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.

import sys

from optparse import make_option

from ganeti.cli import *

from ganeti import opcodes

from ganeti import logger

from ganeti import utils

from ganeti import constants

from ganeti import errors

def AddNode(opts, args):

  """Add node cli-to-processor bridge."""

  logger.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" % args[0])

  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.

  """

  if opts.output is None:

    selected_fields = ["name", "dtotal", "dfree",

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

                       "pinst_cnt", "sinst_cnt"]

  else:

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

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

  output = SubmitOpCode(op)

  if not opts.no_headers:

    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",

      }

  else:

    headers = None

  if opts.human_readable:

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

  else:

    unitfields = None

  numfields = ["dtotal", "dfree",

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

               "pinst_cnt", "sinst_cnt",

               "ctotal"]

  # change raw values to nicer strings

  for row in output:

    for idx, field in enumerate(selected_fields):

      val = row[idx]

      if field == "pinst_list":

        val = ",".join(val)

      elif field == "sinst_list":

        val = ",".join(val)

      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)

  for line in data:

    logger.ToStdout(line)

  return 0

def EvacuateNode(opts, args):

  """Relocate all secondary instance from a node.

  """

  force = opts.force

  selected_fields = ["name", "sinst_list"]

  src_node, dst_node = args

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

  result = SubmitOpCode(op)

  src_node, sinst = result[0]

  op = opcodes.OpQueryNodes(output_fields=["name"], names=[dst_node])

  result = SubmitOpCode(op)

  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)

  if not sinst:

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

    return constants.EXIT_SUCCESS

  sinst = utils.NiceSort(sinst)

  retcode = constants.EXIT_SUCCESS

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

                               " %s to node\n %s?" %

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

                               src_node, dst_node)):

    return constants.EXIT_CONFIRMATION

  good_cnt = bad_cnt = 0

  for iname in sinst:

    op = opcodes.OpReplaceDisks(instance_name=iname,

                                remote_node=dst_node,

                                mode=constants.REPLACE_DISK_ALL,

                                disks=["sda", "sdb"])

    try:

      logger.ToStdout("Replacing disks for instance %s" % iname)

      SubmitOpCode(op)

      logger.ToStdout("Instance %s has been relocated" % iname)

      good_cnt += 1

    except errors.GenericError, err:

      nret, msg = FormatError(err)

      retcode |= nret

      logger.ToStderr("Error replacing disks for instance %s: %s" %

                      (iname, msg))

      bad_cnt += 1

  if retcode == constants.EXIT_SUCCESS:

    logger.ToStdout("All %d instance(s) relocated successfully." % good_cnt)

  else:

    logger.ToStdout("There were errors during the relocation:\n"

                    "%d error(s) out of %d instance(s)." %

                    (bad_cnt, good_cnt + bad_cnt))

  return retcode

def FailoverNode(opts, args):

  """Failover all primary instance on a node.

  """

  force = opts.force

  selected_fields = ["name", "pinst_list"]

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

  result = SubmitOpCode(op)

  node, pinst = result[0]

  if not pinst:

    logger.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

  good_cnt = bad_cnt = 0

  for iname in pinst:

    op = opcodes.OpFailoverInstance(instance_name=iname,

                                    ignore_consistency=opts.ignore_consistency)

    try:

      logger.ToStdout("Failing over instance %s" % iname)

      SubmitOpCode(op)

      logger.ToStdout("Instance %s has been failed over" % iname)

      good_cnt += 1

    except errors.GenericError, err:

      nret, msg = FormatError(err)

      retcode |= nret

      logger.ToStderr("Error failing over instance %s: %s" % (iname, msg))

      bad_cnt += 1

  if retcode == 0:

    logger.ToStdout("All %d instance(s) failed over successfully." % good_cnt)

  else:

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

                    "%d error(s) out of %d instance(s)." %

                    (bad_cnt, good_cnt + bad_cnt))

  return retcode

def ShowNodeConfig(opts, args):

  """Show node information.

  """

  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:

    logger.ToStdout("Node name: %s" % name)

    logger.ToStdout("  primary ip: %s" % primary_ip)

    logger.ToStdout("  secondary ip: %s" % secondary_ip)

    if pinst:

      logger.ToStdout("  primary for instances:")

      for iname in pinst:

        logger.ToStdout("    - %s" % iname)

    else:

      logger.ToStdout("  primary for no instances")

    if sinst:

      logger.ToStdout("  secondary for instances:")

      for iname in sinst:

        logger.ToStdout("    - %s" % iname)

    else:

      logger.ToStdout("  secondary for no instances")

  return 0

def RemoveNode(opts, args):

  """Remove node cli-to-processor bridge."""

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

  SubmitOpCode(op)

def ListVolumes(opts, args):

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

  """

  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

  if opts.human_readable:

    unitfields = ["size"]

  else:

    unitfields = None

  numfields = ["size"]

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

                       fields=selected_fields, unitfields=unitfields,

                       numfields=numfields, data=output)

  for line in data:

    logger.ToStdout(line)

  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"),

           ],

          "[-s ip] <node_name>", "Add a node to the cluster"),

  'evacuate': (EvacuateNode, ARGS_FIXED(2),

               [DEBUG_OPT, FORCE_OPT],

               "[-f] <src_node> <dst_node>",

               "Relocate the secondary instances from the first node"

               " to the second one (only for instances of type remote_raid1"

               " drbd)"),

  '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 of type remote_raid1)"),

  '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],

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

           " are (see the man page for details): name, pinst_cnt, pinst_list,"

           " sinst_cnt, sinst_list, pip, sip, dtotal, dfree, mtotal, mnode,"

           " mfree, bootid, cpu_count. The default field list is"

           " (in order): name,"

           " dtotal, dfree, mtotal, mnode, mfree, pinst_cnt, sinst_cnt."),

  '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}))