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Kubernetes Namespaces

  • Namespaces provide a way to partition and organize resources within a k8s cluster.
  • They can be created using kubectl or yaml config file. k8s-namespaces.png
  • Namespaces can be used for logical groupings.
  • For example dev, test, prod etc.
  • If a resource is name spaced that means it cannot be created without a namespace.

Default namespace types in K8s​

  • When we create a new k8s cluster by default it has following name spaces:
    • default: the default k8s namespace is used for resources that don't have a specific namespace specified when created.
    • kube-node-lease: This namespace manages Lease objects associated with each cluster nodes. Node leases function as heartbeats, allowing control plane to efficiently monitor node availability and failures.
    • kube-system: This namespace is strictly reserved for core k8s control plane components. It houses foundational infrastructure like the API server, scheduler and DNS services.
    • kube-public: This namespace is readable by all clients, including unauthenticated users. It is used for bootstrapping and cluster wide public data like cluster info or certificates.
kubectl get namespaces