custom-gateways-upgrade-test.sh

# Start clean
istioctl x uninstall --purge -y
sleep 20s
kubectl delete namespace custom-gateways
sleep 30s

# Download Istio 1.8.2
curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.8.2 sh -
cd istio-1.8.2

# Install Istio 1.8.1 Opeartor
./bin/istioctl operator init --tag 1.8.1
sleep 20s

# Install Istio 1.8.1
kubectl create ns istio-system
kubectl apply -f - <<EOF
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  namespace: istio-system
  name: example-istiocontrolplane
spec:
  profile: default
EOF
sleep 60s

# Check that istiod and default gateway is at 1.8.1
kubectl get pods -n istio-system  -o jsonpath="{.items[*].spec.containers[*].image}"

# Install additinal 1.8.1 gateway in new namespace
kubectl create namespace custom-gateways
kubectl apply -f - <<EOF
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  name: custom-ingressgateway-iop
  namespace: istio-system
spec:
  profile: empty
  tag: 1.8.1 # NOTE!
  components:
    ingressGateways:
      - name: custom-ingressgateway
        label: 
          istio: custom-ingressgateway
        namespace: custom-gateways
        enabled: true
EOF
sleep 30s

# Check to see if 1.8.1 gateway is installed
kubectl get pods -n custom-gateways  -o jsonpath="{.items[*].spec.containers[*].image}"

## TEST THAT CUSTOM GATEWAY IS WORKING BY SENDING TRAFFIC
## ...

# Update Istio operator to 1.8.2
./bin/istioctl operator init --tag 1.8.2
sleep 60s

# Check that istiod and default gateway is updated to 1.8.2
kubectl get pods -n istio-system  -o jsonpath="{.items[*].spec.containers[*].image}"

# Check that custom gateway is still to 1.8.1
kubectl get pods -n custom-gateways  -o jsonpath="{.items[*].spec.containers[*].image}"

## TEST THAT CUSTOM GATEWAY 1.8.1 IS WORKING BY SENDING TRAFFIC
## ...

# Update custom gateway to 1.8.2
kubectl apply -f - <<EOF
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  name: custom-ingressgateway-iop
  namespace: istio-system
spec:
  profile: empty
  tag: 1.8.2 # NOTE!
  components:
    ingressGateways:
      - name: custom-ingressgateway
        label: 
          istio: custom-ingressgateway
        namespace: custom-gateways
        enabled: true
EOF

# Check that custom gateway is upgraded to 1.8.2
kubectl get pods -n custom-gateways  -o jsonpath="{.items[*].spec.containers[*].image}"

## TEST THAT CUSTOM GATEWAY 1.8.2 IS WORKING BY SENDING TRAFFIC
## ...