conf: Reorder scheduler opts
This will make upcoming changes that group and rework these opts easier to review. Change-Id: I6ce42c59a31684d39ec787aa35f39a7fb3fef796 Blueprint centralize-config-options-ocata
This commit is contained in:
Stephen Finucane
parent
c4ce5f1104
commit
9723864b88
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@ -25,175 +25,7 @@ METRICS_GROUP_NAME = "metrics"
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TRUSTED_GROUP_NAME = "trusted_computing"
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host_subset_size_opt = cfg.IntOpt("scheduler_host_subset_size",
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default=1,
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help="""
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New instances will be scheduled on a host chosen randomly from a subset of the
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N best hosts, where N is the value set by this option. Valid values are 1 or
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greater. Any value less than one will be treated as 1.
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Setting this to a value greater than 1 will reduce the chance that multiple
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scheduler processes handling similar requests will select the same host,
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creating a potential race condition. By selecting a host randomly from the N
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hosts that best fit the request, the chance of a conflict is reduced. However,
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the higher you set this value, the less optimal the chosen host may be for a
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given request.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any integer, although any value less than 1 will be treated as 1
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""")
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bm_default_filter_opt = cfg.ListOpt("baremetal_scheduler_default_filters",
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default=[
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"RetryFilter",
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"AvailabilityZoneFilter",
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"ComputeFilter",
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"ComputeCapabilitiesFilter",
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"ImagePropertiesFilter",
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"ExactRamFilter",
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"ExactDiskFilter",
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"ExactCoreFilter",
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],
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help="""
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This option specifies the filters used for filtering baremetal hosts. The value
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should be a list of strings, with each string being the name of a filter class
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to be used. When used, they will be applied in order, so place your most
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restrictive filters first to make the filtering process more efficient.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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to be used for selecting a baremetal host.
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Related options:
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* If the 'scheduler_use_baremetal_filters' option is False, this option has
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no effect.
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""")
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use_bm_filters_opt = cfg.BoolOpt("scheduler_use_baremetal_filters",
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default=False,
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help="""
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Set this to True to tell the nova scheduler that it should use the filters
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specified in the 'baremetal_scheduler_default_filters' option. If you are not
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scheduling baremetal nodes, leave this at the default setting of False.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Related options:
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* If this option is set to True, then the filters specified in the
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'baremetal_scheduler_default_filters' are used instead of the filters
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specified in 'scheduler_default_filters'.
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""")
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host_mgr_avail_filt_opt = cfg.MultiStrOpt("scheduler_available_filters",
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default=["nova.scheduler.filters.all_filters"],
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help="""
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This is an unordered list of the filter classes the Nova scheduler may apply.
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Only the filters specified in the 'scheduler_default_filters' option will be
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used, but any filter appearing in that option must also be included in this
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list.
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By default, this is set to all filters that are included with Nova. If you wish
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to change this, replace this with a list of strings, where each element is the
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path to a filter.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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that may be used for selecting a host.
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Related options:
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* scheduler_default_filters
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""")
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host_mgr_default_filt_opt = cfg.ListOpt("scheduler_default_filters",
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default=[
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"RetryFilter",
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"AvailabilityZoneFilter",
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"RamFilter",
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"DiskFilter",
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"ComputeFilter",
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"ComputeCapabilitiesFilter",
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"ImagePropertiesFilter",
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"ServerGroupAntiAffinityFilter",
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"ServerGroupAffinityFilter",
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],
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help="""
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This option is the list of filter class names that will be used for filtering
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hosts. The use of 'default' in the name of this option implies that other
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filters may sometimes be used, but that is not the case. These filters will be
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applied in the order they are listed, so place your most restrictive filters
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first to make the filtering process more efficient.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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to be used for selecting a host.
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Related options:
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* All of the filters in this option *must* be present in the
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'scheduler_available_filters' option, or a SchedulerHostFilterNotFound
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exception will be raised.
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""")
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host_mgr_sched_wgt_cls_opt = cfg.ListOpt("scheduler_weight_classes",
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default=["nova.scheduler.weights.all_weighers"],
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help="""
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This is a list of weigher class names. Only hosts which pass the filters are
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weighed. The weight for any host starts at 0, and the weighers order these
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hosts by adding to or subtracting from the weight assigned by the previous
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weigher. Weights may become negative.
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An instance will be scheduled to one of the N most-weighted hosts, where N is
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'scheduler_host_subset_size'.
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By default, this is set to all weighers that are included with Nova. If you
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wish to change this, replace this with a list of strings, where each element is
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the path to a weigher.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a
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weigher that will be used for selecting a host.
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""")
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host_mgr_tracks_inst_chg_opt = cfg.BoolOpt("scheduler_tracks_instance_changes",
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default=True,
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help="""
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The scheduler may need information about the instances on a host in order to
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evaluate its filters and weighers. The most common need for this information is
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for the (anti-)affinity filters, which need to choose a host based on the
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instances already running on a host.
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If the configured filters and weighers do not need this information, disabling
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this option will improve performance. It may also be disabled when the tracking
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overhead proves too heavy, although this will cause classes requiring host
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usage data to query the database on each request instead.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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""")
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# scheduler opts
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rpc_sched_topic_opt = cfg.StrOpt("scheduler_topic",
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default="scheduler",
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@ -291,6 +123,306 @@ Related options:
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* ``nova-service service_down_time``
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""")
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scheduler_max_att_opt = cfg.IntOpt("scheduler_max_attempts",
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default=3,
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help="""
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This is the maximum number of attempts that will be made to schedule an
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instance before it is assumed that the failures aren't due to normal occasional
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race conflicts, but rather some other problem. When this is reached a
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MaxRetriesExceeded exception is raised, and the instance is set to an error
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state.
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Possible values:
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* Any positive integer
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""")
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# filter scheduler opts
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host_subset_size_opt = cfg.IntOpt("scheduler_host_subset_size",
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default=1,
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help="""
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New instances will be scheduled on a host chosen randomly from a subset of the
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N best hosts, where N is the value set by this option. Valid values are 1 or
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greater. Any value less than one will be treated as 1.
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Setting this to a value greater than 1 will reduce the chance that multiple
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scheduler processes handling similar requests will select the same host,
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creating a potential race condition. By selecting a host randomly from the N
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hosts that best fit the request, the chance of a conflict is reduced. However,
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the higher you set this value, the less optimal the chosen host may be for a
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given request.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any integer, although any value less than 1 will be treated as 1
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""")
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max_io_ops_per_host_opt = cfg.IntOpt("max_io_ops_per_host",
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default=8,
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help="""
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This setting caps the number of instances on a host that can be actively
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performing IO (in a build, resize, snapshot, migrate, rescue, or unshelve task
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state) before that host becomes ineligible to build new instances.
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Valid values are positive integers: 1 or greater.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect. Also note that this setting
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only affects scheduling if the 'io_ops_filter' filter is enabled.
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Possible values:
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* Any integer is valid, although a value of zero or less will cause all hosts
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to fail the IoOpsFilter.
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""")
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max_instances_per_host_opt = cfg.IntOpt("max_instances_per_host",
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default=50,
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help="""
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If you need to limit the number of instances on any given host, set this option
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to the maximum number of instances you want to allow. The num_instances_filter
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will reject any host that has at least as many instances as this option's
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value.
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Valid values are positive integers; setting it to zero or less will cause all
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hosts to be rejected if the num_instances_filter is active.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect. Also note that this setting
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only affects scheduling if the 'num_instances_filter' filter is enabled.
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Possible values:
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* Any integer, although setting it to zero or less will cause all hosts to be
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rejected if the num_instances_filter is active.
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""")
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host_mgr_tracks_inst_chg_opt = cfg.BoolOpt("scheduler_tracks_instance_changes",
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default=True,
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help="""
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The scheduler may need information about the instances on a host in order to
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evaluate its filters and weighers. The most common need for this information is
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for the (anti-)affinity filters, which need to choose a host based on the
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instances already running on a host.
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If the configured filters and weighers do not need this information, disabling
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this option will improve performance. It may also be disabled when the tracking
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overhead proves too heavy, although this will cause classes requiring host
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usage data to query the database on each request instead.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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""")
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host_mgr_avail_filt_opt = cfg.MultiStrOpt("scheduler_available_filters",
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default=["nova.scheduler.filters.all_filters"],
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help="""
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This is an unordered list of the filter classes the Nova scheduler may apply.
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Only the filters specified in the 'scheduler_default_filters' option will be
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used, but any filter appearing in that option must also be included in this
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list.
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By default, this is set to all filters that are included with Nova. If you wish
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to change this, replace this with a list of strings, where each element is the
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path to a filter.
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This option is only used by the FilterScheduler and its subclasses; if you use
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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that may be used for selecting a host.
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Related options:
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* scheduler_default_filters
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""")
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host_mgr_default_filt_opt = cfg.ListOpt("scheduler_default_filters",
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default=[
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"RetryFilter",
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"AvailabilityZoneFilter",
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"RamFilter",
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"DiskFilter",
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"ComputeFilter",
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"ComputeCapabilitiesFilter",
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"ImagePropertiesFilter",
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"ServerGroupAntiAffinityFilter",
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"ServerGroupAffinityFilter",
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],
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help="""
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This option is the list of filter class names that will be used for filtering
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hosts. The use of 'default' in the name of this option implies that other
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filters may sometimes be used, but that is not the case. These filters will be
|
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applied in the order they are listed, so place your most restrictive filters
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first to make the filtering process more efficient.
|
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This option is only used by the FilterScheduler and its subclasses; if you use
|
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a different scheduler, this option has no effect.
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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to be used for selecting a host.
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Related options:
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* All of the filters in this option *must* be present in the
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'scheduler_available_filters' option, or a SchedulerHostFilterNotFound
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exception will be raised.
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""")
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bm_default_filter_opt = cfg.ListOpt("baremetal_scheduler_default_filters",
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default=[
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"RetryFilter",
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"AvailabilityZoneFilter",
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"ComputeFilter",
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"ComputeCapabilitiesFilter",
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"ImagePropertiesFilter",
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"ExactRamFilter",
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"ExactDiskFilter",
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"ExactCoreFilter",
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],
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help="""
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This option specifies the filters used for filtering baremetal hosts. The value
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should be a list of strings, with each string being the name of a filter class
|
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to be used. When used, they will be applied in order, so place your most
|
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restrictive filters first to make the filtering process more efficient.
|
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|
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This option is only used by the FilterScheduler and its subclasses; if you use
|
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a different scheduler, this option has no effect.
|
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Possible values:
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* Any list of zero or more strings, with each string being the name of a filter
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to be used for selecting a baremetal host.
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Related options:
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* If the 'scheduler_use_baremetal_filters' option is False, this option has
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no effect.
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""")
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use_bm_filters_opt = cfg.BoolOpt("scheduler_use_baremetal_filters",
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default=False,
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help="""
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Set this to True to tell the nova scheduler that it should use the filters
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specified in the 'baremetal_scheduler_default_filters' option. If you are not
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scheduling baremetal nodes, leave this at the default setting of False.
|
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|
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This option is only used by the FilterScheduler and its subclasses; if you use
|
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a different scheduler, this option has no effect.
|
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Related options:
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|
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* If this option is set to True, then the filters specified in the
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'baremetal_scheduler_default_filters' are used instead of the filters
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specified in 'scheduler_default_filters'.
|
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""")
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host_mgr_sched_wgt_cls_opt = cfg.ListOpt("scheduler_weight_classes",
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default=["nova.scheduler.weights.all_weighers"],
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help="""
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This is a list of weigher class names. Only hosts which pass the filters are
|
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weighed. The weight for any host starts at 0, and the weighers order these
|
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hosts by adding to or subtracting from the weight assigned by the previous
|
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weigher. Weights may become negative.
|
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|
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An instance will be scheduled to one of the N most-weighted hosts, where N is
|
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'scheduler_host_subset_size'.
|
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|
||||
By default, this is set to all weighers that are included with Nova. If you
|
||||
wish to change this, replace this with a list of strings, where each element is
|
||||
the path to a weigher.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
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a different scheduler, this option has no effect.
|
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|
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Possible values:
|
||||
|
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* Any list of zero or more strings, with each string being the name of a
|
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weigher that will be used for selecting a host.
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""")
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ram_weight_mult_opt = cfg.FloatOpt("ram_weight_multiplier",
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default=1.0,
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help="""
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This option determines how hosts with more or less available RAM are weighed. A
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positive value will result in the scheduler preferring hosts with more
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available RAM, and a negative number will result in the scheduler preferring
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hosts with less available RAM. Another way to look at it is that positive
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values for this option will tend to spread instances across many hosts, while
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negative values will tend to fill up (stack) hosts as much as possible before
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scheduling to a less-used host. The absolute value, whether positive or
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negative, controls how strong the RAM weigher is relative to other weighers.
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This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
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only affects scheduling if the 'ram' weigher is enabled.
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Valid values are numeric, either integer or float.
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Possible values:
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* Any numeric value
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""")
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disk_weight_mult_opt = cfg.FloatOpt("disk_weight_multiplier",
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default=1.0,
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help="Multiplier used for weighing free disk space. Negative "
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"numbers mean to stack vs spread.")
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io_ops_weight_mult_opt = cfg.FloatOpt("io_ops_weight_multiplier",
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default=-1.0,
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help="""
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This option determines how hosts with differing workloads are weighed. Negative
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values, such as the default, will result in the scheduler preferring hosts with
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lighter workloads whereas positive values will prefer hosts with heavier
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workloads. Another way to look at it is that positive values for this option
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will tend to schedule instances onto hosts that are already busy, while
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negative values will tend to distribute the workload across more hosts. The
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absolute value, whether positive or negative, controls how strong the io_ops
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weigher is relative to other weighers.
|
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|
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This option is only used by the FilterScheduler and its subclasses; if you use
|
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a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'io_ops' weigher is enabled.
|
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|
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Valid values are numeric, either integer or float.
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Possible values:
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* Any numeric value
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""")
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soft_affinity_weight_opt = cfg.FloatOpt("soft_affinity_weight_multiplier",
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default=1.0,
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help="""
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This is the multiplier used for weighing hosts for group soft-affinity.
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Possible values:
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* Any numeric, although only a positive value is meaningful, as negative values
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would make this behave as a soft-anti-affinity weigher.
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""")
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||||
|
||||
soft_anti_affinity_weight_opt = cfg.FloatOpt(
|
||||
"soft_anti_affinity_weight_multiplier",
|
||||
default=1.0,
|
||||
help="""
|
||||
This is the multiplier used for weighing hosts for group soft-anti-affinity.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any numeric, although only a positive value is meaningful, as negative values
|
||||
would make this behave as a soft-affinity weigher.
|
||||
""")
|
||||
|
||||
isolated_img_opt = cfg.ListOpt("isolated_images",
|
||||
default=[],
|
||||
help="""
|
||||
|
|
@ -353,6 +485,58 @@ Related options:
|
|||
* scheduler/isolated_hosts
|
||||
""")
|
||||
|
||||
agg_img_prop_iso_namespace_opt = cfg.StrOpt(
|
||||
"aggregate_image_properties_isolation_namespace",
|
||||
help="""
|
||||
Images and hosts can be configured so that certain images can only be scheduled
|
||||
to hosts in a particular aggregate. This is done with metadata values set on
|
||||
the host aggregate that are identified by beginning with the value of this
|
||||
option. If the host is part of an aggregate with such a metadata key, the image
|
||||
in the request spec must have the value of that metadata in its properties in
|
||||
order for the scheduler to consider the host as acceptable.
|
||||
|
||||
Valid values are strings.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'aggregate_image_properties_isolation' filter is
|
||||
enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any string
|
||||
|
||||
Related options:
|
||||
|
||||
* aggregate_image_properties_isolation_separator
|
||||
""")
|
||||
|
||||
agg_img_prop_iso_separator_opt = cfg.StrOpt(
|
||||
"aggregate_image_properties_isolation_separator",
|
||||
default=".",
|
||||
help="""
|
||||
When using the aggregate_image_properties_isolation filter, the relevant
|
||||
metadata keys are prefixed with the namespace defined in the
|
||||
aggregate_image_properties_isolation_namespace configuration option plus a
|
||||
separator. This option defines the separator to be used. It defaults to a
|
||||
period ('.').
|
||||
|
||||
Valid values are strings.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'aggregate_image_properties_isolation' filter is
|
||||
enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any string
|
||||
|
||||
Related options:
|
||||
|
||||
* aggregate_image_properties_isolation_namespace
|
||||
""")
|
||||
|
||||
# These opts are registered as a separate OptGroup
|
||||
trusted_opts = [
|
||||
cfg.StrOpt("attestation_server",
|
||||
|
|
@ -543,149 +727,6 @@ Related options:
|
|||
"""),
|
||||
]
|
||||
|
||||
max_io_ops_per_host_opt = cfg.IntOpt("max_io_ops_per_host",
|
||||
default=8,
|
||||
help="""
|
||||
This setting caps the number of instances on a host that can be actively
|
||||
performing IO (in a build, resize, snapshot, migrate, rescue, or unshelve task
|
||||
state) before that host becomes ineligible to build new instances.
|
||||
|
||||
Valid values are positive integers: 1 or greater.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'io_ops_filter' filter is enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any integer is valid, although a value of zero or less will cause all hosts
|
||||
to fail the IoOpsFilter.
|
||||
""")
|
||||
|
||||
agg_img_prop_iso_namespace_opt = cfg.StrOpt(
|
||||
"aggregate_image_properties_isolation_namespace",
|
||||
help="""
|
||||
Images and hosts can be configured so that certain images can only be scheduled
|
||||
to hosts in a particular aggregate. This is done with metadata values set on
|
||||
the host aggregate that are identified by beginning with the value of this
|
||||
option. If the host is part of an aggregate with such a metadata key, the image
|
||||
in the request spec must have the value of that metadata in its properties in
|
||||
order for the scheduler to consider the host as acceptable.
|
||||
|
||||
Valid values are strings.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'aggregate_image_properties_isolation' filter is
|
||||
enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any string
|
||||
|
||||
Related options:
|
||||
|
||||
* aggregate_image_properties_isolation_separator
|
||||
""")
|
||||
|
||||
agg_img_prop_iso_separator_opt = cfg.StrOpt(
|
||||
"aggregate_image_properties_isolation_separator",
|
||||
default=".",
|
||||
help="""
|
||||
When using the aggregate_image_properties_isolation filter, the relevant
|
||||
metadata keys are prefixed with the namespace defined in the
|
||||
aggregate_image_properties_isolation_namespace configuration option plus a
|
||||
separator. This option defines the separator to be used. It defaults to a
|
||||
period ('.').
|
||||
|
||||
Valid values are strings.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'aggregate_image_properties_isolation' filter is
|
||||
enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any string
|
||||
|
||||
Related options:
|
||||
|
||||
* aggregate_image_properties_isolation_namespace
|
||||
""")
|
||||
|
||||
max_instances_per_host_opt = cfg.IntOpt("max_instances_per_host",
|
||||
default=50,
|
||||
help="""
|
||||
If you need to limit the number of instances on any given host, set this option
|
||||
to the maximum number of instances you want to allow. The num_instances_filter
|
||||
will reject any host that has at least as many instances as this option's
|
||||
value.
|
||||
|
||||
Valid values are positive integers; setting it to zero or less will cause all
|
||||
hosts to be rejected if the num_instances_filter is active.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'num_instances_filter' filter is enabled.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any integer, although setting it to zero or less will cause all hosts to be
|
||||
rejected if the num_instances_filter is active.
|
||||
""")
|
||||
|
||||
ram_weight_mult_opt = cfg.FloatOpt("ram_weight_multiplier",
|
||||
default=1.0,
|
||||
help="""
|
||||
This option determines how hosts with more or less available RAM are weighed. A
|
||||
positive value will result in the scheduler preferring hosts with more
|
||||
available RAM, and a negative number will result in the scheduler preferring
|
||||
hosts with less available RAM. Another way to look at it is that positive
|
||||
values for this option will tend to spread instances across many hosts, while
|
||||
negative values will tend to fill up (stack) hosts as much as possible before
|
||||
scheduling to a less-used host. The absolute value, whether positive or
|
||||
negative, controls how strong the RAM weigher is relative to other weighers.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'ram' weigher is enabled.
|
||||
|
||||
Valid values are numeric, either integer or float.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any numeric value
|
||||
""")
|
||||
|
||||
disk_weight_mult_opt = cfg.FloatOpt("disk_weight_multiplier",
|
||||
default=1.0,
|
||||
help="Multiplier used for weighing free disk space. Negative "
|
||||
"numbers mean to stack vs spread.")
|
||||
|
||||
io_ops_weight_mult_opt = cfg.FloatOpt("io_ops_weight_multiplier",
|
||||
default=-1.0,
|
||||
help="""
|
||||
This option determines how hosts with differing workloads are weighed. Negative
|
||||
values, such as the default, will result in the scheduler preferring hosts with
|
||||
lighter workloads whereas positive values will prefer hosts with heavier
|
||||
workloads. Another way to look at it is that positive values for this option
|
||||
will tend to schedule instances onto hosts that are already busy, while
|
||||
negative values will tend to distribute the workload across more hosts. The
|
||||
absolute value, whether positive or negative, controls how strong the io_ops
|
||||
weigher is relative to other weighers.
|
||||
|
||||
This option is only used by the FilterScheduler and its subclasses; if you use
|
||||
a different scheduler, this option has no effect. Also note that this setting
|
||||
only affects scheduling if the 'io_ops' weigher is enabled.
|
||||
|
||||
Valid values are numeric, either integer or float.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any numeric value
|
||||
""")
|
||||
|
||||
# These opts are registered as a separate OptGroup
|
||||
metrics_weight_opts = [
|
||||
cfg.FloatOpt("weight_multiplier",
|
||||
|
|
@ -796,43 +837,6 @@ Related options:
|
|||
"""),
|
||||
]
|
||||
|
||||
scheduler_max_att_opt = cfg.IntOpt("scheduler_max_attempts",
|
||||
default=3,
|
||||
help="""
|
||||
This is the maximum number of attempts that will be made to schedule an
|
||||
instance before it is assumed that the failures aren't due to normal occasional
|
||||
race conflicts, but rather some other problem. When this is reached a
|
||||
MaxRetriesExceeded exception is raised, and the instance is set to an error
|
||||
state.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any positive integer
|
||||
""")
|
||||
|
||||
soft_affinity_weight_opt = cfg.FloatOpt("soft_affinity_weight_multiplier",
|
||||
default=1.0,
|
||||
help="""
|
||||
This is the multiplier used for weighing hosts for group soft-affinity.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any numeric, although only a positive value is meaningful, as negative values
|
||||
would make this behave as a soft-anti-affinity weigher.
|
||||
""")
|
||||
|
||||
soft_anti_affinity_weight_opt = cfg.FloatOpt(
|
||||
"soft_anti_affinity_weight_multiplier",
|
||||
default=1.0,
|
||||
help="""
|
||||
This is the multiplier used for weighing hosts for group soft-anti-affinity.
|
||||
|
||||
Possible values:
|
||||
|
||||
* Any numeric, although only a positive value is meaningful, as negative values
|
||||
would make this behave as a soft-affinity weigher.
|
||||
""")
|
||||
|
||||
|
||||
default_opts = [host_subset_size_opt,
|
||||
bm_default_filter_opt,
|
||||
|
|
|
|||
Loading…
Reference in New Issue