I need to provide a list of hostnames under kubernetes.io/hostname nodeSelector. I tried giving comma separated list but kubernetes throws some validation error when I do kubectl apply -f <yaml file>.

I also tried giving multiple hostnames by providing repeated sets of kubernetes.io/hostname , but kubernetes takes only the last value. Could not find any valid example when I browsed.

Thanks

The DaemonSet "ssh-daemonset" is invalid: spec.template.spec.nodeSelector: Invalid value: "1z.t3.x52.y7,l0.1k7.1p0.2q0": a valid label must be an empty string or consist of alphanumeric characters, '-', '_' or '.', and must start and end with an alphanumeric character (e.g. 'MyValue',  or 'my_value',  or '12345', regex used for validation is '(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?')