Synnefo » snf-ganeti

#!/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.

# pylint: disable-msg=W0401,W0614

# W0401: Wildcard import ganeti.cli

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

import sys

from optparse import make_option

from ganeti.cli import *

from ganeti import opcodes

from ganeti import constants

_VALUE_TRUE = "true"

def PrintExportList(opts, args):

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

  Args:

   opts - class with options as members (should be empty)

   args - should be empty

  Returns:

    nothing

  """

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

  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")

def ExportInstance(opts, args):

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

  Args:

   opts - class with options as members

   args - list with a single element, the instance name

  Returns:

    1 in case of error, 0 otherwise

  """

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

                                target_node=opts.node,

                                shutdown=opts.shutdown)

  SubmitOpCode(op)

def ImportInstance(opts, args):

  """Add an instance to the cluster.

  Args:

   opts - class with options as members

   args - list with a single element, the new instance name

  Opts used:

   memory - amount of memory to allocate to instance (MiB)

   size - amount of disk space to allocate to instance (MiB)

   os - which OS to run on instance

   node - node to run new instance on

   src_node - node containing the export

   src_dir - directory on the old node with the export in it

  Returns:

    1 in case of error, 0 otherwise

  """

  instance = args[0]

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

  hypervisor = None

  hvparams = {}

  if opts.hypervisor:

    hypervisor, hvparams = opts.hypervisor

  ValidateBeParams(opts.beparams)

  op = opcodes.OpCreateInstance(instance_name=instance,

                                disk_size=opts.size, swap_size=opts.swap,

                                disk_template=opts.disk_template,

                                mode=constants.INSTANCE_IMPORT,

                                pnode=pnode, snode=snode,

                                ip_check=opts.ip_check,

                                ip=opts.ip, bridge=opts.bridge, start=False,

                                src_node=opts.src_node, src_path=opts.src_dir,

                                wait_for_sync=opts.wait_for_sync, mac="auto",

                                file_storage_dir=opts.file_storage_dir,

                                file_driver=opts.file_driver,

                                iallocator=opts.iallocator,

                                hypervisor=hypervisor,

                                hvparams=hvparams,

                                beparams=opts.beparams)

  SubmitOpCode(op)

  return 0

def RemoveExport(opts, args):

  """Remove an export from the cluster.

  Args:

   opts - class with options as members

   args - list with a single element, the exported instance to remove

  Opts used:

  Returns:

    1 in case of error, 0 otherwise

  """

  instance = args[0]

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

  SubmitOpCode(op)

  return 0

# this is defined separately due to readability only

import_opts = [

  DEBUG_OPT,

  make_option("-n", "--node", dest="node",

              help="Target node and optional secondary node",

              metavar="<pnode>[:<snode>]"),

  cli_option("-s", "--os-size", dest="size", help="Disk size, in MiB unless"

             " a suffix is used",

             default=20 * 1024, type="unit", metavar="<size>"),

  cli_option("--swap-size", dest="swap", help="Swap size",

             default=4 * 1024, type="unit", metavar="<size>"),

  keyval_option("-B", "--backend", dest="beparams",

                type="keyval", default={},

                help="Backend parameters"),

  make_option("-t", "--disk-template", dest="disk_template",

              help="Custom disk setup (diskless, file, plain, drbd)",

              default=None, metavar="TEMPL"),

  make_option("-i", "--ip", dest="ip",

              help="IP address ('none' [default], 'auto', or specify address)",

              default='none', type="string", metavar="<ADDRESS>"),

  make_option("--no-wait-for-sync", dest="wait_for_sync", default=True,

              action="store_false", help="Don't wait for sync (DANGEROUS!)"),

  make_option("-b", "--bridge", dest="bridge",

              help="Bridge to connect this instance to",

              default=None, metavar="<bridge>"),

  make_option("--src-node", dest="src_node", help="Source node",

              metavar="<node>"),

  make_option("--src-dir", dest="src_dir", help="Source directory",

              metavar="<dir>"),

  make_option("--no-ip-check", dest="ip_check", default=True,

              action="store_false", help="Don't check that the instance's IP"

              " is alive"),

  make_option("--iallocator", metavar="<NAME>",

              help="Select nodes for the instance automatically using the"

              " <NAME> iallocator plugin", default=None, type="string"),

  make_option("--file-storage-dir", dest="file_storage_dir",

              help="Relative path under default cluster-wide file storage dir"

              " to store file-based disks", default=None,

              metavar="<DIR>"),

  make_option("--file-driver", dest="file_driver", help="Driver to use"

              " for image files", default="loop", metavar="<DRIVER>"),

  ikv_option("-H", "--hypervisor", dest="hypervisor",

              help="Hypervisor and hypervisor options, in the format"

              " hypervisor:option=value,option=value,...", default=None,

              type="identkeyval"),

  ]

commands = {

  'list': (PrintExportList, ARGS_NONE,

           [DEBUG_OPT,

            make_option("--node", dest="nodes", default=[], action="append",

                        help="List only backups stored on this node"

                             " (can be used multiple times)"),

            ],

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

  'export': (ExportInstance, ARGS_ONE,

             [DEBUG_OPT, FORCE_OPT,

              make_option("-n", "--node", dest="node", help="Target node",

                          metavar="<node>"),

              make_option("","--noshutdown", dest="shutdown",

                          action="store_false", default=True,

                          help="Don't shutdown the instance (unsafe)"), ],

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

             "Exports an instance to an image"),

  'import': (ImportInstance, ARGS_ONE, import_opts,

             ("[...] -t disk-type -n node[:secondary-node]"

              " --src-node node --src-dir dir"

              " <name>"),

             "Imports an instance from an exported image"),

  'remove': (RemoveExport, ARGS_ONE,

             [DEBUG_OPT],

             "<name>",

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

  }

if __name__ == '__main__':

  sys.exit(GenericMain(commands))