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Original file line number | Diff line number | Diff line change |
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package kopper | ||
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import ( | ||
"context" | ||
"fmt" | ||
"time" | ||
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"github.com/flanksource/commons/logger" | ||
"k8s.io/apimachinery/pkg/api/errors" | ||
"k8s.io/apimachinery/pkg/runtime" | ||
ctrl "sigs.k8s.io/controller-runtime" | ||
"sigs.k8s.io/controller-runtime/pkg/client" | ||
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | ||
) | ||
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func SetupReconciler[T any, PT interface { | ||
*T | ||
client.Object | ||
}](mgr ctrl.Manager, OnUpsertFunc func(PT) error, OnDeleteFunc func(string) error, finalizer string) error { | ||
if finalizer == "" { | ||
return fmt.Errorf("field Finalizer cannot be empty") | ||
} | ||
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r := Reconciler[T, PT]{ | ||
Client: mgr.GetClient(), | ||
Scheme: mgr.GetScheme(), | ||
OnUpsertFunc: OnUpsertFunc, | ||
OnDeleteFunc: OnDeleteFunc, | ||
Finalizer: finalizer, | ||
} | ||
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return r.SetupWithManager(mgr) | ||
} | ||
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type Reconciler[T any, PT interface { | ||
*T | ||
client.Object | ||
}] struct { | ||
client.Client | ||
Scheme *runtime.Scheme | ||
OnUpsertFunc func(PT) error | ||
OnDeleteFunc func(string) error | ||
Finalizer string | ||
} | ||
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func (r *Reconciler[T, PT]) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
obj := PT(new(T)) | ||
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err := r.Get(ctx, req.NamespacedName, obj) | ||
if err != nil { | ||
if errors.IsNotFound(err) { | ||
return ctrl.Result{}, nil | ||
} | ||
return ctrl.Result{}, err | ||
} | ||
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resourceName := fmt.Sprintf("%s[%s]", obj.GetObjectKind().GroupVersionKind().Kind, obj.GetUID()) | ||
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if !obj.GetDeletionTimestamp().IsZero() { | ||
logger.Infof("[kopper] deleting %s", resourceName) | ||
if err := r.OnDeleteFunc(string(obj.GetUID())); err != nil { | ||
logger.Errorf("[kopper] failed to delete %s: %v", resourceName, err) | ||
return ctrl.Result{Requeue: true, RequeueAfter: 2 * time.Minute}, err | ||
} | ||
controllerutil.RemoveFinalizer(obj, r.Finalizer) | ||
return ctrl.Result{}, r.Update(ctx, obj) | ||
} | ||
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if !controllerutil.ContainsFinalizer(obj, r.Finalizer) { | ||
controllerutil.AddFinalizer(obj, r.Finalizer) | ||
if err := r.Update(ctx, obj); err != nil { | ||
logger.Errorf("[kopper] failed to update finalizers %s: %v", resourceName, err) | ||
return ctrl.Result{Requeue: true, RequeueAfter: 2 * time.Minute}, err | ||
} | ||
} | ||
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if err := r.OnUpsertFunc(obj); err != nil { | ||
logger.Errorf("[kopper] failed to upsert %s: %v", resourceName, err) | ||
return ctrl.Result{Requeue: true, RequeueAfter: 2 * time.Minute}, err | ||
} | ||
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logger.Infof("[kopper] upserted %s", resourceName) | ||
return ctrl.Result{}, nil | ||
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} | ||
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// SetupWithManager sets up the controller with the Manager. | ||
func (r *Reconciler[T, PT]) SetupWithManager(mgr ctrl.Manager) error { | ||
pObj := PT(new(T)) | ||
return ctrl.NewControllerManagedBy(mgr). | ||
For(pObj). | ||
Complete(r) | ||
} |