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start.go
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start.go
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/*
Copyright 2017 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 server
import (
"fmt"
"io"
"net"
"github.com/spf13/cobra"
"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
"k8s.io/apiextensions-apiserver/pkg/apiserver"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
genericregistry "k8s.io/apiserver/pkg/registry/generic"
genericapiserver "k8s.io/apiserver/pkg/server"
genericoptions "k8s.io/apiserver/pkg/server/options"
)
const defaultEtcdPathPrefix = "/registry/apiextensions.kubernetes.io"
type CustomResourceDefinitionsServerOptions struct {
RecommendedOptions *genericoptions.RecommendedOptions
APIEnablement *genericoptions.APIEnablementOptions
StdOut io.Writer
StdErr io.Writer
}
func NewCustomResourceDefinitionsServerOptions(out, errOut io.Writer) *CustomResourceDefinitionsServerOptions {
o := &CustomResourceDefinitionsServerOptions{
RecommendedOptions: genericoptions.NewRecommendedOptions(defaultEtcdPathPrefix, apiserver.Codecs.LegacyCodec(v1beta1.SchemeGroupVersion)),
APIEnablement: genericoptions.NewAPIEnablementOptions(),
StdOut: out,
StdErr: errOut,
}
// the shared informer is not needed for kube-aggregator. Disable the kubeconfig flag and the client creation.
o.RecommendedOptions.CoreAPI = nil
return o
}
func NewCommandStartCustomResourceDefinitionsServer(out, errOut io.Writer, stopCh <-chan struct{}) *cobra.Command {
o := NewCustomResourceDefinitionsServerOptions(out, errOut)
cmd := &cobra.Command{
Short: "Launch an API extensions API server",
Long: "Launch an API extensions API server",
RunE: func(c *cobra.Command, args []string) error {
if err := o.Complete(); err != nil {
return err
}
if err := o.Validate(args); err != nil {
return err
}
if err := o.RunCustomResourceDefinitionsServer(stopCh); err != nil {
return err
}
return nil
},
}
flags := cmd.Flags()
o.RecommendedOptions.AddFlags(flags)
o.APIEnablement.AddFlags(flags)
return cmd
}
func (o CustomResourceDefinitionsServerOptions) Validate(args []string) error {
errors := []error{}
errors = append(errors, o.RecommendedOptions.Validate()...)
errors = append(errors, o.APIEnablement.Validate(apiserver.Registry)...)
return utilerrors.NewAggregate(errors)
}
func (o *CustomResourceDefinitionsServerOptions) Complete() error {
return nil
}
func (o CustomResourceDefinitionsServerOptions) Config() (*apiserver.Config, error) {
// TODO have a "real" external address
if err := o.RecommendedOptions.SecureServing.MaybeDefaultWithSelfSignedCerts("localhost", nil, []net.IP{net.ParseIP("127.0.0.1")}); err != nil {
return nil, fmt.Errorf("error creating self-signed certificates: %v", err)
}
serverConfig := genericapiserver.NewRecommendedConfig(apiserver.Codecs)
if err := o.RecommendedOptions.ApplyTo(serverConfig, apiserver.Scheme); err != nil {
return nil, err
}
if err := o.APIEnablement.ApplyTo(&serverConfig.Config, apiserver.DefaultAPIResourceConfigSource(), apiserver.Registry); err != nil {
return nil, err
}
config := &apiserver.Config{
GenericConfig: serverConfig,
ExtraConfig: apiserver.ExtraConfig{
CRDRESTOptionsGetter: NewCRDRESTOptionsGetter(*o.RecommendedOptions.Etcd),
},
}
return config, nil
}
func NewCRDRESTOptionsGetter(etcdOptions genericoptions.EtcdOptions) genericregistry.RESTOptionsGetter {
ret := apiserver.CRDRESTOptionsGetter{
StorageConfig: etcdOptions.StorageConfig,
StoragePrefix: etcdOptions.StorageConfig.Prefix,
EnableWatchCache: etcdOptions.EnableWatchCache,
DefaultWatchCacheSize: etcdOptions.DefaultWatchCacheSize,
EnableGarbageCollection: etcdOptions.EnableGarbageCollection,
DeleteCollectionWorkers: etcdOptions.DeleteCollectionWorkers,
}
ret.StorageConfig.Codec = unstructured.UnstructuredJSONScheme
return ret
}
func (o CustomResourceDefinitionsServerOptions) RunCustomResourceDefinitionsServer(stopCh <-chan struct{}) error {
config, err := o.Config()
if err != nil {
return err
}
server, err := config.Complete().New(genericapiserver.EmptyDelegate)
if err != nil {
return err
}
return server.GenericAPIServer.PrepareRun().Run(stopCh)
}