ClusterResourceSet feature does not work

[gyliu513]

What steps did you take and what happened:
[A clear and concise description on how to REPRODUCE the bug.]

Please refer to kubernetes-retired/cluster-api-provider-nested#155 for detail.

Follow the proposal guides:

• https://github.com/kubernetes-sigs/cluster-api/blob/master/docs/proposals/20200220-cluster-resource-set.md
• https://cluster-api.sigs.k8s.io/tasks/experimental-features/experimental-features.html?highlight=ClusterResourceSet#enabling-experimental-features-on-existing-management-clusters

1. Deploy two nested clusters in Kind
2. Enable ClusterResourceSet feature
3. Create secret and configmap by the samples from 20200220-cluster-resource-set.md
4. Create ClusterResourceSet by the sample from 20200220-cluster-resource-set.md
   The following problem appears, but the two apiservers are running normally by kubectl command.

E0702 09:08:52.250697       1 controller.go:302] controller-runtime/manager/controller/clusterresourceset "msg"="Reconciler error"
 "error"="error creating client and cache for remote cluster: error creating dynamic rest mapper for remote cluster \"default/cluster-sample\":
 Get \"https://cluster-sample-apiserver:6443/api?timeout=10s\": dial tcp: lookup cluster-sample-apiserver on 10.96.0.10:53: server misbehaving"
  "name"="crs1" "namespace"="default" "reconciler group"="addons.cluster.x-k8s.io" "reconciler kind"="ClusterResourceSet"
E0702 09:07:16.064594       1 controller.go:302] controller-runtime/manager/controller/clusterresourceset "msg"="Reconciler error"
 "error"="error creating client and cache for remote cluster: error creating dynamic rest mapper for remote cluster \"default/cluster-virtual\":
 Get \"https://cluster-virtual-apiserver:6443/api?timeout=10s\": dial tcp: lookup cluster-virtual-apiserver on 10.96.0.10:53: server misbehaving"
 "name"="crs1" "namespace"="default" "reconciler group"="addons.cluster.x-k8s.io" "reconciler kind"="ClusterResourceSet"

What did you expect to happen:

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Cluster-api version:
• Minikube/KIND version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

/kind bug
[One or more /area label. See https://github.com/kubernetes-sigs/cluster-api/labels?q=area for the list of labels]

[vincepri]

The errors seem to hint to a network issue, which isn't necessarily related to ClusterResourceSet

[vincepri]

/milestone Next
/priority awaiting-more-evidence

[randomvariable]

dial tcp: lookup cluster-sample-apiserver on 10.96.0.10:53: server misbehaving

suggests DNS resolution failure. cluster-sample-apiserver needs to be resolvable from the various pods.

[gyliu513]

Thanks @randomvariable and @vincepri , let me retest.

@wangjsty ^^

[vincepri]

Closing this due to lack of updates, please feel free to reopen if you have more details

/close

[k8s-ci-robot]

@vincepri: Closing this issue.

In response to this:

Closing this due to lack of updates, please feel free to reopen if you have more details

/close

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