watcher/doc/source/strategies/saving_energy.rst

Saving Energy Strategy

Synopsis

display name: Saving Energy Strategy

goal: saving_energy

watcher.decision_engine.strategy.strategies.saving_energy.SavingEnergy

Requirements

This feature will use Ironic to do the power on/off actions, therefore this feature requires that the ironic component is configured. And the compute node should be managed by Ironic.

Ironic installation: https://docs.openstack.org/ironic/latest/install/index.html

Cluster data model

Default Watcher's Compute cluster data model:

watcher.decision_engine.model.collector.nova.NovaClusterDataModelCollector

Actions

action	description
change_node_power_state	watcher.applier.actions.change_node_power_state.ChangeNodePowerState

Planner

Default Watcher's planner:

watcher.decision_engine.planner.weight.WeightPlanner

Configuration

Strategy parameter is:

parameter	type	default Value	description
======================	======	=======	======================================
free_used_percent	Number	10.0	a rational number, which describes the the quotient of min_free_hosts_num/nodes_with_VMs_num
min_free_hosts_num	Int	1	an int number describes minimum free compute nodes

Efficacy Indicator

None

Algorithm

For more information on the Energy Saving Strategy please refer to: http://specs.openstack.org/openstack/watcher-specs/specs/pike/implemented/energy-saving-strategy.html

How to use it ?

step1: Add compute nodes info into ironic node management

$ ironic node-create  -d pxe_ipmitool -i ipmi_address=10.43.200.184 \
  ipmi_username=root  -i ipmi_password=nomoresecret -e compute_node_id=3

step 2: Create audit to do optimization

$ openstack optimize audittemplate create \
  at1 saving_energy --strategy saving_energy

$ openstack optimize audit create -a at1 \
  -p free_used_percent=20.0

External Links

None