85 lines
2.9 KiB
Python
Executable File
85 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python
|
|
|
|
# Copyright 2010 OpenStack Foundation
|
|
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
|
|
# NOTE: XenServer still only supports Python 2.4 in it's dom0 userspace
|
|
# which means the Nova xenapi plugins must use only Python 2.4 features
|
|
|
|
"""
|
|
XenAPI Plugin for transferring data between host nodes
|
|
"""
|
|
import utils
|
|
|
|
import pluginlib_nova
|
|
|
|
|
|
pluginlib_nova.configure_logging('migration')
|
|
logging = pluginlib_nova.logging
|
|
|
|
|
|
def move_vhds_into_sr(session, instance_uuid, sr_path, uuid_stack):
|
|
"""Moves the VHDs from their copied location to the SR."""
|
|
staging_path = "/images/instance%s" % instance_uuid
|
|
imported_vhds = utils.import_vhds(sr_path, staging_path, uuid_stack)
|
|
utils.cleanup_staging_area(staging_path)
|
|
return imported_vhds
|
|
|
|
|
|
def _rsync_vhds(instance_uuid, host, staging_path, user="root"):
|
|
if not staging_path.endswith('/'):
|
|
staging_path += '/'
|
|
|
|
dest_path = '/images/instance%s/' % (instance_uuid)
|
|
|
|
ip_cmd = ["/sbin/ip", "addr", "show"]
|
|
output = utils.run_command(ip_cmd)
|
|
if ' %s/' % host in output:
|
|
# If copying to localhost, don't use SSH
|
|
rsync_cmd = ["/usr/bin/rsync", "-av", "--progress",
|
|
staging_path, dest_path]
|
|
else:
|
|
ssh_cmd = 'ssh -o StrictHostKeyChecking=no'
|
|
rsync_cmd = ["/usr/bin/rsync", "-av", "--progress", "-e", ssh_cmd,
|
|
staging_path, '%s@%s:%s' % (user, host, dest_path)]
|
|
|
|
# NOTE(hillad): rsync's progress is carriage returned, requiring
|
|
# universal_newlines for real-time output.
|
|
|
|
rsync_proc = utils.make_subprocess(rsync_cmd, stdout=True, stderr=True,
|
|
universal_newlines=True)
|
|
while True:
|
|
rsync_progress = rsync_proc.stdout.readline()
|
|
if not rsync_progress:
|
|
break
|
|
logging.debug("[%s] %s" % (instance_uuid, rsync_progress))
|
|
|
|
utils.finish_subprocess(rsync_proc, rsync_cmd)
|
|
|
|
|
|
def transfer_vhd(session, instance_uuid, host, vdi_uuid, sr_path, seq_num):
|
|
"""Rsyncs a VHD to an adjacent host."""
|
|
staging_path = utils.make_staging_area(sr_path)
|
|
try:
|
|
utils.prepare_staging_area(
|
|
sr_path, staging_path, [vdi_uuid], seq_num=seq_num)
|
|
_rsync_vhds(instance_uuid, host, staging_path)
|
|
finally:
|
|
utils.cleanup_staging_area(staging_path)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
utils.register_plugin_calls(move_vhds_into_sr, transfer_vhd)
|