Kubernetes rejects minReplicas=0 unless at least one Object or
External metric is configured. With only a Resource (CPU) metric,
the HPA is invalid:
HorizontalPodAutoscaler.autoscaling "neuron-marketing-hpa"
is invalid: [spec.minReplicas: Invalid value: 0: must be greater
than or equal to 1, spec.metrics: Forbidden: must specify at
least one Object or External metric to support scaling to zero
replicas]
This was blocking the entire neuron-prod Argo CD sync — every
manifest in the directory had to be applied individually after
this single resource caused the multi-resource patch to fail.
The dharma NetworkPolicy applied today only because Argo retried
individually after the failure.
The file header already states "minReplicas=1 prevents unnecessary
idle waste" as the intent for this single-Legion-node period;
this brings the marketing HPA into line with the other two.
Will Anderson
81c301f013