cmdlib.py 115 KB
Newer Older
Iustin Pop's avatar
Iustin Pop committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
#!/usr/bin/python
#

# Copyright (C) 2006, 2007 Google Inc.
#
# 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 45 46 47

# pylint: disable-msg=W0613,W0201

import os
import os.path
import sha
import socket
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

class LogicalUnit(object):
48
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

  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
    - optionally redefine their run requirements (REQ_CLUSTER,
      REQ_MASTER); note that all commands require root permissions

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
  REQ_CLUSTER = True
  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.

    """
    self.processor = processor
    self.op = op
    self.cfg = cfg
    self.sstore = sstore
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
80 81
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
Iustin Pop's avatar
Iustin Pop committed
82 83
    if self.REQ_CLUSTER:
      if not cfg.IsCluster():
84 85
        raise errors.OpPrereqError("Cluster not initialized yet,"
                                   " use 'gnt-cluster init' first.")
Iustin Pop's avatar
Iustin Pop committed
86
      if self.REQ_MASTER:
87
        master = sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
88
        if master != socket.gethostname():
89 90
          raise errors.OpPrereqError("Commands must be run on the master"
                                     " node %s" % master)
Iustin Pop's avatar
Iustin Pop committed
91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166

  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.

    As for the node lists, the master should not be included in the
    them, as it will be added by the hooks runner in case this LU
    requires a cluster to run on (otherwise we don't have a node
    list). No nodes should be returned as an empty list (and not
    None).

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

    """
    raise NotImplementedError


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

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

    This is a no-op, since we don't run hooks.

    """
    return


167
def _GetWantedNodes(lu, nodes):
168 169 170 171 172 173
  """Returns list of checked and expanded nodes.

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

  """
174
  if nodes is not None and not isinstance(nodes, list):
175
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
176 177 178 179 180 181 182

  if nodes:
    wanted_nodes = []

    for name in nodes:
      node = lu.cfg.GetNodeInfo(lu.cfg.ExpandNodeName(name))
      if node is None:
183
        raise errors.OpPrereqError("No such node name '%s'" % name)
184 185 186 187 188 189 190 191
    wanted_nodes.append(node)

    return wanted_nodes
  else:
    return [lu.cfg.GetNodeInfo(name) for name in lu.cfg.GetNodeList()]


def _CheckOutputFields(static, dynamic, selected):
192 193 194 195 196 197 198 199 200
  """Checks whether all selected fields are valid.

  Args:
    static: Static fields
    dynamic: Dynamic fields

  """
  static_fields = frozenset(static)
  dynamic_fields = frozenset(dynamic)
201

202
  all_fields = static_fields | dynamic_fields
203

204
  if not all_fields.issuperset(selected):
205 206 207
    raise errors.OpPrereqError("Unknown output fields selected: %s"
                               % ",".join(frozenset(selected).
                                          difference(all_fields)))
208 209


210
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
211
                          memory, vcpus, nics):
212 213 214 215
  """Builds instance related env variables for hooks from single variables.

  Args:
    secondary_nodes: List of secondary nodes as strings
216 217 218 219 220
  """
  env = {
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
221
    "INSTANCE_OS_TYPE": os_type,
222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
    for idx, (ip, bridge) in enumerate(nics):
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


def _BuildInstanceHookEnvByObject(instance, override=None):
243 244 245 246 247 248
  """Builds instance related env variables for hooks from an object.

  Args:
    instance: objects.Instance object of instance
    override: dict of values to override
  """
249 250 251 252
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
253
    'os_type': instance.os,
254 255 256 257 258 259 260 261 262 263
    'status': instance.os,
    'memory': instance.memory,
    'vcpus': instance.vcpus,
    'nics': [(nic.ip, nic.bridge) for nic in instance.nics],
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


Iustin Pop's avatar
Iustin Pop committed
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434
def _UpdateEtcHosts(fullnode, ip):
  """Ensure a node has a correct entry in /etc/hosts.

  Args:
    fullnode - Fully qualified domain name of host. (str)
    ip       - IPv4 address of host (str)

  """
  node = fullnode.split(".", 1)[0]

  f = open('/etc/hosts', 'r+')

  inthere = False

  save_lines = []
  add_lines = []
  removed = False

  while True:
    rawline = f.readline()

    if not rawline:
      # End of file
      break

    line = rawline.split('\n')[0]

    # Strip off comments
    line = line.split('#')[0]

    if not line:
      # Entire line was comment, skip
      save_lines.append(rawline)
      continue

    fields = line.split()

    haveall = True
    havesome = False
    for spec in [ ip, fullnode, node ]:
      if spec not in fields:
        haveall = False
      if spec in fields:
        havesome = True

    if haveall:
      inthere = True
      save_lines.append(rawline)
      continue

    if havesome and not haveall:
      # Line (old, or manual?) which is missing some.  Remove.
      removed = True
      continue

    save_lines.append(rawline)

  if not inthere:
    add_lines.append('%s\t%s %s\n' % (ip, fullnode, node))

  if removed:
    if add_lines:
      save_lines = save_lines + add_lines

    # We removed a line, write a new file and replace old.
    fd, tmpname = tempfile.mkstemp('tmp', 'hosts_', '/etc')
    newfile = os.fdopen(fd, 'w')
    newfile.write(''.join(save_lines))
    newfile.close()
    os.rename(tmpname, '/etc/hosts')

  elif add_lines:
    # Simply appending a new line will do the trick.
    f.seek(0, 2)
    for add in add_lines:
      f.write(add)

  f.close()


def _UpdateKnownHosts(fullnode, ip, pubkey):
  """Ensure a node has a correct known_hosts entry.

  Args:
    fullnode - Fully qualified domain name of host. (str)
    ip       - IPv4 address of host (str)
    pubkey   - the public key of the cluster

  """
  if os.path.exists('/etc/ssh/ssh_known_hosts'):
    f = open('/etc/ssh/ssh_known_hosts', 'r+')
  else:
    f = open('/etc/ssh/ssh_known_hosts', 'w+')

  inthere = False

  save_lines = []
  add_lines = []
  removed = False

  while True:
    rawline = f.readline()
    logger.Debug('read %s' % (repr(rawline),))

    if not rawline:
      # End of file
      break

    line = rawline.split('\n')[0]

    parts = line.split(' ')
    fields = parts[0].split(',')
    key = parts[2]

    haveall = True
    havesome = False
    for spec in [ ip, fullnode ]:
      if spec not in fields:
        haveall = False
      if spec in fields:
        havesome = True

    logger.Debug("key, pubkey = %s." % (repr((key, pubkey)),))
    if haveall and key == pubkey:
      inthere = True
      save_lines.append(rawline)
      logger.Debug("Keeping known_hosts '%s'." % (repr(rawline),))
      continue

    if havesome and (not haveall or key != pubkey):
      removed = True
      logger.Debug("Discarding known_hosts '%s'." % (repr(rawline),))
      continue

    save_lines.append(rawline)

  if not inthere:
    add_lines.append('%s,%s ssh-rsa %s\n' % (fullnode, ip, pubkey))
    logger.Debug("Adding known_hosts '%s'." % (repr(add_lines[-1]),))

  if removed:
    save_lines = save_lines + add_lines

    # Write a new file and replace old.
    fd, tmpname = tempfile.mkstemp('tmp', 'ssh_known_hosts_', '/etc/ssh')
    newfile = os.fdopen(fd, 'w')
    newfile.write(''.join(save_lines))
    newfile.close()
    logger.Debug("Wrote new known_hosts.")
    os.rename(tmpname, '/etc/ssh/ssh_known_hosts')

  elif add_lines:
    # Simply appending a new line will do the trick.
    f.seek(0, 2)
    for add in add_lines:
      f.write(add)

  f.close()


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:
435 436
    return ("volume group '%s' too small (20480MiB required, %dMib found)" %
            (vgname, vgsize))
Iustin Pop's avatar
Iustin Pop committed
437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464
  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

  """
  utils.RemoveFile('/root/.ssh/known_hosts')

  if os.path.exists('/root/.ssh/id_dsa'):
    utils.CreateBackup('/root/.ssh/id_dsa')
  if os.path.exists('/root/.ssh/id_dsa.pub'):
    utils.CreateBackup('/root/.ssh/id_dsa.pub')

  utils.RemoveFile('/root/.ssh/id_dsa')
  utils.RemoveFile('/root/.ssh/id_dsa.pub')

  result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
                         "-f", "/root/.ssh/id_dsa",
                         "-q", "-N", ""])
  if result.failed:
465 466
    raise errors.OpExecError("Could not generate ssh keypair, error %s" %
                             result.output)
Iustin Pop's avatar
Iustin Pop committed
467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491

  f = open('/root/.ssh/id_dsa.pub', 'r')
  try:
    utils.AddAuthorizedKey('/root/.ssh/authorized_keys', f.read(8192))
  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:
492 493 494
    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
495 496 497 498 499 500

  os.chmod(constants.SSL_CERT_FILE, 0400)

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

  if result.failed:
501 502 503
    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
504 505 506 507 508 509 510 511 512


class LUInitCluster(LogicalUnit):
  """Initialise the cluster.

  """
  HPATH = "cluster-init"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = ["cluster_name", "hypervisor_type", "vg_name", "mac_prefix",
513
              "def_bridge", "master_netdev"]
Iustin Pop's avatar
Iustin Pop committed
514 515 516 517 518 519 520 521 522
  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.

    """
523 524 525 526
    env = {
      "CLUSTER": self.op.cluster_name,
      "MASTER": self.hostname['hostname_full'],
      }
Iustin Pop's avatar
Iustin Pop committed
527 528 529 530 531 532 533
    return env, [], [self.hostname['hostname_full']]

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

    """
    if config.ConfigWriter.IsCluster():
534
      raise errors.OpPrereqError("Cluster is already initialised")
Iustin Pop's avatar
Iustin Pop committed
535 536 537 538

    hostname_local = socket.gethostname()
    self.hostname = hostname = utils.LookupHostname(hostname_local)
    if not hostname:
539 540
      raise errors.OpPrereqError("Cannot resolve my own hostname ('%s')" %
                                 hostname_local)
Iustin Pop's avatar
Iustin Pop committed
541 542 543

    self.clustername = clustername = utils.LookupHostname(self.op.cluster_name)
    if not clustername:
544 545
      raise errors.OpPrereqError("Cannot resolve given cluster name ('%s')"
                                 % self.op.cluster_name)
Iustin Pop's avatar
Iustin Pop committed
546 547 548

    result = utils.RunCmd(["fping", "-S127.0.0.1", "-q", hostname['ip']])
    if result.failed:
549 550 551 552
      raise errors.OpPrereqError("Inconsistency: this host's name resolves"
                                 " to %s,\nbut this ip address does not"
                                 " belong to this host."
                                 " Aborting." % hostname['ip'])
Iustin Pop's avatar
Iustin Pop committed
553 554 555

    secondary_ip = getattr(self.op, "secondary_ip", None)
    if secondary_ip and not utils.IsValidIP(secondary_ip):
556
      raise errors.OpPrereqError("Invalid secondary ip given")
Iustin Pop's avatar
Iustin Pop committed
557 558 559
    if secondary_ip and secondary_ip != hostname['ip']:
      result = utils.RunCmd(["fping", "-S127.0.0.1", "-q", secondary_ip])
      if result.failed:
560 561 562
        raise errors.OpPrereqError("You gave %s as secondary IP,\n"
                                   "but it does not belong to this host." %
                                   secondary_ip)
Iustin Pop's avatar
Iustin Pop committed
563 564 565 566 567 568
    self.secondary_ip = secondary_ip

    # checks presence of the volume group given
    vgstatus = _HasValidVG(utils.ListVolumeGroups(), self.op.vg_name)

    if vgstatus:
569
      raise errors.OpPrereqError("Error: %s" % vgstatus)
Iustin Pop's avatar
Iustin Pop committed
570 571 572

    if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$",
                    self.op.mac_prefix):
573 574
      raise errors.OpPrereqError("Invalid mac prefix given '%s'" %
                                 self.op.mac_prefix)
Iustin Pop's avatar
Iustin Pop committed
575 576

    if self.op.hypervisor_type not in hypervisor.VALID_HTYPES:
577 578
      raise errors.OpPrereqError("Invalid hypervisor type given '%s'" %
                                 self.op.hypervisor_type)
Iustin Pop's avatar
Iustin Pop committed
579

580 581
    result = utils.RunCmd(["ip", "link", "show", "dev", self.op.master_netdev])
    if result.failed:
582 583
      raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
                                 (self.op.master_netdev, result.output))
584

Iustin Pop's avatar
Iustin Pop committed
585 586 587 588 589 590 591 592 593 594
  def Exec(self, feedback_fn):
    """Initialize the cluster.

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

    # set up the simple store
    ss = ssconf.SimpleStore()
    ss.SetKey(ss.SS_HYPERVISOR, self.op.hypervisor_type)
595 596 597
    ss.SetKey(ss.SS_MASTER_NODE, hostname['hostname_full'])
    ss.SetKey(ss.SS_MASTER_IP, clustername['ip'])
    ss.SetKey(ss.SS_MASTER_NETDEV, self.op.master_netdev)
598
    ss.SetKey(ss.SS_CLUSTER_NAME, clustername['hostname'])
Iustin Pop's avatar
Iustin Pop committed
599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627

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

    # start the master ip
    rpc.call_node_start_master(hostname['hostname_full'])

    # set up ssh config and /etc/hosts
    f = open('/etc/ssh/ssh_host_rsa_key.pub', 'r')
    try:
      sshline = f.read()
    finally:
      f.close()
    sshkey = sshline.split(" ")[1]

    _UpdateEtcHosts(hostname['hostname_full'],
                    hostname['ip'],
                    )

    _UpdateKnownHosts(hostname['hostname_full'],
                      hostname['ip'],
                      sshkey,
                      )

    _InitSSHSetup(hostname['hostname'])

    # init of cluster config file
    cfgw = config.ConfigWriter()
    cfgw.InitConfig(hostname['hostname'], hostname['ip'], self.secondary_ip,
628
                    sshkey, self.op.mac_prefix,
Iustin Pop's avatar
Iustin Pop committed
629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645
                    self.op.vg_name, self.op.def_bridge)


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.

    """
646
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
647 648

    nodelist = self.cfg.GetNodeList()
649
    if len(nodelist) != 1 or nodelist[0] != master:
650 651
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
652 653
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
654 655
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
656 657 658 659 660 661 662

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

    """
    utils.CreateBackup('/root/.ssh/id_dsa')
    utils.CreateBackup('/root/.ssh/id_dsa.pub')
663
    rpc.call_node_leave_cluster(self.sstore.GetMasterNode())
Iustin Pop's avatar
Iustin Pop committed
664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685


class LUVerifyCluster(NoHooksLU):
  """Verifies the cluster status.

  """
  _OP_REQP = []

  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
686

Iustin Pop's avatar
Iustin Pop committed
687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832
    """
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
      feedback_fn(" - ERROR: connection to %s failed" % (node))
      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
      feedback_fn("  - ERROR: node hasn't returned node connectivity data")
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
          feedback_fn("  - ERROR: communication with node '%s': %s" %
                          (node, node_result['nodelist'][node]))
    hyp_result = node_result.get('hypervisor', None)
    if hyp_result is not None:
      feedback_fn("  - ERROR: hypervisor verify failure: '%s'" % hyp_result)
    return bad

  def _VerifyInstance(self, instance, node_vol_is, node_instance, feedback_fn):
    """Verify an instance.

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

    """
    bad = False

    instancelist = self.cfg.GetInstanceList()
    if not instance in instancelist:
      feedback_fn("  - ERROR: instance %s not in instance list %s" %
                      (instance, instancelist))
      bad = True

    instanceconfig = self.cfg.GetInstanceInfo(instance)
    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':
      if not instance in node_instance[node_current]:
        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

    return not bad

  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

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

    This has no prerequisites.

    """
    pass

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

    """
    bad = False
    feedback_fn("* Verifying global settings")
    self.cfg.VerifyConfig()

833
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
834 835 836 837 838 839 840 841
    vg_name = self.cfg.GetVGName()
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
    node_volume = {}
    node_instance = {}

    # FIXME: verify OS list
    # do local checksums
842 843 844
    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
845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
    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,
      }
    all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param)
    all_rversion = rpc.call_version(nodelist)

    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]

      if type(volumeinfo) != dict:
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

      node_volume[node] = volumeinfo

      # 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

    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      result =  self._VerifyInstance(instance, node_volume, node_instance,
                                     feedback_fn)
      bad = bad or result

      inst_config = self.cfg.GetInstanceInfo(instance)

      inst_config.MapLVsByNode(node_vol_should)

    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

    return int(bad)


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

  """
  if not instance.disks:
    return True

  if not oneshot:
    logger.ToStdout("Waiting for instance %s to sync disks." % instance.name)

  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:
      logger.ToStderr("Can't get any data from node %s" % node)
      retries += 1
      if retries >= 10:
935 936
        raise errors.RemoteError("Can't contact node %s for mirror data,"
                                 " aborting." % node)
Iustin Pop's avatar
Iustin Pop committed
937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014
      time.sleep(6)
      continue
    retries = 0
    for i in range(len(rstats)):
      mstat = rstats[i]
      if mstat is None:
        logger.ToStderr("Can't compute data for node %s/%s" %
                        (node, instance.disks[i].iv_name))
        continue
      perc_done, est_time, is_degraded = mstat
      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"
        logger.ToStdout("- device %s: %5.2f%% done, %s" %
                        (instance.disks[i].iv_name, perc_done, rem_time))
    if done or oneshot:
      break

    if unlock:
      utils.Unlock('cmd')
    try:
      time.sleep(min(60, max_time))
    finally:
      if unlock:
        utils.Lock('cmd')

  if done:
    logger.ToStdout("Instance %s's disks are in sync." % instance.name)
  return not cumul_degraded


def _CheckDiskConsistency(cfgw, dev, node, on_primary):
  """Check that mirrors are not degraded.

  """
  cfgw.SetDiskID(dev, node)

  result = True
  if on_primary or dev.AssembleOnSecondary():
    rstats = rpc.call_blockdev_find(node, dev)
    if not rstats:
      logger.ToStderr("Can't get any data from node %s" % node)
      result = False
    else:
      result = result and (not rstats[5])
  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.

  """
  _OP_REQP = []

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

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

    """
    return

  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:
1015
      raise errors.OpExecError("Can't gather the list of OSes")
Iustin Pop's avatar
Iustin Pop committed
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033
    return node_data


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.

    """
1034 1035 1036
    env = {
      "NODE_NAME": self.op.node_name,
      }
Iustin Pop's avatar
Iustin Pop committed
1037 1038
    all_nodes = self.cfg.GetNodeList()
    all_nodes.remove(self.op.node_name)
1039
    return env, all_nodes, all_nodes
Iustin Pop's avatar
Iustin Pop committed
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058

  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:
      logger.Error("Error: Node '%s' is unknown." % self.op.node_name)
      return 1

    instance_list = self.cfg.GetInstanceList()

1059
    masternode = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
1060
    if node.name == masternode:
1061 1062
      raise errors.OpPrereqError("Node is the master node,"
                                 " you need to failover first.")
Iustin Pop's avatar
Iustin Pop committed
1063 1064 1065 1066

    for instance_name in instance_list:
      instance = self.cfg.GetInstanceInfo(instance_name)
      if node.name == instance.primary_node:
1067 1068
        raise errors.OpPrereqError("Instance %s still running on the node,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1069
      if node.name in instance.secondary_nodes:
1070 1071
        raise errors.OpPrereqError("Instance %s has node as a secondary,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
    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)

    ssh.SSHCall(node.name, 'root', "%s stop" % constants.NODE_INITD_SCRIPT)

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

    self.cfg.RemoveNode(node.name)


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

  """
  _OP_REQP = ["output_fields"]

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

    This checks that the fields required are valid output fields.

    """
    self.dynamic_fields = frozenset(["dtotal", "dfree",
                                     "mtotal", "mnode", "mfree"])

1107 1108 1109
    _CheckOutputFields(static=["name", "pinst", "sinst", "pip", "sip"],
                       dynamic=self.dynamic_fields,
                       selected=self.op.output_fields)
Iustin Pop's avatar
Iustin Pop committed
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 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170


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

    """
    nodenames = utils.NiceSort(self.cfg.GetNodeList())
    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']),
            }
        else:
          live_data[name] = {}
    else:
      live_data = dict.fromkeys(nodenames, {})

    node_to_primary = dict.fromkeys(nodenames, 0)
    node_to_secondary = dict.fromkeys(nodenames, 0)

    if "pinst" in self.op.output_fields or "sinst" in self.op.output_fields:
      instancelist = self.cfg.GetInstanceList()

      for instance in instancelist:
        instanceinfo = self.cfg.GetInstanceInfo(instance)
        node_to_primary[instanceinfo.primary_node] += 1
        for secnode in instanceinfo.secondary_nodes:
          node_to_secondary[secnode] += 1

    # end data gathering

    output = []
    for node in nodelist:
      node_output = []
      for field in self.op.output_fields:
        if field == "name":
          val = node.name
        elif field == "pinst":
          val = node_to_primary[node.name]
        elif field == "sinst":
          val = node_to_secondary[node.name]
        elif field == "pip":
          val = node.primary_ip
        elif field == "sip":
          val = node.secondary_ip
        elif field in self.dynamic_fields:
          val = live_data[node.name].get(field, "?")
        else:
1171
          raise errors.ParameterError(field)
Iustin Pop's avatar
Iustin Pop committed
1172 1173 1174 1175 1176 1177 1178
        val = str(val)
        node_output.append(val)
      output.append(node_output)

    return output


1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
class LUQueryNodeVolumes(NoHooksLU):
  """Logical unit for getting volumes on node(s).

  """
  _OP_REQP = ["nodes", "output_fields"]

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

    This checks that the fields required are valid output fields.

    """
    self.nodes = _GetWantedNodes(self, self.op.nodes)

    _CheckOutputFields(static=["node"],
                       dynamic=["phys", "vg", "name", "size", "instance"],
                       selected=self.op.output_fields)


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

    """
    nodenames = utils.NiceSort([node.name for node in self.nodes])
    volumes = rpc.call_node_volumes(nodenames)

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

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

    output = []
    for node in nodenames:
1212 1213 1214
      if node not in volumes or not volumes[node]:
        continue

1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240
      node_vols = volumes[node][:]
      node_vols.sort(key=lambda vol: vol['dev'])

      for vol in node_vols:
        node_output = []
        for field in self.op.output_fields:
          if field == "node":
            val = node
          elif field == "phys":
            val = vol['dev']
          elif field == "vg":
            val = vol['vg']
          elif field == "name":
            val = vol['name']
          elif field == "size":
            val = int(float(vol['size']))
          elif field == "instance":
            for inst in ilist:
              if node not in lv_by_node[inst]:
                continue
              if vol['name'] in lv_by_node[inst][node]:
                val = inst.name
                break
            else:
              val = '-'
          else:
1241
            raise errors.ParameterError(field)
1242 1243 1244 1245 1246 1247 1248
          node_output.append(str(val))

        output.append(node_output)

    return output


Iustin Pop's avatar
Iustin Pop committed
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
class LUAddNode(LogicalUnit):
  """Logical unit for adding node to the cluster.

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

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

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

    """
    env = {
      "NODE_NAME": self.op.node_name,
      "NODE_PIP": self.op.primary_ip,
      "NODE_SIP": self.op.secondary_ip,
      }
    nodes_0 = self.cfg.GetNodeList()
    nodes_1 = nodes_0 + [self.op.node_name, ]
    return env, nodes_0, nodes_1

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

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

    Any errors are signalled by raising errors.OpPrereqError.

    """
    node_name = self.op.node_name
    cfg = self.cfg

    dns_data = utils.LookupHostname(node_name)
    if not dns_data:
1288
      raise errors.OpPrereqError("Node %s is not resolvable" % node_name)
Iustin Pop's avatar
Iustin Pop committed
1289 1290 1291 1292 1293 1294 1295

    node = dns_data['hostname']
    primary_ip = self.op.primary_ip = dns_data['ip']
    secondary_ip = getattr(self.op, "secondary_ip", None)
    if secondary_ip is None:
      secondary_ip = primary_ip
    if not utils.IsValidIP(secondary_ip):
1296
      raise errors.OpPrereqError("Invalid secondary IP given")
Iustin Pop's avatar
Iustin Pop committed
1297 1298 1299
    self.op.secondary_ip = secondary_ip
    node_list = cfg.GetNodeList()
    if node in node_list:
1300 1301
      raise errors.OpPrereqError("Node %s is already in the configuration"
                                 % node)
Iustin Pop's avatar
Iustin Pop committed
1302 1303 1304 1305 1306 1307 1308

    for existing_node_name in node_list:
      existing_node = cfg.GetNodeInfo(existing_node_name)
      if (existing_node.primary_ip == primary_ip or
          existing_node.secondary_ip == primary_ip or
          existing_node.primary_ip == secondary_ip or
          existing_node.secondary_ip == secondary_ip):
1309 1310
        raise errors.OpPrereqError("New node ip address(es) conflict with"
                                   " existing node %s" % existing_node.name)
Iustin Pop's avatar
Iustin Pop committed
1311 1312 1313

    # check that the type of the node (single versus dual homed) is the
    # same as for the master
1314
    myself = cfg.GetNodeInfo(self.sstore.GetMasterNode())
Iustin Pop's avatar
Iustin Pop committed
1315 1316 1317 1318
    master_singlehomed = myself.secondary_ip == myself.primary_ip
    newbie_singlehomed = secondary_ip == primary_ip
    if master_singlehomed != newbie_singlehomed:
      if master_singlehomed:
1319 1320
        raise errors.OpPrereqError("The master has no private ip but the"
                                   " new node has one")
Iustin Pop's avatar
Iustin Pop committed
1321
      else:
1322 1323
        raise errors.OpPrereqError("The master has a private ip but the"
                                   " new node doesn't have one")
Iustin Pop's avatar
Iustin Pop committed
1324 1325 1326 1327 1328

    # checks reachablity
    command = ["fping", "-q", primary_ip]
    result = utils.RunCmd(command)
    if result.failed:
1329
      raise errors.OpPrereqError("Node not reachable by ping")
Iustin Pop's avatar
Iustin Pop committed
1330 1331 1332 1333 1334 1335

    if not newbie_singlehomed:
      # check reachability from my secondary ip to newbie's secondary ip
      command = ["fping", "-S%s" % myself.secondary_ip, "-q", secondary_ip]
      result = utils.RunCmd(command)
      if result.failed:
1336
        raise errors.OpPrereqError("Node secondary ip not reachable by ping")
Iustin Pop's avatar
Iustin Pop committed
1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351

    self.new_node = objects.Node(name=node,
                                 primary_ip=primary_ip,
                                 secondary_ip=secondary_ip)

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

    """
    new_node = self.new_node
    node = new_node.name

    # set up inter-node password and certificate and restarts the node daemon
    gntpass = self.sstore.GetNodeDaemonPassword()
    if not re.match('^[a-zA-Z0-9.]{1,64}$', gntpass):
1352
      raise errors.OpExecError("ganeti password corruption detected")
Iustin Pop's avatar
Iustin Pop committed
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
    f = open(constants.SSL_CERT_FILE)
    try:
      gntpem = f.read(8192)
    finally:
      f.close()
    # in the base64 pem encoding, neither '!' nor '.' are valid chars,
    # so we use this to detect an invalid certificate; as long as the
    # cert doesn't contain this, the here-document will be correctly
    # parsed by the shell sequence below
    if re.search('^!EOF\.', gntpem, re.MULTILINE):
1363
      raise errors.OpExecError("invalid PEM encoding in the SSL certificate")
Iustin Pop's avatar
Iustin Pop committed
1364
    if not gntpem.endswith("\n"):
1365
      raise errors.OpExecError("PEM must end with newline")
Iustin Pop's avatar
Iustin Pop committed
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383
    logger.Info("copy cluster pass to %s and starting the node daemon" % node)

    # remove first the root's known_hosts file
    utils.RemoveFile("/root/.ssh/known_hosts")
    # and then connect with ssh to set password and start ganeti-noded
    # note that all the below variables are sanitized at this point,
    # either by being constants or by the checks above
    ss = self.sstore
    mycommand = ("umask 077 && "
                 "echo '%s' > '%s' && "
                 "cat > '%s' << '!EOF.' && \n"
                 "%s!EOF.\n%s restart" %
                 (gntpass, ss.KeyToFilename(ss.SS_NODED_PASS),
                  constants.SSL_CERT_FILE, gntpem,
                  constants.NODE_INITD_SCRIPT))

    result = ssh.SSHCall(node, 'root', mycommand, batch=False, ask_key=True)
    if result.failed:
1384 1385 1386
      raise errors.OpExecError("Remote command on node %s, error: %s,"
                               " output: %s" %
                               (node, result.fail_reason, result.output))
Iustin Pop's avatar
Iustin Pop committed
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396

    # check connectivity
    time.sleep(4)

    result = rpc.call_version([node])[node]
    if result:
      if constants.PROTOCOL_VERSION == result:
        logger.Info("communication to node %s fine, sw version %s match" %
                    (node, result))
      else:
1397 1398 1399
        raise errors.OpExecError("Version mismatch master version %s,"
                                 " node version %s" %
                                 (constants.PROTOCOL_VERSION, result))
Iustin Pop's avatar
Iustin Pop committed
1400
    else:
1401
      raise errors.OpExecError("Cannot get version from the new node")
Iustin Pop's avatar
Iustin Pop committed
1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420

    # setup ssh on node
    logger.Info("copy ssh key to node %s" % node)
    keyarray = []
    keyfiles = ["/etc/ssh/ssh_host_dsa_key", "/etc/ssh/ssh_host_dsa_key.pub",
                "/etc/ssh/ssh_host_rsa_key", "/etc/ssh/ssh_host_rsa_key.pub",
                "/root/.ssh/id_dsa", "/root/.ssh/id_dsa.pub"]

    for i in keyfiles:
      f = open(i, 'r')
      try:
        keyarray.append(f.read())
      finally:
        f.close()

    result = rpc.call_node_add(node, keyarray[0], keyarray[1], keyarray[2],
                               keyarray[3], keyarray[4], keyarray[5])

    if not result:
1421
      raise errors.OpExecError("Cannot transfer ssh keys to the new node")
Iustin Pop's avatar
Iustin Pop committed
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431

    # Add node to our /etc/hosts, and add key to known_hosts
    _UpdateEtcHosts(new_node.name, new_node.primary_ip)
    _UpdateKnownHosts(new_node.name, new_node.primary_ip,
                      self.cfg.GetHostKey())

    if new_node.secondary_ip != new_node.primary_ip:
      result = ssh.SSHCall(node, "root",
                           "fping -S 127.0.0.1 -q %s" % new_node.secondary_ip)
      if result.failed:
1432 1433 1434 1435
        raise errors.OpExecError("Node claims it doesn't have the"
                                 " secondary ip you gave (%s).\n"
                                 "Please fix and re-run this command." %
                                 new_node.secondary_ip)
Iustin Pop's avatar
Iustin Pop committed
1436 1437 1438

    # Distribute updated /etc/hosts and known_hosts to all nodes,
    # including the node just added
1439
    myself = self.cfg.GetNodeInfo(self.sstore.GetMasterNode())
Iustin Pop's avatar
Iustin Pop committed
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
    dist_nodes = self.cfg.GetNodeList() + [node]
    if myself.name in dist_nodes:
      dist_nodes.remove(myself.name)

    logger.Debug("Copying hosts and known_hosts to all nodes")
    for fname in ("/etc/hosts", "/etc/ssh/ssh_known_hosts"):
      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))

1452
    to_copy = ss.GetFileList()
Iustin Pop's avatar
Iustin Pop committed
1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492
    for fname in to_copy:
      if not ssh.CopyFileToNode(node, fname):
        logger.Error("could not copy file %s to node %s" % (fname, node))

    logger.Info("adding node %s to cluster.conf" % node)
    self.cfg.AddNode(new_node)


class LUMasterFailover(LogicalUnit):
  """Failover the master node to the current node.

  This is a special LU in that it must run on a non-master node.

  """
  HPATH = "master-failover"
  HTYPE = constants.HTYPE_CLUSTER
  REQ_MASTER = False
  _OP_REQP = []

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

    This will run on the new master only in the pre phase, and on all
    the nodes in the post phase.

    """
    env = {
      "NEW_MASTER": self.new_master,
      "OLD_MASTER": self.old_master,
      }
    return env, [self.new_master], self.cfg.GetNodeList()

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

    This checks that we are not already the master.

    """
    self.new_master = socket.gethostname()

1493
    self.old_master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
1494 1495

    if self.old_master == self.new_master:
1496 1497 1498 1499
      raise errors.OpPrereqError("This commands must be run on the node"
                                 " where you want the new master to be.\n"
                                 "%s is already the master" %
                                 self.old_master)
Iustin Pop's avatar
Iustin Pop committed
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516

  def Exec(self, feedback_fn):
    """Failover the master node.

    This command, when run on a non-master node, will cause the current
    master to cease being master, and the non-master to become new
    master.

    """
    #TODO: do not rely on gethostname returning the FQDN
    logger.Info("setting master to %s, old master: %s" %
                (self.new_master, self.old_master))

    if not rpc.call_node_stop_master(self.old_master):
      logger.Error("could disable the master role on the old master"
                   " %s, please disable manually" % self.old_master)

1517 1518 1519 1520 1521 1522 1523
    ss = self.sstore
    ss.SetKey(ss.SS_MASTER_NODE, self.new_master)
    if not rpc.call_upload_file(self.cfg.GetNodeList(),
                                ss.KeyToFilename(ss.SS_MASTER_NODE)):
      logger.Error("could not distribute the new simple store master file"
                   " to the other nodes, please check.")

Iustin Pop's avatar
Iustin Pop committed
1524 1525 1526
    if not rpc.call_node_start_master(self.new_master):
      logger.Error("could not start the master role on the new master"
                   " %s, please check" % self.new_master)
1527 1528
      feedback_fn("Error in activating the master IP on the new master,\n"
                  "please fix manually.")
Iustin Pop's avatar
Iustin Pop committed
1529 1530 1531 1532 1533 1534 1535 1536



class LUQueryClusterInfo(NoHooksLU):
  """Query cluster configuration.

  """
  _OP_REQP = []
1537
  REQ_MASTER = False
Iustin Pop's avatar
Iustin Pop committed
1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549

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

    """
    pass

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

    """
    result = {
1550
      "name": self.sstore.GetClusterName(),
Iustin Pop's avatar
Iustin Pop committed
1551 1552 1553 1554 1555
      "software_version": constants.RELEASE_VERSION,
      "protocol_version": constants.PROTOCOL_VERSION,
      "config_version": constants.CONFIG_VERSION,
      "os_api_version": constants.OS_API_VERSION,
      "export_version": constants.EXPORT_VERSION,
1556
      "master": self.sstore.GetMasterNode(),
Iustin Pop's avatar
Iustin Pop committed
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577
      "architecture": (platform.architecture()[0], platform.machine()),
      }

    return result


class LUClusterCopyFile(NoHooksLU):
  """Copy file to cluster.

  """
  _OP_REQP = ["nodes", "filename"]

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

    It should check that the named file exists and that the given list
    of nodes is valid.

    """
    if not os.path.exists(self.op.filename):
      raise errors.OpPrereqError("No such filename '%s'" % self.op.filename)
1578 1579

    self.nodes = _GetWantedNodes(self, self.op.nodes)
Iustin Pop's avatar
Iustin Pop committed
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607