AddEventHandler return type error

[VincentYuan-hub]

root/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/cache/multi_namespace_cache.go:308:9: cannot use handles (variable of type map[string]"k8s.io/client-go/tools/cache".ResourceEventHandlerRegistration) as type "k8s.io/client-go/tools/cache".ResourceEventHandlerRegistration in return statement:
        map[string]"k8s.io/client-go/tools/cache".ResourceEventHandlerRegistration does not implement "k8s.io/client-go/tools/cache".ResourceEventHandlerRegistration (missing HasSynced method)

I check the code , It feels like a mistake

func (i *multiNamespaceInformer) AddEventHandler(handler toolscache.ResourceEventHandler) (toolscache.ResourceEventHandlerRegistration, error) {
	handles := make(map[string]toolscache.ResourceEventHandlerRegistration, len(i.namespaceToInformer))
	for ns, informer := range i.namespaceToInformer {
		registration, err := informer.AddEventHandler(handler)
		if err != nil {
			return nil, err
		}
		handles[ns] = registration
	}
	return handles, nil
}

[sbueringer]

Which versions of controller-runtime and client-go are you using?

[VincentYuan-hub]

您使用的是哪个版本的 controller-runtime 和 client-go？

k8s.io/client-go v0.26.3
sigs.k8s.io/controller-runtime v0.14.6

I feel this error is reasonable. it declare to return toolscache.ResourceEventHandlerRegistration, but return map[string]toolscache.ResourceEventHandlerRegistration

[sbueringer]

ResourceEventHandlerRegistration doesn't have a HasSynced func in client-go v0.26.3

https://github.com/kubernetes/client-go/blob/v0.26.3/tools/cache/shared_informer.go#L213-L216

This was introduced in v0.27.x

https://github.com/kubernetes/client-go/blob/v0.27.1/tools/cache/shared_informer.go#L217-L227

Based on that I assume that somehow client-go v0.27 is used

[VincentYuan-hub]

Thank you for response. I had checked . it used v0.27.x

[pixelsoccupied]

Hi there, ran into the same issue. In my case i used the latest client-go and controller controller-runtime

k8s.io/client-go v0.27.1
sigs.k8s.io/controller-runtime v0.14.6

Potential fix of pinning everything to v0.26.4 did the trick trick for now.

replace (
	k8s.io/api => k8s.io/api v0.26.4
	k8s.io/apimachinery => k8s.io/apimachinery v0.26.4
	k8s.io/client-go => k8s.io/client-go v0.26.4
	sigs.k8s.io/controller-runtime => sigs.k8s.io/controller-runtime v0.14.6
)

operator-framework/operator-sdk#6396

[sbueringer]

Not sure why those replace statements are needed, that's probably specific to your case.

We are just having them as normal dependencies (https://github.com/kubernetes-sigs/cluster-api/blob/main/go.mod#L35-L45) and go mod tidy etc. don' try to bump

[benjibc]

Thanks @sbueringer ! Do you want to consider supporting k8s.io/client-go v0.27.x going forward? Otherwise I will always be stuck on this version for k8s api if I was to include this library in my project.

[sbueringer]

The main branch already supports it. Next release is currently planned for next week.

In general we create corresponding CR releases after Kubernetes releases. This time we had to wait for a fix in 0.27.2

[spolti]

@sbueringer it still happening on 0.27.6.

[sbueringer]

Without more context it's had to tell what is going wrong.

What I can do is provide an example. In Cluster API v1.5.x we use controller-runtime v0.15.3 with client-go v0.27.7 without any issues.

To be clear. At the time we were only waiting for v0.27.2 to release controller-runtime v0.15.0.

v0.27.2 wasn't supposed to (and didn't) make client-go compatible with controller-runtime v0.14.x.