Returns nil if no quantities are passed in.

to be safe, k8s sometimes needs all characters to be lower case, and the first to be a letter.

ValidName ensures name contains only lower case alphanumeric, '-', or '.'.

ValidNameContainer ensures name contains only lower case alphanumeric or '-', must start with alphabetic, end with alphanumeric.

pod termination reasons https://github.com/kubernetes/kube-state-metrics/blob/master/docs/pod-metrics.md.

pod termination reasons https://github.com/kubernetes/kube-state-metrics/blob/master/docs/pod-metrics.md.

pod termination reasons https://github.com/kubernetes/kube-state-metrics/blob/master/docs/pod-metrics.md.