Synnefo » snf-ganeti

#!/usr/bin/python

#

# 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.

#

# 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.

# pylint: disable-msg=C0103

"""Tool to sanitize/randomize the configuration file.

"""

import sys

import os

import os.path

import optparse

from ganeti import constants

from ganeti import serializer

from ganeti import utils

from ganeti import cli

from ganeti.cli import cli_option

OPTS = [

  cli.VERBOSE_OPT,

  cli_option("--path", help="Convert this configuration file"

             " instead of '%s'" % constants.CLUSTER_CONF_FILE,

             default=constants.CLUSTER_CONF_FILE, dest="CONFIG_DATA_PATH"),

  cli_option("--sanitize-names", default="yes", type="bool",

             help="Randomize the cluster, node and instance names [yes]"),

  cli_option("--sanitize-ips", default="yes", type="bool",

             help="Randomize the cluster, node and instance IPs [yes]"),

  cli_option("--sanitize-lvs", default="no", type="bool",

             help="Randomize the LV names (for old clusters) [no]"),

  cli_option("--sanitize-os-names", default="yes", type="bool",

             help="Randomize the OS names [yes]"),

  cli_option("--no-randomization", default=False, action="store_true",

             help="Disable all name randomization (only randomize secrets)"),

  cli_option("--base-domain", default="example.com",

             help="The base domain used for new names [example.com]"),

  ]

def Error(txt, *args):

  """Writes a message to standard error and exits.

  """

  cli.ToStderr(txt, *args)

  sys.exit(1)

def GenerateNameMap(opts, names, base):

  """For a given set of names, generate a list of sane new names.

  """

  names = utils.NiceSort(names)

  name_map = {}

  for idx, old_name in enumerate(names):

    new_name = "%s%d.%s" % (base, idx + 1, opts.base_domain)

    if new_name in names:

      Error("Name conflict for %s: %s already exists", base, new_name)

    name_map[old_name] = new_name

  return name_map

def SanitizeSecrets(opts, cfg): # pylint: disable-msg=W0613

  """Cleanup configuration secrets.

  """

  cfg["cluster"]["rsahostkeypub"] = ""

  for instance in cfg["instances"].values():

    for disk in instance["disks"]:

      RandomizeDiskSecrets(disk)

def SanitizeCluster(opts, cfg):

  """Sanitize the cluster names.

  """

  cfg["cluster"]["cluster_name"] = "cluster." + opts.base_domain

def SanitizeNodes(opts, cfg):

  """Sanitize node names.

  """

  old_names = cfg["nodes"].keys()

  old_map = GenerateNameMap(opts, old_names, "node")

  # rename nodes

  RenameDictKeys(cfg["nodes"], old_map, True)

  # update master node

  cfg["cluster"]["master_node"] = old_map[cfg["cluster"]["master_node"]]

  # update instance configuration

  for instance in cfg["instances"].values():

    instance["primary_node"] = old_map[instance["primary_node"]]

    for disk in instance["disks"]:

      RenameDiskNodes(disk, old_map)

def SanitizeInstances(opts, cfg):

  """Sanitize instance names.

  """

  old_names = cfg["instances"].keys()

  old_map = GenerateNameMap(opts, old_names, "instance")

  RenameDictKeys(cfg["instances"], old_map, True)

def SanitizeIps(opts, cfg): # pylint: disable-msg=W0613

  """Sanitize the IP names.

  @note: we're interested in obscuring the old IPs, not in generating

      actually valid new IPs, so we chose to simply put IPv4

      addresses, irrelevant of whether IPv6 or IPv4 addresses existed

      before.

  """

  def _Get(old):

    if old in ip_map:

      return ip_map[old]

    idx = len(ip_map) + 1

    rest, d_octet = divmod(idx, 256)

    rest, c_octet = divmod(rest, 256)

    rest, b_octet = divmod(rest, 256)

    if rest > 0:

      Error("Too many IPs!")

    new_ip = "%d.%d.%d.%d" % (10, b_octet, c_octet, d_octet)

    ip_map[old] = new_ip

    return new_ip

  ip_map = {}

  cfg["cluster"]["master_ip"] = _Get(cfg["cluster"]["master_ip"])

  for node in cfg["nodes"].values():

    node["primary_ip"] = _Get(node["primary_ip"])

    node["secondary_ip"] = _Get(node["secondary_ip"])

  for instance in cfg["instances"].values():

    for nic in instance["nics"]:

      if "ip" in nic and nic["ip"]:

        nic["ip"] = _Get(nic["ip"])

def SanitizeOsNames(opts, cfg): # pylint: disable-msg=W0613

  """Sanitize the OS names.

  """

  def _Get(old):

    if old in os_map:

      return os_map[old]

    os_map[old] = "ganeti-os%d" % (len(os_map) + 1)

    return os_map[old]

  os_map = {}

  for instance in cfg["instances"].values():

    instance["os"] = _Get(instance["os"])

  if "os_hvp" in cfg["cluster"]:

    for os_name in cfg["cluster"]["os_hvp"]:

      # force population of the entire os map

      _Get(os_name)

    RenameDictKeys(cfg["cluster"]["os_hvp"], os_map, False)

def SanitizeDisks(opts, cfg): # pylint: disable-msg=W0613

  """Cleanup disks disks.

  """

  def _Get(old):

    if old in lv_map:

      return old

    lv_map[old] = utils.NewUUID()

    return lv_map[old]

  def helper(disk):

    if "children" in disk and disk["children"]:

      for child in disk["children"]:

        helper(child)

    if disk["dev_type"] == constants.LD_DRBD8:

      if "physical_id" in disk:

        del disk["physical_id"]

    if disk["dev_type"] == constants.LD_LV and opts.sanitize_lvs:

      disk["logical_id"][1] = _Get(disk["logical_id"][1])

      disk["physical_id"][1] = disk["logical_id"][1]

  lv_map = {}

  for instance in cfg["instances"].values():

    for disk in instance["disks"]:

      helper(disk)

def RandomizeDiskSecrets(disk):

  """Randomize a disks' secrets (if any).

  """

  if "children" in disk and disk["children"]:

    for child in disk["children"]:

      RandomizeDiskSecrets(child)

  # only disk type to contain secrets is the drbd one

  if disk["dev_type"] == constants.LD_DRBD8:

    disk["logical_id"][5] = utils.GenerateSecret()

def RenameDiskNodes(disk, node_map):

  """Rename nodes in the disk config.

  """

  if "children" in disk and disk["children"]:

    for child in disk["children"]:

      RenameDiskNodes(child, node_map)

  # only disk type to contain nodes is the drbd one

  if disk["dev_type"] == constants.LD_DRBD8:

    lid = disk["logical_id"]

    lid[0] = node_map[lid[0]]

    lid[1] = node_map[lid[1]]

def RenameDictKeys(a_dict, name_map, update_name):

  """Rename the dictionary keys based on a name map.

  """

  for old_name in a_dict.keys():

    new_name = name_map[old_name]

    a_dict[new_name] = a_dict[old_name]

    del a_dict[old_name]

    if update_name:

      a_dict[new_name]["name"] = new_name

def main():

  """Main program.

  """

  # Option parsing

  parser = optparse.OptionParser(usage="%prog [--verbose] output_file")

  for o in OPTS:

    parser.add_option(o)

  (opts, args) = parser.parse_args()

  if opts.no_randomization:

    opts.sanitize_names = opts.sanitize_ips = opts.sanitize_os_names = \

        opts.sanitize_lvs = False

  # Option checking

  if len(args) != 1:

    Error("Usage: sanitize-config [options] {<output_file> | -}")

  # Check whether it's a Ganeti configuration directory

  if not os.path.isfile(opts.CONFIG_DATA_PATH):

    Error("Cannot find Ganeti configuration file %s", opts.CONFIG_DATA_PATH)

  config_data = serializer.LoadJson(utils.ReadFile(opts.CONFIG_DATA_PATH))

  # first, do some disk cleanup: remove DRBD physical_ids, since it

  # contains both IPs (which we want changed) and the DRBD secret, and

  # it's not needed for normal functioning, and randomize LVM names

  SanitizeDisks(opts, config_data)

  SanitizeSecrets(opts, config_data)

  if opts.sanitize_names:

    SanitizeCluster(opts, config_data)

    SanitizeNodes(opts, config_data)

    SanitizeInstances(opts, config_data)

  if opts.sanitize_ips:

    SanitizeIps(opts, config_data)

  if opts.sanitize_os_names:

    SanitizeOsNames(opts, config_data)

  data = serializer.DumpJson(config_data)

  if args[0] == "-":

    sys.stdout.write(data)

  else:

    utils.WriteFile(file_name=args[0],

                    data=data,

                    mode=0600,

                    backup=True)

if __name__ == "__main__":

  main()