Upgrading your Cluster with Zero Downtime

If we were to update Node-selector in every Name-space deployment yaml file, we could not proceed in this manner. The new node pool name must be updated in the NodeSelector yaml file section, and then the instructions must be followed.

Provide the solution when node-selector is enabled in every yaml file. How to efficiently complete the task of upgrading.

When you cordon and drain the node one at a time, there is a chance that the drained pods can get scheduled on old node pool nodes and not necessarily on new node pool nodes.

Please upload more videos on this topics

Cordon not only makes a node nonscheduled for new pods, but also the Load balancer no longer redirect traffic to perfectly healthy pods on a cordoned node.

Great lesson! Thank you for this!

Should this recommendation be deprecated in favor of using deployments and Horizontal Pod Autoscaler?

nice explanation sandeep
and i would like to know any official online course in advance level ,already i have some idea till intermediate level practiced too from offical docs and i wanna do more complex projects or tasks under your training ?????? .... urgently from your end Sandeep

Very good explanation, as always. Thanks!