Block Tekton TaskRun

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: block-tekton-task-runs
 5  annotations:
 6    policies.kyverno.io/title: Block Tekton TaskRun
 7    policies.kyverno.io/category: Tekton
 8    policies.kyverno.io/severity: medium
 9    policies.kyverno.io/subject: TaskRun
10    kyverno.io/kyverno-version: 1.7.1
11    policies.kyverno.io/minversion: 1.6.0
12    kyverno.io/kubernetes-version: "1.23"
13    policies.kyverno.io/description: >-
14      Restrict creation of TaskRun resources to the Tekton pipelines controller.
15spec:
16  validationFailureAction: Audit
17  background: false
18  rules:
19  - name: check-taskrun-user
20    match:
21      any:
22      - resources:
23          kinds:
24            - TaskRun
25    exclude:
26      any:
27      - subjects:
28        - kind: User 
29          name: "system:serviceaccount:tekton-pipelines:tekton-pipelines-controller"
30    preconditions:
31      all:
32      - key: "{{ request.operation || 'BACKGROUND' }}"
33        operator: AnyIn
34        value:
35        - CREATE
36        - UPDATE
37    validate:
38      message: Creating a TaskRun is not allowed.
39      deny: {}