mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
synced 2026-04-06 17:57:51 +00:00
d02384477a
The latest boilerplate comes with a lot of simplifications and helpers that let us reduce the amount of code written.
109 lines
3.5 KiB
Go
109 lines
3.5 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 apiserver
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import (
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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/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/runtime/serializer"
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"k8s.io/apimachinery/pkg/version"
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genericapiserver "k8s.io/apiserver/pkg/server"
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"k8s.io/client-go/informers"
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"github.com/kubernetes-incubator/custom-metrics-apiserver/pkg/provider"
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cminstall "k8s.io/metrics/pkg/apis/custom_metrics/install"
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eminstall "k8s.io/metrics/pkg/apis/external_metrics/install"
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)
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var (
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Scheme = runtime.NewScheme()
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Codecs = serializer.NewCodecFactory(Scheme)
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)
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func init() {
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cminstall.Install(Scheme)
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eminstall.Install(Scheme)
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// we need to add the options to empty v1
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// TODO fix the server code to avoid this
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metav1.AddToGroupVersion(Scheme, schema.GroupVersion{Version: "v1"})
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// TODO: keep the generic API server from wanting this
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unversioned := schema.GroupVersion{Group: "", Version: "v1"}
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Scheme.AddUnversionedTypes(unversioned,
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&metav1.Status{},
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&metav1.APIVersions{},
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&metav1.APIGroupList{},
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&metav1.APIGroup{},
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&metav1.APIResourceList{},
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)
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}
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type Config struct {
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GenericConfig *genericapiserver.Config
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}
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// CustomMetricsAdapterServer contains state for a Kubernetes cluster master/api server.
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type CustomMetricsAdapterServer struct {
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GenericAPIServer *genericapiserver.GenericAPIServer
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customMetricsProvider provider.CustomMetricsProvider
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externalMetricsProvider provider.ExternalMetricsProvider
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}
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type completedConfig struct {
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genericapiserver.CompletedConfig
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}
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// Complete fills in any fields not set that are required to have valid data. It's mutating the receiver.
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func (c *Config) Complete(informers informers.SharedInformerFactory) completedConfig {
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c.GenericConfig.Version = &version.Info{
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Major: "1",
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Minor: "0",
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}
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return completedConfig{c.GenericConfig.Complete(informers)}
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}
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// New returns a new instance of CustomMetricsAdapterServer from the given config.
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// name is used to differentiate for logging.
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// Each of the arguments: customMetricsProvider, externalMetricsProvider can be set either to
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// a provider implementation, or to nil to disable one of the APIs.
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func (c completedConfig) New(name string, customMetricsProvider provider.CustomMetricsProvider, externalMetricsProvider provider.ExternalMetricsProvider) (*CustomMetricsAdapterServer, error) {
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genericServer, err := c.CompletedConfig.New(name, genericapiserver.NewEmptyDelegate()) // completion is done in Complete, no need for a second time
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if err != nil {
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return nil, err
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}
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s := &CustomMetricsAdapterServer{
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GenericAPIServer: genericServer,
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customMetricsProvider: customMetricsProvider,
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externalMetricsProvider: externalMetricsProvider,
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}
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if customMetricsProvider != nil {
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if err := s.InstallCustomMetricsAPI(); err != nil {
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return nil, err
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}
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}
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if externalMetricsProvider != nil {
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if err := s.InstallExternalMetricsAPI(); err != nil {
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return nil, err
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}
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}
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return s, nil
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}
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