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crd_registry.go
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/
crd_registry.go
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package helpers
import (
"context"
"fmt"
"sort"
"sync"
"github.com/solo-io/go-utils/contextutils"
"k8s.io/utils/pointer"
"github.com/solo-io/solo-kit/pkg/api/v1/clients/kube/crd"
"github.com/rotisserie/eris"
"github.com/solo-io/go-utils/versionutils/kubeapi"
"github.com/solo-io/k8s-utils/kubeutils"
v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apiexts "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// The CRDRegistry is designed to be used only by tests
// We have moved CRD registration responsibilities outside of this repository.
// However, this is still useful as a testing utility
type crdRegistry struct {
crds []crd.MultiVersionCrd
mu sync.RWMutex
}
var (
registry *crdRegistry
VersionExistsError = func(groupKind schema.GroupKind, version string) error {
return eris.Errorf("tried adding version %s for group kind %s, but it already exists", version, groupKind.String())
}
NotFoundError = func(id string) error {
return eris.Errorf("could not find the combined crd for %v", id)
}
InvalidGVKError = func(gvk schema.GroupVersionKind) error {
return eris.Errorf("the following gvk %v does not correspond to a crd in the combined crd object", gvk)
}
)
func init() {
registry = &crdRegistry{}
}
func getRegistry() *crdRegistry {
return registry
}
func AddAndRegisterCrd(ctx context.Context, crd crd.Crd, apiexts apiexts.Interface) error {
registry := getRegistry()
if err := registry.addCrd(crd); err != nil {
// If we fail to add a CRD, continue
contextutils.LoggerFrom(ctx).Warnf("Failed to add CRD %v: %v", crd, err)
return nil
}
if err := registry.registerCrd(ctx, crd.GroupVersionKind(), apiexts); err != nil {
return err
}
if err := kubeutils.WaitForCrdActive(ctx, apiexts, crd.FullName()); err != nil {
return err
}
return nil
}
func (r *crdRegistry) addCrd(resource crd.Crd) error {
r.mu.Lock()
defer r.mu.Unlock()
for i, crd := range r.crds {
if crd.GroupKind() == resource.GroupKind() {
for _, version := range crd.Versions {
if version.Version == resource.Version.Version {
return VersionExistsError(resource.GroupKind(), resource.Version.Version)
}
}
r.crds[i].Versions = append(crd.Versions, resource.Version)
return nil
}
}
r.crds = append(r.crds, crd.MultiVersionCrd{
Versions: []crd.Version{resource.Version},
CrdMeta: resource.CrdMeta,
})
return nil
}
func (r *crdRegistry) getCrd(gvk schema.GroupVersionKind) (crd.Crd, error) {
r.mu.RLock()
defer r.mu.RUnlock()
combined, err := r.getMultiVersionCrd(gvk.GroupKind())
if err != nil {
return crd.Crd{}, err
}
for _, version := range combined.Versions {
if version.Version == gvk.Version {
return crd.Crd{
CrdMeta: combined.CrdMeta,
Version: version,
}, nil
}
}
return crd.Crd{}, NotFoundError(gvk.String())
}
func (r *crdRegistry) getMultiVersionCrd(gk schema.GroupKind) (crd.MultiVersionCrd, error) {
r.mu.RLock()
defer r.mu.RUnlock()
for _, crd := range r.crds {
if crd.GroupKind() == gk {
return crd, nil
}
}
return crd.MultiVersionCrd{}, NotFoundError(gk.String())
}
func (r *crdRegistry) registerCrd(ctx context.Context, gvk schema.GroupVersionKind, clientset apiexts.Interface) error {
r.mu.RLock()
defer r.mu.RUnlock()
crd, err := r.getMultiVersionCrd(gvk.GroupKind())
if err != nil {
return err
}
toRegister, err := r.getKubeCrd(crd, gvk)
if err != nil {
return err
}
_, err = clientset.ApiextensionsV1().CustomResourceDefinitions().Create(context.TODO(), toRegister, metav1.CreateOptions{})
if err != nil && !apierrors.IsAlreadyExists(err) {
return fmt.Errorf("failed to register crd: %v", err)
}
return kubeutils.WaitForCrdActive(ctx, clientset, toRegister.Name)
}
func (r *crdRegistry) getKubeCrd(crd crd.MultiVersionCrd, gvk schema.GroupVersionKind) (*v1.CustomResourceDefinition, error) {
scope := v1.NamespaceScoped
if crd.ClusterScoped {
scope = v1.ClusterScoped
}
versions := make([]v1.CustomResourceDefinitionVersion, len(crd.Versions))
validGvk := false
for i, version := range crd.Versions {
versionToAdd := v1.CustomResourceDefinitionVersion{
Name: version.Version,
Schema: &v1.CustomResourceValidation{
OpenAPIV3Schema: &v1.JSONSchemaProps{
Type: "object",
XPreserveUnknownFields: pointer.BoolPtr(true),
},
},
}
if gvk.Version == version.Version {
versionToAdd.Served = true
versionToAdd.Storage = true
validGvk = true
}
versions[i] = versionToAdd
}
if !validGvk {
return nil, InvalidGVKError(gvk)
}
// Kubernetes expects Version to match the name of the first element specified in the Versions list.
// Sort so the first version in the list will also be the latest.
sort.Slice(versions, func(i, j int) bool {
parsedi, err := kubeapi.ParseVersion(versions[i].Name)
if err != nil {
return false
}
parsedj, err := kubeapi.ParseVersion(versions[j].Name)
if err != nil {
return false
}
return parsedi.GreaterThan(parsedj)
})
return &v1.CustomResourceDefinition{
ObjectMeta: metav1.ObjectMeta{Name: crd.FullName()},
Spec: v1.CustomResourceDefinitionSpec{
Group: crd.Group,
Scope: scope,
Names: v1.CustomResourceDefinitionNames{
Plural: crd.Plural,
Kind: crd.KindName,
ShortNames: []string{crd.ShortName},
},
Versions: versions,
},
}, nil
}