gnt-node

#!/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 utils


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)
  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"}
  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"]

  # 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 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),],
          "<node_name>", "Add a node to the cluster"),
  '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"),
  '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)"),
  }


if __name__ == '__main__':
  sys.exit(GenericMain(commands))