99fc35880b
This commit adds support for using kubectl scale to scale deployments. Makes use of the deployments/scale endpoint instead of updating deployment.spec.replicas directly.
86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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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 extensions
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import (
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"fmt"
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"sort"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/util/sets"
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)
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// PodSelectorAsSelector converts the PodSelector api type into a struct that implements
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// labels.Selector
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func PodSelectorAsSelector(ps *PodSelector) (labels.Selector, error) {
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if ps == nil {
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return labels.Nothing(), nil
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}
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if len(ps.MatchLabels)+len(ps.MatchExpressions) == 0 {
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return labels.Everything(), nil
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}
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selector := labels.LabelSelector{}
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for k, v := range ps.MatchLabels {
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req, err := labels.NewRequirement(k, labels.InOperator, sets.NewString(v))
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if err != nil {
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return nil, err
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}
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selector = append(selector, *req)
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}
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for _, expr := range ps.MatchExpressions {
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var op labels.Operator
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switch expr.Operator {
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case PodSelectorOpIn:
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op = labels.InOperator
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case PodSelectorOpNotIn:
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op = labels.NotInOperator
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case PodSelectorOpExists:
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op = labels.ExistsOperator
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case PodSelectorOpDoesNotExist:
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op = labels.DoesNotExistOperator
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default:
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return nil, fmt.Errorf("%q is not a valid pod selector operator", expr.Operator)
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}
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req, err := labels.NewRequirement(expr.Key, op, sets.NewString(expr.Values...))
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if err != nil {
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return nil, err
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}
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selector = append(selector, *req)
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}
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sort.Sort(labels.ByKey(selector))
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return selector, nil
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}
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// ScaleFromDeployment returns a scale subresource for a deployment.
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func ScaleFromDeployment(deployment *Deployment) *Scale {
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return &Scale{
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ObjectMeta: api.ObjectMeta{
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Name: deployment.Name,
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Namespace: deployment.Namespace,
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CreationTimestamp: deployment.CreationTimestamp,
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},
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Spec: ScaleSpec{
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Replicas: deployment.Spec.Replicas,
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},
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Status: ScaleStatus{
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Replicas: deployment.Status.Replicas,
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Selector: deployment.Spec.Selector,
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},
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}
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}
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