I have a kubernetes Cluster on Nutanix with 1 Master Node and 2 Worker Nodes(Test ENV). All the Nodes have Kubernetes version of 1.20.x. I want to Update the all the Nodes kubernetes version to 1.21.x. without the Downtime of application/services running on it.
I have Seen in Nutanix guide which is easy step to upgrade kubernetes version but it says application may have downtime.
Any Ideas and Inputs to upgrade Kubernetes version from 1.20.x to 1.21.x withoutdown of apps.