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source.go
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/
source.go
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// Copyright (c) Red Hat, Inc.
// Copyright Contributors to the Open Cluster Management project
package source
import (
"context"
"fmt"
"reflect"
klusterletconfigv1alpha1lister "github.com/stolostron/cluster-lifecycle-api/client/klusterletconfig/listers/klusterletconfig/v1alpha1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
corev1listers "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog/v2"
workv1lister "open-cluster-management.io/api/client/work/listers/work/v1"
workv1 "open-cluster-management.io/api/work/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
type InformerHolder struct {
ImportSecretInformer cache.SharedIndexInformer
ImportSecretLister corev1listers.SecretLister
AutoImportSecretInformer cache.SharedIndexInformer
AutoImportSecretLister corev1listers.SecretLister
KlusterletWorkInformer cache.SharedIndexInformer
KlusterletWorkLister workv1lister.ManifestWorkLister
HostedWorkInformer cache.SharedIndexInformer
HostedWorkLister workv1lister.ManifestWorkLister
KlusterletConfigLister klusterletconfigv1alpha1lister.KlusterletConfigLister
ManagedClusterInformer cache.SharedIndexInformer
}
// NewImportSecretSource return a source only for import secrets
func NewImportSecretSource(secretInformer cache.SharedIndexInformer) *Source {
return &Source{
informer: secretInformer,
expectedType: reflect.TypeOf(&corev1.Secret{}),
name: "import-secret",
}
}
// NewAutoImportSecretSource return a source only for auto import secrets
func NewAutoImportSecretSource(secretInformer cache.SharedIndexInformer) *Source {
return &Source{
informer: secretInformer,
expectedType: reflect.TypeOf(&corev1.Secret{}),
name: "auto-import-secret",
}
}
// NewKlusterletWorkSource return a source only for klusterlet manifest works
func NewKlusterletWorkSource(workInformer cache.SharedIndexInformer) *Source {
return &Source{
informer: workInformer,
expectedType: reflect.TypeOf(&workv1.ManifestWork{}),
name: "klusterlet-manifest-works",
}
}
// NewHostedWorkSource return a source only for hosted manifest works
func NewHostedWorkSource(workInformer cache.SharedIndexInformer) *Source {
return &Source{
informer: workInformer,
expectedType: reflect.TypeOf(&workv1.ManifestWork{}),
name: "hosted-manifest-works",
}
}
// NewManagedClusterSource return a source for managed cluster
func NewManagedClusterSource(mcInformer cache.SharedIndexInformer) *Source {
return &Source{
informer: mcInformer,
expectedType: reflect.TypeOf(&workv1.ManifestWork{}),
name: "managed-cluster",
}
}
// Source is the event source of specified objects
type Source struct {
informer cache.SharedIndexInformer
expectedType reflect.Type
name string
}
var _ source.SyncingSource = &Source{}
func (s *Source) Start(ctx context.Context, handler handler.EventHandler,
queue workqueue.RateLimitingInterface, predicates ...predicate.Predicate) error {
_, err := s.informer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
newObj, ok := obj.(client.Object)
if !ok {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", obj))
return
}
if objType := reflect.TypeOf(newObj); s.expectedType != objType {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", obj))
return
}
createEvent := event.CreateEvent{Object: newObj}
for _, p := range predicates {
if !p.Create(createEvent) {
return
}
}
handler.Create(ctx, createEvent, queue)
},
UpdateFunc: func(oldObj, newObj interface{}) {
oldClientObj, ok := oldObj.(client.Object)
if !ok {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", oldObj))
return
}
if objType := reflect.TypeOf(oldClientObj); s.expectedType != objType {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", oldObj))
return
}
newClientObj, ok := newObj.(client.Object)
if !ok {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", newObj))
return
}
if objType := reflect.TypeOf(newClientObj); s.expectedType != objType {
klog.Errorf(fmt.Sprintf("OnAdd missing Object, type %T", newObj))
return
}
updateEvent := event.UpdateEvent{ObjectOld: oldClientObj, ObjectNew: newClientObj}
for _, p := range predicates {
if !p.Update(updateEvent) {
return
}
}
handler.Update(ctx, updateEvent, queue)
},
DeleteFunc: func(obj interface{}) {
if _, ok := obj.(client.Object); !ok {
// If the object doesn't have Metadata, assume it is a tombstone object of type DeletedFinalStateUnknown
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
klog.Errorf(fmt.Sprintf("Error decoding objects. Expected cache.DeletedFinalStateUnknown, type %T", obj))
return
}
// Set obj to the tombstone obj
obj = tombstone.Obj
}
o, ok := obj.(client.Object)
if !ok {
klog.Errorf(fmt.Sprintf("OnDelete missing Object, type %T", obj))
return
}
deleteEvent := event.DeleteEvent{Object: o}
for _, p := range predicates {
if !p.Delete(deleteEvent) {
return
}
}
handler.Delete(ctx, deleteEvent, queue)
},
})
return err
}
func (s *Source) WaitForSync(ctx context.Context) error {
if ok := cache.WaitForCacheSync(ctx.Done(), s.informer.HasSynced); !ok {
return fmt.Errorf("never achieved initial sync")
}
return nil
}
func (s *Source) String() string {
return s.name
}
// Map a client object to reconcile request
type MapFunc func(client.Object) reconcile.Request
type ManagedClusterResourceEventHandler struct {
MapFunc
}
var _ handler.EventHandler = &ManagedClusterResourceEventHandler{}
func (e *ManagedClusterResourceEventHandler) Create(ctx context.Context, evt event.CreateEvent, q workqueue.RateLimitingInterface) {
e.add(evt.Object, q)
}
func (e *ManagedClusterResourceEventHandler) Update(ctx context.Context, evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
e.add(evt.ObjectNew, q)
}
func (e *ManagedClusterResourceEventHandler) Delete(ctx context.Context, evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
e.add(evt.Object, q)
}
func (e *ManagedClusterResourceEventHandler) Generic(ctx context.Context, evt event.GenericEvent, q workqueue.RateLimitingInterface) {
// do nothing
}
func (e *ManagedClusterResourceEventHandler) add(obj client.Object, q workqueue.RateLimitingInterface) {
request := reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: obj.GetNamespace(),
Name: obj.GetNamespace(),
},
}
if e.MapFunc != nil {
request = e.MapFunc(obj)
}
q.Add(request)
}