suzhengwei d2f70f9d6f change ram util metric

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

2017-08-07 16:04:19 +08:00

3.2 KiB

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VM Workload Consolidation Strategy

Synopsis

display name: vm_workload_consolidation

goal: vm_consolidation

watcher.decision_engine.strategy.strategies.vm_workload_consolidation

Requirements

Metrics

The vm_workload_consolidation strategy requires the following metrics:

metric	service name	plugins	comment
`memory` `disk.root.size`	ceilometer ceilometer	none none

The following metrics are not required but increase the accuracy of the strategy if available:

metric	service name	plugins	comment
`memory.resident` `cpu_util`	ceilometer ceilometer	none none

Cluster data model

Default Watcher's Compute cluster data model:

watcher.decision_engine.model.collector.nova.NovaClusterDataModelCollector

Actions

Default Watcher's actions:

action description

migration

watcher.applier.actions.migration.Migrate

change_nova_service_state

watcher.applier.actions.change_nova_service_state.ChangeNovaServiceState

action	description
`migration`	watcher.applier.actions.migration.Migrate
`change_nova_service_state`	watcher.applier.actions.change_nova_service_state.ChangeNovaServiceState

Planner

Default Watcher's planner:

watcher.decision_engine.planner.weight.WeightPlanner

Configuration

Strategy parameter is:

parameter	type	default Value	description
`period`	Number	3600	The time interval in seconds for getting statistic aggregation from metric data source

Efficacy Indicator

watcher.decision_engine.goal.efficacy.specs.ServerConsolidation.get_global_efficacy_indicator

Algorithm

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

How to use it ?

$ openstack optimize audittemplate create \
  at1 server_consolidation --strategy vm_workload_consolidation

$ openstack optimize audit create -a at1

External Links

Spec URL https://specs.openstack.org/openstack/watcher-specs/specs/mitaka/implemented/zhaw-load-consolidation.html

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