Deciding which metrics to use is done by using
MetricSpecs, which are a key part of HPAs, and look like this:
To send these specs to the Predictive HPA, add a config option called
metrics to the PHPA, with a multiline string
containing the metric list. For example:
This allows porting over existing Kubernetes HPA metric configurations to the Predictive Horizontal Pod Autoscaler. Equivalent to K8s HPA metric specs; which are demonstrated in this HPA walkthrough. Can hold multiple values as it is an array.