Kubernetes nodes and hosts are not connected correctly.
This could happen if every node in the cluster has an identical machineId, which should be a unique identifier for k8s nodes.
Kubernetes API does not provide the mac address. We have to use the machine-id. Furthermore, machine-id's are intended to be unique - not just for Instana, but for everything. Every host needs a unique machine-id in the same way that they need unique IP Addresses, mac addresses, etc. Please see:
We recommend that you fix your deployment scripts to generate unique machine-id's in order to resolve this issue.