[k8sclusterreceiver] Add hierarchical-resource-quota

[hiwayama]

Component(s)

receiver/k8scluster

Is your feature request related to a problem? Please describe.

We use hierarchical-namespaces and hierarchical-resource-quota.
https://github.com/kubernetes-sigs/hierarchical-namespaces

I'd like to obtain the information of HierarchicalResourceQuota to observe the aggregated resource limit amount for each parent namespace.

spec: https://github.com/kubernetes-sigs/hierarchical-namespaces/blob/master/api/v1alpha2/hierarchicalresourcequota_types.go#L59-L67

Describe the solution you'd like

While it is possible to perform a similar operation by retrieving and aggregating all the values of ResourceQuota when querying the values collected by k8sreceiver, it would be appreciated if the k8sclusterreceiver could handle HierarchicalResourceQuota in the same way as ResourceQuota, considering the need to be aware of parent-child relationships in the namespace.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• k8sclusterreceiver: @dmitryax @TylerHelmuth @povilasv
• receiver/k8scluster: @dmitryax @TylerHelmuth @povilasv

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[hiwayama]

@dmitryax @TylerHelmuth @povilasv

Can you assign me to implement this feature?
I would like to contribute to this project.

[hiwayama]

Thank you very much.
I started designing it immediately, but I have a question about how to implement it.

The custom controller for HierachilalResourceQuota does not use client-go and there is no Informer.
ref: https://github.com/kubernetes-sigs/hierarchical-namespaces/blob/master/internal/hrq/hrqreconciler.go

I thought about using dynamicinformer, and I'll create new factory to wrap dynamicinformer.DynamicSharedInformerFactory.

type dynamicSharedInformerFactory struct {
	dynamicinformer.DynamicSharedInformerFactory
}

func (df *dynamicSharedInformerFactory) Start(channel <-chan struct{}) {
	df.DynamicSharedInformerFactory.Start(channel)
}

var gvr = schema.GroupVersionResource{Group: "hnc.x-k8s.io", Version: "v1alpha2", Resource: "HierarchicalResourceQuota"}

func (df *dynamicSharedInformerFactory) WaitForCacheSync(channel <-chan struct{}) map[reflect.Type]bool {
	cache := df.DynamicSharedInformerFactory.WaitForCacheSync(channel)
	return map[reflect.Type]bool{
		reflect.TypeOf(&v1alpha2.HierarchicalResourceQuota{}): cache[gvr],
	}
}

Do you have better implementation ideas?

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• receiver/k8scluster: @dmitryax @TylerHelmuth @povilasv

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

This issue has been closed as inactive because it has been stale for 120 days with no activity.