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.

"""OS scripts related commands"""

# pylint: disable-msg=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-os

import sys

from ganeti.cli import *

from ganeti import opcodes

from ganeti import utils

def ListOS(opts, args):

  """List the valid OSes in the cluster.

  @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

  """

  op = opcodes.OpDiagnoseOS(output_fields=["name", "valid", "variants"],

                            names=[])

  result = SubmitOpCode(op, opts=opts)

  if not result:

    ToStderr("Can't get the OS list")

    return 1

  if not opts.no_headers:

    headers = {"name": "Name"}

  else:

    headers = None

  os_names = []

  for (name, valid, variants) in result:

    if valid:

      os_names.extend([[n] for n in CalculateOSNames(name, variants)])

  data = GenerateTable(separator=None, headers=headers, fields=["name"],

                       data=os_names, units=None)

  for line in data:

    ToStdout(line)

  return 0

def _OsStatus(status, diagnose):

  """Beautifier function for OS status.

  @type status: boolean

  @param status: is the OS valid

  @type diagnose: string

  @param diagnose: the error message for invalid OSes

  @rtype: string

  @return: a formatted status

  """

  if status:

    return "valid"

  else:

    return "invalid - %s" % diagnose

def DiagnoseOS(opts, args):

  """Analyse all OSes on this cluster.

  @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

  """

  op = opcodes.OpDiagnoseOS(output_fields=["name", "valid", "variants",

                                           "node_status"], names=[])

  result = SubmitOpCode(op, opts=opts)

  if not result:

    ToStderr("Can't get the OS list")

    return 1

  has_bad = False

  for os_name, _, os_variants, node_data in result:

    nodes_valid = {}

    nodes_bad = {}

    nodes_hidden = {}

    for node_name, node_info in node_data.iteritems():

      nodes_hidden[node_name] = []

      if node_info: # at least one entry in the per-node list

        (first_os_path, first_os_status, first_os_msg,

         first_os_variants, _, first_os_api) = node_info.pop(0)

        if not first_os_variants:

          first_os_variants = []

        first_os_msg = ("%s (path: %s) [variants: %s] [api: %s]" %

                        (_OsStatus(first_os_status, first_os_msg),

                         first_os_path, utils.CommaJoin(first_os_variants),

                         utils.CommaJoin(first_os_api)))

        if first_os_status:

          nodes_valid[node_name] = first_os_msg

        else:

          nodes_bad[node_name] = first_os_msg

        for hpath, hstatus, hmsg, _, _, _ in node_info:

          nodes_hidden[node_name].append("    [hidden] path: %s, status: %s" %

                                         (hpath, _OsStatus(hstatus, hmsg)))

      else:

        nodes_bad[node_name] = "OS not found"

    if nodes_valid and not nodes_bad:

      status = "valid"

    elif not nodes_valid and nodes_bad:

      status = "invalid"

      has_bad = True

    else:

      status = "partial valid"

      has_bad = True

    def _OutputPerNodeOSStatus(msg_map):

      map_k = utils.NiceSort(msg_map.keys())

      for node_name in map_k:

        ToStdout("  Node: %s, status: %s", node_name, msg_map[node_name])

        for msg in nodes_hidden[node_name]:

          ToStdout(msg)

    ToStdout("OS: %s [global status: %s]", os_name, status)

    if os_variants:

      ToStdout("  Variants: [%s]" % utils.CommaJoin(os_variants))

    _OutputPerNodeOSStatus(nodes_valid)

    _OutputPerNodeOSStatus(nodes_bad)

    ToStdout("")

  return int(has_bad)

def ModifyOS(opts, args):

  """Modify OS parameters for one OS.

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

  @type args: list

  @param args: should be a list with one entry

  @rtype: int

  @return: the desired exit code

  """

  os = args[0]

  if opts.hvparams:

    os_hvp = {os: dict(opts.hvparams)}

  else:

    os_hvp = None

  if opts.osparams:

    osp = {os: opts.osparams}

  else:

    osp = None

  if not (os_hvp or osp):

    ToStderr("At least one of OS parameters or hypervisor parameters"

             " must be passed")

    return 1

  op = opcodes.OpSetClusterParams(vg_name=None,

                                  enabled_hypervisors=None,

                                  hvparams=None,

                                  beparams=None,

                                  nicparams=None,

                                  candidate_pool_size=None,

                                  os_hvp=os_hvp,

                                  osparams=osp)

  SubmitOpCode(op)

  return 0

commands = {

  'list': (

    ListOS, ARGS_NONE, [NOHDR_OPT], "", "Lists all valid operating systems"

    " on the cluster"),

  'diagnose': (

    DiagnoseOS, ARGS_NONE, [], "", "Diagnose all operating systems"),

  'modify': (

    ModifyOS, ARGS_ONE_OS, [HVLIST_OPT, OSPARAMS_OPT], "",

    "Modify the OS parameters"),

  }

if __name__ == '__main__':

  sys.exit(GenericMain(commands))