K
Q

Istio upgrade from 1.4 to 1.5

8/4/2020

We have installed istion-1.4.0 from istio-demo.yml file by running the following command on k8s cluster - 1.15.1

kubectl apply -f istio-demo.yml

Now we need to upgrade our istio from 1.4.0 to 1.5.0 and as per my understanding its not straight forward, due to changes in istio components ( introducing of istiod and removing citadel,galley,policy & telemetry).

<Edit>

How can i move from kubectl to istoctl so that my future upgrade to istio in-line with.??

-- Ankit Saxena
istio
kubernetes

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1 Answer

8/11/2020

As I mentioned in comments I have followed a theme on istio discuss about upgrade created by@laurentiuspurba.

I have changed it a little for your use case, so an upgrade from 1.4 to 1.5.

Take a look at below steps to follow.

1.Follow istio documentation and install istioctl 1.4 and 1.5 with:

curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.4.0 sh -
curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.5.0 sh -

2.Add the istioctl 1.4 to your path

cd istio-1.4.0
export PATH=$PWD/bin:$PATH

3.Install istio 1.4

istioctl manifest generate > $HOME/generated-manifest.yaml
kubectl create namespace istio-system
kubectl apply -f generated-manifest.yaml

4.Check if everything works correct.

kubectl get pod -n istio-system
kubectl get svc -n istio-system
istioctl version

5.Add the istioctl 1.5 to your path

cd istio-1.5.0
export PATH=$PWD/bin:$PATH

6.Install istio operator for future upgrade.

istioctl operator init

7.Prepare IstioOperator.yaml

nano IstioOperator.yaml
apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  namespace: istio-system
  name: example-istiocontrolplane
spec:
  profile: default
  tag: 1.5.0

8.Before the upgrade use below commands

kubectl -n istio-system delete service/istio-galley deployment.apps/istio-galley
kubectl delete validatingwebhookconfiguration.admissionregistration.k8s.io/istio-galley

9.Upgrade from 1.4 to 1.5 with istioctl upgrade and prepared IstioOperator.yaml

istioctl upgrade -f IstioOperator.yaml

10.After the upgrade use below commands

kubectl -n istio-system delete deployment istio-citadel istio-galley istio-pilot istio-policy istio-sidecar-injector istio-telemetry
kubectl -n istio-system delete service istio-citadel istio-policy istio-sidecar-injector istio-telemetry
kubectl -n istio-system delete horizontalpodautoscaler.autoscaling/istio-pilot horizontalpodautoscaler.autoscaling/istio-telemetry
kubectl -n istio-system delete pdb istio-citadel istio-galley istio-pilot istio-policy istio-sidecar-injector istio-telemetry
kubectl -n istio-system delete deployment istiocoredns
kubectl -n istio-system delete service istiocoredns

11.Check if everything works correct.

kubectl get pod -n istio-system
kubectl get svc -n istio-system
istioctl version

12.I have deployed a bookinfo app to check if everything work correct.

kubectl label namespace default istio-injection=enabled
kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml
kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml

13.Results

curl -v xx.xx.xxx.xxx/productpage | grep HTTP
HTTP/1.1 200 OK


istioctl version
client version: 1.5.0
control plane version: 1.5.0
data plane version: 1.5.0 (8 proxies)

Hope you find this useful. If you have any questions let me know.

-- Jakub
Source: StackOverflow