kuberneteskubernetes-operatorkubebuilder

Kubebuilder predicates to skip certain namespaces

I'm using the kubebuilder framework in my controller and I want to completely ignore events from a list of given system namespaces. I think predicates must be the best option for this, hence I have the following code

...

WithEventFilter(predicate.Funcs{
            GenericFunc: func(e event.GenericEvent) bool {
                namespace := e.Object.GetNamespace()
                if _, ok := systemNs[namespace]; ok {
                    // ignore events from system namespaces
                    return false
                }

                return true
            },
}).

However I still receive events from all namespaces instead of just the ones which I allow. Is this a correct and valid use case of predicates?

Solution

  • NewPredicateFuncs apply the filter on all events:

    WithEventFilter(predicate.NewPredicateFuncs(func(obj client.Object) bool {
    _, ok := systemNs[obj.GetNamespace()]
    return !ok
})).