77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
# 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 oslo_config import cfg
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from keystone.conf import utils
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backends = cfg.ListOpt(
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'backends',
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default=[],
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help=utils.fmt("""
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Extra `dogpile.cache` backend modules to register with the `dogpile.cache`
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library. It is not necessary to set this value unless you are providing a
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custom KVS backend beyond what `dogpile.cache` already supports.
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"""))
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config_prefix = cfg.StrOpt(
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'config_prefix',
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default='keystone.kvs',
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help=utils.fmt("""
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Prefix for building the configuration dictionary for the KVS region. This
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should not need to be changed unless there is another `dogpile.cache` region
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with the same configuration name.
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"""))
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enable_key_mangler = cfg.BoolOpt(
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'enable_key_mangler',
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default=True,
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help=utils.fmt("""
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Set to false to disable using a key-mangling function, which ensures
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fixed-length keys are used in the KVS store. This is configurable for debugging
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purposes, and it is therefore highly recommended to always leave this set to
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true.
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"""))
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default_lock_timeout = cfg.IntOpt(
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'default_lock_timeout',
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default=5,
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min=0,
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help=utils.fmt("""
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Number of seconds after acquiring a distributed lock that the backend should
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consider the lock to be expired. This option should be tuned relative to the
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longest amount of time that it takes to perform a successful operation. If this
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value is set too low, then a cluster will end up performing work redundantly.
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If this value is set too high, then a cluster will not be able to efficiently
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recover and retry after a failed operation. A non-zero value is recommended if
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the backend supports lock timeouts, as zero prevents locks from expiring
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altogether.
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"""))
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GROUP_NAME = __name__.split('.')[-1]
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ALL_OPTS = [
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backends,
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config_prefix,
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enable_key_mangler,
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default_lock_timeout,
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]
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def register_opts(conf):
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conf.register_opts(ALL_OPTS, group=GROUP_NAME)
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def list_opts():
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return {GROUP_NAME: ALL_OPTS}
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