istioupgradetest-managed.sh

export CLUSTER=istio6


echo "Install Istio 1.4"
curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.4.5 sh -
cd istio-1.4.5
ibmcloud ks cluster addon enable istio -c $CLUSTER
kubectl label namespace default istio-injection=enabled

sleep 120s

kubectl get pods -n istio-system

read -p "Press enter to continue"

echo "Install BookInfo"
kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml

sleep 15s

export INGRESS_HOST=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].port}')
export SECURE_INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="https")].port}')

echo http://$INGRESS_HOST/productpage

while true; do sleep 1; curl -s -o /dev/null -w "%{http_code}\n"  http://$INGRESS_HOST/productpage;done &

read -p "Press enter to continue"

cd ..
echo "Upgrade to Istio 1.5"


curl -L https://istio.io/downloadIstio | sh -
cd istio-1.5.0
ibmcloud ks cluster addon update istio --version 1.5 -c $CLUSTER
sleep 120s
kubectl get pods -n istio-system

echo http://$INGRESS_HOST/productpage

# curl http://$INGRESS_HOST/productpage | grep Simple


# CLEANUP
read -p "Clean up?"
ibmcloud ks cluster addon disable istio -c $CLUSTER -f
./samples/bookinfo/platform/kube/cleanup.sh

cd ..
rm -rf istio-1.4.5/ 
rm -rf istio-1.5.0/

Slightly modified version here -> https://gist.github.com/jpapejr/d44dc83864b94214d01b7d8bff4f6e33