5c86a54d20
By the input parameter "metrics", it makes decision to migrate a VM base on cpu or memory utilization. Change-Id: I35cce3495c8dacad64ea6c6ee71082a85e9e0a83
103 lines
2.5 KiB
ReStructuredText
103 lines
2.5 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``
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**goal**: ``workload_balancing``
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.. watcher-term:: watcher.decision_engine.strategy.strategies.workload_balance
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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_util`` ceilometer_ none
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``memory.resident`` ceilometer_ none
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======================= ============ ======= =======
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.. _ceilometer: http://docs.openstack.org/admin-guide/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 'cpu_util' Workload balance base on cpu or ram
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utilization. choice: ['cpu_util',
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'memory.resident']
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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=cpu_util
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External Links
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--------------
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None.
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