#!/usr/bin/env ruby

# ---------------------------------------------------------------------------- #
# Copyright 2002-2019, OpenNebula Project, OpenNebula Systems                  #
#                                                                              #
# Licensed under the Apache License, Version 2.0 (the "License"); you may      #
# not use this file except in compliance with the License. You may obtain      #
# a copy of the License at                                                     #
#                                                                              #
# http://www.apache.org/licenses/LICENSE-2.0                                   #
#                                                                              #
# Unless required by applicable law or agreed to in writing, software          #
# distributed under the License is distributed on an "AS IS" BASIS,            #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.     #
# See the License for the specific language governing permissions and          #
# limitations under the License.                                               #
# ---------------------------------------------------------------------------- #

ONE_LOCATION ||= ENV['ONE_LOCATION']

if !ONE_LOCATION
    RUBY_LIB_LOCATION ||= '/usr/lib/one/ruby'
    GEMS_LOCATION     ||= '/usr/share/one/gems'
else
    RUBY_LIB_LOCATION ||= ONE_LOCATION + '/lib/ruby'
    GEMS_LOCATION     ||= ONE_LOCATION + '/share/gems'
end

Gem.use_paths(GEMS_LOCATION) if File.directory?(GEMS_LOCATION)

$LOAD_PATH << RUBY_LIB_LOCATION
$LOAD_PATH << File.dirname(__FILE__)

require 'vcenter_driver'

vm_id    = ARGV[-2]
src_host = ARGV[-3]
dst_host = ARGV[-4]

drv_action = OpenNebula::XMLElement.new
drv_action.initialize_xml(Base64.decode64(STDIN.read), 'VMM_DRIVER_ACTION_DATA')

dst_ds = drv_action['VM/HISTORY_RECORDS/HISTORY/DS_ID']
src_ds = drv_action['DATASTORE/ID']

begin
    new_ds = dst_ds != src_ds

    if new_ds
        VCenterDriver::VirtualMachine
            .migrate_routine(vm_id, src_host, dst_host, true, dst_ds)
    else
        VCenterDriver::VirtualMachine.migrate_routine(vm_id, src_host, dst_host)
    end
rescue StandardError => e
    message = "Cannot migrate for VM #{vm_id}. "\
              'Failed due to '\
              "\"#{e.message}\"."
    OpenNebula.log_error(message)

    if VCenterDriver::CONFIG[:debug_information]
        STDERR.puts "#{message} #{e.backtrace}"
    end

    exit(-1)
end
