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# Copyright 2013 Rackspace Hosting
# 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.
from novaclient import base
from novaclient import utils
class EvacuateHostResponse(base.Resource):
pass
def _server_evacuate(cs, server, args):
success = True
error_message = ""
try:
cs.servers.evacuate(server['uuid'], args.target_host,
args.on_shared_storage)
except Exception as e:
success = False
error_message = "Error while evacuating instance: %s" % e
return EvacuateHostResponse(base.Manager,
{"server_uuid": server['uuid'],
"evacuate_accepted": success,
"error_message": error_message})
@utils.arg('host', metavar='<host>', help='Name of host.')
@utils.arg('--target_host',
metavar='<target_host>',
default=None,
help='Name of target host.')
@utils.arg('--on-shared-storage',
dest='on_shared_storage',
action="store_true",
default=False,
help='Specifies whether all instances files are on shared storage')
def do_host_evacuate(cs, args):
"""Evacuate all instances from failed host to specified one."""
hypervisors = cs.hypervisors.search(args.host, servers=True)
response = []
for hyper in hypervisors:
if hasattr(hyper, 'servers'):
for server in hyper.servers:
response.append(_server_evacuate(cs, server, args))
utils.print_list(response,
["Server UUID", "Evacuate Accepted", "Error Message"])
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