Here is the lap of CKA course in which we are tasked to take a backup of etcd. But when trying to take backup using relevant endpoints and certs is showing not found for --cert environment variable.
To begin with, you need to see where the ETCD pod is running.
ETCD is an essential component of the controlplane, operating on the controlplane node. To perform operations such as backup or restore on ETCD, you must SSH into the controlplane node rather than attempting to execute these actions from the student-node."