A namespace functions as a grouping mechanism inside of Kubernetes. Pods, volumes, ReplicaSets, and services can easily cooperate within a namespace, but the namespace provides an isolation from the other parts of the cluster. What would be the possible use case for such isolation? Well, namespaces let you manage different environments within the same cluster. For example, you can have different test and staging environments in the same cluster of machines.
This could potentially save some resources in your infrastructure, but it can be dangerous; without namespaces, it would be risky to roll out a new version of your software to test the environment, having the pre-release version running on the same cluster. By having namespaces ...
