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policy.go
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policy.go
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/*
Copyright 2022 The Katalyst Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package headroompolicy
import (
"sync"
"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/metacache"
"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/types"
"github.com/kubewharf/katalyst-core/pkg/config"
"github.com/kubewharf/katalyst-core/pkg/metaserver"
"github.com/kubewharf/katalyst-core/pkg/metrics"
"github.com/kubewharf/katalyst-core/pkg/util/machine"
)
// todo: implement advanced headroom policies for different regions
// HeadroomPolicy generates resource headroom estimation based on configured algorithm
type HeadroomPolicy interface {
// SetPodSet overwrites policy's pod/container record
SetPodSet(types.PodSet)
// SetBindingNumas overwrites the numa ids this policy interested in
SetBindingNumas(machine.CPUSet)
// SetEssentials updates essential values for policy update
SetEssentials(essentials types.ResourceEssentials)
// Update triggers an episode of headroom update
Update() error
// GetHeadroom returns the latest legal headroom estimation
GetHeadroom() (float64, error)
}
type InitFunc func(regionName string, regionType types.QoSRegionType, ownerPoolName string,
conf *config.Configuration, extraConfig interface{}, metaReader metacache.MetaReader,
metaServer *metaserver.MetaServer, emitter metrics.MetricEmitter) HeadroomPolicy
var initializers sync.Map
func RegisterInitializer(name types.CPUHeadroomPolicyName, initFunc InitFunc) {
initializers.Store(name, initFunc)
}
func GetRegisteredInitializers() map[types.CPUHeadroomPolicyName]InitFunc {
res := make(map[types.CPUHeadroomPolicyName]InitFunc)
initializers.Range(func(key, value interface{}) bool {
res[key.(types.CPUHeadroomPolicyName)] = value.(InitFunc)
return true
})
return res
}