d2f70f9d6f
Metric 'memory.usage' depends on balloon driver, and shows the memory usage inside guest-os, while 'memory.resident' represents volume of RAM used by the instance on the physical machine So, it is more reasonable to use 'memory.resident' when calculating node utilization by gathering instances utilization of the node. Change-Id: I12dff5176bcf6cb103aa44cafd54f9ecd7170864
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3.2 KiB
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115 lines
3.2 KiB
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==================================
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VM Workload Consolidation Strategy
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==================================
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Synopsis
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--------
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**display name**: ``vm_workload_consolidation``
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**goal**: ``vm_consolidation``
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.. watcher-term:: watcher.decision_engine.strategy.strategies.vm_workload_consolidation
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Requirements
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------------
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Metrics
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*******
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The *vm_workload_consolidation* 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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``memory`` ceilometer_ none
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``disk.root.size`` ceilometer_ none
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============================ ============ ======= =======
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The following metrics are not required but increase the accuracy of
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the strategy if available:
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============================ ============ ======= =======
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metric service name plugins comment
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============================ ============ ======= =======
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``memory.resident`` ceilometer_ none
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``cpu_util`` 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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* - ``change_nova_service_state``
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- .. watcher-term:: watcher.applier.actions.change_nova_service_state.ChangeNovaServiceState
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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 parameter is:
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====================== ====== ============= ===================================
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parameter type default Value description
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====================== ====== ============= ===================================
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``period`` Number 3600 The time interval in seconds
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for getting statistic aggregation
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from metric data source
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====================== ====== ============= ===================================
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Efficacy Indicator
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------------------
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.. watcher-func::
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:format: literal_block
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watcher.decision_engine.goal.efficacy.specs.ServerConsolidation.get_global_efficacy_indicator
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Algorithm
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---------
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For more information on the VM Workload consolidation strategy please refer to: https://specs.openstack.org/openstack/watcher-specs/specs/mitaka/implemented/zhaw-load-consolidation.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 server_consolidation --strategy vm_workload_consolidation
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$ openstack optimize audit create -a at1
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External Links
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--------------
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*Spec URL*
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https://specs.openstack.org/openstack/watcher-specs/specs/mitaka/implemented/zhaw-load-consolidation.html
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