Guides

Ensure that the admission control plugin NamespaceLifecycle is set (API Server)

Reject creating objects in a namespace that is undergoing termination. Setting admission control policy to NamespaceLifecycle ensures that objects cannot be created in non-existent namespaces, and that namespaces undergoing termination are not used for creating the new objects. This is recommended to enforce the integrity of the namespace termination process and also for the availability of the newer objects.

Suggest Edits

Risk Level: Low
Cloud Entity: Pods
CloudGuard Rule ID: D9.K8S.NET.11
Covered by Spectral: Yes
Category: Compute

GSL LOGIC

KubernetesPod where labels contain [value='kube-apiserver'] and namespace = 'kube-system' should have spec.containers with [(parsedArgs contain [key like 'disable-admission-plugins' and value unlike '%NamespaceLifecycle%']) or (parsedArgs contain-none [key like 'disable-admission-plugins'])]

REMEDIATION

Edit the API server pod specification file $apiserverconf
on the master node and set the --disable-admission-plugins parameter to
ensure it does not include NamespaceLifecycle.
--disable-admission-plugins=...,NamespaceLifecycle,...

References

  1. https://kubernetes.io/docs/admin/kube-apiserver/
  2. https://kubernetes.io/docs/admin/admission-controllers/#namespacelifecycle

Pods

Pods are the smallest deployable units of computing that can be created and managed in Kubernetes.A Pod is a group of one or more containers (such as Docker containers), with shared storage/network, and a specification for how to run the containers.

Compliance Frameworks

  • CIS Kubernetes Benchmark v1.20
  • CIS Kubernetes Benchmark v1.23
  • CIS Kubernetes Benchmark v1.24
  • CIS Kubernetes Benchmark v1.4.0
  • CIS Kubernetes Benchmark v1.5.1
  • CIS Kubernetes Benchmark v1.6.1
  • Kubernetes NIST.SP.800-190
  • Kubernetes v.1.13 CloudGuard Best Practices
  • Kubernetes v.1.14 CloudGuard Best Practices

Updated over 1 year ago