Istio Ingress resulting in “no healthy upstream”

Although this is a somewhat general error resulting from a routing issue within an improper Istio setup, I will provide a general solution/piece of advice to anyone coming across the same issue.

In my case the issue was due to incorrect route rule configuration, the Kubernetes native services were functioning however the Istio routing rules were incorrectly configured so Istio could not route from the ingress into the service.

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