Lucian Petrut 00fea975e2 Handle deprecated "cpu_util" metric

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

2023-10-24 10:47:23 +00:00

2.8 KiB

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Workload Balance Migration Strategy

Synopsis

display name: Workload Balance Migration Strategy

goal: workload_balancing

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` `memory.resident`	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

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

Planner

Default Watcher's planner:

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 ?

$ 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