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===================================
Workload Balance Migration Strategy
===================================
Synopsis
--------
**display name**: ``Workload Balance Migration Strategy``
**goal**: ``workload_balancing``
.. watcher-term:: watcher.decision_engine.strategy.strategies.workload_balance.WorkloadBalance
Requirements
------------
None.
Metrics
*******
The *workload_balance* strategy requires the following metrics:
======================= ============ ======= =========================
metric service name plugins comment
======================= ============ ======= =========================
``cpu`` ceilometer_ none
``memory.resident`` ceilometer_ none
======================= ============ ======= =========================
.. _ceilometer: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#openstack-compute
Cluster data model
******************
Default Watcher's Compute cluster data model:
.. watcher-term:: watcher.decision_engine.model.collector.nova.NovaClusterDataModelCollector
Actions
*******
Default Watcher's actions:
.. list-table::
:widths: 30 30
:header-rows: 1
* - action
- description
* - ``migration``
- .. watcher-term:: watcher.applier.actions.migration.Migrate
Planner
*******
Default Watcher's planner:
.. watcher-term:: watcher.decision_engine.planner.weight.WeightPlanner
Configuration
-------------
Strategy parameters are:
============== ====== ==================== ====================================
parameter type default Value description
============== ====== ==================== ====================================
``metrics`` String 'instance_cpu_usage' Workload balance base on cpu or ram
utilization. Choices:
['instance_cpu_usage',
'instance_ram_usage']
``threshold`` Number 25.0 Workload threshold for migration
``period`` Number 300 Aggregate time period of ceilometer
============== ====== ==================== ====================================
Efficacy Indicator
------------------
None
Algorithm
---------
For more information on the Workload Balance Migration Strategy please refer
to: https://specs.openstack.org/openstack/watcher-specs/specs/mitaka/implemented/workload-balance-migration-strategy.html
How to use it ?
---------------
.. code-block:: shell
$ openstack optimize audittemplate create \
at1 workload_balancing --strategy workload_balance
$ openstack optimize audit create -a at1 -p threshold=26.0 \
-p period=310 -p metrics=instance_cpu_usage
External Links
--------------
None.
|
