Rancher web interface complains "waiting for cluster agent to connect" when installing first node

Rancher
1

I am provisioning an rke2 cluster and rancher complains when installing the first node about:

waiting for cluster agent to connect
rke version is v1.24.13+rke2r1

Which agent is failing and how can I troubleshoot this?

2

Have you solved this problem

3

At this point the cluster might be ready as standalone but not active on Rancher Manager. If you have SSH access to the nodes, export the KUBECONFIG=/etc/rancher/rke2/rke2.yaml and get the cattle-cluster-agent pods in the cattle-system namespace. Describe the pod or check the pod logs to troubleshoot why the pod is not able to connect to Rancher.

I faced this issue once, in my case the cattle-cluster-agent pod was not able to resolve my Rancher FQDN. After restarting my coredns deployment the issue got resolved.