salrashid123

$ kubectl get po,deployments,svc,ing 
NAME                           READY     STATUS    RESTARTS   AGE
po/be-v1-16151855-4vsz5        2/2       Running   0          25s
po/be-v1-16151855-cxvxw        2/2       Running   0          25s
po/myapp-v1-2518991625-3z1pv   2/2       Running   0          25s
po/myapp-v1-2518991625-crc7s   2/2       Running   0          25s
NAME              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/be-v1      2         2         2            2           25s
deploy/be-v2      0         0         0            0           25s
deploy/myapp-v1   2         2         2            2           25s

salrashid123

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: gateway
  annotations:
    kubernetes.io/ingress.class: "istio"
    kubernetes.io/ingress.allowHTTP: "false"
spec:
  tls:
  - secretName: istio-ingress-certs

salrashid123

apiVersion: v1
kind: Service
metadata:
  name: myapp-srv
  labels:
    app: myapp
spec:
  ports:
  - port: 8080
    name: http

salrashid123

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: myapp-v1
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: myapp

salrashid123

$ kubectl get po,deployments,svc,ing 
NAME                           READY     STATUS    RESTARTS   AGE
po/be-v1-16151855-7lfrd        2/2       Running   0          33m
po/be-v1-16151855-z50n2        2/2       Running   0          33m
po/myapp-v1-2518991625-frfd9   2/2       Running   0          33m
po/myapp-v1-2518991625-vhh6x   2/2       Running   0          33m
NAME              DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deploy/be-v1      2         2         2            2           33m
deploy/be-v2      0         0         0            0           33m
deploy/myapp-v1   2         2         2            2           33m

salrashid123

apiVersion: config.istio.io/v1alpha2
kind: RouteRule
metadata:
  name: fe-v1-be-v2
spec:
  precedence: 1
  match:
    source:
      name: myapp
      labels:

salrashid123

$ curl -k https://$GATEWAY_IP/hostz

[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb

salrashid123

$ curl -k https://$GATEWAY_IP/hostz
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v1-16151855-3vs67]    node: [gke-cluster-1-default-pool-94718a04-cphx]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v1-16151855-3vs67]    node: [gke-cluster-1-default-pool-94718a04-cphx]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v2-4191276971-rqv5q]    node: [gke-cluster-1-default-pool-94718a04-lrb5]","statusCode":200}]
[{"url":"http://be.default.svc.cluster.local:8080/backend","body":"pod: [be-v1-16151855-3vs67]    node: [gke-cluster-1-default-pool-94718a04-cphx]","statusCode":200}]

salrashid123

---
apiVersion: config.istio.io/v1alpha2
kind: RouteRule
metadata:
  name: myapp-v1-path
spec:
  precedence: 1
  destination:
    name: myapp
  match:

salrashid123

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: myapp-v2
spec:
  replicas: 0
  template:
    metadata:
      labels:
        app: myapp