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[config-ref] add Compute cell scheduling filters 

backport: mitaka liberty

Change-Id: Idbf3190319ab04c172dac41b66296b47c7ea1043
Closes-Bug: #1538292
This commit is contained in:
KATO Tomoyuki 2016-06-18 12:19:46 +09:00
parent c29e3e8c15
commit 356fc08f16
1 changed files with 31 additions and 6 deletions
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37
doc/config-reference/source/compute/scheduler.rst
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@ -62,6 +62,8 @@ see `Evacuate instances <http://docs.openstack.org/admin-guide/
compute-node-down.html#evacuate-instances>`_ section of the compute-node-down.html#evacuate-instances>`_ section of the
OpenStack Administrator Guide. OpenStack Administrator Guide.
.. _compute-scheduler-filters:
Filter scheduler Filter scheduler
~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~
@ -70,11 +72,6 @@ is the default scheduler for scheduling virtual machine instances.
It supports filtering and weighting to make informed decisions on It supports filtering and weighting to make informed decisions on
where a new instance should be created. where a new instance should be created.
.. _compute-scheduler-filters:
Filters
~~~~~~~
When the filter scheduler receives a request for a resource, it first When the filter scheduler receives a request for a resource, it first
applies filters to determine which hosts are eligible for consideration applies filters to determine which hosts are eligible for consideration
when dispatching a resource. Filters are binary: either a host is when dispatching a resource. Filters are binary: either a host is
@ -113,7 +110,10 @@ service. The default filters are:
scheduler_default_filters = RetryFilter, AvailabilityZoneFilter, RamFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, ServerGroupAntiAffinityFilter, ServerGroupAffinityFilter scheduler_default_filters = RetryFilter, AvailabilityZoneFilter, RamFilter, ComputeFilter, ComputeCapabilitiesFilter, ImagePropertiesFilter, ServerGroupAntiAffinityFilter, ServerGroupAffinityFilter
The following sections describe the available filters. Compute filters
~~~~~~~~~~~~~~~
The following sections describe the available compute filters.
AggregateCoreFilter AggregateCoreFilter
------------------- -------------------
@ -801,6 +801,31 @@ Dynamically limits hosts to one instance type. An instance can only be
launched on a host, if no instance with different instances types launched on a host, if no instance with different instances types
are running on it, or if the host has no running instances at all. are running on it, or if the host has no running instances at all.
Cell filters
~~~~~~~~~~~~
The following sections describe the available cell filters.
DifferentCellFilter
-------------------
Schedules the instance on a different cell from a set of instances.
To take advantage of this filter, the requester must pass a scheduler hint,
using ``different_cell`` as the key and a list of instance UUIDs as the value.
ImagePropertiesFilter
---------------------
Filters cells based on properties defined on the instance’s image.
This filter works specifying the hypervisor required in the image
metadata and the supported hypervisor version in cell capabilities.
TargetCellFilter
----------------
Filters target cells. This filter works by specifying a scheduler
hint of ``target_cell``. The value should be the full cell path.
.. _weights: .. _weights:
Weights Weights