/
defaults.go
136 lines (122 loc) · 4.72 KB
/
defaults.go
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/*
Copyright 2023 Vesoft Inc.
Copyright 2021 The Kubernetes 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 v1alpha1
import (
autoscalingv2 "k8s.io/api/autoscaling/v2"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/utils/pointer"
)
const DefaultCPUUtilization = 80
var (
// These constants repeat previous HPA behavior
scaleUpLimitPercent int32 = 100
scaleUpLimitMinimumPods int32 = 4
scaleUpPeriod int32 = 15
scaleUpStabilizationSeconds int32
maxPolicy = autoscalingv2.MaxChangePolicySelect
defaultHPAScaleUpRules = autoscalingv2.HPAScalingRules{
StabilizationWindowSeconds: &scaleUpStabilizationSeconds,
SelectPolicy: &maxPolicy,
Policies: []autoscalingv2.HPAScalingPolicy{
{
Type: autoscalingv2.PodsScalingPolicy,
Value: scaleUpLimitMinimumPods,
PeriodSeconds: scaleUpPeriod,
},
{
Type: autoscalingv2.PercentScalingPolicy,
Value: scaleUpLimitPercent,
PeriodSeconds: scaleUpPeriod,
},
},
}
scaleDownPeriod int32 = 15
scaleDownStabilizationSeconds int32 = 300
// Currently we can set the downscaleStabilizationWindow from the command line
// So we can not rewrite the command line option from here
scaleDownLimitPercent int32 = 100
defaultHPAScaleDownRules = autoscalingv2.HPAScalingRules{
StabilizationWindowSeconds: &scaleDownStabilizationSeconds,
SelectPolicy: &maxPolicy,
Policies: []autoscalingv2.HPAScalingPolicy{
{
Type: autoscalingv2.PercentScalingPolicy,
Value: scaleDownLimitPercent,
PeriodSeconds: scaleDownPeriod,
},
},
}
)
func addDefaultingFuncs(scheme *runtime.Scheme) error {
return RegisterDefaults(scheme)
}
func SetDefaults_NebulaAutoscaler(obj *NebulaAutoscaler) {
if obj.Spec.GraphdPolicy.MinReplicas == nil {
obj.Spec.GraphdPolicy.MinReplicas = pointer.Int32(1)
}
if len(obj.Spec.GraphdPolicy.Metrics) == 0 {
utilizationDefaultVal := int32(DefaultCPUUtilization)
obj.Spec.GraphdPolicy.Metrics = []autoscalingv2.MetricSpec{
{
Type: autoscalingv2.ResourceMetricSourceType,
Resource: &autoscalingv2.ResourceMetricSource{
Name: corev1.ResourceCPU,
Target: autoscalingv2.MetricTarget{
Type: autoscalingv2.UtilizationMetricType,
AverageUtilization: &utilizationDefaultVal,
},
},
},
}
}
SetDefaults_NebulaAutoscalerBehavior(obj)
}
// SetDefaults_NebulaAutoscalerBehavior fills the behavior if it is not null
func SetDefaults_NebulaAutoscalerBehavior(obj *NebulaAutoscaler) {
// if behavior is specified, we should fill all the 'nil' values with the default ones
if obj.Spec.GraphdPolicy.Behavior != nil {
obj.Spec.GraphdPolicy.Behavior.ScaleUp = GenerateHPAScaleUpRules(obj.Spec.GraphdPolicy.Behavior.ScaleUp)
obj.Spec.GraphdPolicy.Behavior.ScaleDown = GenerateHPAScaleDownRules(obj.Spec.GraphdPolicy.Behavior.ScaleDown)
}
}
// GenerateHPAScaleUpRules returns a fully-initialized HPAScalingRules value
// We guarantee that no pointer in the structure will have the 'nil' value
func GenerateHPAScaleUpRules(scalingRules *autoscalingv2.HPAScalingRules) *autoscalingv2.HPAScalingRules {
defaultScalingRules := defaultHPAScaleUpRules.DeepCopy()
return copyHPAScalingRules(scalingRules, defaultScalingRules)
}
// GenerateHPAScaleDownRules returns a fully-initialized HPAScalingRules value
// We guarantee that no pointer in the structure will have the 'nil' value
// EXCEPT StabilizationWindowSeconds, for reasoning check the comment for defaultHPAScaleDownRules
func GenerateHPAScaleDownRules(scalingRules *autoscalingv2.HPAScalingRules) *autoscalingv2.HPAScalingRules {
defaultScalingRules := defaultHPAScaleDownRules.DeepCopy()
return copyHPAScalingRules(scalingRules, defaultScalingRules)
}
// copyHPAScalingRules copies all non-`nil` fields in HPA constraint structure
func copyHPAScalingRules(from, to *autoscalingv2.HPAScalingRules) *autoscalingv2.HPAScalingRules {
if from == nil {
return to
}
if from.SelectPolicy != nil {
to.SelectPolicy = from.SelectPolicy
}
if from.StabilizationWindowSeconds != nil {
to.StabilizationWindowSeconds = from.StabilizationWindowSeconds
}
if from.Policies != nil {
to.Policies = from.Policies
}
return to
}