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install.go
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install.go
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package install
import (
"fmt"
"github.com/golang/glog"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/meta"
"k8s.io/kubernetes/pkg/api/unversioned"
"k8s.io/kubernetes/pkg/apimachinery"
"k8s.io/kubernetes/pkg/apimachinery/registered"
"k8s.io/kubernetes/pkg/runtime"
"k8s.io/kubernetes/pkg/util/sets"
"github.com/openshift/origin/pkg/template/api"
"github.com/openshift/origin/pkg/template/api/v1"
"github.com/openshift/origin/pkg/template/api/v1beta3"
)
const importPrefix = "github.com/openshift/origin/pkg/template/api"
var accessor = meta.NewAccessor()
// availableVersions lists all known external versions for this group from most preferred to least preferred
var availableVersions = []unversioned.GroupVersion{v1.SchemeGroupVersion, v1beta3.SchemeGroupVersion}
func init() {
registered.RegisterVersions(availableVersions)
externalVersions := []unversioned.GroupVersion{}
for _, v := range availableVersions {
if registered.IsAllowedVersion(v) {
externalVersions = append(externalVersions, v)
}
}
if len(externalVersions) == 0 {
glog.Infof("No version is registered for group %v", api.GroupName)
return
}
if err := registered.EnableVersions(externalVersions...); err != nil {
panic(err)
}
if err := enableVersions(externalVersions); err != nil {
panic(err)
}
}
// TODO: enableVersions should be centralized rather than spread in each API
// group.
// We can combine registered.RegisterVersions, registered.EnableVersions and
// registered.RegisterGroup once we have moved enableVersions there.
func enableVersions(externalVersions []unversioned.GroupVersion) error {
addVersionsToScheme(externalVersions...)
preferredExternalVersion := externalVersions[0]
groupMeta := apimachinery.GroupMeta{
GroupVersion: preferredExternalVersion,
GroupVersions: externalVersions,
RESTMapper: newRESTMapper(externalVersions),
SelfLinker: runtime.SelfLinker(accessor),
InterfacesFor: interfacesFor,
}
if err := registered.RegisterGroup(groupMeta); err != nil {
return err
}
kapi.RegisterRESTMapper(groupMeta.RESTMapper)
return nil
}
func addVersionsToScheme(externalVersions ...unversioned.GroupVersion) {
// add the internal version to Scheme
api.AddToScheme(kapi.Scheme)
// add the enabled external versions to Scheme
for _, v := range externalVersions {
if !registered.IsEnabledVersion(v) {
glog.Errorf("Version %s is not enabled, so it will not be added to the Scheme.", v)
continue
}
switch v {
case v1.SchemeGroupVersion:
v1.AddToScheme(kapi.Scheme)
case v1beta3.SchemeGroupVersion:
v1beta3.AddToScheme(kapi.Scheme)
default:
glog.Errorf("Version %s is not known, so it will not be added to the Scheme.", v)
continue
}
}
}
func newRESTMapper(externalVersions []unversioned.GroupVersion) meta.RESTMapper {
worstToBestGroupVersions := []unversioned.GroupVersion{}
for i := len(externalVersions) - 1; i >= 0; i-- {
worstToBestGroupVersions = append(worstToBestGroupVersions, externalVersions[i])
}
rootScoped := sets.NewString("SubjectAccessReview", "SelfSubjectAccessReview")
ignoredKinds := sets.NewString()
return kapi.NewDefaultRESTMapper(worstToBestGroupVersions, interfacesFor, importPrefix, ignoredKinds, rootScoped)
}
func interfacesFor(version unversioned.GroupVersion) (*meta.VersionInterfaces, error) {
switch version {
case v1.SchemeGroupVersion:
return &meta.VersionInterfaces{
ObjectConvertor: kapi.Scheme,
MetadataAccessor: accessor,
}, nil
case v1beta3.SchemeGroupVersion:
return &meta.VersionInterfaces{
ObjectConvertor: kapi.Scheme,
MetadataAccessor: accessor,
}, nil
default:
g, _ := registered.Group(api.GroupName)
return nil, fmt.Errorf("unsupported storage version: %s (valid: %v)", version, g.GroupVersions)
}
}