00fea975e2
The "cpu_util" metric has been deprecated a few years ago. We'll obtain the same result by converting the cumulative cpu time to a percentage, leveraging the rate of change aggregation. Change-Id: I18fe0de6f74c785e674faceea0c48f44055818fe
104 lines
2.8 KiB
ReStructuredText
104 lines
2.8 KiB
ReStructuredText
===================================
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Workload Balance Migration Strategy
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===================================
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Synopsis
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--------
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**display name**: ``Workload Balance Migration Strategy``
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**goal**: ``workload_balancing``
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.. watcher-term:: watcher.decision_engine.strategy.strategies.workload_balance.WorkloadBalance
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Requirements
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------------
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None.
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Metrics
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*******
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The *workload_balance* strategy requires the following metrics:
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======================= ============ ======= =========================
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metric service name plugins comment
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======================= ============ ======= =========================
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``cpu`` ceilometer_ none
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``memory.resident`` ceilometer_ none
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======================= ============ ======= =========================
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.. _ceilometer: https://docs.openstack.org/ceilometer/latest/admin/telemetry-measurements.html#openstack-compute
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Cluster data model
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******************
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Default Watcher's Compute cluster data model:
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.. watcher-term:: watcher.decision_engine.model.collector.nova.NovaClusterDataModelCollector
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Actions
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*******
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Default Watcher's actions:
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.. list-table::
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:widths: 30 30
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:header-rows: 1
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* - action
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- description
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* - ``migration``
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- .. watcher-term:: watcher.applier.actions.migration.Migrate
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Planner
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*******
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Default Watcher's planner:
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.. watcher-term:: watcher.decision_engine.planner.weight.WeightPlanner
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Configuration
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-------------
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Strategy parameters are:
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============== ====== ==================== ====================================
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parameter type default Value description
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============== ====== ==================== ====================================
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``metrics`` String 'instance_cpu_usage' Workload balance base on cpu or ram
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utilization. Choices:
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['instance_cpu_usage',
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'instance_ram_usage']
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``threshold`` Number 25.0 Workload threshold for migration
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``period`` Number 300 Aggregate time period of ceilometer
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============== ====== ==================== ====================================
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Efficacy Indicator
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------------------
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None
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Algorithm
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---------
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For more information on the Workload Balance Migration Strategy please refer
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to: https://specs.openstack.org/openstack/watcher-specs/specs/mitaka/implemented/workload-balance-migration-strategy.html
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How to use it ?
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---------------
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.. code-block:: shell
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$ openstack optimize audittemplate create \
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at1 workload_balancing --strategy workload_balance
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$ openstack optimize audit create -a at1 -p threshold=26.0 \
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-p period=310 -p metrics=instance_cpu_usage
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External Links
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--------------
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None.
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