Synnefo » snf-ganeti

#!/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

import pprint

from ganeti.cli import *

from ganeti import opcodes

def InitCluster(opts, args):

  """Initialize the cluster.

  Args:

    opts - class with options as members

    args - list of arguments, expected to be [clustername]

  """

  op = opcodes.OpInitCluster(cluster_name=args[0],

                             secondary_ip=opts.secondary_ip,

                             hypervisor_type=opts.hypervisor_type,

                             vg_name=opts.vg_name,

                             mac_prefix=opts.mac_prefix,

                             def_bridge=opts.def_bridge,

                             master_netdev=opts.master_netdev)

  SubmitOpCode(op)

  return 0

def DestroyCluster(opts, args):

  """Destroy the cluster.

  Args:

    opts - class with options as members

  """

  if not opts.yes_do_it:

    print ("Destroying a cluster is irreversibly. If you really want destroy"

           " this cluster, supply the --yes-do-it option.")

    return 1

  op = opcodes.OpDestroyCluster()

  SubmitOpCode(op)

  return 0

def ShowClusterVersion(opts, args):

  """Write version of ganeti software to the standard output.

  Args:

    opts - class with options as members

  """

  op = opcodes.OpQueryClusterInfo()

  result = SubmitOpCode(op)

  print ("Software version: %s" % result["software_version"])

  print ("Internode protocol: %s" % result["protocol_version"])

  print ("Configuration format: %s" % result["config_version"])

  print ("OS api version: %s" % result["os_api_version"])

  print ("Export interface: %s" % result["export_version"])

  return 0

def ShowClusterMaster(opts, args):

  """Write name of master node to the standard output.

  Args:

    opts - class with options as members

  """

  op = opcodes.OpQueryClusterInfo()

  result = SubmitOpCode(op)

  print (result["master"])

  return 0

def ShowClusterConfig(opts, args):

  """Shows cluster information.

  """

  op = opcodes.OpQueryClusterInfo()

  result = SubmitOpCode(op)

  print ("Cluster name: %s" % result["name"])

  print ("Architecture: %s (%s)" %

            (result["architecture"][0], result["architecture"][1]))

  print ("Master node: %s" % result["master"])

  print ("Instances:")

  for name, node in result["instances"]:

    print ("  - %s (on %s)" % (name, node))

  print ("Nodes:")

  for name in result["nodes"]:

    print ("  - %s" % name)

  return 0

def ClusterCopyFile(opts, args):

  """Copy a file from master to some nodes.

  Args:

    opts - class with options as members

    args - list containing a single element, the file name

  Opts used:

    nodes - list containing the name of target nodes; if empty, all nodes

  """

  op = opcodes.OpClusterCopyFile(filename=args[0], nodes=opts.nodes)

  SubmitOpCode(op)

  return 0

def RunClusterCommand(opts, args):

  """Run a command on some nodes.

  Args:

    opts - class with options as members

    args - the command list as a list

  Opts used:

    nodes: list containing the name of target nodes; if empty, all nodes

  """

  command = " ".join(args)

  nodes = opts.nodes

  op = opcodes.OpRunClusterCommand(command=command, nodes=nodes)

  result = SubmitOpCode(op)

  for node, sshcommand, output, exit_code in result:

    print ("------------------------------------------------")

    print ("node: %s" % node)

    print ("command: %s" % sshcommand)

    print ("%s" % output)

    print ("return code = %s" % exit_code)

def VerifyCluster(opts, args):

  """Verify integrity of cluster, performing various test on nodes.

  Args:

    opts - class with options as members

  """

  op = opcodes.OpVerifyCluster()

  result = SubmitOpCode(op)

  return result

def MasterFailover(opts, args):

  """Failover the master node.

  This command, when run on a non-master node, will cause the current

  master to cease being master, and the non-master to become new

  master.

  """

  op = opcodes.OpMasterFailover()

  SubmitOpCode(op)

# this is an option common to more than one command, so we declare

# it here and reuse it

node_option = make_option("-n", "--node", action="append", dest="nodes",

                          help="Node to copy to (if not given, all nodes)"

                          ", can be given multiple times", metavar="<node>",

                          default=[])

commands = {

  'init': (InitCluster, ARGS_ONE,

           [DEBUG_OPT,

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

                        help="Specify the secondary ip for this node;"

                        " if given, the entire cluster must have secondary"

                        " addresses",

                        metavar="ADDRESS", default=None),

            make_option("-t", "--hypervisor-type", dest="hypervisor_type",

                        help="Specify the hypervisor type (xen-3.0, fake)",

                        metavar="TYPE", choices=["xen-3.0", "fake"],

                        default="xen-3.0",),

            make_option("-m", "--mac-prefix", dest="mac_prefix",

                        help="Specify the mac prefix for the instance IP"

                        " addresses, in the format XX:XX:XX",

                        metavar="PREFIX",

                        default="aa:00:00",),

            make_option("-g", "--vg-name", dest="vg_name",

                        help="Specify the volume group name "

                        " (cluster-wide) for disk allocation [xenvg]",

                        metavar="VG",

                        default="xenvg",),

            make_option("-b", "--bridge", dest="def_bridge",

                        help="Specify the default bridge name (cluster-wide)"

                        " to connect the instances to [xen-br0]",

                        metavar="BRIDGE",

                        default="xen-br0",),

            make_option("--master-netdev", dest="master_netdev",

                        help="Specify the node interface (cluster-wide)"

                        " on which the master IP address will be added "

                        " [xen-br0]",

                        metavar="NETDEV",

                        default="xen-br0",),

            ],

           "[opts...] <cluster_name>",

           "Initialises a new cluster configuration"),

  'destroy': (DestroyCluster, ARGS_NONE,

              [DEBUG_OPT,

               make_option("--yes-do-it", dest="yes_do_it",

                           help="Destroy cluster",

                           action="store_true"),

              ],

              "", "Destroy cluster"),

  'verify': (VerifyCluster, ARGS_NONE, [DEBUG_OPT],

             "", "Does a check on the cluster configuration"),

  'masterfailover': (MasterFailover, ARGS_NONE, [DEBUG_OPT],

                     "", "Makes the current node the master"),

  'version': (ShowClusterVersion, ARGS_NONE, [DEBUG_OPT],

              "", "Shows the cluster version"),

  'getmaster': (ShowClusterMaster, ARGS_NONE, [DEBUG_OPT],

                "", "Shows the cluster master"),

  'copyfile': (ClusterCopyFile, ARGS_ONE, [DEBUG_OPT, node_option],

               "[-n node...] <filename>",

               "Copies a file to all (or only some) nodes"),

  'command': (RunClusterCommand, ARGS_ATLEAST(1), [DEBUG_OPT, node_option],

              "[-n node...] <command>",

              "Runs a command on all (or only some) nodes"),

  'info': (ShowClusterConfig, ARGS_NONE, [DEBUG_OPT],

                 "", "Show cluster configuration"),

  }

if __name__ == '__main__':

  retcode = GenericMain(commands)

  sys.exit(retcode)