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K8s Objects

Kubernetes object types: Nodes, Namespaces, Pods, ReplicaSets, Deployments, DaemonSets, etc. - 2023100413053333 K8s Node - 2023100413055050 K8s Namespace - 2023100413062626 K8s Pod - Replication controller - ReplicationController no longer a recommended controller - 2023100413063232 K8s ReplicaSet - 2023100413063636 K8s Deployment - 2023100413064141 K8s DaemonSet - 2023100413065252 K8s Label - 2023100618413333 K8s Arbitrary strings - 2023100618164444 K8s Operators and controllers

Multi-tenancy objects

  • 2023100413055050 K8s Namespace
    • Kubernetes objects may be created in a namespace or cluster-scoped
    • Users can be limited by the object verbs allowed per namespace.
    • Two objects cannot have the same Name: value in the same namespace.
  • context
    • It is a combination of: cluster name, namespace, user
    • For examples you can have a development cluster and production cluster. all information located here ~/.kube/config.
  • Resource Limits - You can request a minimum amount of resources reserved for pod - You can set resource limit per-pod, per-namespaces. - per-namespaces resource limits have priority over PodSpec resource limits
  • Pod Security Policies
    • Deprecated
  • Pod Security Admission
    • beta feature, is used to restrict pod behavior in an easy-to-implement and easy-to-understand manner.
    • leverage profiles: Privileged, Baseline, and Restricted policies.
  • Network Policies
    • Ingress and Egress traffic can be limited according to namespaces and labels

References

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