envoy sidecar errors when a service maps 2 service ports to the same container port

deploy.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: twosvcports
  labels:
    istio-injection: enabled
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: twosvcports
  namespace: twosvcports
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: twosvcports
  namespace: twosvcports
  labels:
    app: twosvcports
spec:
  selector:
    matchLabels:
      app: twosvcports
  template:
    metadata:
      labels:
        app: twosvcports
    spec:
      serviceAccountName: twosvcports
      containers:
        - name: twosvcports
          image: gotwarlost/istio-test:latest
          ports:
            - containerPort: 8080
              name: http
              protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: multiport
  namespace: twosvcports
  labels:
    app: multi
spec:
  ports:
    - name: http-external
      port: 80
      targetPort: 8080
      protocol: TCP
    - name: http-internal
      port: 8080
      targetPort: 8080
      protocol: TCP
  selector:
    app: twosvcports

proxy-errors.md

$ kc logs twosvcports-79d97f79fb-94gvz -c istio-proxy
...
2019-05-05T20:16:00.929216Z	info	Envoy proxy is NOT ready: 2 errors occurred:

* failed checking application ports. listeners="0.0.0.0:15090"
* envoy missing listener for inbound application port: 8080