gnt-backup 8.7 KB
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#!/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.


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# pylint: disable-msg=W0401,W0614
# W0401: Wildcard import ganeti.cli
# W0614: Unused import %s from wildcard import (since we need cli)

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import sys

from ganeti.cli import *
from ganeti import opcodes
from ganeti import constants
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from ganeti import errors
from ganeti import utils
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_VALUE_TRUE = "true"

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def PrintExportList(opts, args):
  """Prints a list of all the exported system images.

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  @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
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  """
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  exports = GetClient().QueryExports(opts.nodes, False)
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  retcode = 0
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  for node in exports:
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    ToStdout("Node: %s", node)
    ToStdout("Exports:")
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    if isinstance(exports[node], list):
      for instance_name in exports[node]:
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        ToStdout("\t%s", instance_name)
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    else:
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      ToStdout("  Could not get exports list")
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      retcode = 1
  return retcode
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def ExportInstance(opts, args):
  """Export an instance to an image in the cluster.

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  @param opts: the command line options selected by the user
  @type args: list
  @param args: should contain only one element, the name
      of the instance to be exported
  @rtype: int
  @return: the desired exit code
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  """
  op = opcodes.OpExportInstance(instance_name=args[0],
                                target_node=opts.node,
                                shutdown=opts.shutdown)

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  fin_resu, dlist = SubmitOpCode(op)
  if not isinstance(dlist, list):
    ToStderr("Cannot parse execution results")
    return 1
  tot_dsk = len(dlist)
  # TODO: handle diskless instances
  if dlist.count(False) == 0:
    # all OK
    rcode = 0
  elif dlist.count(True) == 0:
    ToStderr("Error: No disks were backed up successfully."
             " The export doesn't have any valid data,"
             " it is recommended to retry the operation.")
    rcode = 1
  else:
    ToStderr("Partial export failure: %d disks backed up, %d disks failed.",
             dlist.count(True), dlist.count(False))
    rcode = 2
  if not fin_resu:
    rcode = 1
  return rcode
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def ImportInstance(opts, args):
  """Add an instance to the cluster.

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  @param opts: the command line options selected by the user
  @type args: list
  @param args: should contain only one element, the new instance name
  @rtype: int
  @return: the desired exit code
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  """
  instance = args[0]

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  (pnode, snode) = SplitNodeOption(opts.node)

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  hypervisor = None
  hvparams = {}
  if opts.hypervisor:
    hypervisor, hvparams = opts.hypervisor

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  if opts.nics:
    try:
      nic_max = max(int(nidx[0])+1 for nidx in opts.nics)
    except ValueError, err:
      raise errors.OpPrereqError("Invalid NIC index passed: %s" % str(err))
    nics = [{}] * nic_max
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    for nidx, ndict in opts.nics:
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      nidx = int(nidx)
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      if not isinstance(ndict, dict):
        msg = "Invalid nic/%d value: expected dict, got %s" % (nidx, ndict)
        raise errors.OpPrereqError(msg)
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      nics[nidx] = ndict
  elif opts.no_nics:
    # no nics
    nics = []
  else:
    # default of one nic, all auto
    nics = [{}]

  if opts.disk_template == constants.DT_DISKLESS:
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    if opts.disks or opts.sd_size is not None:
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      raise errors.OpPrereqError("Diskless instance but disk"
                                 " information passed")
    disks = []
  else:
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    if not opts.disks and not opts.sd_size:
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      raise errors.OpPrereqError("No disk information specified")
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    if opts.disks and opts.sd_size is not None:
      raise errors.OpPrereqError("Please use either the '--disk' or"
                                 " '-s' option")
    if opts.sd_size is not None:
      opts.disks = [(0, {"size": opts.sd_size})]
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    try:
      disk_max = max(int(didx[0])+1 for didx in opts.disks)
    except ValueError, err:
      raise errors.OpPrereqError("Invalid disk index passed: %s" % str(err))
    disks = [{}] * disk_max
    for didx, ddict in opts.disks:
      didx = int(didx)
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      if not isinstance(ddict, dict):
        msg = "Invalid disk/%d value: expected dict, got %s" % (didx, ddict)
        raise errors.OpPrereqError(msg)
      elif "size" not in ddict:
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        raise errors.OpPrereqError("Missing size for disk %d" % didx)
      try:
        ddict["size"] = utils.ParseUnit(ddict["size"])
      except ValueError, err:
        raise errors.OpPrereqError("Invalid disk size for disk %d: %s" %
                                   (didx, err))
      disks[didx] = ddict

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  utils.ForceDictType(opts.beparams, constants.BES_PARAMETER_TYPES)
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  utils.ForceDictType(hvparams, constants.HVS_PARAMETER_TYPES)
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  op = opcodes.OpCreateInstance(instance_name=instance,
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                                disk_template=opts.disk_template,
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                                disks=disks,
                                nics=nics,
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                                mode=constants.INSTANCE_IMPORT,
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                                pnode=pnode, snode=snode,
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                                ip_check=opts.ip_check,
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                                start=False,
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                                src_node=opts.src_node, src_path=opts.src_dir,
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                                wait_for_sync=opts.wait_for_sync,
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                                file_storage_dir=opts.file_storage_dir,
                                file_driver=opts.file_driver,
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                                iallocator=opts.iallocator,
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                                hypervisor=hypervisor,
                                hvparams=hvparams,
                                beparams=opts.beparams)
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  SubmitOpCode(op)
  return 0


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def RemoveExport(opts, args):
  """Remove an export from the cluster.

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  @param opts: the command line options selected by the user
  @type args: list
  @param args: should contain only one element, the name of the
      instance whose backup should be removed
  @rtype: int
  @return: the desired exit code
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  """
  instance = args[0]
  op = opcodes.OpRemoveExport(instance_name=args[0])

  SubmitOpCode(op)
  return 0


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# this is defined separately due to readability only
import_opts = [
  DEBUG_OPT,
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  cli_option("-n", "--node", dest="node",
             help="Target node and optional secondary node",
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             metavar="<pnode>[:<snode>]",
             completion_suggest=OPT_COMPL_INST_ADD_NODES),
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  BACKEND_OPT,
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  DISK_TEMPLATE_OPT,
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  DISK_OPT,
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  OS_SIZE_OPT,
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  NET_OPT,
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  NONICS_OPT,
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  NWSYNC_OPT,
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  cli_option("--src-node", dest="src_node", help="Source node",
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             metavar="<node>",
             completion_suggest=OPT_COMPL_ONE_NODE),
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  cli_option("--src-dir", dest="src_dir", help="Source directory",
             metavar="<dir>"),
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  NOIPCHECK_OPT,
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  IALLOCATOR_OPT,
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  FILESTORE_DIR_OPT,
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  FILESTORE_DRIVER_OPT,
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  HYPERVISOR_OPT,
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  ]

commands = {
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  'list': (PrintExportList, ARGS_NONE,
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           [DEBUG_OPT,
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            cli_option("--node", dest="nodes", default=[], action="append",
                       help="List only backups stored on this node"
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                            " (can be used multiple times)",
                       completion_suggest=OPT_COMPL_ONE_NODE),
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            ],
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           "", "Lists instance exports available in the ganeti cluster"),
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  'export': (ExportInstance, ARGS_ONE_INSTANCE,
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             [DEBUG_OPT, FORCE_OPT,
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              cli_option("-n", "--node", dest="node", help="Target node",
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                         metavar="<node>",
                         completion_suggest=OPT_COMPL_ONE_NODE),
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              cli_option("","--noshutdown", dest="shutdown",
                         action="store_false", default=True,
                         help="Don't shutdown the instance (unsafe)"), ],
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             "-n <target_node> [opts...] <name>",
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             "Exports an instance to an image"),
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  'import': (ImportInstance, ARGS_ONE_INSTANCE, import_opts,
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             ("[...] -t disk-type -n node[:secondary-node]"
              " <name>"),
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             "Imports an instance from an exported image"),
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  'remove': (RemoveExport, [ArgUnknown(min=1, max=1)],
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             [DEBUG_OPT],
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             "<name>",
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             "Remove exports of named instance from the filesystem."),
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  }

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if __name__ == '__main__':
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  sys.exit(GenericMain(commands))