Synnefo » snf-ganeti

#!/usr/bin/python

#

# Copyright (C) 2006, 2007, 2008 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=W0401,W0614

# W0401: Wildcard import ganeti.cli

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

import sys

from optparse import make_option

from ganeti.cli import *

from ganeti import cli

from ganeti import opcodes

from ganeti import utils

from ganeti import constants

from ganeti import errors

from ganeti import bootstrap

#: default list of field for L{ListNodes}

_LIST_DEF_FIELDS = [

  "name", "dtotal", "dfree",

  "mtotal", "mnode", "mfree",

  "pinst_cnt", "sinst_cnt",

  ]

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

_LIST_HEADERS = {

  "name": "Node", "pinst_cnt": "Pinst", "sinst_cnt": "Sinst",

  "pinst_list": "PriInstances", "sinst_list": "SecInstances",

  "pip": "PrimaryIP", "sip": "SecondaryIP",

  "dtotal": "DTotal", "dfree": "DFree",

  "mtotal": "MTotal", "mnode": "MNode", "mfree": "MFree",

  "bootid": "BootID",

  "ctotal": "CTotal",

  "tags": "Tags",

  "serial_no": "SerialNo",

  "master_candidate": "MasterC",

  "master": "IsMaster",

  "offline": "Offline",

  }

@UsesRPC

def AddNode(opts, args):

  """Add a node to the cluster.

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

  @type args: list

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

  @rtype: int

  @return: the desired exit code

  """

  cl = GetClient()

  dns_data = utils.HostInfo(args[0])

  node = dns_data.name

  if not opts.readd:

    try:

      output = cl.QueryNodes(names=[node], fields=['name'])

    except (errors.OpPrereqError, errors.OpExecError):

      pass

    else:

      ToStderr("Node %s already in the cluster (as %s)"

               " - please use --readd", args[0], output[0][0])

      return 1

  # read the cluster name from the master

  output = cl.QueryConfigValues(['cluster_name'])

  cluster_name = output[0]

  ToStderr("-- WARNING -- \n"

           "Performing this operation is going to replace the ssh daemon"

           " keypair\n"

           "on the target machine (%s) with the ones of the"

           " current one\n"

           "and grant full intra-cluster ssh root access to/from it\n", node)

  bootstrap.SetupNodeDaemon(cluster_name, node, opts.ssh_key_check)

  op = opcodes.OpAddNode(node_name=args[0], secondary_ip=opts.secondary_ip,

                         readd=opts.readd)

  SubmitOpCode(op)

def ListNodes(opts, args):

  """List nodes and their properties.

  @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

  """

  if opts.output is None:

    selected_fields = _LIST_DEF_FIELDS

  elif opts.output.startswith("+"):

    selected_fields = _LIST_DEF_FIELDS + opts.output[1:].split(",")

  else:

    selected_fields = opts.output.split(",")

  output = GetClient().QueryNodes([], selected_fields)

  if not opts.no_headers:

    headers = _LIST_HEADERS

  else:

    headers = None

  unitfields = ["dtotal", "dfree", "mtotal", "mnode", "mfree"]

  numfields = ["dtotal", "dfree",

               "mtotal", "mnode", "mfree",

               "pinst_cnt", "sinst_cnt",

               "ctotal", "serial_no"]

  list_type_fields = ("pinst_list", "sinst_list", "tags")

  # change raw values to nicer strings

  for row in output:

    for idx, field in enumerate(selected_fields):

      val = row[idx]

      if field in list_type_fields:

        val = ",".join(val)

      elif field in ('master', 'master_candidate', 'offline'):

        if val:

          val = 'Y'

        else:

          val = 'N'

      elif val is None:

        val = "?"

      row[idx] = str(val)

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

                       fields=selected_fields, unitfields=unitfields,

                       numfields=numfields, data=output, units=opts.units)

  for line in data:

    ToStdout(line)

  return 0

def EvacuateNode(opts, args):

  """Relocate all secondary instance from a node.

  @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

  """

  cl = GetClient()

  force = opts.force

  dst_node = opts.dst_node

  iallocator = opts.iallocator

  cnt = [dst_node, iallocator].count(None)

  if cnt != 1:

    raise errors.OpPrereqError("One and only one of the -n and -i"

                               " options must be passed")

  selected_fields = ["name", "sinst_list"]

  src_node = args[0]

  op = opcodes.OpQueryNodes(output_fields=selected_fields, names=[src_node])

  result = cl.QueryNodes(names=[src_node], fields=selected_fields)

  src_node, sinst = result[0]

  if not sinst:

    ToStderr("No secondary instances on node %s, exiting.", src_node)

    return constants.EXIT_SUCCESS

  if dst_node is not None:

    result = cl.QueryNodes(names=[dst_node], fields=["name"])

    dst_node = result[0][0]

    if src_node == dst_node:

      raise errors.OpPrereqError("Evacuate node needs different source and"

                                 " target nodes (node %s given twice)" %

                                 src_node)

    txt_msg = "to node %s" % dst_node

  else:

    txt_msg = "using iallocator %s" % iallocator

  sinst = utils.NiceSort(sinst)

  if not force and not AskUser("Relocate instance(s) %s from node\n"

                               " %s %s?" %

                               (",".join("'%s'" % name for name in sinst),

                               src_node, txt_msg)):

    return constants.EXIT_CONFIRMATION

  ops = []

  for iname in sinst:

    op = opcodes.OpReplaceDisks(instance_name=iname,

                                remote_node=dst_node,

                                mode=constants.REPLACE_DISK_CHG,

                                iallocator=iallocator,

                                disks=[])

    ops.append(op)

  job_id = cli.SendJob(ops, cl=cl)

  cli.PollJob(job_id, cl=cl)

def FailoverNode(opts, args):

  """Failover all primary instance on a node.

  @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

  """

  cl = GetClient()

  force = opts.force

  selected_fields = ["name", "pinst_list"]

  op = opcodes.OpQueryNodes(output_fields=selected_fields, names=args)

  result = SubmitOpCode(op, cl=cl)

  node, pinst = result[0]

  if not pinst:

    ToStderr("No primary instances on node %s, exiting.", node)

    return 0

  pinst = utils.NiceSort(pinst)

  retcode = 0

  if not force and not AskUser("Fail over instance(s) %s?" %

                               (",".join("'%s'" % name for name in pinst))):

    return 2

  jex = JobExecutor(cl=cl)

  for iname in pinst:

    op = opcodes.OpFailoverInstance(instance_name=iname,

                                    ignore_consistency=opts.ignore_consistency)

    jex.QueueJob(iname, op)

  results = jex.GetResults()

  bad_cnt = len([row for row in results if not row[0]])

  if bad_cnt == 0:

    ToStdout("All %d instance(s) failed over successfully.", len(results))

  else:

    ToStdout("There were errors during the failover:\n"

             "%d error(s) out of %d instance(s).", bad_cnt, len(results))

  return retcode

def MigrateNode(opts, args):

  """Migrate all primary instance on a node.

  """

  cl = GetClient()

  force = opts.force

  selected_fields = ["name", "pinst_list"]

  result = cl.QueryNodes(names=args, fields=selected_fields)

  node, pinst = result[0]

  if not pinst:

    ToStdout("No primary instances on node %s, exiting." % node)

    return 0

  pinst = utils.NiceSort(pinst)

  retcode = 0

  if not force and not AskUser("Migrate instance(s) %s?" %

                               (",".join("'%s'" % name for name in pinst))):

    return 2

  jex = JobExecutor(cl=cl)

  for iname in pinst:

    op = opcodes.OpMigrateInstance(instance_name=iname, live=opts.live,

                                   cleanup=False)

    jex.QueueJob(iname, op)

  results = jex.GetResults()

  bad_cnt = len([row for row in results if not row[0]])

  if bad_cnt == 0:

    ToStdout("All %d instance(s) migrated successfully.", len(results))

  else:

    ToStdout("There were errors during the migration:\n"

             "%d error(s) out of %d instance(s).", bad_cnt, len(results))

  return retcode

def ShowNodeConfig(opts, args):

  """Show node information.

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

  @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 nodes to be queried for information

  @rtype: int

  @return: the desired exit code

  """

  op = opcodes.OpQueryNodes(output_fields=["name", "pip", "sip",

                                           "pinst_list", "sinst_list"],

                            names=args)

  result = SubmitOpCode(op)

  for name, primary_ip, secondary_ip, pinst, sinst in result:

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

    ToStdout("  primary ip: %s", primary_ip)

    ToStdout("  secondary ip: %s", secondary_ip)

    if pinst:

      ToStdout("  primary for instances:")

      for iname in pinst:

        ToStdout("    - %s", iname)

    else:

      ToStdout("  primary for no instances")

    if sinst:

      ToStdout("  secondary for instances:")

      for iname in sinst:

        ToStdout("    - %s", iname)

    else:

      ToStdout("  secondary for no instances")

  return 0

def RemoveNode(opts, args):

  """Remove a node from the cluster.

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

  @type args: list

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

      the node to be removed

  @rtype: int

  @return: the desired exit code

  """

  op = opcodes.OpRemoveNode(node_name=args[0])

  SubmitOpCode(op)

  return 0

def ListVolumes(opts, args):

  """List logical volumes on node(s).

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

  @type args: list

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

      we list data for all nodes, or contain a list of nodes

      to display data only for those

  @rtype: int

  @return: the desired exit code

  """

  if opts.output is None:

    selected_fields = ["node", "phys", "vg",

                       "name", "size", "instance"]

  else:

    selected_fields = opts.output.split(",")

  op = opcodes.OpQueryNodeVolumes(nodes=args, output_fields=selected_fields)

  output = SubmitOpCode(op)

  if not opts.no_headers:

    headers = {"node": "Node", "phys": "PhysDev",

               "vg": "VG", "name": "Name",

               "size": "Size", "instance": "Instance"}

  else:

    headers = None

  unitfields = ["size"]

  numfields = ["size"]

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

                       fields=selected_fields, unitfields=unitfields,

                       numfields=numfields, data=output, units=opts.units)

  for line in data:

    ToStdout(line)

  return 0

def SetNodeParams(opts, args):

  """Modifies a node.

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

  @type args: list

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

  @rtype: int

  @return: the desired exit code

  """

  if opts.master_candidate is None and opts.offline is None:

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

    return 1

  if opts.master_candidate is not None:

    candidate = opts.master_candidate == 'yes'

  else:

    candidate = None

  if opts.offline is not None:

    offline = opts.offline == 'yes'

  else:

    offline = None

  op = opcodes.OpSetNodeParams(node_name=args[0],

                               master_candidate=candidate,

                               offline=offline,

                               force=opts.force)

  # even if here we process the result, we allow submit only

  result = SubmitOrSend(op, opts)

  if result:

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

    for param, data in result:

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

  return 0

commands = {

  'add': (AddNode, ARGS_ONE,

          [DEBUG_OPT,

           make_option("-s", "--secondary-ip", dest="secondary_ip",

                       help="Specify the secondary ip for the node",

                       metavar="ADDRESS", default=None),

           make_option("--readd", dest="readd",

                       default=False, action="store_true",

                       help="Readd old node after replacing it"),

           make_option("--no-ssh-key-check", dest="ssh_key_check",

                       default=True, action="store_false",

                       help="Disable SSH key fingerprint checking"),

           ],

          "[-s ip] [--readd] [--no-ssh-key-check] <node_name>",

          "Add a node to the cluster"),

  'evacuate': (EvacuateNode, ARGS_ONE,

               [DEBUG_OPT, FORCE_OPT,

                make_option("-n", "--new-secondary", dest="dst_node",

                            help="New secondary node", metavar="NODE",

                            default=None),

                make_option("-i", "--iallocator", metavar="<NAME>",

                            help="Select new secondary for the instance"

                            " automatically using the"

                            " <NAME> iallocator plugin",

                            default=None, type="string"),

                ],

               "[-f] {-i <iallocator> | -n <dst>} <node>",

               "Relocate the secondary instances from a node"

               " to other nodes (only for instances with drbd disk template)"),

  'failover': (FailoverNode, ARGS_ONE,

               [DEBUG_OPT, FORCE_OPT,

                make_option("--ignore-consistency", dest="ignore_consistency",

                            action="store_true", default=False,

                            help="Ignore the consistency of the disks on"

                            " the secondary"),

                ],

               "[-f] <node>",

               "Stops the primary instances on a node and start them on their"

               " secondary node (only for instances with drbd disk template)"),

  'migrate': (MigrateNode, ARGS_ONE,

               [DEBUG_OPT, FORCE_OPT,

                make_option("--non-live", dest="live",

                            default=True, action="store_false",

                            help="Do a non-live migration (this usually means"

                            " freeze the instance, save the state,"

                            " transfer and only then resume running on the"

                            " secondary node)"),

                ],

               "[-f] <node>",

               "Migrate all the primary instance on a node away from it"

               " (only for instances of type drbd)"),

  'info': (ShowNodeConfig, ARGS_ANY, [DEBUG_OPT],

           "[<node_name>...]", "Show information about the node(s)"),

  'list': (ListNodes, ARGS_NONE,

           [DEBUG_OPT, NOHDR_OPT, SEP_OPT, USEUNITS_OPT, FIELDS_OPT,

            SUBMIT_OPT],

           "", "Lists the nodes in the cluster. The available fields"

           " are (see the man page for details): %s"

           " The default field list is (in order): %s." %

           (", ".join(_LIST_HEADERS), ", ".join(_LIST_DEF_FIELDS))),

  'modify': (SetNodeParams, ARGS_ONE,

             [DEBUG_OPT, FORCE_OPT,

              SUBMIT_OPT,

              make_option("-C", "--master-candidate", dest="master_candidate",

                          choices=('yes', 'no'), default=None,

                          help="Set the master_candidate flag on the node"),

              make_option("-O", "--offline", dest="offline",

                          choices=('yes', 'no'), default=None,

                          help="Set the offline flag on the node"),

              ],

             "<instance>", "Alters the parameters of an instance"),

  'remove': (RemoveNode, ARGS_ONE, [DEBUG_OPT],

             "<node_name>", "Removes a node from the cluster"),

  'volumes': (ListVolumes, ARGS_ANY,

              [DEBUG_OPT, NOHDR_OPT, SEP_OPT, USEUNITS_OPT, FIELDS_OPT],

              "[<node_name>...]", "List logical volumes on node(s)"),

  'list-tags': (ListTags, ARGS_ONE, [DEBUG_OPT],

                "<node_name>", "List the tags of the given node"),

  'add-tags': (AddTags, ARGS_ATLEAST(1), [DEBUG_OPT, TAG_SRC_OPT],

               "<node_name> tag...", "Add tags to the given node"),

  'remove-tags': (RemoveTags, ARGS_ATLEAST(1), [DEBUG_OPT, TAG_SRC_OPT],

                  "<node_name> tag...", "Remove tags from the given node"),

  }

if __name__ == '__main__':

  sys.exit(GenericMain(commands, override={"tag_type": constants.TAG_NODE}))