45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
# Copyright (c) 2012 OpenStack, LLC.
|
|
# 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 manila.openstack.common import log as logging
|
|
from manila.openstack.common.scheduler import filters
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class RetryFilter(filters.BaseHostFilter):
|
|
"""Filter out already tried nodes for scheduling purposes."""
|
|
|
|
def host_passes(self, host_state, filter_properties):
|
|
"""Skip nodes that have already been attempted."""
|
|
retry = filter_properties.get('retry', None)
|
|
if not retry:
|
|
# Re-scheduling is disabled
|
|
LOG.debug("Re-scheduling is disabled")
|
|
return True
|
|
|
|
hosts = retry.get('hosts', [])
|
|
host = host_state.host
|
|
|
|
passes = host not in hosts
|
|
pass_msg = "passes" if passes else "fails"
|
|
|
|
LOG.debug("Host %(host)s %(pass_msg)s. Previously tried hosts: "
|
|
"%(hosts)s" %
|
|
{"host": host, "pass_msg": pass_msg, "hosts": hosts})
|
|
|
|
# Host passes if it's not in the list of previously attempted hosts:
|
|
return passes
|