339 340

    nodelist = self.cfg.GetNodeList()
341
    if len(nodelist) != 1 or nodelist[0] != master:
342 343
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
344 345
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
346 347
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
348 349 350 351 352

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

    """
353
    master = self.sstore.GetMasterNode()
354 355
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")
356 357 358
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
359
    rpc.call_node_leave_cluster(master)
Iustin Pop's avatar
Iustin Pop committed
360 361


Guido Trotter's avatar
Guido Trotter committed
362
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
363 364 365
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
366 367
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
368
  _OP_REQP = ["skip_checks"]
Iustin Pop's avatar
Iustin Pop committed
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383

  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
384

Iustin Pop's avatar
Iustin Pop committed
385 386 387 388
    """
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
389
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
390 391 392 393 394 395 396 397 398 399 400 401 402 403 404
      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:
405 406
      vgstatus = utils.CheckVolumeGroupSize(vglist, self.cfg.GetVGName(),
                                            constants.MIN_VG_SIZE)
Iustin Pop's avatar
Iustin Pop committed
407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428
      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
429
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
430 431 432 433
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
434
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
Iustin Pop's avatar
Iustin Pop committed
435
                          (node, node_result['nodelist'][node]))
436 437 438 439 440 441 442 443 444 445 446
    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
447 448 449 450 451
    hyp_result = node_result.get('hypervisor', None)
    if hyp_result is not None:
      feedback_fn("  - ERROR: hypervisor verify failure: '%s'" % hyp_result)
    return bad

452 453
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
                      node_instance, feedback_fn):
Iustin Pop's avatar
Iustin Pop committed
454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474
    """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':
475 476
      if (node_current not in node_instance or
          not instance in node_instance[node_current]):
Iustin Pop's avatar
Iustin Pop committed
477 478 479 480 481 482 483 484 485 486 487
        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

488
    return bad
Iustin Pop's avatar
Iustin Pop committed
489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521

  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

522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549
  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
550 551 552
  def CheckPrereq(self):
    """Check prerequisites.

553 554
    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
555 556

    """
557 558 559
    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
560

Guido Trotter's avatar
Guido Trotter committed
561 562 563 564 565 566 567 568 569 570 571 572
  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
573 574 575 576 577 578
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
579 580
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
581 582 583

    vg_name = self.cfg.GetVGName()
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
584
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
585
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
586
    i_non_redundant = [] # Non redundant instances
Iustin Pop's avatar
Iustin Pop committed
587 588
    node_volume = {}
    node_instance = {}
589
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
590
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
591 592 593

    # FIXME: verify OS list
    # do local checksums
594 595 596
    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
597 598 599 600 601 602 603 604 605 606
    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,
607 608
      'node-net-test': [(node.name, node.primary_ip, node.secondary_ip)
                        for node in nodeinfo]
Iustin Pop's avatar
Iustin Pop committed
609 610 611
      }
    all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param)
    all_rversion = rpc.call_version(nodelist)
612
    all_ninfo = rpc.call_node_info(nodelist, self.cfg.GetVGName())
Iustin Pop's avatar
Iustin Pop committed
613 614 615 616 617 618 619 620 621 622 623

    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]

624 625 626 627 628 629
      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
630 631 632
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue
633 634
      else:
        node_volume[node] = volumeinfo
Iustin Pop's avatar
Iustin Pop committed
635 636 637 638 639 640 641 642 643 644

      # 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

645 646 647 648 649 650 651 652 653 654 655
      # 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']),
656 657
          "pinst": [],
          "sinst": [],
658 659 660 661 662 663 664
          # 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": {},
665 666 667 668 669 670
        }
      except ValueError:
        feedback_fn("  - ERROR: invalid value returned from node %s" % (node,))
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
671 672 673 674 675
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      inst_config = self.cfg.GetInstanceInfo(instance)
676 677 678
      result =  self._VerifyInstance(instance, inst_config, node_volume,
                                     node_instance, feedback_fn)
      bad = bad or result
Iustin Pop's avatar
Iustin Pop committed
679 680 681

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
682 683
      instance_cfg[instance] = inst_config

684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
      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)
706 707 708
          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)
709 710 711 712
        else:
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))

Iustin Pop's avatar
Iustin Pop committed
713 714 715 716 717 718 719 720 721 722
    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

723 724 725 726
    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
727 728 729 730 731 732

    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
733 734
    return int(bad)

Guido Trotter's avatar
Guido Trotter committed
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
  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
776

Iustin Pop's avatar
Iustin Pop committed
777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794
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.

    """
795
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823

    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]

824 825 826 827
      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
828 829 830 831 832 833
        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():
834 835 836
        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
837
          res_instances.append(inst.name)
Iustin Pop's avatar
Iustin Pop committed
838

839 840 841 842 843 844 845
    # 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
846 847 848
    return result


849 850 851 852 853 854 855
class LURenameCluster(LogicalUnit):
  """Rename the cluster.

  """
  HPATH = "cluster-rename"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = ["name"]
856
  REQ_WSSTORE = True
857 858 859 860 861 862

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

    """
    env = {
Iustin Pop's avatar
Iustin Pop committed
863
      "OP_TARGET": self.sstore.GetClusterName(),
864 865 866 867 868 869 870 871 872
      "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.

    """
873
    hostname = utils.HostInfo(self.op.name)
874

875 876
    new_name = hostname.name
    self.ip = new_ip = hostname.ip
877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924
    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):
925 926
        logger.Error("Could not re-enable the master role on the master,"
                     " please restart manually.")
927 928


929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968
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
969
    if the given volume group is valid.
970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985

    """
    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:
986 987
        vgstatus = utils.CheckVolumeGroupSize(vglist[node], self.op.vg_name,
                                              constants.MIN_VG_SIZE)
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
        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
1003
def _WaitForSync(cfgw, instance, proc, oneshot=False, unlock=False):
Iustin Pop's avatar
Iustin Pop committed
1004 1005 1006 1007 1008 1009 1010
  """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
1011
    proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024

  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
1025
      proc.LogWarning("Can't get any data from node %s" % node)
Iustin Pop's avatar
Iustin Pop committed
1026 1027
      retries += 1
      if retries >= 10:
1028 1029
        raise errors.RemoteError("Can't contact node %s for mirror data,"
                                 " aborting." % node)
Iustin Pop's avatar
Iustin Pop committed
1030 1031 1032 1033 1034 1035
      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
1036
        proc.LogWarning("Can't compute data for node %s/%s" %
Iustin Pop's avatar
Iustin Pop committed
1037 1038
                        (node, instance.disks[i].iv_name))
        continue
1039 1040
      # we ignore the ldisk parameter
      perc_done, est_time, is_degraded, _ = mstat
Iustin Pop's avatar
Iustin Pop committed
1041 1042 1043 1044 1045 1046 1047 1048
      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
1049 1050
        proc.LogInfo("- device %s: %5.2f%% done, %s" %
                     (instance.disks[i].iv_name, perc_done, rem_time))
Iustin Pop's avatar
Iustin Pop committed
1051 1052 1053 1054
    if done or oneshot:
      break

    if unlock:
1055 1056
      #utils.Unlock('cmd')
      pass
Iustin Pop's avatar
Iustin Pop committed
1057 1058 1059 1060
    try:
      time.sleep(min(60, max_time))
    finally:
      if unlock:
1061 1062
        #utils.Lock('cmd')
        pass
Iustin Pop's avatar
Iustin Pop committed
1063 1064

  if done:
Iustin Pop's avatar
Iustin Pop committed
1065
    proc.LogInfo("Instance %s's disks are in sync." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1066 1067 1068
  return not cumul_degraded


1069
def _CheckDiskConsistency(cfgw, dev, node, on_primary, ldisk=False):
Iustin Pop's avatar
Iustin Pop committed
1070 1071
  """Check that mirrors are not degraded.

1072 1073 1074 1075
  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
1076 1077
  """
  cfgw.SetDiskID(dev, node)
1078 1079 1080 1081
  if ldisk:
    idx = 6
  else:
    idx = 5
Iustin Pop's avatar
Iustin Pop committed
1082 1083 1084 1085 1086

  result = True
  if on_primary or dev.AssembleOnSecondary():
    rstats = rpc.call_blockdev_find(node, dev)
    if not rstats:
1087
      logger.ToStderr("Node %s: Disk degraded, not found or node down" % node)
Iustin Pop's avatar
Iustin Pop committed
1088 1089
      result = False
    else:
1090
      result = result and (not rstats[idx])
Iustin Pop's avatar
Iustin Pop committed
1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
  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.

  """
1102
  _OP_REQP = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
1103 1104 1105 1106 1107 1108 1109

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

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

    """
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
    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
1139 1140
      for os_obj in nr:
        if os_obj.name not in all_os:
1141 1142
          # build a list of nodes for this os containing empty lists
          # for each node in node_list
Iustin Pop's avatar
Iustin Pop committed
1143
          all_os[os_obj.name] = {}
1144
          for nname in node_list:
Iustin Pop's avatar
Iustin Pop committed
1145 1146
            all_os[os_obj.name][nname] = []
        all_os[os_obj.name][node_name].append(os_obj)
1147
    return all_os
Iustin Pop's avatar
Iustin Pop committed
1148 1149 1150 1151 1152 1153 1154 1155

  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:
1156
      raise errors.OpExecError("Can't gather the list of OSes")
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175
    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
1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192


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
    node would not allows itself to run.

    """
1193
    env = {
1194
      "OP_TARGET": self.op.node_name,
1195 1196
      "NODE_NAME": self.op.node_name,
      }
Iustin Pop's avatar
Iustin Pop committed
1197 1198
    all_nodes = self.cfg.GetNodeList()
    all_nodes.remove(self.op.node_name)
1199
    return env, all_nodes, all_nodes
Iustin Pop's avatar
Iustin Pop committed
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213

  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:
1214
      raise errors.OpPrereqError, ("Node '%s' is unknown." % self.op.node_name)
Iustin Pop's avatar
Iustin Pop committed
1215 1216 1217

    instance_list = self.cfg.GetInstanceList()

1218
    masternode = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
1219
    if node.name == masternode:
1220 1221
      raise errors.OpPrereqError("Node is the master node,"
                                 " you need to failover first.")
Iustin Pop's avatar
Iustin Pop committed
1222 1223 1224 1225

    for instance_name in instance_list:
      instance = self.cfg.GetInstanceInfo(instance_name)
      if node.name == instance.primary_node:
1226 1227
        raise errors.OpPrereqError("Instance %s still running on the node,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1228
      if node.name in instance.secondary_nodes:
1229 1230
        raise errors.OpPrereqError("Instance %s has node as a secondary,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243
    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)

1244
    self.ssh.Run(node.name, 'root', "%s stop" % constants.NODE_INITD_SCRIPT)
Iustin Pop's avatar
Iustin Pop committed
1245 1246 1247 1248 1249

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

    self.cfg.RemoveNode(node.name)

1250
    utils.RemoveHostFromEtcHosts(node.name)
1251

Iustin Pop's avatar
Iustin Pop committed
1252 1253 1254 1255 1256

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

  """
1257
  _OP_REQP = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
1258 1259 1260 1261 1262 1263 1264

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

    This checks that the fields required are valid output fields.

    """
1265 1266 1267 1268 1269 1270
    self.dynamic_fields = frozenset([
      "dtotal", "dfree",
      "mtotal", "mnode", "mfree",
      "bootid",
      "ctotal",
      ])
Iustin Pop's avatar
Iustin Pop committed
1271

1272 1273
    _CheckOutputFields(static=["name", "pinst_cnt", "sinst_cnt",
                               "pinst_list", "sinst_list",
1274
                               "pip", "sip", "tags"],
1275 1276
                       dynamic=self.dynamic_fields,
                       selected=self.op.output_fields)
Iustin Pop's avatar
Iustin Pop committed
1277

1278
    self.wanted = _GetWantedNodes(self, self.op.names)
Iustin Pop's avatar
Iustin Pop committed
1279 1280 1281 1282 1283

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

    """
1284
    nodenames = self.wanted
Iustin Pop's avatar
Iustin Pop committed
1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
    nodelist = [self.cfg.GetNodeInfo(name) for name in nodenames]

    # begin data gathering

    if self.dynamic_fields.intersection(self.op.output_fields):
      live_data = {}
      node_data = rpc.call_node_info(nodenames, self.cfg.GetVGName())
      for name in nodenames:
        nodeinfo = node_data.get(name, None)
        if nodeinfo:
          live_data[name] = {
            "mtotal": utils.TryConvert(int, nodeinfo['memory_total']),
            "mnode": utils.TryConvert(int, nodeinfo['memory_dom0']),
            "mfree": utils.TryConvert(int, nodeinfo['memory_free']),
            "dtotal": utils.TryConvert(int, nodeinfo['vg_size']),
            "dfree": utils.TryConvert(int, nodeinfo['vg_free']),
1301
            "ctotal": utils.TryConvert(int, nodeinfo['cpu_total']),
1302
            "bootid": nodeinfo['bootid'],
Iustin Pop's avatar
Iustin Pop committed
1303 1304 1305 1306 1307 1308
            }
        else:
          live_data[name] = {}
    else:
      live_data = dict.fromkeys(nodenames, {})

1309 1310
    node_to_primary = dict([(name, set()) for name in nodenames])
    node_to_secondary = dict([(name, set()) for name in nodenames])