Using Istio with Kubernetes and facing an issue with a simple routerule splitting traffic between two Deployments. Only one of the Deployment (howdy) is returning results correctly. The other Deployment (hello) is reporting "no healthy upstream".

Here is the k8s manifest:

apiVersion: v1
kind: Service
metadata:
  name: greeting
  labels:
    name: greeting
spec:
  selector:
    app: greeting
  ports:
  - name: http
    protocol: TCP
    port: 8081
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: greeting-hello
  labels:
    name: greeting-hello
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: greeting
        greeting: hello
    spec:
      containers:
      - name: greeting
        image: arungupta/greeting:hello
        imagePullPolicy: Always
        ports:
        - containerPort: 8081
        readinessProbe:
          httpGet:
            path: /resources/greeting
            port: 8081
          initialDelaySeconds: 50
          periodSeconds: 5
--- apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: greeting-howdy
  labels:
    name: greeting-howdy
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: greeting
        greeting: howdy
    spec:
      containers:
      - name: greeting
        image: arungupta/greeting:howdy
        imagePullPolicy: Always
        ports:
        - containerPort: 8081
        readinessProbe:
          httpGet:
            path: /resources/greeting
            port: 8081
          initialDelaySeconds: 50
          periodSeconds: 5

And the route is:

apiVersion: config.istio.io/v1alpha2
kind: RouteRule
metadata:
  name: greeting-50-50
spec:
  destination:
    name: greeting
  route:
  - labels:
      app: greeting
      greeting: hello
    weight: 100
  - labels:
      app: greeting
      greeting: howdy
    weight: 0

Any idea?

This is also tracked at https://github.com/aws-samples/aws-microservices-deploy-options/issues/239