Service of type LoadBalancer IP Address will change after AKS Upgrade(yes/no)

Question:- Somebody asked, whether the service of type loadbalancer IPAddress will change when we upgrade AKS Cluster

Ans : No. 

Demo here.. 

C:\Users\kusha>kubectl get services -n rak

NAME                         TYPE           CLUSTER-IP     EXTERNAL-IP      PORT(S)        AGE

webserver-service            LoadBalancer   10.0.217.211   20.242.248.124   80:30326/TCP   34m

webserver-service--persist   LoadBalancer   10.0.202.73    20.120.120.54    80:30085/TCP   21m

az aks show --resource-group RGP-USE-AKS-DV  --name AKS-USE-AKS-DEV  --query "kubernetesVersion" --output table

Result

--------

1.24.9

az aks upgrade --resource-group RGP-USE-AKS-DV --name AKS-USE-AKS-DEV --kubernetes-version 1.25.5

C:\Users\kusha>az aks show --resource-group RGP-USE-AKS-DV  --name AKS-USE-AKS-DEV  --query "kubernetesVersion" --output table

Result

--------

1.25.5

C:\Users\kusha>kubectl get services -n rak

NAME                         TYPE           CLUSTER-IP     EXTERNAL-IP      PORT(S)        AGE

webserver-service            LoadBalancer   10.0.217.211   20.242.248.124   80:30326/TCP   60m

webserver-service--persist   LoadBalancer   10.0.202.73    20.120.120.54    80:30085/TCP   47m

LoadBalacer IP address remains unchanged.