monitoring

CnaoDown

Meaning

This alert fires when the Cluster Network Addons Operator (CNAO) is down. The CNAO deploys additional networking components on top of the cluster.

Impact

If the CNAO is not running, the cluster cannot reconcile changes to virtual machine components. As a result, the changes might fail to take effect.

Diagnosis

  1. Set the NAMESPACE environment variable:

    $ export NAMESPACE="$(kubectl get deployment -A | grep cluster-network-addons-operator | awk '{print $1}')"

  2. Check the status of the cluster-network-addons-operator pod:

    $ kubectl -n $NAMESPACE get pods -l name=cluster-network-addons-operator

  3. Check the cluster-network-addons-operator logs for error messages:

    $ kubectl -n $NAMESPACE logs -l name=cluster-network-addons-operator

  4. Obtain the details of the cluster-network-addons-operator pods:

    $ kubectl -n $NAMESPACE describe pods -l name=cluster-network-addons-operator

Mitigation

If you cannot resolve the issue, see the following resources: