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.

import sys

from optparse import make_option

from ganeti.cli import *

from ganeti import cmdlib

from ganeti import opcodes

from ganeti import constants

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

  """

  op = opcodes.OpQueryExports(nodes=opts.nodes)

  exports = SubmitOpCode(op)

  for node in exports:

    print ("Node: %s" % node)

    print ("Exports:")

    for instance_name in exports[node]:

      print ("\t%s" % instance_name)

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]

  op = opcodes.OpCreateInstance(instance_name=instance, mem_size=opts.mem,

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

                                disk_template=opts.disk_template,

                                mode=constants.INSTANCE_IMPORT, pnode=opts.node,

                                snode=opts.snode, vcpus=opts.vcpus,

                                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)

  SubmitOpCode(op)

  return 0

# options used in more than one cmd

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

                       metavar="<node>")

force_opt = make_option("-f", "--force", dest="force", action="store_true",

                        default=False, help="Force the operation")

# this is defined separately due to readability only

import_opts = [

  DEBUG_OPT,

  node_opt,

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

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

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

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

  cli_option("-m", "--memory", dest="mem", help="Memory size",

             default=128, type="unit", metavar="<mem>"),

  make_option("-p", "--cpu", dest="vcpus", help="Number of virtual CPUs",

              default=1, type="int", metavar="<PROC>"),

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

              help="Custom disk setup (diskless, plain, local_raid1 or"

              " remote_raid1)", 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("--secondary-node", dest="snode",

              help="Secondary node for remote_raid1 disk layout",

              metavar="<node>"),

  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>"),

  ]

commands = {

  'list': (PrintExportList, ARGS_NONE,

           [DEBUG_OPT,

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

                        help="List only backups stored on these nodes"),

            ],

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

  'export': (ExportInstance, ARGS_ONE,

             [node_opt, DEBUG_OPT, force_opt,

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

                          action="store_false", default=True,

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

             "[opts...] <name>",

             "Exports an instance to an image"),

  'import': (ImportInstance, ARGS_ONE, import_opts, "[opts...] <name>",

             "Imports an instance from an exported image"),

  }

if __name__ == '__main__':

  retcode = GenericMain(commands)

  sys.exit(retcode)