WARNING: this policy requires Kubewarden 1.6.0 or later

This policy is meant to be used together with Rancher Manager.

Rancher Manager introduces the concept of Project. Projects group different Kubernetes Namespace and can enforce resource quotas across all of them. To learn more about Rancher Projects, checkout the official documentation.

Rancher Manager UI prevents the creation of Namespace under a given Project once its ResourceQuota is exceeded.

This policy complements Rancher Manager by introducing the same set of checks for all the requests issued against the Kubernetes API server (like via kubectl).

Settings

This policy does not have any configuration value.

Example

Create a project under the Rancher Manager UI:

• Cluster
• Project/Namespaces
• Create Project
• Resource Quota Tab
• Select "CPU Reservation" from the dropdown
• Set Project Limit as 500 and Namespace as Limit as 100
• Create

Get the cluster id(e.g., local) combined with Project ID(e.g., p-sd7dh) and enter in below yaml to create namespace with requestsCpu as 400m under the project.

Create a new Namespace using a definition like the following one:

apiVersion: v1
kind: Namespace
metadata:
  name: one
  annotations:
    field.cattle.io/projectId: local:p-sd7dh
    field.cattle.io/resourceQuota: '{"limit":{"requestsCpu":"400m"}}'
  labels:
    field.cattle.io/projectId: p-sd7dh

Create another Namespace which allocates all the remaining quota of requestsCpu:

apiVersion: v1
kind: Namespace
metadata:
  name: two
  annotations:
    field.cattle.io/projectId: local:p-sd7dh
    field.cattle.io/resourceQuota: '{"limit":{"requestsCpu":"100m"}}'
  labels:
    field.cattle.io/projectId: p-sd7dh

Now, all the quota of requestsCpu is exhausted inside of the Project.

This policy will prevent the creation of other Namespace under the project:

apiVersion: v1
kind: Namespace
metadata:
  name: three
  annotations:
    field.cattle.io/projectId: local:p-sd7dh
    field.cattle.io/resourceQuota: '{"limit":{"requestsCpu":"100m"}}'
  labels:
    field.cattle.io/projectId: p-sd7dh 

This time the project creation will be rejected.