scheduler configuration options
| Configuration option = Default value | Description |
|---|---|
| [DEFAULT] | |
aggregate_image_properties_isolation_namespace =None |
(StrOpt) Force the filter to consider only keys matching the given namespace. |
aggregate_image_properties_isolation_separator =. |
(StrOpt) The separator used between the namespace and keys |
baremetal_scheduler_default_filters =RetryFilter, AvailabilityZoneFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, ExactRamFilter, ExactDiskFilter, ExactCoreFilter |
(ListOpt) Which filter class names to use for filtering baremetal hosts when not specified in the request. |
cpu_allocation_ratio = 0.0 |
(FloatOpt) Virtual CPU to physical CPU allocation ratio which affects all CPU filters. This configuration specifies a global ratio for CoreFilter. For AggregateCoreFilter, it will fall back to this configuration value if no per-aggregate setting found. NOTE: This can be set per-compute, or if set to 0.0, the value set on the scheduler node(s) will be used and defaulted to 16.0 |
disk_allocation_ratio = 1.0 |
(FloatOpt) Virtual disk to physical disk allocation ratio |
io_ops_weight_multiplier = -1.0 |
(FloatOpt) Multiplier used for weighing host io ops. Negative numbers mean a preference to choose light workload compute hosts. |
isolated_hosts = |
(ListOpt) Host reserved for specific images |
isolated_images = |
(ListOpt) Images to run on isolated host |
max_instances_per_host = 50 |
(IntOpt) Ignore hosts that have too many instances |
max_io_ops_per_host = 8 |
(IntOpt) Tells filters to ignore hosts that have this many or more instances currently in build, resize, snapshot, migrate, rescue or unshelve task states 用在IoOpsFilter中，num_io_host在host_state中。 |
ram_allocation_ratio = 0.0 |
(FloatOpt) Virtual ram to physical ram allocation ratio which affects all ram filters. This configuration specifies a global ratio for RamFilter. For AggregateRamFilter, it will fall back to this configuration value if no per-aggregate setting found. NOTE: This can be set per-compute, or if set to 0.0, the value set on the scheduler node(s) will be used and defaulted to 1.5 |
ram_weight_multiplier = 1.0 |
(FloatOpt) Multiplier used for weighing ram. Negative numbers mean to stack vs spread. |
reserved_host_disk_mb = 0 |
(IntOpt) Amount of disk in MB to reserve for the host |
reserved_host_memory_mb = 512 |
(IntOpt) Amount of memory in MB to reserve for the host |
restrict_isolated_hosts_to_isolated_images = True |
(BoolOpt) Whether to force isolated hosts to run only isolated images |
scheduler_available_filters =['nova.scheduler.filters.all_filters'] |
(MultiStrOpt) Filter classes available to the scheduler which may be specified more than once. An entry of "nova.scheduler.filters.all_filters" maps to all filters included with nova. |
scheduler_default_filters = RetryFilter, AvailabilityZoneFilter, RamFilter, DiskFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, ServerGroupAntiAffinityFilter, ServerGroupAffinityFilter |
(ListOpt) Which filter class names to use for filtering hosts when not specified in the request. |
scheduler_driver =nova.scheduler.filter_scheduler.FilterScheduler |
(StrOpt) Default driver to use for the scheduler |
scheduler_driver_task_period = 60 |
(IntOpt) How often (in seconds) to run periodic tasks in the scheduler driver of your choice. Please note this is likely to interact with the value of service_down_time, but exactly how they interact will depend on your choice of scheduler driver. |
scheduler_host_manager =nova.scheduler.host_manager.HostManager |
(StrOpt) The scheduler host manager class to use |
scheduler_host_subset_size = 1 |
(IntOpt) New instances will be scheduled on a host chosen randomly from a subset of the N best hosts. This property defines the subset size that a host is chosen from. A value of 1 chooses the first host returned by the weighing functions. This value must be at least 1. Any value less than 1 will be ignored, and 1 will be used instead |
scheduler_instance_sync_interval = 120 |
(IntOpt) Waiting time interval (seconds) between sending the scheduler a list of current instance UUIDs to verify that its view of instances is in sync with nova. If the CONF option `scheduler_tracks_instance_changes` is False, changing this option will have no effect. 为nova compute manager中的一个周期任务 |
scheduler_json_config_location = |
(StrOpt) Absolute path to scheduler configuration JSON file. |
scheduler_manager =nova.scheduler.manager.SchedulerManager |
(StrOpt) Full class name for the Manager for scheduler |
scheduler_max_attempts = 3 |
(IntOpt) Maximum number of attempts to schedule an instance |
scheduler_topic = scheduler |
(StrOpt) The topic scheduler nodes listen on |
scheduler_tracks_instance_changes = True |
(BoolOpt) Determines if the Scheduler tracks changes to instances to help with its filtering decisions. |
scheduler_use_baremetal_filters = False |
(BoolOpt) Flag to decide whether to use baremetal_scheduler_default_filters or not. |
scheduler_weight_classes =nova.scheduler.weights.all_weighers |
(ListOpt) Which weight class names to use for weighing hosts |
http://docs.openstack.org/liberty/config-reference/content/list-of-compute-config-options.html#config_table_nova_scheduler
