Namespace

Namespaces.

• kube-system : objects that created by k8s system, mostly control plane objects.
• kube-public: unsecure and readable by anyone objects, exposing public information about cluster.
• kube-node-lease: lease objects for heartbeat data. You can create additional namespaces to isolate developer teams , users, applications

  kubectl create namespace new-namespace-name
  

References

1. LinuxFoundationX LFS158x.1. Chapter 8. Kubernetes Building Blocks
2. https://trainingportal.linuxfoundation.org/courses/kubernetes-for-developers-lfd259 Kubernetes Architecture