1.1.15 Ensure that the admission control policy is set to NamespaceLifecycle

Information

Reject creating objects in a namespace that is undergoing termination.

Rationale:

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.

Solution

Edit the `/etc/kubernetes/apiserver` file on the master node and set the `KUBE_ADMISSION_CONTROL` parameter to `'--admission-control=NamespaceLifecycle,...'`: `KUBE_ADMISSION_CONTROL='--admission-control=NamespaceLifecycle,...'`

Based on your system, restart the `kube-apiserver` service. For example: `systemctl restart kube-apiserver.service`

Impact:

None

See Also

https://workbench.cisecurity.org/files/1738

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6, CSCv6|14

Plugin: Unix

Control ID: 70f90ecd19e6dd375b171b31b526dc3549599ddc61f2fcaf20faf0e55a7c161e