0d678ed4bb
Added a new extension that adds the ability for admins to evacuate an entire host to another host. This internally uses the existing server.evacuate api. The target host is optional so that a free host will be chosen by the scheduler in the api. Implements: blueprint evacuate-host Change-Id: I2352836d01952e281e15edb9bdd1b912106516d6
60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
# Copyright 2013 Rackspace Hosting
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from novaclient import base
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from novaclient import utils
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class EvacuateHostResponse(base.Resource):
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pass
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def _server_evacuate(cs, server, args):
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success = True
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error_message = ""
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try:
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cs.servers.evacuate(server['uuid'], args.target_host,
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args.on_shared_storage)
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except Exception as e:
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success = False
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error_message = "Error while evacuating instance: %s" % e
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return EvacuateHostResponse(base.Manager,
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{"server_uuid": server['uuid'],
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"evacuate_accepted": success,
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"error_message": error_message})
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@utils.arg('host', metavar='<host>', help='Name of host.')
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@utils.arg('--target_host',
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metavar='<target_host>',
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default=None,
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help='Name of target host.')
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@utils.arg('--on-shared-storage',
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dest='on_shared_storage',
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action="store_true",
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default=False,
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help='Specifies whether all instances files are on shared storage')
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def do_host_evacuate(cs, args):
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"""Evacuate all instances from failed host to specified one."""
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hypervisors = cs.hypervisors.search(args.host, servers=True)
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response = []
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for hyper in hypervisors:
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if hasattr(hyper, 'servers'):
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for server in hyper.servers:
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response.append(_server_evacuate(cs, server, args))
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utils.print_list(response,
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["Server UUID", "Evacuate Accepted", "Error Message"])
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