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

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# the Free Software Foundation; either version 2 of the License, or

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# This program is distributed in the hope that it will be useful, but

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

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"""Backup related commands"""

# pylint: disable=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-backup

from ganeti.cli import *

from ganeti import opcodes

from ganeti import constants

from ganeti import errors

def PrintExportList(opts, args):

  """Prints a list of all the exported system images.

  @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

  """

  exports = GetClient().QueryExports(opts.nodes, False)

  retcode = 0

  for node in exports:

    ToStdout("Node: %s", node)

    ToStdout("Exports:")

    if isinstance(exports[node], list):

      for instance_name in exports[node]:

        ToStdout("\t%s", instance_name)

    else:

      ToStdout("  Could not get exports list")

      retcode = 1

  return retcode

def ExportInstance(opts, args):

  """Export an instance to an image in the cluster.

  @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

  """

  ignore_remove_failures = opts.ignore_remove_failures

  if not opts.node:

    raise errors.OpPrereqError("Target node must be specified",

                               errors.ECODE_INVAL)

  op = opcodes.OpBackupExport(instance_name=args[0],

                              target_node=opts.node,

                              shutdown=opts.shutdown,

                              shutdown_timeout=opts.shutdown_timeout,

                              remove_instance=opts.remove_instance,

                              ignore_remove_failures=ignore_remove_failures)

  SubmitOpCode(op, opts=opts)

  return 0

def ImportInstance(opts, args):

  """Add an instance to the cluster.

  This is just a wrapper over GenericInstanceCreate.

  """

  return GenericInstanceCreate(constants.INSTANCE_IMPORT, opts, args)

def RemoveExport(opts, args):

  """Remove an export from the cluster.

  @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

  """

  op = opcodes.OpBackupRemove(instance_name=args[0])

  SubmitOpCode(op, opts=opts)

  return 0

# this is defined separately due to readability only

import_opts = [

  IDENTIFY_DEFAULTS_OPT,

  SRC_DIR_OPT,

  SRC_NODE_OPT,

  IGNORE_IPOLICY_OPT,

  ]

commands = {

  'list': (

    PrintExportList, ARGS_NONE,

    [NODE_LIST_OPT],

    "", "Lists instance exports available in the ganeti cluster"),

  'export': (

    ExportInstance, ARGS_ONE_INSTANCE,

    [FORCE_OPT, SINGLE_NODE_OPT, NOSHUTDOWN_OPT, SHUTDOWN_TIMEOUT_OPT,

     REMOVE_INSTANCE_OPT, IGNORE_REMOVE_FAILURES_OPT, DRY_RUN_OPT,

     PRIORITY_OPT],

    "-n <target_node> [opts...] <name>",

    "Exports an instance to an image"),

  'import': (

    ImportInstance, ARGS_ONE_INSTANCE, COMMON_CREATE_OPTS + import_opts,

    "[...] -t disk-type -n node[:secondary-node] <name>",

    "Imports an instance from an exported image"),

  'remove': (

    RemoveExport, [ArgUnknown(min=1, max=1)], [DRY_RUN_OPT, PRIORITY_OPT],

    "<name>", "Remove exports of named instance from the filesystem."),

  }

def Main():

  return GenericMain(commands)