Block Pod Exec by Pod and Container

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: deny-exec-by-pod-and-container
  annotations:
    policies.kyverno.io/title: Block Pod Exec by Pod and Container
    policies.kyverno.io/category: Sample
    policies.kyverno.io/minversion: 1.6.0
    policies.kyverno.io/subject: Pod
    policies.kyverno.io/description: The `exec` command may be used to gain shell access, or run other commands, in a Pod's container. While this can be useful for troubleshooting purposes, it could represent an attack vector and is discouraged. This policy blocks Pod exec commands to containers named `nginx` in Pods starting with name `myapp-maintenance`.
spec:
  validationFailureAction: Enforce
  background: false
  rules:
    - name: deny-nginx-exec-in-myapp-maintenance
      match:
        any:
          - resources:
              kinds:
                - Pod/exec
      preconditions:
        all:
          - key: "{{ request.operation || 'BACKGROUND' }}"
            operator: Equals
            value: CONNECT
          - key: "{{ request.name }}"
            operator: Equals
            value: myapp-maintenance*
      validate:
        message: Nginx containers inside myapp-maintanence Pods may not be exec'd into.
        deny:
          conditions:
            all:
              - key: "{{ request.object.container }}"
                operator: Equals
                value: nginx