Synnefo » snf-ganeti

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# Copyright (C) 2011, 2012, 2013 Google Inc.

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# This program is free software; you can redistribute it and/or modify

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# General Public License for more details.

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# 02110-1301, USA.

"""IP pool related commands"""

# pylint: disable=W0401,W0614

# W0401: Wildcard import ganeti.cli

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

import textwrap

import itertools

from ganeti.cli import *

from ganeti import constants

from ganeti import opcodes

from ganeti import utils

from ganeti import errors

#: default list of fields for L{ListNetworks}

_LIST_DEF_FIELDS = ["name", "network", "gateway",

                    "mac_prefix", "group_list", "tags"]

def _HandleReservedIPs(ips):

  if ips is None:

    return None

  elif not ips:

    return []

  else:

    return utils.UnescapeAndSplit(ips, sep=",")

def AddNetwork(opts, args):

  """Add a network 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 network name to create

  @rtype: int

  @return: the desired exit code

  """

  (network_name, ) = args

  if opts.network is None:

    raise errors.OpPrereqError("The --network option must be given",

                               errors.ECODE_INVAL)

  if opts.tags is not None:

    tags = opts.tags.split(",")

  else:

    tags = []

  reserved_ips = _HandleReservedIPs(opts.add_reserved_ips)

  op = opcodes.OpNetworkAdd(network_name=network_name,

                            gateway=opts.gateway,

                            network=opts.network,

                            gateway6=opts.gateway6,

                            network6=opts.network6,

                            mac_prefix=opts.mac_prefix,

                            add_reserved_ips=reserved_ips,

                            conflicts_check=opts.conflicts_check,

                            tags=tags)

  SubmitOrSend(op, opts)

def _GetDefaultGroups(cl, groups):

  """Gets list of groups to operate on.

  If C{groups} doesn't contain groups, a list of all groups in the cluster is

  returned.

  @type cl: L{luxi.Client}

  @type groups: list

  @rtype: list

  """

  if groups:

    return groups

  return list(itertools.chain(*cl.QueryGroups([], ["uuid"], False)))

def ConnectNetwork(opts, args):

  """Map a network to a node group.

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

  @type args: list

  @param args: Network, mode, physlink and node groups

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  (network, mode, link) = args[:3]

  groups = _GetDefaultGroups(cl, args[3:])

  # TODO: Change logic to support "--submit"

  for group in groups:

    op = opcodes.OpNetworkConnect(group_name=group,

                                  network_name=network,

                                  network_mode=mode,

                                  network_link=link,

                                  conflicts_check=opts.conflicts_check)

    SubmitOpCode(op, opts=opts, cl=cl)

def DisconnectNetwork(opts, args):

  """Unmap a network from a node group.

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

  @type args: list

  @param args: Network and node groups

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  (network, ) = args[:1]

  groups = _GetDefaultGroups(cl, args[1:])

  # TODO: Change logic to support "--submit"

  for group in groups:

    op = opcodes.OpNetworkDisconnect(group_name=group,

                                     network_name=network)

    SubmitOpCode(op, opts=opts, cl=cl)

def ListNetworks(opts, args):

  """List Ip pools and their properties.

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

  @type args: list

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

  @rtype: int

  @return: the desired exit code

  """

  desired_fields = ParseFields(opts.output, _LIST_DEF_FIELDS)

  fmtoverride = {

    "group_list":

      (lambda data: utils.CommaJoin("%s (%s, %s)" % (name, mode, link)

                                    for (name, mode, link) in data),

       False),

    "inst_list": (",".join, False),

    "tags": (",".join, False),

    }

  cl = GetClient(query=True)

  return GenericList(constants.QR_NETWORK, desired_fields, args, None,

                     opts.separator, not opts.no_headers,

                     verbose=opts.verbose, format_override=fmtoverride,

                     cl=cl)

def ListNetworkFields(opts, args):

  """List network fields.

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

  @type args: list

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

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient(query=True)

  return GenericListFields(constants.QR_NETWORK, args, opts.separator,

                           not opts.no_headers, cl=cl)

def ShowNetworkConfig(_, args):

  """Show network information.

  @type args: list

  @param args: should either be an empty list, in which case

      we show information about all nodes, or should contain

      a list of networks (names or UUIDs) to be queried for information

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  result = cl.QueryNetworks(fields=["name", "network", "gateway",

                                    "network6", "gateway6",

                                    "mac_prefix",

                                    "free_count", "reserved_count",

                                    "map", "group_list", "inst_list",

                                    "external_reservations",

                                    "serial_no", "uuid"],

                            names=args, use_locking=False)

  for (name, network, gateway, network6, gateway6,

       mac_prefix, free_count, reserved_count,

       mapping, group_list, instances, ext_res, serial, uuid) in result:

    size = free_count + reserved_count

    ToStdout("Network name: %s", name)

    ToStdout("UUID: %s", uuid)

    ToStdout("Serial number: %d", serial)

    ToStdout("  Subnet: %s", network)

    ToStdout("  Gateway: %s", gateway)

    ToStdout("  IPv6 Subnet: %s", network6)

    ToStdout("  IPv6 Gateway: %s", gateway6)

    ToStdout("  Mac Prefix: %s", mac_prefix)

    ToStdout("  Size: %d", size)

    ToStdout("  Free: %d (%.2f%%)", free_count,

             100 * float(free_count) / float(size))

    ToStdout("  Usage map:")

    idx = 0

    for line in textwrap.wrap(mapping, width=64):

      ToStdout("     %s %s %d", str(idx).rjust(3), line.ljust(64), idx + 63)

      idx += 64

    ToStdout("         (X) used    (.) free")

    if ext_res:

      ToStdout("  externally reserved IPs:")

      for line in textwrap.wrap(ext_res, width=64):

        ToStdout("    %s" % line)

    if group_list:

      ToStdout("  connected to node groups:")

      for group, nic_mode, nic_link in group_list:

        ToStdout("    %s (%s on %s)", group, nic_mode, nic_link)

    else:

      ToStdout("  not connected to any node group")

    if instances:

      idata = cl.QueryInstances([], ["uuid", "name"], False)

      uuid2name = dict(idata)

      ToStdout("  used by %d instances:", len(instances))

      for inst in instances:

        name = uuid2name[inst]

        ((ips, networks), ) = cl.QueryInstances([name],

                                                ["nic.ips", "nic.networks"],

                                                use_locking=False)

        l = lambda value: ", ".join(str(idx) + ":" + str(ip)

                                    for idx, (ip, net) in enumerate(value)

                                      if net == uuid)

        ToStdout("    %s: %s", name, l(zip(ips, networks)))

    else:

      ToStdout("  not used by any instances")

def SetNetworkParams(opts, args):

  """Modifies an IP address pool's parameters.

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

  @type args: list

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

  @rtype: int

  @return: the desired exit code

  """

  # TODO: add "network": opts.network,

  all_changes = {

    "gateway": opts.gateway,

    "add_reserved_ips": _HandleReservedIPs(opts.add_reserved_ips),

    "remove_reserved_ips": _HandleReservedIPs(opts.remove_reserved_ips),

    "mac_prefix": opts.mac_prefix,

    "gateway6": opts.gateway6,

    "network6": opts.network6,

  }

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

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

    return 1

  # pylint: disable=W0142

  op = opcodes.OpNetworkSetParams(network_name=args[0], **all_changes)

  # TODO: add feedback to user, e.g. list the modifications

  SubmitOrSend(op, opts)

def RemoveNetwork(opts, args):

  """Remove an IP address pool 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 id of the IP address pool to remove

  @rtype: int

  @return: the desired exit code

  """

  (network_name,) = args

  op = opcodes.OpNetworkRemove(network_name=network_name, force=opts.force)

  SubmitOrSend(op, opts)

commands = {

  "add": (

    AddNetwork, ARGS_ONE_NETWORK,

    [DRY_RUN_OPT, NETWORK_OPT, GATEWAY_OPT, ADD_RESERVED_IPS_OPT,

     MAC_PREFIX_OPT, NETWORK6_OPT, GATEWAY6_OPT,

     NOCONFLICTSCHECK_OPT, TAG_ADD_OPT, PRIORITY_OPT] + SUBMIT_OPTS,

    "<network_name>", "Add a new IP network to the cluster"),

  "list": (

    ListNetworks, ARGS_MANY_NETWORKS,

    [NOHDR_OPT, SEP_OPT, FIELDS_OPT, VERBOSE_OPT],

    "[<network_id>...]",

    "Lists the IP networks in the cluster. The available fields can be shown"

    " using the \"list-fields\" command (see the man page for details)."

    " The default list is (in order): %s." % utils.CommaJoin(_LIST_DEF_FIELDS)),

  "list-fields": (

    ListNetworkFields, [ArgUnknown()], [NOHDR_OPT, SEP_OPT], "[fields...]",

    "Lists all available fields for networks"),

  "info": (

    ShowNetworkConfig, ARGS_MANY_NETWORKS, [],

    "[<network_name>...]", "Show information about the network(s)"),

  "modify": (

    SetNetworkParams, ARGS_ONE_NETWORK,

    [DRY_RUN_OPT] + SUBMIT_OPTS +

    [ADD_RESERVED_IPS_OPT,

     REMOVE_RESERVED_IPS_OPT, GATEWAY_OPT, MAC_PREFIX_OPT, NETWORK6_OPT,

     GATEWAY6_OPT, PRIORITY_OPT],

    "<network_name>", "Alters the parameters of a network"),

  "connect": (

    ConnectNetwork,

    [ArgNetwork(min=1, max=1),

     ArgChoice(min=1, max=1, choices=constants.NIC_VALID_MODES),

     ArgUnknown(min=1, max=1),

     ArgGroup()],

    [NOCONFLICTSCHECK_OPT, PRIORITY_OPT],

    "<network_name> <mode> <link> [<node_group>...]",

    "Map a given network to the specified node group"

    " with given mode and link (netparams)"),

  "disconnect": (

    DisconnectNetwork,

    [ArgNetwork(min=1, max=1), ArgGroup()],

    [PRIORITY_OPT],

    "<network_name> [<node_group>...]",

    "Unmap a given network from a specified node group"),

  "remove": (

    RemoveNetwork, ARGS_ONE_NETWORK,

    [FORCE_OPT, DRY_RUN_OPT] + SUBMIT_OPTS + [PRIORITY_OPT],

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

    "Remove an (empty) network from the cluster"),

  "list-tags": (

    ListTags, ARGS_ONE_NETWORK, [],

    "<network_name>", "List the tags of the given network"),

  "add-tags": (

    AddTags, [ArgNetwork(min=1, max=1), ArgUnknown()],

    [TAG_SRC_OPT, PRIORITY_OPT] + SUBMIT_OPTS,

    "<network_name> tag...", "Add tags to the given network"),

  "remove-tags": (

    RemoveTags, [ArgNetwork(min=1, max=1), ArgUnknown()],

    [TAG_SRC_OPT, PRIORITY_OPT] + SUBMIT_OPTS,

    "<network_name> tag...", "Remove tags from given network"),

}

def Main():

  return GenericMain(commands, override={"tag_type": constants.TAG_NETWORK})