Synnefo » snf-ganeti » ganeti-local

def MigrateInstance(opts, args):

  """Migrate an instance.

  The migrate is done without shutdown.

  Args:

    opts - class with options as members

    args - list with a single element, the instance name

  Opts used:

    force - whether to migrate without asking questions.

  """

  instance_name = args[0]

  force = opts.force

  if not force:

    if opts.cleanup:

      usertext = ("Instance %s will be recovered from a failed migration."

                  " Note that the migration procedure (including cleanup)" %

                  (instance_name,))

    else:

      usertext = ("Instance %s will be migrated. Note that migration" %

                  (instance_name,))

    usertext += (" is **experimental** in this version."

                " This might impact the instance if anything goes wrong."

                " Continue?")

    if not AskUser(usertext):

      return 1

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

                                 cleanup=opts.cleanup)

  SubmitOpCode(op)

  return 0

  'migrate': (MigrateInstance, 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)"),

                make_option("--cleanup", dest="cleanup",

                            default=False, action="store_true",

                            help="Instead of performing the migration, try to"

                            " recover from a failed cleanup. This is safe"

                            " to run even if the instance is healthy, but it"

                            " will create extra replication traffic and "

                            " disrupt briefly the replication (like during the"

                            " migration"),

                ],

               "[-f] <instance>",

               "Migrate instance to its secondary node"

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