101 lines
3.4 KiB
Python
101 lines
3.4 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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imagecache_group = cfg.OptGroup(
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'image_cache',
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title='Image Cache Options',
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help="""
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A collection of options specific to image caching.
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""")
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imagecache_opts = [
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cfg.IntOpt('manager_interval',
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default=2400,
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min=-1,
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deprecated_name='image_cache_manager_interval',
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deprecated_group='DEFAULT',
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help="""
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Number of seconds to wait between runs of the image cache manager.
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Note that when using shared storage for the ``[DEFAULT]/instances_path``
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configuration option across multiple nova-compute services, this periodic
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could process a large number of instances. Similarly, using a compute driver
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that manages a cluster (like vmwareapi.VMwareVCDriver) could result in
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processing a large number of instances. Therefore you may need to adjust the
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time interval for the anticipated load, or only run on one nova-compute
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service within a shared storage aggregate.
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Possible values:
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* 0: run at the default interval of 60 seconds (not recommended)
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* -1: disable
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* Any other value
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Related options:
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* ``[DEFAULT]/compute_driver``
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* ``[DEFAULT]/instances_path``
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"""),
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cfg.StrOpt('subdirectory_name',
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default='_base',
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deprecated_name='image_cache_subdirectory_name',
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deprecated_group='DEFAULT',
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help="""
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Location of cached images.
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This is NOT the full path - just a folder name relative to '$instances_path'.
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For per-compute-host cached images, set to '_base_$my_ip'
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"""),
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cfg.BoolOpt('remove_unused_base_images',
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default=True,
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deprecated_group='DEFAULT',
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help='Should unused base images be removed?'),
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cfg.IntOpt('remove_unused_original_minimum_age_seconds',
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default=(24 * 3600),
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deprecated_group='DEFAULT',
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help="""
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Unused unresized base images younger than this will not be removed.
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"""),
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cfg.IntOpt('remove_unused_resized_minimum_age_seconds',
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default=3600,
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deprecated_group='libvirt',
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help="""
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Unused resized base images younger than this will not be removed.
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"""),
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cfg.IntOpt('precache_concurrency',
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default=1,
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min=1,
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help="""
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Maximum number of compute hosts to trigger image precaching in parallel.
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When an image precache request is made, compute nodes will be contacted
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to initiate the download. This number constrains the number of those that
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will happen in parallel. Higher numbers will cause more computes to work
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in parallel and may result in reduced time to complete the operation, but
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may also DDoS the image service. Lower numbers will result in more sequential
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operation, lower image service load, but likely longer runtime to completion.
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"""),
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]
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ALL_OPTS = (imagecache_opts,)
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def register_opts(conf):
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conf.register_group(imagecache_group)
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conf.register_opts(imagecache_opts, group=imagecache_group)
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def list_opts():
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return {imagecache_group: imagecache_opts}
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