Registered Clusters

The commands/steps listed on this page can be used to check clusters that you are registering or that are registered in Rancher.

Make sure you configured the correct kubeconfig (for example, export KUBECONFIG=$PWD/kubeconfig_from_imported_cluster.yml)

Rancher agents

Communication to the cluster (Kubernetes API via cattle-cluster-agent) and communication to the nodes is done through Rancher agents.

If the cattle-cluster-agent cannot connect to the configured server-url, the cluster will remain in Pending state, showing Waiting for full cluster configuration.

cattle-node-agent

Registered Clusters - 图1note

cattle-node-agents are only present in clusters created in Rancher with RKE.

Check if the cattle-node-agent pods are present on each node, have status Running and don’t have a high count of Restarts:

  1. kubectl -n cattle-system get pods -l app=cattle-agent -o wide

Example output:

  1. NAME                      READY     STATUS    RESTARTS   AGE       IP                NODE
  2. cattle-node-agent-4gc2p   1/1       Running   0          2h        x.x.x.x           worker-1
  3. cattle-node-agent-8cxkk   1/1       Running   0          2h        x.x.x.x           etcd-1
  4. cattle-node-agent-kzrlg   1/1       Running   0          2h        x.x.x.x           etcd-0
  5. cattle-node-agent-nclz9   1/1       Running   0          2h        x.x.x.x           controlplane-0
  6. cattle-node-agent-pwxp7   1/1       Running   0          2h        x.x.x.x           worker-0
  7. cattle-node-agent-t5484   1/1       Running   0          2h        x.x.x.x           controlplane-1
  8. cattle-node-agent-t8mtz   1/1       Running   0          2h        x.x.x.x           etcd-2

Check logging of a specific cattle-node-agent pod or all cattle-node-agent pods:

  1. kubectl -n cattle-system logs -l app=cattle-agent

cattle-cluster-agent

Check if the cattle-cluster-agent pod is present in the cluster, has status Running and doesn’t have a high count of Restarts:

  1. kubectl -n cattle-system get pods -l app=cattle-cluster-agent -o wide

Example output:

  1. NAME                                    READY     STATUS    RESTARTS   AGE       IP           NODE
  2. cattle-cluster-agent-54d7c6c54d-ht9h4   1/1       Running   0          2h        x.x.x.x      worker-1

Check logging of cattle-cluster-agent pod:

  1. kubectl -n cattle-system logs -l app=cattle-cluster-agent