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config.go
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config.go
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// Copyright 2018 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 apiserver
import (
"strings"
openapinamer "k8s.io/apiserver/pkg/endpoints/openapi"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/client-go/informers"
"github.com/kubernetes-incubator/metrics-server/pkg/apiserver/generic"
generatedopenapi "github.com/kubernetes-incubator/metrics-server/pkg/generated/openapi"
"github.com/kubernetes-incubator/metrics-server/pkg/version"
)
// Config contains configuration for launching an instance of metrics-server.
type Config struct {
GenericConfig *genericapiserver.Config
ProviderConfig generic.ProviderConfig
}
type completedConfig struct {
genericapiserver.CompletedConfig
ProviderConfig *generic.ProviderConfig
}
// Complete fills in any fields not set that are required to have valid data. It's mutating the receiver.
func (c *Config) Complete(informers informers.SharedInformerFactory) completedConfig {
c.GenericConfig.Version = version.VersionInfo()
// enable OpenAPI schemas
c.GenericConfig.OpenAPIConfig = genericapiserver.DefaultOpenAPIConfig(generatedopenapi.GetOpenAPIDefinitions, openapinamer.NewDefinitionNamer(generic.Scheme))
c.GenericConfig.OpenAPIConfig.Info.Title = "Kubernetes metrics-server"
c.GenericConfig.OpenAPIConfig.Info.Version = strings.Split(c.GenericConfig.Version.String(), "-")[0] // TODO(directxman12): remove this once autosetting this doesn't require security definitions
return completedConfig{
CompletedConfig: c.GenericConfig.Complete(informers),
ProviderConfig: &c.ProviderConfig,
}
}
type MetricsServer struct {
*genericapiserver.GenericAPIServer
}
// New returns a new instance of MetricsServer from the given config.
func (c completedConfig) New() (*MetricsServer, error) {
genericServer, err := c.CompletedConfig.New("metrics-server", genericapiserver.NewEmptyDelegate()) // completion is done in Complete, no need for a second time
if err != nil {
return nil, err
}
if err := generic.InstallStorage(c.ProviderConfig, c.SharedInformerFactory.Core().V1(), genericServer); err != nil {
return nil, err
}
return &MetricsServer{
GenericAPIServer: genericServer,
}, nil
}