mirror of
https://github.com/k3s-io/kubernetes.git
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130 lines
4.0 KiB
Go
130 lines
4.0 KiB
Go
/*
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Copyright 2016 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 install installs the experimental API group, making it available as
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// an option to all of the API encoding/decoding machinery.
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package install
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import (
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"fmt"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/meta"
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"k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/apimachinery"
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"k8s.io/kubernetes/pkg/apimachinery/registered"
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"k8s.io/kubernetes/pkg/apis/authentication"
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"k8s.io/kubernetes/pkg/apis/authentication/v1beta1"
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"k8s.io/kubernetes/pkg/runtime"
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"k8s.io/kubernetes/pkg/util/sets"
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)
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const importPrefix = "k8s.io/kubernetes/pkg/apis/authentication"
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var accessor = meta.NewAccessor()
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// availableVersions lists all known external versions for this group from most preferred to least preferred
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var availableVersions = []unversioned.GroupVersion{v1beta1.SchemeGroupVersion}
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func init() {
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registered.RegisterVersions(availableVersions)
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externalVersions := []unversioned.GroupVersion{}
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for _, v := range availableVersions {
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if registered.IsAllowedVersion(v) {
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externalVersions = append(externalVersions, v)
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}
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}
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if len(externalVersions) == 0 {
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glog.V(4).Infof("No version is registered for group %v", authentication.GroupName)
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return
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}
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if err := registered.EnableVersions(externalVersions...); err != nil {
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glog.V(4).Infof("%v", err)
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return
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}
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if err := enableVersions(externalVersions); err != nil {
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glog.V(4).Infof("%v", err)
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return
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}
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}
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// TODO: enableVersions should be centralized rather than spread in each API
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// group.
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// We can combine registered.RegisterVersions, registered.EnableVersions and
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// registered.RegisterGroup once we have moved enableVersions there.
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func enableVersions(externalVersions []unversioned.GroupVersion) error {
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addVersionsToScheme(externalVersions...)
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preferredExternalVersion := externalVersions[0]
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groupMeta := apimachinery.GroupMeta{
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GroupVersion: preferredExternalVersion,
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GroupVersions: externalVersions,
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RESTMapper: newRESTMapper(externalVersions),
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SelfLinker: runtime.SelfLinker(accessor),
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InterfacesFor: interfacesFor,
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}
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if err := registered.RegisterGroup(groupMeta); err != nil {
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return err
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}
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api.RegisterRESTMapper(groupMeta.RESTMapper)
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return nil
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}
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func addVersionsToScheme(externalVersions ...unversioned.GroupVersion) {
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// add the internal version to Scheme
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if err := authentication.AddToScheme(api.Scheme); err != nil {
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// Programmer error, detect immediately
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panic(err)
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}
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// add the enabled external versions to Scheme
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for _, v := range externalVersions {
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if !registered.IsEnabledVersion(v) {
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glog.Errorf("Version %s is not enabled, so it will not be added to the Scheme.", v)
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continue
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}
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switch v {
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case v1beta1.SchemeGroupVersion:
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if err := v1beta1.AddToScheme(api.Scheme); err != nil {
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// Programmer error, detect immediately
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panic(err)
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}
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}
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}
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}
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func newRESTMapper(externalVersions []unversioned.GroupVersion) meta.RESTMapper {
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rootScoped := sets.NewString("TokenReview")
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ignoredKinds := sets.NewString()
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return api.NewDefaultRESTMapper(externalVersions, interfacesFor, importPrefix, ignoredKinds, rootScoped)
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}
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func interfacesFor(version unversioned.GroupVersion) (*meta.VersionInterfaces, error) {
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switch version {
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case v1beta1.SchemeGroupVersion:
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return &meta.VersionInterfaces{
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ObjectConvertor: api.Scheme,
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MetadataAccessor: accessor,
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}, nil
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default:
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g, _ := registered.Group(authentication.GroupName)
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return nil, fmt.Errorf("unsupported storage version: %s (valid: %v)", version, g.GroupVersions)
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}
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}
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