Synnefo » snf-ganeti

#

#

# Copyright (C) 2010 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.

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# 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.

"""Node group related commands"""

# pylint: disable-msg=W0401,W0614

# W0401: Wildcard import ganeti.cli

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

from ganeti.cli import *

from ganeti import compat

from ganeti import opcodes

from ganeti import utils

#: default list of fields for L{ListGroups}

_LIST_DEF_FIELDS = ["name", "node_cnt", "pinst_cnt"]

#: headers (and full field list) for L{ListGroups}

_LIST_HEADERS = {

  "name": "Group", "uuid": "UUID",

  "node_cnt": "Nodes", "node_list": "NodeList",

  "pinst_cnt": "Instances", "pinst_list": "InstanceList",

  "ctime": "CTime", "mtime": "MTime", "serial_no": "SerialNo",

}

def AddGroup(opts, args):

  """Add a node group to the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: a list of length 1 with the name of the group to create

  @rtype: int

  @return: the desired exit code

  """

  (group_name,) = args

  op = opcodes.OpAddGroup(group_name=group_name, ndparams=opts.ndparams)

  SubmitOpCode(op, opts=opts)

def ListGroups(opts, args):

  """List node groups and their properties.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: groups to list, or empty for all

  @rtype: int

  @return: the desired exit code

  """

  desired_fields = ParseFields(opts.output, _LIST_DEF_FIELDS)

  output = GetClient().QueryGroups(args, desired_fields, opts.do_locking)

  if opts.no_headers:

    headers = None

  else:

    headers = _LIST_HEADERS

  int_type_fields = frozenset(["node_cnt", "pinst_cnt", "serial_no"])

  list_type_fields = frozenset(["node_list", "pinst_list"])

  date_type_fields = frozenset(["mtime", "ctime"])

  for row in output:

    for idx, field in enumerate(desired_fields):

      val = row[idx]

      if field in list_type_fields:

        val = ",".join(val)

      elif opts.roman_integers and field in int_type_fields:

        val = compat.TryToRoman(val)

      elif field in date_type_fields:

        val = utils.FormatTime(val)

      elif val is None:

        val = "?"

      row[idx] = str(val)

  data = GenerateTable(separator=opts.separator, headers=headers,

                       fields=desired_fields, data=output)

  for line in data:

    ToStdout(line)

  return 0

def SetGroupParams(opts, args):

  """Modifies a node group's parameters.

  @param opts: the command line options seletect by the user

  @type args: list

  @param args: should contain only one element, the node group name

  @rtype: int

  @return: the desired exit code

  """

  all_changes = {

    "ndparams": opts.ndparams,

  }

  if all_changes.values().count(None) == len(all_changes):

    ToStderr("Please give at least one of the parameters.")

    return 1

  op = opcodes.OpSetGroupParams(group_name=args[0], **all_changes)

  result = SubmitOrSend(op, opts)

  if result:

    ToStdout("Modified node group %s", args[0])

    for param, data in result:

      ToStdout(" - %-5s -> %s", param, data)

  return 0

def RemoveGroup(opts, args):

  """Remove a node group from the cluster.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: a list of length 1 with the name of the group to remove

  @rtype: int

  @return: the desired exit code

  """

  (group_name,) = args

  op = opcodes.OpRemoveGroup(group_name=group_name)

  SubmitOpCode(op, opts=opts)

def RenameGroup(opts, args):

  """Rename a node group.

  @param opts: the command line options selected by the user

  @type args: list

  @param args: a list of length 2, [old_name, new_name]

  @rtype: int

  @return: the desired exit code

  """

  old_name, new_name = args

  op = opcodes.OpRenameGroup(old_name=old_name, new_name=new_name)

  SubmitOpCode(op, opts=opts)

commands = {

  "add": (

    AddGroup, ARGS_ONE_GROUP, [DRY_RUN_OPT, NODE_PARAMS_OPT],

    "<group_name>", "Add a new node group to the cluster"),

  "list": (

    ListGroups, ARGS_MANY_GROUPS,

    [NOHDR_OPT, SEP_OPT, FIELDS_OPT, SYNC_OPT, ROMAN_OPT],

    "[<group_name>...]",

    "Lists the node groups in the cluster. The available fields are (see"

    " the man page for details): %s. The default list is (in order): %s." %

    (utils.CommaJoin(_LIST_HEADERS), utils.CommaJoin(_LIST_DEF_FIELDS))),

  "modify": (

    SetGroupParams, ARGS_ONE_GROUP,

    [DRY_RUN_OPT, SUBMIT_OPT, NODE_PARAMS_OPT],

    "<group_name>", "Alters the parameters of a node group"),

  "remove": (

    RemoveGroup, ARGS_ONE_GROUP, [DRY_RUN_OPT],

    "[--dry-run] <group_name>",

    "Remove an (empty) node group from the cluster"),

  "rename": (

    RenameGroup, [ArgGroup(min=2, max=2)], [DRY_RUN_OPT],

    "[--dry-run] <old_name> <new_name>", "Rename a node group"),

}

def Main():

  return GenericMain(commands)