Hi Li, If you want to do what the blog suggests, you need to determine where the persistent volume is for the sas-pyconfig PVC.  In our lab machines, we use the NFS storage class for persistent storage so code like this gives us the actual path to the volume: volume=$(kubectl describe pvc sas-pyconfig | grep Volume: | awk '{print $NF}') pvPath=$(kubectl describe pv ${volume} | grep Path: | awk '{print $NF}') echo pvPath is ${pvPath} You will need sudo or a privileged account to copy extlang.xml to $pvPath but once you have it there, the change-configuration.xml should take care of mounting the path to your CAS pods so there should be no need for you to have to copy the file yourself. Hope that helps.  ... View more