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#
#

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# Copyright (C) 2006, 2007, 2008, 2010, 2011, 2012 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.
#
# 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.


"""Functions to bootstrap a new cluster.

"""

import os
import os.path
import re
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import logging
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import time
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import tempfile
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from ganeti.cmdlib import cluster
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from ganeti import rpc
from ganeti import ssh
from ganeti import utils
from ganeti import errors
from ganeti import config
from ganeti import constants
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from ganeti import objects
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from ganeti import ssconf
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from ganeti import serializer
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from ganeti import hypervisor
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from ganeti.storage import drbd
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from ganeti.storage import filestorage
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from ganeti import netutils
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from ganeti import luxi
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from ganeti import jstore
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from ganeti import pathutils
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# ec_id for InitConfig's temporary reservation manager
_INITCONF_ECID = "initconfig-ecid"

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#: After how many seconds daemon must be responsive
_DAEMON_READY_TIMEOUT = 10.0

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def _InitSSHSetup():
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  """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.

  """
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  priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.SSH_LOGIN_USER)
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  for name in priv_key, pub_key:
    if os.path.exists(name):
      utils.CreateBackup(name)
    utils.RemoveFile(name)

  result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
                         "-f", priv_key,
                         "-q", "-N", ""])
  if result.failed:
    raise errors.OpExecError("Could not generate ssh keypair, error %s" %
                             result.output)

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  utils.AddAuthorizedKey(auth_keys, utils.ReadFile(pub_key))
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def GenerateHmacKey(file_name):
  """Writes a new HMAC key.

  @type file_name: str
  @param file_name: Path to output file

  """
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  utils.WriteFile(file_name, data="%s\n" % utils.GenerateSecret(), mode=0400,
                  backup=True)


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def GenerateClusterCrypto(new_cluster_cert, new_rapi_cert, new_spice_cert,
                          new_confd_hmac_key, new_cds,
                          rapi_cert_pem=None, spice_cert_pem=None,
                          spice_cacert_pem=None, cds=None,
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                          nodecert_file=pathutils.NODED_CERT_FILE,
                          rapicert_file=pathutils.RAPI_CERT_FILE,
                          spicecert_file=pathutils.SPICE_CERT_FILE,
                          spicecacert_file=pathutils.SPICE_CACERT_FILE,
                          hmackey_file=pathutils.CONFD_HMAC_KEY,
                          cds_file=pathutils.CLUSTER_DOMAIN_SECRET_FILE):
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  """Updates the 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
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  @type new_spice_cert: bool
  @param new_spice_cert: Whether to generate a new SPICE certificate
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  @type new_confd_hmac_key: bool
  @param new_confd_hmac_key: Whether to generate a new HMAC key
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  @type new_cds: bool
  @param new_cds: Whether to generate a new cluster domain secret
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  @type rapi_cert_pem: string
  @param rapi_cert_pem: New RAPI certificate in PEM format
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  @type spice_cert_pem: string
  @param spice_cert_pem: New SPICE certificate in PEM format
  @type spice_cacert_pem: string
  @param spice_cacert_pem: Certificate of the CA that signed the SPICE
                           certificate, in PEM format
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  @type cds: string
  @param cds: New cluster domain secret
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  @type nodecert_file: string
  @param nodecert_file: optional override of the node cert file path
  @type rapicert_file: string
  @param rapicert_file: optional override of the rapi cert file path
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  @type spicecert_file: string
  @param spicecert_file: optional override of the spice cert file path
  @type spicecacert_file: string
  @param spicecacert_file: optional override of the spice CA cert file path
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  @type hmackey_file: string
  @param hmackey_file: optional override of the hmac key file path
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  """
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  # noded SSL certificate
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  cluster_cert_exists = os.path.exists(nodecert_file)
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  if new_cluster_cert or not cluster_cert_exists:
    if cluster_cert_exists:
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      utils.CreateBackup(nodecert_file)
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    logging.debug("Generating new cluster certificate at %s", nodecert_file)
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    utils.GenerateSelfSignedSslCert(nodecert_file)
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  # confd HMAC key
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  if new_confd_hmac_key or not os.path.exists(hmackey_file):
    logging.debug("Writing new confd HMAC key to %s", hmackey_file)
    GenerateHmacKey(hmackey_file)
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  # RAPI
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  rapi_cert_exists = os.path.exists(rapicert_file)
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  if rapi_cert_pem:
    # Assume rapi_pem contains a valid PEM-formatted certificate and key
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    logging.debug("Writing RAPI certificate at %s", rapicert_file)
    utils.WriteFile(rapicert_file, data=rapi_cert_pem, backup=True)
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  elif new_rapi_cert or not rapi_cert_exists:
    if rapi_cert_exists:
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      utils.CreateBackup(rapicert_file)
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    logging.debug("Generating new RAPI certificate at %s", rapicert_file)
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    utils.GenerateSelfSignedSslCert(rapicert_file)
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  # SPICE
  spice_cert_exists = os.path.exists(spicecert_file)
  spice_cacert_exists = os.path.exists(spicecacert_file)
  if spice_cert_pem:
    # spice_cert_pem implies also spice_cacert_pem
    logging.debug("Writing SPICE certificate at %s", spicecert_file)
    utils.WriteFile(spicecert_file, data=spice_cert_pem, backup=True)
    logging.debug("Writing SPICE CA certificate at %s", spicecacert_file)
    utils.WriteFile(spicecacert_file, data=spice_cacert_pem, backup=True)
  elif new_spice_cert or not spice_cert_exists:
    if spice_cert_exists:
      utils.CreateBackup(spicecert_file)
    if spice_cacert_exists:
      utils.CreateBackup(spicecacert_file)

    logging.debug("Generating new self-signed SPICE certificate at %s",
                  spicecert_file)
    (_, cert_pem) = utils.GenerateSelfSignedSslCert(spicecert_file)

    # Self-signed certificate -> the public certificate is also the CA public
    # certificate
    logging.debug("Writing the public certificate to %s",
                  spicecert_file)
    utils.io.WriteFile(spicecacert_file, mode=0400, data=cert_pem)

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  # Cluster domain secret
  if cds:
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    logging.debug("Writing cluster domain secret to %s", cds_file)
    utils.WriteFile(cds_file, data=cds, backup=True)

  elif new_cds or not os.path.exists(cds_file):
    logging.debug("Generating new cluster domain secret at %s", cds_file)
    GenerateHmacKey(cds_file)
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def _InitGanetiServerSetup(master_name):
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  """Setup the necessary configuration for the initial node daemon.

  This creates the nodepass file containing the shared password for
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  the cluster, generates the SSL certificate and starts the node daemon.

  @type master_name: str
  @param master_name: Name of the master node
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  """
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  # Generate cluster secrets
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  GenerateClusterCrypto(True, False, False, False, False)
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  result = utils.RunCmd([pathutils.DAEMON_UTIL, "start", constants.NODED])
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  if result.failed:
    raise errors.OpExecError("Could not start the node daemon, command %s"
                             " had exitcode %s and error %s" %
                             (result.cmd, result.exit_code, result.output))

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  _WaitForNodeDaemon(master_name)


def _WaitForNodeDaemon(node_name):
  """Wait for node daemon to become responsive.

  """
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  def _CheckNodeDaemon():
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    # Pylint bug <http://www.logilab.org/ticket/35642>
    # pylint: disable=E1101
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    result = rpc.BootstrapRunner().call_version([node_name])[node_name]
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    if result.fail_msg:
      raise utils.RetryAgain()
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  try:
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    utils.Retry(_CheckNodeDaemon, 1.0, _DAEMON_READY_TIMEOUT)
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  except utils.RetryTimeout:
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    raise errors.OpExecError("Node daemon on %s didn't answer queries within"
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                             " %s seconds" % (node_name, _DAEMON_READY_TIMEOUT))


def _WaitForMasterDaemon():
  """Wait for master daemon to become responsive.

  """
  def _CheckMasterDaemon():
    try:
      cl = luxi.Client()
      (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])
    except Exception:
      raise utils.RetryAgain()

    logging.debug("Received cluster name %s from master", cluster_name)

  try:
    utils.Retry(_CheckMasterDaemon, 1.0, _DAEMON_READY_TIMEOUT)
  except utils.RetryTimeout:
    raise errors.OpExecError("Master daemon didn't answer queries within"
                             " %s seconds" % _DAEMON_READY_TIMEOUT)
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def _WaitForSshDaemon(hostname, port, family):
  """Wait for SSH daemon to become responsive.

  """
  hostip = netutils.GetHostname(name=hostname, family=family).ip

  def _CheckSshDaemon():
    if netutils.TcpPing(hostip, port, timeout=1.0, live_port_needed=True):
      logging.debug("SSH daemon on %s:%s (IP address %s) has become"
                    " responsive", hostname, port, hostip)
    else:
      raise utils.RetryAgain()

  try:
    utils.Retry(_CheckSshDaemon, 1.0, _DAEMON_READY_TIMEOUT)
  except utils.RetryTimeout:
    raise errors.OpExecError("SSH daemon on %s:%s (IP address %s) didn't"
                             " become responsive within %s seconds" %
                             (hostname, port, hostip, _DAEMON_READY_TIMEOUT))


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def RunNodeSetupCmd(cluster_name, node, basecmd, debug, verbose,
                    use_cluster_key, ask_key, strict_host_check, data):
  """Runs a command to configure something on a remote machine.

  @type cluster_name: string
  @param cluster_name: Cluster name
  @type node: string
  @param node: Node name
  @type basecmd: string
  @param basecmd: Base command (path on the remote machine)
  @type debug: bool
  @param debug: Enable debug output
  @type verbose: bool
  @param verbose: Enable verbose output
  @type use_cluster_key: bool
  @param use_cluster_key: See L{ssh.SshRunner.BuildCmd}
  @type ask_key: bool
  @param ask_key: See L{ssh.SshRunner.BuildCmd}
  @type strict_host_check: bool
  @param strict_host_check: See L{ssh.SshRunner.BuildCmd}
  @param data: JSON-serializable input data for script (passed to stdin)

  """
  cmd = [basecmd]

  # Pass --debug/--verbose to the external script if set on our invocation
  if debug:
    cmd.append("--debug")

  if verbose:
    cmd.append("--verbose")

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  family = ssconf.SimpleStore().GetPrimaryIPFamily()
  srun = ssh.SshRunner(cluster_name,
                       ipv6=(family == netutils.IP6Address.family))
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  scmd = srun.BuildCmd(node, constants.SSH_LOGIN_USER,
                       utils.ShellQuoteArgs(cmd),
                       batch=False, ask_key=ask_key, quiet=False,
                       strict_host_check=strict_host_check,
                       use_cluster_key=use_cluster_key)

  tempfh = tempfile.TemporaryFile()
  try:
    tempfh.write(serializer.DumpJson(data))
    tempfh.seek(0)

    result = utils.RunCmd(scmd, interactive=True, input_fd=tempfh)
  finally:
    tempfh.close()

  if result.failed:
    raise errors.OpExecError("Command '%s' failed: %s" %
                             (result.cmd, result.fail_reason))

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  _WaitForSshDaemon(node, netutils.GetDaemonPort(constants.SSH), family)

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def _InitFileStorageDir(file_storage_dir):
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  """Initialize if needed the file storage.

  @param file_storage_dir: the user-supplied value
  @return: either empty string (if file storage was disabled at build
      time) or the normalized path to the storage directory

  """
  file_storage_dir = os.path.normpath(file_storage_dir)

  if not os.path.isabs(file_storage_dir):
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    raise errors.OpPrereqError("File storage directory '%s' is not an absolute"
                               " path" % file_storage_dir, errors.ECODE_INVAL)
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  if not os.path.exists(file_storage_dir):
    try:
      os.makedirs(file_storage_dir, 0750)
    except OSError, err:
      raise errors.OpPrereqError("Cannot create file storage directory"
                                 " '%s': %s" % (file_storage_dir, err),
                                 errors.ECODE_ENVIRON)

  if not os.path.isdir(file_storage_dir):
    raise errors.OpPrereqError("The file storage directory '%s' is not"
                               " a directory." % file_storage_dir,
                               errors.ECODE_ENVIRON)
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  return file_storage_dir


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def _PrepareFileBasedStorage(
    enabled_disk_templates, file_storage_dir,
    default_dir, file_disk_template,
    init_fn=_InitFileStorageDir, acceptance_fn=None):
  """Checks if a file-base storage type is enabled and inits the dir.

  @type enabled_disk_templates: list of string
  @param enabled_disk_templates: list of enabled disk templates
  @type file_storage_dir: string
  @param file_storage_dir: the file storage directory
  @type default_dir: string
  @param default_dir: default file storage directory when C{file_storage_dir}
      is 'None'
  @type file_disk_template: string
  @param file_disk_template: a disk template whose storage type is 'ST_FILE'
  @rtype: string
  @returns: the name of the actual file storage directory
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  """
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  assert (file_disk_template in
          utils.storage.GetDiskTemplatesOfStorageType(constants.ST_FILE))
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  if file_storage_dir is None:
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    file_storage_dir = default_dir
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  if not acceptance_fn:
    acceptance_fn = \
        lambda path: filestorage.CheckFileStoragePathAcceptance(
            path, exact_match_ok=True)

  cluster.CheckFileStoragePathVsEnabledDiskTemplates(
      logging.warning, file_storage_dir, enabled_disk_templates)

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  file_storage_enabled = file_disk_template in enabled_disk_templates
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  if file_storage_enabled:
    try:
      acceptance_fn(file_storage_dir)
    except errors.FileStoragePathError as e:
      raise errors.OpPrereqError(str(e))
    result_file_storage_dir = init_fn(file_storage_dir)
  else:
    result_file_storage_dir = file_storage_dir
  return result_file_storage_dir


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def _PrepareFileStorage(
    enabled_disk_templates, file_storage_dir, init_fn=_InitFileStorageDir,
    acceptance_fn=None):
  """Checks if file storage is enabled and inits the dir.

  @see: C{_PrepareFileBasedStorage}

  """
  return _PrepareFileBasedStorage(
      enabled_disk_templates, file_storage_dir,
      pathutils.DEFAULT_FILE_STORAGE_DIR, constants.DT_FILE,
      init_fn=init_fn, acceptance_fn=acceptance_fn)


def _PrepareSharedFileStorage(
    enabled_disk_templates, file_storage_dir, init_fn=_InitFileStorageDir,
    acceptance_fn=None):
  """Checks if shared file storage is enabled and inits the dir.

  @see: C{_PrepareFileBasedStorage}

  """
  return _PrepareFileBasedStorage(
      enabled_disk_templates, file_storage_dir,
      pathutils.DEFAULT_SHARED_FILE_STORAGE_DIR, constants.DT_SHARED_FILE,
      init_fn=init_fn, acceptance_fn=acceptance_fn)


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def _InitCheckEnabledDiskTemplates(enabled_disk_templates):
  """Checks the sanity of the enabled disk templates.

  """
  if not enabled_disk_templates:
    raise errors.OpPrereqError("Enabled disk templates list must contain at"
                               " least one member", errors.ECODE_INVAL)
  invalid_disk_templates = \
    set(enabled_disk_templates) - constants.DISK_TEMPLATES
  if invalid_disk_templates:
    raise errors.OpPrereqError("Enabled disk templates list contains invalid"
                               " entries: %s" % invalid_disk_templates,
                               errors.ECODE_INVAL)


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def _RestrictIpolicyToEnabledDiskTemplates(ipolicy, enabled_disk_templates):
  """Restricts the ipolicy's disk templates to the enabled ones.

  This function clears the ipolicy's list of allowed disk templates from the
  ones that are not enabled by the cluster.

  @type ipolicy: dict
  @param ipolicy: the instance policy
  @type enabled_disk_templates: list of string
  @param enabled_disk_templates: the list of cluster-wide enabled disk
    templates

  """
  assert constants.IPOLICY_DTS in ipolicy
  allowed_disk_templates = ipolicy[constants.IPOLICY_DTS]
  restricted_disk_templates = list(set(allowed_disk_templates)
                                   .intersection(set(enabled_disk_templates)))
  ipolicy[constants.IPOLICY_DTS] = restricted_disk_templates


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def InitCluster(cluster_name, mac_prefix, # pylint: disable=R0913, R0914
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                master_netmask, master_netdev, file_storage_dir,
                shared_file_storage_dir, candidate_pool_size, secondary_ip=None,
                vg_name=None, beparams=None, nicparams=None, ndparams=None,
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                hvparams=None, diskparams=None, enabled_hypervisors=None,
                modify_etc_hosts=True, modify_ssh_setup=True,
                maintain_node_health=False, drbd_helper=None, uid_pool=None,
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                default_iallocator=None, primary_ip_version=None, ipolicy=None,
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                prealloc_wipe_disks=False, use_external_mip_script=False,
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                hv_state=None, disk_state=None, enabled_disk_templates=None):
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  """Initialise the cluster.

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  @type candidate_pool_size: int
  @param candidate_pool_size: master candidate pool size
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  @type enabled_disk_templates: list of string
  @param enabled_disk_templates: list of disk_templates to be used in this
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    cluster
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  """
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  # TODO: complete the docstring
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  if config.ConfigWriter.IsCluster():
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    raise errors.OpPrereqError("Cluster is already initialised",
                               errors.ECODE_STATE)
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  if not enabled_hypervisors:
    raise errors.OpPrereqError("Enabled hypervisors list must contain at"
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                               " least one member", errors.ECODE_INVAL)
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  invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
  if invalid_hvs:
    raise errors.OpPrereqError("Enabled hypervisors contains invalid"
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                               " entries: %s" % invalid_hvs,
                               errors.ECODE_INVAL)
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  _InitCheckEnabledDiskTemplates(enabled_disk_templates)
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  try:
    ipcls = netutils.IPAddress.GetClassFromIpVersion(primary_ip_version)
  except errors.ProgrammerError:
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    raise errors.OpPrereqError("Invalid primary ip version: %d." %
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                               primary_ip_version, errors.ECODE_INVAL)
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  hostname = netutils.GetHostname(family=ipcls.family)
  if not ipcls.IsValid(hostname.ip):
    raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
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                               " address." % (hostname.ip, primary_ip_version),
                               errors.ECODE_INVAL)
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  if ipcls.IsLoopback(hostname.ip):
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    raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
                               " address. Please fix DNS or %s." %
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                               (hostname.ip, pathutils.ETC_HOSTS),
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                               errors.ECODE_ENVIRON)
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  if not ipcls.Own(hostname.ip):
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    raise errors.OpPrereqError("Inconsistency: this host's name resolves"
                               " to %s,\nbut this ip address does not"
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                               " belong to this host" %
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                               hostname.ip, errors.ECODE_ENVIRON)
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  clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
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  if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
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    raise errors.OpPrereqError("Cluster IP already active",
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                               errors.ECODE_NOTUNIQUE)
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  if not secondary_ip:
    if primary_ip_version == constants.IP6_VERSION:
      raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
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                                 " IPv4 address must be given as secondary",
                                 errors.ECODE_INVAL)
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    secondary_ip = hostname.ip
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  if not netutils.IP4Address.IsValid(secondary_ip):
    raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
                               " IPv4 address." % secondary_ip,
                               errors.ECODE_INVAL)

  if not netutils.IP4Address.Own(secondary_ip):
    raise errors.OpPrereqError("You gave %s as secondary IP,"
                               " but it does not belong to this host." %
                               secondary_ip, errors.ECODE_ENVIRON)

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  if master_netmask is not None:
    if not ipcls.ValidateNetmask(master_netmask):
      raise errors.OpPrereqError("CIDR netmask (%s) not valid for IPv%s " %
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                                  (master_netmask, primary_ip_version),
                                 errors.ECODE_INVAL)
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  else:
    master_netmask = ipcls.iplen

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  if vg_name:
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    # Check if volume group is valid
    vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
                                          constants.MIN_VG_SIZE)
    if vgstatus:
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      raise errors.OpPrereqError("Error: %s" % vgstatus, errors.ECODE_INVAL)
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  if drbd_helper is not None:
    try:
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      curr_helper = drbd.DRBD8.GetUsermodeHelper()
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    except errors.BlockDeviceError, err:
      raise errors.OpPrereqError("Error while checking drbd helper"
                                 " (specify --no-drbd-storage if you are not"
                                 " using drbd): %s" % str(err),
                                 errors.ECODE_ENVIRON)
    if drbd_helper != curr_helper:
      raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
                                 " is the current helper" % (drbd_helper,
                                                             curr_helper),
                                 errors.ECODE_INVAL)

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  logging.debug("Stopping daemons (if any are running)")
  result = utils.RunCmd([pathutils.DAEMON_UTIL, "stop-all"])
  if result.failed:
    raise errors.OpExecError("Could not stop daemons, command %s"
                             " had exitcode %s and error '%s'" %
                             (result.cmd, result.exit_code, result.output))

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  file_storage_dir = _PrepareFileStorage(enabled_disk_templates,
                                         file_storage_dir)
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  shared_file_storage_dir = _PrepareSharedFileStorage(enabled_disk_templates,
                                                      shared_file_storage_dir)
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  if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
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    raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
                               errors.ECODE_INVAL)
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  result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
  if result.failed:
    raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
                               (master_netdev,
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                                result.output.strip()), errors.ECODE_INVAL)
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  dirs = [(pathutils.RUN_DIR, constants.RUN_DIRS_MODE)]
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  utils.EnsureDirs(dirs)

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  objects.UpgradeBeParams(beparams)
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  utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
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  utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
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  objects.NIC.CheckParameterSyntax(nicparams)
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  full_ipolicy = objects.FillIPolicy(constants.IPOLICY_DEFAULTS, ipolicy)
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  _RestrictIpolicyToEnabledDiskTemplates(full_ipolicy, enabled_disk_templates)
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  if ndparams is not None:
    utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
  else:
    ndparams = dict(constants.NDC_DEFAULTS)

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  # This is ugly, as we modify the dict itself
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  # FIXME: Make utils.ForceDictType pure functional or write a wrapper
  # around it
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  if hv_state:
    for hvname, hvs_data in hv_state.items():
      utils.ForceDictType(hvs_data, constants.HVSTS_PARAMETER_TYPES)
      hv_state[hvname] = objects.Cluster.SimpleFillHvState(hvs_data)
  else:
    hv_state = dict((hvname, constants.HVST_DEFAULTS)
                    for hvname in enabled_hypervisors)

  # FIXME: disk_state has no default values yet
  if disk_state:
    for storage, ds_data in disk_state.items():
      if storage not in constants.DS_VALID_TYPES:
        raise errors.OpPrereqError("Invalid storage type in disk state: %s" %
                                   storage, errors.ECODE_INVAL)
      for ds_name, state in ds_data.items():
        utils.ForceDictType(state, constants.DSS_PARAMETER_TYPES)
        ds_data[ds_name] = objects.Cluster.SimpleFillDiskState(state)

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  # hvparams is a mapping of hypervisor->hvparams dict
  for hv_name, hv_params in hvparams.iteritems():
    utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
    hv_class = hypervisor.GetHypervisor(hv_name)
    hv_class.CheckParameterSyntax(hv_params)
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  # diskparams is a mapping of disk-template->diskparams dict
  for template, dt_params in diskparams.items():
    param_keys = set(dt_params.keys())
    default_param_keys = set(constants.DISK_DT_DEFAULTS[template].keys())
    if not (param_keys <= default_param_keys):
      unknown_params = param_keys - default_param_keys
      raise errors.OpPrereqError("Invalid parameters for disk template %s:"
                                 " %s" % (template,
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                                          utils.CommaJoin(unknown_params)),
                                 errors.ECODE_INVAL)
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    utils.ForceDictType(dt_params, constants.DISK_DT_TYPES)
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    if template == constants.DT_DRBD8 and vg_name is not None:
      # The default METAVG value is equal to the VG name set at init time,
      # if provided
      dt_params[constants.DRBD_DEFAULT_METAVG] = vg_name

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  try:
    utils.VerifyDictOptions(diskparams, constants.DISK_DT_DEFAULTS)
  except errors.OpPrereqError, err:
    raise errors.OpPrereqError("While verify diskparam options: %s" % err,
                               errors.ECODE_INVAL)
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  # set up ssh config and /etc/hosts
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  rsa_sshkey = ""
  dsa_sshkey = ""
  if os.path.isfile(pathutils.SSH_HOST_RSA_PUB):
    sshline = utils.ReadFile(pathutils.SSH_HOST_RSA_PUB)
    rsa_sshkey = sshline.split(" ")[1]
  if os.path.isfile(pathutils.SSH_HOST_DSA_PUB):
    sshline = utils.ReadFile(pathutils.SSH_HOST_DSA_PUB)
    dsa_sshkey = sshline.split(" ")[1]
  if not rsa_sshkey and not dsa_sshkey:
    raise errors.OpPrereqError("Failed to find SSH public keys",
                               errors.ECODE_ENVIRON)
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  if modify_etc_hosts:
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    utils.AddHostToEtcHosts(hostname.name, hostname.ip)
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  if modify_ssh_setup:
    _InitSSHSetup()
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  if default_iallocator is not None:
    alloc_script = utils.FindFile(default_iallocator,
                                  constants.IALLOCATOR_SEARCH_PATH,
                                  os.path.isfile)
    if alloc_script is None:
      raise errors.OpPrereqError("Invalid default iallocator script '%s'"
                                 " specified" % default_iallocator,
                                 errors.ECODE_INVAL)
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  elif constants.HTOOLS:
    # htools was enabled at build-time, we default to it
    if utils.FindFile(constants.IALLOC_HAIL,
                      constants.IALLOCATOR_SEARCH_PATH,
                      os.path.isfile):
      default_iallocator = constants.IALLOC_HAIL
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  now = time.time()

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  # init of cluster config file
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  cluster_config = objects.Cluster(
    serial_no=1,
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    rsahostkeypub=rsa_sshkey,
    dsahostkeypub=dsa_sshkey,
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    highest_used_port=(constants.FIRST_DRBD_PORT - 1),
    mac_prefix=mac_prefix,
    volume_group_name=vg_name,
    tcpudp_port_pool=set(),
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    master_ip=clustername.ip,
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    master_netmask=master_netmask,
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    master_netdev=master_netdev,
    cluster_name=clustername.name,
    file_storage_dir=file_storage_dir,
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    shared_file_storage_dir=shared_file_storage_dir,
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    enabled_hypervisors=enabled_hypervisors,
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    beparams={constants.PP_DEFAULT: beparams},
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    nicparams={constants.PP_DEFAULT: nicparams},
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    ndparams=ndparams,
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    hvparams=hvparams,
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    diskparams=diskparams,
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    candidate_pool_size=candidate_pool_size,
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    modify_etc_hosts=modify_etc_hosts,
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    modify_ssh_setup=modify_ssh_setup,
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    uid_pool=uid_pool,
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    ctime=now,
    mtime=now,
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    maintain_node_health=maintain_node_health,
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    drbd_usermode_helper=drbd_helper,
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    default_iallocator=default_iallocator,
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    primary_ip_family=ipcls.family,
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    prealloc_wipe_disks=prealloc_wipe_disks,
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    use_external_mip_script=use_external_mip_script,
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    ipolicy=full_ipolicy,
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    hv_state_static=hv_state,
    disk_state_static=disk_state,
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    enabled_disk_templates=enabled_disk_templates,
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    )
  master_node_config = objects.Node(name=hostname.name,
                                    primary_ip=hostname.ip,
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                                    secondary_ip=secondary_ip,
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                                    serial_no=1,
                                    master_candidate=True,
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                                    offline=False, drained=False,
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                                    ctime=now, mtime=now,
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                                    )
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  InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
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  cfg = config.ConfigWriter(offline=True)
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  ssh.WriteKnownHostsFile(cfg, pathutils.SSH_KNOWN_HOSTS_FILE)
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  cfg.Update(cfg.GetClusterInfo(), logging.error)
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  ssconf.WriteSsconfFiles(cfg.GetSsconfValues())
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  # set up the inter-node password and certificate
  _InitGanetiServerSetup(hostname.name)
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  logging.debug("Starting daemons")
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  result = utils.RunCmd([pathutils.DAEMON_UTIL, "start-all"])
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  if result.failed:
    raise errors.OpExecError("Could not start daemons, command %s"
                             " had exitcode %s and error %s" %
                             (result.cmd, result.exit_code, result.output))
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  _WaitForMasterDaemon()
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def InitConfig(version, cluster_config, master_node_config,
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               cfg_file=pathutils.CLUSTER_CONF_FILE):
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  """Create the initial cluster configuration.

  It will contain the current node, which will also be the master
  node, and no instances.

  @type version: int
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  @param version: configuration version
  @type cluster_config: L{objects.Cluster}
  @param cluster_config: cluster configuration
  @type master_node_config: L{objects.Node}
  @param master_node_config: master node configuration
  @type cfg_file: string
  @param cfg_file: configuration file path

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  """
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  uuid_generator = config.TemporaryReservationManager()
  cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
                                                _INITCONF_ECID)
  master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
                                                    _INITCONF_ECID)
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  cluster_config.master_node = master_node_config.uuid
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  nodes = {
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    master_node_config.uuid: master_node_config,
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    }
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  default_nodegroup = objects.NodeGroup(
    uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
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    name=constants.INITIAL_NODE_GROUP_NAME,
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    members=[master_node_config.uuid],
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    diskparams={},
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    )
  nodegroups = {
    default_nodegroup.uuid: default_nodegroup,
    }
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  now = time.time()
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  config_data = objects.ConfigData(version=version,
                                   cluster=cluster_config,
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                                   nodegroups=nodegroups,
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                                   nodes=nodes,
                                   instances={},
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                                   networks={},
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                                   serial_no=1,
                                   ctime=now, mtime=now)
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  utils.WriteFile(cfg_file,
                  data=serializer.Dump(config_data.ToDict()),
                  mode=0600)
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def FinalizeClusterDestroy(master_uuid):
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  """Execute the last steps of cluster destroy

  This function shuts down all the daemons, completing the destroy
  begun in cmdlib.LUDestroyOpcode.

  """
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  cfg = config.ConfigWriter()
  modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
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  runner = rpc.BootstrapRunner()

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  master_name = cfg.GetNodeName(master_uuid)

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  master_params = cfg.GetMasterNetworkParameters()
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  master_params.uuid = master_uuid
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  ems = cfg.GetUseExternalMipScript()
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  result = runner.call_node_deactivate_master_ip(master_name, master_params,
                                                 ems)
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  msg = result.fail_msg
  if msg:
    logging.warning("Could not disable the master IP: %s", msg)

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  result = runner.call_node_stop_master(master_name)
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  msg = result.fail_msg
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  if msg:
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    logging.warning("Could not disable the master role: %s", msg)
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  result = runner.call_node_leave_cluster(master_name, modify_ssh_setup)
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  msg = result.fail_msg
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  if msg:
    logging.warning("Could not shutdown the node daemon and cleanup"
                    " the node: %s", msg)
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def SetupNodeDaemon(opts, cluster_name, node):
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  """Add a node to the cluster.

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  This function must be called before the actual opcode, and will ssh
  to the remote node, copy the needed files, and start ganeti-noded,
  allowing the master to do the rest via normal rpc calls.
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  @param cluster_name: the cluster name
  @param node: the name of the new node
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  """
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  data = {
    constants.NDS_CLUSTER_NAME: cluster_name,
    constants.NDS_NODE_DAEMON_CERTIFICATE:
      utils.ReadFile(pathutils.NODED_CERT_FILE),
    constants.NDS_SSCONF: ssconf.SimpleStore().ReadAll(),
    constants.NDS_START_NODE_DAEMON: True,
    }

  RunNodeSetupCmd(cluster_name, node, pathutils.NODE_DAEMON_SETUP,
                  opts.debug, opts.verbose,
                  True, opts.ssh_key_check, opts.ssh_key_check, data)
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  _WaitForNodeDaemon(node)

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def MasterFailover(no_voting=False):
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  """Failover the master node.

  This checks that we are not already the master, and will cause the
  current master to cease being master, and the non-master to become
  new master.

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  @type no_voting: boolean
  @param no_voting: force the operation without remote nodes agreement
                      (dangerous)

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  """
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  sstore = ssconf.SimpleStore()
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  old_master, new_master = ssconf.GetMasterAndMyself(sstore)
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  node_names = sstore.GetNodeList()
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  mc_list = sstore.GetMasterCandidates()
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  if old_master == new_master:
    raise errors.OpPrereqError("This commands must be run on the node"
                               " where you want the new master to be."
                               " %s is already the master" %
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                               old_master, errors.ECODE_INVAL)
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  if new_master not in mc_list:
    mc_no_master = [name for name in mc_list if name != old_master]
    raise errors.OpPrereqError("This node is not among the nodes marked"
                               " as master candidates. Only these nodes"
                               " can become masters. Current list of"
                               " master candidates is:\n"
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                               "%s" % ("\n".join(mc_no_master)),
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                               errors.ECODE_STATE)
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  if not no_voting:
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    vote_list = GatherMasterVotes(node_names)
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    if vote_list:
      voted_master = vote_list[0][0]
      if voted_master is None:
        raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
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                                   " not respond.", errors.ECODE_ENVIRON)
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      elif voted_master != old_master:
        raise errors.OpPrereqError("I have a wrong configuration, I believe"
                                   " the master is %s but the other nodes"
                                   " voted %s. Please resync the configuration"
                                   " of this node." %
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                                   (old_master, voted_master),
                                   errors.ECODE_STATE)
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  # end checks

  rcode = 0

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  logging.info("Setting master to %s, old master: %s", new_master, old_master)
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  try:
    # instantiate a real config writer, as we now know we have the
    # configuration data
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    cfg = config.ConfigWriter(accept_foreign=True)
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    old_master_node = cfg.GetNodeInfoByName(old_master)
    if old_master_node is None:
      raise errors.OpPrereqError("Could not find old master node '%s' in"
                                 " cluster configuration." % old_master,
                                 errors.ECODE_NOENT)

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    cluster_info = cfg.GetClusterInfo()
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    new_master_node = cfg.GetNodeInfoByName(new_master)
    if new_master_node is None:
      raise errors.OpPrereqError("Could not find new master node '%s' in"
                                 " cluster configuration." % new_master,
                                 errors.ECODE_NOENT)

    cluster_info.master_node = new_master_node.uuid
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    # this will also regenerate the ssconf files, since we updated the
    # cluster info
    cfg.Update(cluster_info, logging.error)
  except errors.ConfigurationError, err:
    logging.error("Error while trying to set the new master: %s",
                  str(err))
    return 1

  # if cfg.Update worked, then it means the old master daemon won't be
  # able now to write its own config file (we rely on locking in both
  # backend.UploadFile() and ConfigWriter._Write(); hence the next
  # step is to kill the old master

  logging.info("Stopping the master daemon on node %s", old_master)

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  runner = rpc.BootstrapRunner()
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  master_params = cfg.GetMasterNetworkParameters()
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  master_params.uuid = old_master_node.uuid