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bb89f2cbb8
This introduces a polymorphic scale client capable of operating against scale subresources which return different group-versions of Scale. The scale subresources may be in group-versions different than the scale itself, so that we no longer need a copy of every scalable resource in the extensions API group. To discovery which Scale group-versions go to which subresources, discovery is used. The scale client maintains its own internal versions and conversions to several external versions, with a "hub" version that's a copy of the autoscaling internal version. It currently supports the following group-versions for Scale subresources: - extensions/v1beta1.Scale - autoscaling/v1.Scale Kubernetes-commit: d61a2d90372c301dd11088df8941acf2bb01c38c
88 lines
2.7 KiB
Go
88 lines
2.7 KiB
Go
/*
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Copyright 2017 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 extensionsv1beta1
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import (
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"fmt"
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v1beta1 "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/conversion"
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"k8s.io/apimachinery/pkg/runtime"
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scheme "k8s.io/client-go/scale/scheme"
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)
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// addConversions registers conversions between the internal version
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// of Scale and supported external versions of Scale.
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func addConversionFuncs(scheme *runtime.Scheme) error {
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err := scheme.AddConversionFuncs(
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Convert_scheme_ScaleStatus_To_v1beta1_ScaleStatus,
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Convert_v1beta1_ScaleStatus_To_scheme_ScaleStatus,
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)
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if err != nil {
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return err
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}
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return nil
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}
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func Convert_scheme_ScaleStatus_To_v1beta1_ScaleStatus(in *scheme.ScaleStatus, out *v1beta1.ScaleStatus, s conversion.Scope) error {
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out.Replicas = in.Replicas
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out.Selector = nil
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out.TargetSelector = ""
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if in.Selector != nil {
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if in.Selector.MatchExpressions == nil || len(in.Selector.MatchExpressions) == 0 {
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out.Selector = in.Selector.MatchLabels
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}
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selector, err := metav1.LabelSelectorAsSelector(in.Selector)
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if err != nil {
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return fmt.Errorf("invalid label selector: %v", err)
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}
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out.TargetSelector = selector.String()
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}
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return nil
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}
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func Convert_v1beta1_ScaleStatus_To_scheme_ScaleStatus(in *v1beta1.ScaleStatus, out *scheme.ScaleStatus, s conversion.Scope) error {
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out.Replicas = in.Replicas
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// Normally when 2 fields map to the same internal value we favor the old field, since
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// old clients can't be expected to know about new fields but clients that know about the
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// new field can be expected to know about the old field (though that's not quite true, due
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// to kubectl apply). However, these fields are readonly, so any non-nil value should work.
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if in.TargetSelector != "" {
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labelSelector, err := metav1.ParseToLabelSelector(in.TargetSelector)
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if err != nil {
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out.Selector = nil
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return fmt.Errorf("failed to parse target selector: %v", err)
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}
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out.Selector = labelSelector
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} else if in.Selector != nil {
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out.Selector = new(metav1.LabelSelector)
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selector := make(map[string]string)
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for key, val := range in.Selector {
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selector[key] = val
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}
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out.Selector.MatchLabels = selector
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} else {
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out.Selector = nil
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}
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return nil
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}
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