mirror of https://github.com/k3s-io/k3s
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package versioned
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import (
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"fmt"
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autoscalingv1 "k8s.io/api/autoscaling/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/kubectl/pkg/generate"
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)
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// HorizontalPodAutoscalerGeneratorV1 supports stable generation of a horizontal pod autoscaler.
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type HorizontalPodAutoscalerGeneratorV1 struct {
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Name string
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ScaleRefKind string
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ScaleRefName string
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ScaleRefAPIVersion string
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MinReplicas int32
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MaxReplicas int32
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CPUPercent int32
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}
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// Ensure it supports the generator pattern that uses parameters specified during construction.
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var _ generate.StructuredGenerator = &HorizontalPodAutoscalerGeneratorV1{}
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// StructuredGenerate outputs a horizontal pod autoscaler object using the configured fields.
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func (s *HorizontalPodAutoscalerGeneratorV1) StructuredGenerate() (runtime.Object, error) {
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if err := s.validate(); err != nil {
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return nil, err
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}
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scaler := autoscalingv1.HorizontalPodAutoscaler{
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ObjectMeta: metav1.ObjectMeta{
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Name: s.Name,
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},
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Spec: autoscalingv1.HorizontalPodAutoscalerSpec{
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ScaleTargetRef: autoscalingv1.CrossVersionObjectReference{
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Kind: s.ScaleRefKind,
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Name: s.ScaleRefName,
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APIVersion: s.ScaleRefAPIVersion,
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},
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MaxReplicas: s.MaxReplicas,
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},
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}
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if s.MinReplicas > 0 {
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v := int32(s.MinReplicas)
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scaler.Spec.MinReplicas = &v
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}
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if s.CPUPercent >= 0 {
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c := int32(s.CPUPercent)
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scaler.Spec.TargetCPUUtilizationPercentage = &c
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}
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return &scaler, nil
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}
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// validate check if the caller has set the right fields.
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func (s HorizontalPodAutoscalerGeneratorV1) validate() error {
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if len(s.Name) == 0 {
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return fmt.Errorf("name must be specified")
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}
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if s.MaxReplicas < 1 {
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return fmt.Errorf("'max' is a required parameter and must be at least 1")
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}
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if s.MinReplicas > s.MaxReplicas {
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return fmt.Errorf("'max' must be greater than or equal to 'min'")
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}
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return nil
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}
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