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 opcodes

from ganeti import logger

from ganeti import objects

from ganeti import utils

from ganeti import errors

def _DiagnoseOSValid(obj):

  """Verify whether an OS diagnose object represents a valid OS

    Args:

      obj: an diagnostic object as returned by OpDiagnoseOS

    Returns:

      bool: OS validity status

  """

  if isinstance(obj, objects.OS):

    return True

  elif isinstance(obj, errors.InvalidOS):

    return False

  else:

    raise errors.ProgrammerError("unknown OS diagnose type: '%s'" % type(obj))

def _DiagnoseOSName(obj):

  """Generate a status message for an OS diagnose object.

    Args:

      obj: an diagnostic object as returned by OpDiagnoseOS

    Returns:

      string: the name of the OS in question

  """

  if _DiagnoseOSValid(obj):

    return obj.name

  else:

    return obj.args[0]

def _DiagnoseOSStatus(obj):

  """Generate a status message for an OS diagnose object.

    Args:

      obj: an diagnostic object as returned by OpDiagnoseOS

    Returns:

      string: a description of the OS status

  """

  if _DiagnoseOSValid(obj):

    return "valid"

  else:

    return obj.args[2]

def _DiagnoseOSPath(obj):

  """Get the path out of an OS diagnose object.

    Args:

      obj: an diagnostic object as returned by OpDiagnoseOS

    Returns:

      string: the OS path

  """

  if _DiagnoseOSValid(obj):

    return obj.path

  else:

    return obj.args[1]

def _DiagnoseByOS(rlist):

  """Remap an OpDiagnoseOS() return list into an a per-os per-node dictionary

    Args:

      rlist: a map with nodes as keys and diagnoseobjects as values

    Returns:

      map: a map with osnames as keys and as value another map, with nodes as

           keys and diagnoseobjects as values

           e.g. {"debian-etch": {"node1": <object>, "node2": <object>}}

  """

  all_os = {}

  for node_name, nr in rlist.iteritems():

    if not nr:

      continue

    for obj in nr:

      os_name = _DiagnoseOSName(obj)

      if os_name not in all_os:

        all_os[os_name] = {}

      if node_name not in all_os[os_name]:

        all_os[os_name][node_name] = []

      all_os[os_name][node_name].append(obj)

  return all_os

def ListOS(opts, args):

  """List the OSes existing on this node.

  """

  op = opcodes.OpDiagnoseOS()

  result = SubmitOpCode(op)

  if not result:

    logger.ToStdout("Can't get the OS list")

    return 1

  node_data = result

  num_nodes = len(node_data)

  all_os = _DiagnoseByOS(node_data)

  valid_os = []

  for os_name, os_node_data in all_os.iteritems():

    if len(os_node_data) != num_nodes:

      continue

    if utils.all(os_node_data.values(), lambda l: _DiagnoseOSValid(l[0])):

      valid_os.append(os_name)

  if not opts.no_headers:

    headers = {"name": "Name"}

  else:

    headers = None

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

                       data=[[os] for os in valid_os])

  for line in data:

    logger.ToStdout(line)

  return 0

def DiagnoseOS(opts, args):

  """Analyse all OSes on this cluster.

  """

  op = opcodes.OpDiagnoseOS()

  result = SubmitOpCode(op)

  if not result:

    logger.ToStdout("Can't get the OS list")

    return 1

  node_data = result

  all_os = _DiagnoseByOS(node_data)

  has_bad = False

  for os_name in all_os:

    nodes_valid = {}

    nodes_bad = {}

    for node_name in node_data:

      if node_name in all_os[os_name]:

        first_os = all_os[os_name][node_name].pop(0)

        first_os_msg = ("%s (path: %s)" %

                        (_DiagnoseOSStatus(first_os),

                         _DiagnoseOSPath(first_os)))

        if _DiagnoseOSValid(first_os):

          nodes_valid[node_name] = first_os_msg

        else:

          nodes_bad[node_name] = first_os_msg

      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 _OutputNodeHiddenOSStatus(dobj_list):

      for dobj in dobj_list:

        logger.ToStdout("    [hidden] path: %s, status: %s" % 

                        (_DiagnoseOSPath(dobj), _DiagnoseOSStatus(dobj)))

    def _OutputPerNodeOSStatus(msg_map):

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

      for node_name in map_k:

        logger.ToStdout("  Node: %s, status: %s" % 

                        (node_name, msg_map[node_name]))

        if node_name in all_os[os_name]:

          _OutputNodeHiddenOSStatus(all_os[os_name][node_name])

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

    _OutputPerNodeOSStatus(nodes_valid)

    _OutputPerNodeOSStatus(nodes_bad)

  return int(has_bad)

commands = {

  'list': (ListOS, ARGS_NONE, [DEBUG_OPT, NOHDR_OPT], "",

           "Lists all valid OSes on the master"),

  'diagnose': (DiagnoseOS, ARGS_NONE, [DEBUG_OPT], "",

               "Diagnose all OSes"),

  }

if __name__ == '__main__':

  sys.exit(GenericMain(commands))