mirror of https://github.com/k3s-io/k3s
135 lines
4.8 KiB
Go
135 lines
4.8 KiB
Go
/*
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Copyright 2018 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 options
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import (
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"fmt"
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"io"
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"net"
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"net/url"
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"github.com/spf13/pflag"
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v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
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"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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"k8s.io/apiextensions-apiserver/pkg/apiserver"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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utilerrors "k8s.io/apimachinery/pkg/util/errors"
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genericregistry "k8s.io/apiserver/pkg/registry/generic"
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genericapiserver "k8s.io/apiserver/pkg/server"
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genericoptions "k8s.io/apiserver/pkg/server/options"
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"k8s.io/apiserver/pkg/util/proxy"
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"k8s.io/apiserver/pkg/util/webhook"
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corev1 "k8s.io/client-go/listers/core/v1"
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)
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const defaultEtcdPathPrefix = "/registry/apiextensions.kubernetes.io"
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// CustomResourceDefinitionsServerOptions describes the runtime options of an apiextensions-apiserver.
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type CustomResourceDefinitionsServerOptions struct {
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RecommendedOptions *genericoptions.RecommendedOptions
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APIEnablement *genericoptions.APIEnablementOptions
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StdOut io.Writer
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StdErr io.Writer
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}
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// NewCustomResourceDefinitionsServerOptions creates default options of an apiextensions-apiserver.
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func NewCustomResourceDefinitionsServerOptions(out, errOut io.Writer) *CustomResourceDefinitionsServerOptions {
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o := &CustomResourceDefinitionsServerOptions{
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RecommendedOptions: genericoptions.NewRecommendedOptions(
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defaultEtcdPathPrefix,
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apiserver.Codecs.LegacyCodec(v1beta1.SchemeGroupVersion, v1.SchemeGroupVersion),
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),
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APIEnablement: genericoptions.NewAPIEnablementOptions(),
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StdOut: out,
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StdErr: errOut,
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}
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return o
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}
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// AddFlags adds the apiextensions-apiserver flags to the flagset.
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func (o CustomResourceDefinitionsServerOptions) AddFlags(fs *pflag.FlagSet) {
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o.RecommendedOptions.AddFlags(fs)
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o.APIEnablement.AddFlags(fs)
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}
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// Validate validates the apiextensions-apiserver options.
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func (o CustomResourceDefinitionsServerOptions) Validate() error {
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errors := []error{}
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errors = append(errors, o.RecommendedOptions.Validate()...)
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errors = append(errors, o.APIEnablement.Validate(apiserver.Scheme)...)
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return utilerrors.NewAggregate(errors)
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}
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// Complete fills in missing options.
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func (o *CustomResourceDefinitionsServerOptions) Complete() error {
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return nil
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}
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// Config returns an apiextensions-apiserver configuration.
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func (o CustomResourceDefinitionsServerOptions) Config() (*apiserver.Config, error) {
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// TODO have a "real" external address
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if err := o.RecommendedOptions.SecureServing.MaybeDefaultWithSelfSignedCerts("localhost", nil, []net.IP{net.ParseIP("127.0.0.1")}); err != nil {
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return nil, fmt.Errorf("error creating self-signed certificates: %v", err)
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}
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serverConfig := genericapiserver.NewRecommendedConfig(apiserver.Codecs)
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if err := o.RecommendedOptions.ApplyTo(serverConfig); err != nil {
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return nil, err
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}
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if err := o.APIEnablement.ApplyTo(&serverConfig.Config, apiserver.DefaultAPIResourceConfigSource(), apiserver.Scheme); err != nil {
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return nil, err
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}
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config := &apiserver.Config{
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GenericConfig: serverConfig,
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ExtraConfig: apiserver.ExtraConfig{
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CRDRESTOptionsGetter: NewCRDRESTOptionsGetter(*o.RecommendedOptions.Etcd),
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ServiceResolver: &serviceResolver{serverConfig.SharedInformerFactory.Core().V1().Services().Lister()},
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AuthResolverWrapper: webhook.NewDefaultAuthenticationInfoResolverWrapper(nil, nil, serverConfig.LoopbackClientConfig),
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},
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}
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return config, nil
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}
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// NewCRDRESTOptionsGetter create a RESTOptionsGetter for CustomResources.
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func NewCRDRESTOptionsGetter(etcdOptions genericoptions.EtcdOptions) genericregistry.RESTOptionsGetter {
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ret := apiserver.CRDRESTOptionsGetter{
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StorageConfig: etcdOptions.StorageConfig,
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StoragePrefix: etcdOptions.StorageConfig.Prefix,
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EnableWatchCache: etcdOptions.EnableWatchCache,
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DefaultWatchCacheSize: etcdOptions.DefaultWatchCacheSize,
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EnableGarbageCollection: etcdOptions.EnableGarbageCollection,
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DeleteCollectionWorkers: etcdOptions.DeleteCollectionWorkers,
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CountMetricPollPeriod: etcdOptions.StorageConfig.CountMetricPollPeriod,
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}
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ret.StorageConfig.Codec = unstructured.UnstructuredJSONScheme
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return ret
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}
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type serviceResolver struct {
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services corev1.ServiceLister
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}
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func (r *serviceResolver) ResolveEndpoint(namespace, name string, port int32) (*url.URL, error) {
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return proxy.ResolveCluster(r.services, namespace, name, port)
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}
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