CNI in use supports network policies
Set up the kubernetes integration.
Description
There are a variety of CNI plugins available for Kubernetes. If the CNI in use does not support network policies, it may not be possible to effectively restrict traffic in the cluster.
Rationale
Kubernetes network policies are enforced by the CNI plugin in use. It is important to ensure that the CNI plugin supports both ingress and egress network policies.
If the CNI plugin in use does not support network policies, consideration should be given to making use of a different plugin, or finding an alternate mechanism for restricting traffic in the Kubernetes cluster.
Impact
None
Default value
This will depend on the CNI plugin in use.
References
- https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/
Notes: One example here is Flannel which does not support Network policy unless Calico is also in use.
CIS controls
None
Audit
Review the documentation of CNI plugin in use by the cluster, and confirm that it supports Ingress and Egress network policies.
