Synnefo » snf-ganeti

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#

# Copyright (C) 2006, 2007, 2010, 2011 Google Inc.

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# 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.

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# 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.

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# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

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# 02110-1301, USA.

"""Cluster related commands"""

# pylint: disable-msg=W0401,W0613,W0614,C0103

# W0401: Wildcard import ganeti.cli

# W0613: Unused argument, since all functions follow the same API

# W0614: Unused import %s from wildcard import (since we need cli)

# C0103: Invalid name gnt-cluster

import os.path

import time

import OpenSSL

import itertools

from ganeti.cli import *

from ganeti import opcodes

from ganeti import constants

from ganeti import errors

from ganeti import utils

from ganeti import bootstrap

from ganeti import ssh

from ganeti import objects

from ganeti import uidpool

from ganeti import compat

from ganeti import netutils

ON_OPT = cli_option("--on", default=False,

                    action="store_true", dest="on",

                    help="Recover from an EPO")

GROUPS_OPT = cli_option("--groups", default=False,

                    action="store_true", dest="groups",

                    help="Arguments are node groups instead of nodes")

_EPO_PING_INTERVAL = 30 # 30 seconds between pings

_EPO_PING_TIMEOUT = 1 # 1 second

_EPO_REACHABLE_TIMEOUT = 15 * 60 # 15 minutes

@UsesRPC

def InitCluster(opts, args):

  """Initialize the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the desired

      cluster name

  @rtype: int

  @return: the desired exit code

  """

  if not opts.lvm_storage and opts.vg_name:

    ToStderr("Options --no-lvm-storage and --vg-name conflict.")

    return 1

  vg_name = opts.vg_name

  if opts.lvm_storage and not opts.vg_name:

    vg_name = constants.DEFAULT_VG

  if not opts.drbd_storage and opts.drbd_helper:

    ToStderr("Options --no-drbd-storage and --drbd-usermode-helper conflict.")

    return 1

  drbd_helper = opts.drbd_helper

  if opts.drbd_storage and not opts.drbd_helper:

    drbd_helper = constants.DEFAULT_DRBD_HELPER

  master_netdev = opts.master_netdev

  if master_netdev is None:

    master_netdev = constants.DEFAULT_BRIDGE

  hvlist = opts.enabled_hypervisors

  if hvlist is None:

    hvlist = constants.DEFAULT_ENABLED_HYPERVISOR

  hvlist = hvlist.split(",")

  hvparams = dict(opts.hvparams)

  beparams = opts.beparams

  nicparams = opts.nicparams

  # prepare beparams dict

  beparams = objects.FillDict(constants.BEC_DEFAULTS, beparams)

  utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)

  # prepare nicparams dict

  nicparams = objects.FillDict(constants.NICC_DEFAULTS, nicparams)

  utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)

  # prepare ndparams dict

  if opts.ndparams is None:

    ndparams = dict(constants.NDC_DEFAULTS)

  else:

    ndparams = objects.FillDict(constants.NDC_DEFAULTS, opts.ndparams)

    utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)

  # prepare hvparams dict

  for hv in constants.HYPER_TYPES:

    if hv not in hvparams:

      hvparams[hv] = {}

    hvparams[hv] = objects.FillDict(constants.HVC_DEFAULTS[hv], hvparams[hv])

    utils.ForceDictType(hvparams[hv], constants.HVS_PARAMETER_TYPES)

  if opts.candidate_pool_size is None:

    opts.candidate_pool_size = constants.MASTER_POOL_SIZE_DEFAULT

  if opts.mac_prefix is None:

    opts.mac_prefix = constants.DEFAULT_MAC_PREFIX

  uid_pool = opts.uid_pool

  if uid_pool is not None:

    uid_pool = uidpool.ParseUidPool(uid_pool)

  if opts.prealloc_wipe_disks is None:

    opts.prealloc_wipe_disks = False

  try:

    primary_ip_version = int(opts.primary_ip_version)

  except (ValueError, TypeError), err:

    ToStderr("Invalid primary ip version value: %s" % str(err))

    return 1

  bootstrap.InitCluster(cluster_name=args[0],

                        secondary_ip=opts.secondary_ip,

                        vg_name=vg_name,

                        mac_prefix=opts.mac_prefix,

                        master_netdev=master_netdev,

                        file_storage_dir=opts.file_storage_dir,

                        enabled_hypervisors=hvlist,

                        hvparams=hvparams,

                        beparams=beparams,

                        nicparams=nicparams,

                        ndparams=ndparams,

                        candidate_pool_size=opts.candidate_pool_size,

                        modify_etc_hosts=opts.modify_etc_hosts,

                        modify_ssh_setup=opts.modify_ssh_setup,

                        maintain_node_health=opts.maintain_node_health,

                        drbd_helper=drbd_helper,

                        uid_pool=uid_pool,

                        default_iallocator=opts.default_iallocator,

                        primary_ip_version=primary_ip_version,

                        prealloc_wipe_disks=opts.prealloc_wipe_disks,

                        )

  op = opcodes.OpClusterPostInit()

  SubmitOpCode(op, opts=opts)

  return 0

@UsesRPC

def DestroyCluster(opts, args):

  """Destroy the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  if not opts.yes_do_it:

    ToStderr("Destroying a cluster is irreversible. If you really want"

             " destroy this cluster, supply the --yes-do-it option.")

    return 1

  op = opcodes.OpClusterDestroy()

  master = SubmitOpCode(op, opts=opts)

  # if we reached this, the opcode didn't fail; we can proceed to

  # shutdown all the daemons

  bootstrap.FinalizeClusterDestroy(master)

  return 0

def RenameCluster(opts, args):

  """Rename the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the new cluster name

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])

  new_name = args[0]

  if not opts.force:

    usertext = ("This will rename the cluster from '%s' to '%s'. If you are"

                " connected over the network to the cluster name, the"

                " operation is very dangerous as the IP address will be"

                " removed from the node and the change may not go through."

                " Continue?") % (cluster_name, new_name)

    if not AskUser(usertext):

      return 1

  op = opcodes.OpClusterRename(name=new_name)

  result = SubmitOpCode(op, opts=opts, cl=cl)

  if result:

    ToStdout("Cluster renamed from '%s' to '%s'", cluster_name, result)

  return 0

def RedistributeConfig(opts, args):

  """Forces push of the cluster configuration.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: empty list

  @rtype: int

  @return: the desired exit code

  """

  op = opcodes.OpClusterRedistConf()

  SubmitOrSend(op, opts)

  return 0

def ShowClusterVersion(opts, args):

  """Write version of ganeti software to the standard output.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  result = cl.QueryClusterInfo()

  ToStdout("Software version: %s", result["software_version"])

  ToStdout("Internode protocol: %s", result["protocol_version"])

  ToStdout("Configuration format: %s", result["config_version"])

  ToStdout("OS api version: %s", result["os_api_version"])

  ToStdout("Export interface: %s", result["export_version"])

  return 0

def ShowClusterMaster(opts, args):

  """Write name of master node to the standard output.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  master = bootstrap.GetMaster()

  ToStdout(master)

  return 0

def _PrintGroupedParams(paramsdict, level=1, roman=False):

  """Print Grouped parameters (be, nic, disk) by group.

  @type paramsdict: dict of dicts

  @param paramsdict: {group: {param: value, ...}, ...}

  @type level: int

  @param level: Level of indention

  """

  indent = "  " * level

  for item, val in sorted(paramsdict.items()):

    if isinstance(val, dict):

      ToStdout("%s- %s:", indent, item)

      _PrintGroupedParams(val, level=level + 1, roman=roman)

    elif roman and isinstance(val, int):

      ToStdout("%s  %s: %s", indent, item, compat.TryToRoman(val))

    else:

      ToStdout("%s  %s: %s", indent, item, val)

def ShowClusterConfig(opts, args):

  """Shows cluster information.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  result = cl.QueryClusterInfo()

  ToStdout("Cluster name: %s", result["name"])

  ToStdout("Cluster UUID: %s", result["uuid"])

  ToStdout("Creation time: %s", utils.FormatTime(result["ctime"]))

  ToStdout("Modification time: %s", utils.FormatTime(result["mtime"]))

  ToStdout("Master node: %s", result["master"])

  ToStdout("Architecture (this node): %s (%s)",

           result["architecture"][0], result["architecture"][1])

  if result["tags"]:

    tags = utils.CommaJoin(utils.NiceSort(result["tags"]))

  else:

    tags = "(none)"

  ToStdout("Tags: %s", tags)

  ToStdout("Default hypervisor: %s", result["default_hypervisor"])

  ToStdout("Enabled hypervisors: %s",

           utils.CommaJoin(result["enabled_hypervisors"]))

  ToStdout("Hypervisor parameters:")

  _PrintGroupedParams(result["hvparams"])

  ToStdout("OS-specific hypervisor parameters:")

  _PrintGroupedParams(result["os_hvp"])

  ToStdout("OS parameters:")

  _PrintGroupedParams(result["osparams"])

  ToStdout("Hidden OSes: %s", utils.CommaJoin(result["hidden_os"]))

  ToStdout("Blacklisted OSes: %s", utils.CommaJoin(result["blacklisted_os"]))

  ToStdout("Cluster parameters:")

  ToStdout("  - candidate pool size: %s",

            compat.TryToRoman(result["candidate_pool_size"],

                              convert=opts.roman_integers))

  ToStdout("  - master netdev: %s", result["master_netdev"])

  ToStdout("  - lvm volume group: %s", result["volume_group_name"])

  if result["reserved_lvs"]:

    reserved_lvs = utils.CommaJoin(result["reserved_lvs"])

  else:

    reserved_lvs = "(none)"

  ToStdout("  - lvm reserved volumes: %s", reserved_lvs)

  ToStdout("  - drbd usermode helper: %s", result["drbd_usermode_helper"])

  ToStdout("  - file storage path: %s", result["file_storage_dir"])

  ToStdout("  - maintenance of node health: %s",

           result["maintain_node_health"])

  ToStdout("  - uid pool: %s",

            uidpool.FormatUidPool(result["uid_pool"],

                                  roman=opts.roman_integers))

  ToStdout("  - default instance allocator: %s", result["default_iallocator"])

  ToStdout("  - primary ip version: %d", result["primary_ip_version"])

  ToStdout("  - preallocation wipe disks: %s", result["prealloc_wipe_disks"])

  ToStdout("Default node parameters:")

  _PrintGroupedParams(result["ndparams"], roman=opts.roman_integers)

  ToStdout("Default instance parameters:")

  _PrintGroupedParams(result["beparams"], roman=opts.roman_integers)

  ToStdout("Default nic parameters:")

  _PrintGroupedParams(result["nicparams"], roman=opts.roman_integers)

  return 0

def ClusterCopyFile(opts, args):

  """Copy a file from master to some nodes.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the path of

      the file to be copied

  @rtype: int

  @return: the desired exit code

  """

  filename = args[0]

  if not os.path.exists(filename):

    raise errors.OpPrereqError("No such filename '%s'" % filename,

                               errors.ECODE_INVAL)

  cl = GetClient()

  cluster_name = cl.QueryConfigValues(["cluster_name"])[0]

  results = GetOnlineNodes(nodes=opts.nodes, cl=cl, filter_master=True,

                           secondary_ips=opts.use_replication_network)

  srun = ssh.SshRunner(cluster_name=cluster_name)

  for node in results:

    if not srun.CopyFileToNode(node, filename):

      ToStderr("Copy of file %s to node %s failed", filename, node)

  return 0

def RunClusterCommand(opts, args):

  """Run a command on some nodes.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain the command to be run and its arguments

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  command = " ".join(args)

  nodes = GetOnlineNodes(nodes=opts.nodes, cl=cl)

  cluster_name, master_node = cl.QueryConfigValues(["cluster_name",

                                                    "master_node"])

  srun = ssh.SshRunner(cluster_name=cluster_name)

  # Make sure master node is at list end

  if master_node in nodes:

    nodes.remove(master_node)

    nodes.append(master_node)

  for name in nodes:

    result = srun.Run(name, "root", command)

    ToStdout("------------------------------------------------")

    ToStdout("node: %s", name)

    ToStdout("%s", result.output)

    ToStdout("return code = %s", result.exit_code)

  return 0

def VerifyCluster(opts, args):

  """Verify integrity of cluster, performing various test on nodes.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  skip_checks = []

  if opts.skip_nplusone_mem:

    skip_checks.append(constants.VERIFY_NPLUSONE_MEM)

  op = opcodes.OpClusterVerify(skip_checks=skip_checks,

                               verbose=opts.verbose,

                               error_codes=opts.error_codes,

                               debug_simulate_errors=opts.simulate_errors)

  if SubmitOpCode(op, opts=opts):

    return 0

  else:

    return 1

def VerifyDisks(opts, args):

  """Verify integrity of cluster disks.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  op = opcodes.OpClusterVerifyDisks()

  result = SubmitOpCode(op, opts=opts, cl=cl)

  if not isinstance(result, (list, tuple)) or len(result) != 3:

    raise errors.ProgrammerError("Unknown result type for OpClusterVerifyDisks")

  bad_nodes, instances, missing = result

  retcode = constants.EXIT_SUCCESS

  if bad_nodes:

    for node, text in bad_nodes.items():

      ToStdout("Error gathering data on node %s: %s",

               node, utils.SafeEncode(text[-400:]))

      retcode |= 1

      ToStdout("You need to fix these nodes first before fixing instances")

  if instances:

    for iname in instances:

      if iname in missing:

        continue

      op = opcodes.OpInstanceActivateDisks(instance_name=iname)

      try:

        ToStdout("Activating disks for instance '%s'", iname)

        SubmitOpCode(op, opts=opts, cl=cl)

      except errors.GenericError, err:

        nret, msg = FormatError(err)

        retcode |= nret

        ToStderr("Error activating disks for instance %s: %s", iname, msg)

  if missing:

    for iname, ival in missing.iteritems():

      all_missing = compat.all(x[0] in bad_nodes for x in ival)

      if all_missing:

        ToStdout("Instance %s cannot be verified as it lives on"

                 " broken nodes", iname)

      else:

        ToStdout("Instance %s has missing logical volumes:", iname)

        ival.sort()

        for node, vol in ival:

          if node in bad_nodes:

            ToStdout("\tbroken node %s /dev/%s", node, vol)

          else:

            ToStdout("\t%s /dev/%s", node, vol)

    ToStdout("You need to run replace or recreate disks for all the above"

             " instances, if this message persist after fixing nodes.")

    retcode |= 1

  return retcode

def RepairDiskSizes(opts, args):

  """Verify sizes of cluster disks.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: optional list of instances to restrict check to

  @rtype: int

  @return: the desired exit code

  """

  op = opcodes.OpClusterRepairDiskSizes(instances=args)

  SubmitOpCode(op, opts=opts)

@UsesRPC

def MasterFailover(opts, args):

  """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.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  if opts.no_voting:

    usertext = ("This will perform the failover even if most other nodes"

                " are down, or if this node is outdated. This is dangerous"

                " as it can lead to a non-consistent cluster. Check the"

                " gnt-cluster(8) man page before proceeding. Continue?")

    if not AskUser(usertext):

      return 1

  return bootstrap.MasterFailover(no_voting=opts.no_voting)

def MasterPing(opts, args):

  """Checks if the master is alive.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  try:

    cl = GetClient()

    cl.QueryClusterInfo()

    return 0

  except Exception: # pylint: disable-msg=W0703

    return 1

def SearchTags(opts, args):

  """Searches the tags on all the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should contain only one element, the tag pattern

  @rtype: int

  @return: the desired exit code

  """

  op = opcodes.OpTagsSearch(pattern=args[0])

  result = SubmitOpCode(op, opts=opts)

  if not result:

    return 1

  result = list(result)

  result.sort()

  for path, tag in result:

    ToStdout("%s %s", path, tag)

def _RenewCrypto(new_cluster_cert, new_rapi_cert, rapi_cert_filename,

                 new_confd_hmac_key, new_cds, cds_filename,

                 force):

  """Renews cluster certificates, keys and secrets.

  @type new_cluster_cert: bool

  @param new_cluster_cert: Whether to generate a new cluster certificate

  @type new_rapi_cert: bool

  @param new_rapi_cert: Whether to generate a new RAPI certificate

  @type rapi_cert_filename: string

  @param rapi_cert_filename: Path to file containing new RAPI certificate

  @type new_confd_hmac_key: bool

  @param new_confd_hmac_key: Whether to generate a new HMAC key

  @type new_cds: bool

  @param new_cds: Whether to generate a new cluster domain secret

  @type cds_filename: string

  @param cds_filename: Path to file containing new cluster domain secret

  @type force: bool

  @param force: Whether to ask user for confirmation

  """

  if new_rapi_cert and rapi_cert_filename:

    ToStderr("Only one of the --new-rapi-certficate and --rapi-certificate"

             " options can be specified at the same time.")

    return 1

  if new_cds and cds_filename:

    ToStderr("Only one of the --new-cluster-domain-secret and"

             " --cluster-domain-secret options can be specified at"

             " the same time.")

    return 1

  if rapi_cert_filename:

    # Read and verify new certificate

    try:

      rapi_cert_pem = utils.ReadFile(rapi_cert_filename)

      OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM,

                                      rapi_cert_pem)

    except Exception, err: # pylint: disable-msg=W0703

      ToStderr("Can't load new RAPI certificate from %s: %s" %

               (rapi_cert_filename, str(err)))

      return 1

    try:

      OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, rapi_cert_pem)

    except Exception, err: # pylint: disable-msg=W0703

      ToStderr("Can't load new RAPI private key from %s: %s" %

               (rapi_cert_filename, str(err)))

      return 1

  else:

    rapi_cert_pem = None

  if cds_filename:

    try:

      cds = utils.ReadFile(cds_filename)

    except Exception, err: # pylint: disable-msg=W0703

      ToStderr("Can't load new cluster domain secret from %s: %s" %

               (cds_filename, str(err)))

      return 1

  else:

    cds = None

  if not force:

    usertext = ("This requires all daemons on all nodes to be restarted and"

                " may take some time. Continue?")

    if not AskUser(usertext):

      return 1

  def _RenewCryptoInner(ctx):

    ctx.feedback_fn("Updating certificates and keys")

    bootstrap.GenerateClusterCrypto(new_cluster_cert, new_rapi_cert,

                                    new_confd_hmac_key,

                                    new_cds,

                                    rapi_cert_pem=rapi_cert_pem,

                                    cds=cds)

    files_to_copy = []

    if new_cluster_cert:

      files_to_copy.append(constants.NODED_CERT_FILE)

    if new_rapi_cert or rapi_cert_pem:

      files_to_copy.append(constants.RAPI_CERT_FILE)

    if new_confd_hmac_key:

      files_to_copy.append(constants.CONFD_HMAC_KEY)

    if new_cds or cds:

      files_to_copy.append(constants.CLUSTER_DOMAIN_SECRET_FILE)

    if files_to_copy:

      for node_name in ctx.nonmaster_nodes:

        ctx.feedback_fn("Copying %s to %s" %

                        (", ".join(files_to_copy), node_name))

        for file_name in files_to_copy:

          ctx.ssh.CopyFileToNode(node_name, file_name)

  RunWhileClusterStopped(ToStdout, _RenewCryptoInner)

  ToStdout("All requested certificates and keys have been replaced."

           " Running \"gnt-cluster verify\" now is recommended.")

  return 0

def RenewCrypto(opts, args):

  """Renews cluster certificates, keys and secrets.

  """

  return _RenewCrypto(opts.new_cluster_cert,

                      opts.new_rapi_cert,

                      opts.rapi_cert,

                      opts.new_confd_hmac_key,

                      opts.new_cluster_domain_secret,

                      opts.cluster_domain_secret,

                      opts.force)

def SetClusterParams(opts, args):

  """Modify the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: should be an empty list

  @rtype: int

  @return: the desired exit code

  """

  if not (not opts.lvm_storage or opts.vg_name or

          not opts.drbd_storage or opts.drbd_helper or

          opts.enabled_hypervisors or opts.hvparams or

          opts.beparams or opts.nicparams or opts.ndparams or

          opts.candidate_pool_size is not None or

          opts.uid_pool is not None or

          opts.maintain_node_health is not None or

          opts.add_uids is not None or

          opts.remove_uids is not None or

          opts.default_iallocator is not None or

          opts.reserved_lvs is not None or

          opts.master_netdev is not None or

          opts.prealloc_wipe_disks is not None):

    ToStderr("Please give at least one of the parameters.")

    return 1

  vg_name = opts.vg_name