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#!/usr/bin/python
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#
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# Copyright (C) 2006, 2007 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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# pylint: disable-msg=W0401,W0614
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# W0401: Wildcard import ganeti.cli
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# W0614: Unused import %s from wildcard import (since we need cli)
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import sys
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from optparse import make_option
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from ganeti.cli import *
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from ganeti import opcodes
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from ganeti import constants
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from ganeti import errors
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from ganeti import utils
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_VALUE_TRUE = "true"
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def PrintExportList(opts, args):
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  """Prints a list of all the exported system images.
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  @param opts: the command line options selected by the user
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  @type args: list
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  @param args: should be an empty list
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  @rtype: int
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  @return: the desired exit code
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  """
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  exports = GetClient().QueryExports(opts.nodes, True)
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  retcode = 0
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  for node in exports:
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    ToStdout("Node: %s", node)
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    ToStdout("Exports:")
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    if isinstance(exports[node], list):
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      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
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  return retcode
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def ExportInstance(opts, args):
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  """Export an instance to an image in the cluster.
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  @param opts: the command line options selected by the user
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  @type args: list
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  @param args: should contain only one element, the name
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      of the instance to be exported
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  @rtype: int
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  @return: the desired exit code
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  """
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  op = opcodes.OpExportInstance(instance_name=args[0],
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                                target_node=opts.node,
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                                shutdown=opts.shutdown)
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  SubmitOpCode(op)
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def ImportInstance(opts, args):
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  """Add an instance to the cluster.
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  @param opts: the command line options selected by the user
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  @type args: list
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  @param args: should contain only one element, the new instance name
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  @rtype: int
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  @return: the desired exit code
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  """
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  instance = args[0]
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  (pnode, snode) = SplitNodeOption(opts.node)
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  hypervisor = None
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  hvparams = {}
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  if opts.hypervisor:
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    hypervisor, hvparams = opts.hypervisor
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  if opts.nics:
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    try:
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      nic_max = max(int(nidx[0])+1 for nidx in opts.nics)
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    except ValueError, err:
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      raise errors.OpPrereqError("Invalid NIC index passed: %s" % str(err))
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    nics = [{}] * nic_max
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    for nidx, ndict in opts.nics.items():
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      nidx = int(nidx)
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      nics[nidx] = ndict
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  elif opts.no_nics:
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    # no nics
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    nics = []
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  else:
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    # default of one nic, all auto
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    nics = [{}]
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  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"
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                                 " information passed")
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    disks = []
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  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:
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      raise errors.OpPrereqError("Please use either the '--disk' or"
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                                 " '-s' option")
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    if opts.sd_size is not None:
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      opts.disks = [(0, {"size": opts.sd_size})]
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    try:
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      disk_max = max(int(didx[0])+1 for didx in opts.disks)
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    except ValueError, err:
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      raise errors.OpPrereqError("Invalid disk index passed: %s" % str(err))
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    disks = [{}] * disk_max
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    for didx, ddict in opts.disks:
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      didx = int(didx)
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      if "size" not in ddict:
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        raise errors.OpPrereqError("Missing size for disk %d" % didx)
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      try:
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        ddict["size"] = utils.ParseUnit(ddict["size"])
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      except ValueError, err:
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        raise errors.OpPrereqError("Invalid disk size for disk %d: %s" %
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                                   (didx, err))
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      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,
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                                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,
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                                file_driver=opts.file_driver,
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                                iallocator=opts.iallocator,
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                                hypervisor=hypervisor,
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                                hvparams=hvparams,
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                                beparams=opts.beparams)
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  SubmitOpCode(op)
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  return 0
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def RemoveExport(opts, args):
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  """Remove an export from the cluster.
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  @param opts: the command line options selected by the user
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  @type args: list
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  @param args: should contain only one element, the name of the
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      instance whose backup should be removed
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  @rtype: int
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  @return: the desired exit code
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  """
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  instance = args[0]
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  op = opcodes.OpRemoveExport(instance_name=args[0])
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  SubmitOpCode(op)
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  return 0
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# this is defined separately due to readability only
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import_opts = [
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  DEBUG_OPT,
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  make_option("-n", "--node", dest="node",
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              help="Target node and optional secondary node",
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              metavar="<pnode>[:<snode>]"),
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  keyval_option("-B", "--backend", dest="beparams",
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                type="keyval", default={},
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                help="Backend parameters"),
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  make_option("-t", "--disk-template", dest="disk_template",
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              help="Custom disk setup (diskless, file, plain, drbd)",
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              default=None, metavar="TEMPL"),
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  ikv_option("--disk", help="Disk information",
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             default=[], dest="disks",
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             action="append",
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             type="identkeyval"),
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  cli_option("-s", "--os-size", dest="sd_size", help="Disk size for a"
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             " single-disk configuration, when not using the --disk option,"
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             " in MiB unless a suffix is used",
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             default=None, type="unit", metavar="<size>"),
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  ikv_option("--net", help="NIC information",
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             default=[], dest="nics",
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             action="append",
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             type="identkeyval"),
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  make_option("--no-nics", default=False, action="store_true",
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              help="Do not create any network cards for the instance"),
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  make_option("--no-wait-for-sync", dest="wait_for_sync", default=True,
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              action="store_false", help="Don't wait for sync (DANGEROUS!)"),
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  make_option("--src-node", dest="src_node", help="Source node",
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              metavar="<node>"),
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  make_option("--src-dir", dest="src_dir", help="Source directory",
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              metavar="<dir>"),
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  make_option("--no-ip-check", dest="ip_check", default=True,
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              action="store_false", help="Don't check that the instance's IP"
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              " is alive"),
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  make_option("-I", "--iallocator", metavar="<NAME>",
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              help="Select nodes for the instance automatically using the"
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              " <NAME> iallocator plugin", default=None, type="string"),
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  make_option("--file-storage-dir", dest="file_storage_dir",
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              help="Relative path under default cluster-wide file storage dir"
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              " to store file-based disks", default=None,
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              metavar="<DIR>"),
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  make_option("--file-driver", dest="file_driver", help="Driver to use"
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              " for image files", default="loop", metavar="<DRIVER>"),
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  ikv_option("-H", "--hypervisor", dest="hypervisor",
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              help="Hypervisor and hypervisor options, in the format"
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              " hypervisor:option=value,option=value,...", default=None,
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              type="identkeyval"),
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  ]
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commands = {
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  'list': (PrintExportList, ARGS_NONE,
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           [DEBUG_OPT,
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            make_option("--node", dest="nodes", default=[], action="append",
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                        help="List only backups stored on this node"
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                             " (can be used multiple times)"),
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            ],
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           "", "Lists instance exports available in the ganeti cluster"),
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  'export': (ExportInstance, ARGS_ONE,
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             [DEBUG_OPT, FORCE_OPT,
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              make_option("-n", "--node", dest="node", help="Target node",
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                          metavar="<node>"),
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              make_option("","--noshutdown", dest="shutdown",
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                          action="store_false", default=True,
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                          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, import_opts,
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             ("[...] -t disk-type -n node[:secondary-node]"
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              " <name>"),
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             "Imports an instance from an exported image"),
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  'remove': (RemoveExport, ARGS_ONE,
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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))