Restrict Seccomp

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: restrict-seccomp
 5  annotations:
 6    policies.kyverno.io/title: Restrict Seccomp
 7    policies.kyverno.io/category: Pod Security Standards (Baseline)
 8    policies.kyverno.io/severity: medium
 9    policies.kyverno.io/subject: Pod
10    kyverno.io/kyverno-version: 1.6.0
11    kyverno.io/kubernetes-version: "1.22-1.23"
12    policies.kyverno.io/description: >-
13      The seccomp profile must not be explicitly set to Unconfined. This policy, 
14      requiring Kubernetes v1.19 or later, ensures that seccomp is unset or 
15      set to `RuntimeDefault` or `Localhost`.      
16spec:
17  background: true
18  validationFailureAction: audit
19  rules:
20    - name: check-seccomp
21      match:
22        any:
23        - resources:
24            kinds:
25              - Pod
26      validate:
27        message: >-
28          Use of custom Seccomp profiles is disallowed. The fields
29          spec.securityContext.seccompProfile.type,
30          spec.containers[*].securityContext.seccompProfile.type,
31          spec.initContainers[*].securityContext.seccompProfile.type, and
32          spec.ephemeralContainers[*].securityContext.seccompProfile.type
33          must be unset or set to `RuntimeDefault` or `Localhost`.          
34        pattern:
35          spec:
36            =(securityContext):
37              =(seccompProfile):
38                =(type): "RuntimeDefault | Localhost"      
39            =(ephemeralContainers):
40            - =(securityContext):
41                =(seccompProfile):
42                  =(type): "RuntimeDefault | Localhost"
43            =(initContainers):
44            - =(securityContext):
45                =(seccompProfile):
46                  =(type): "RuntimeDefault | Localhost"
47            containers:
48            - =(securityContext):
49                =(seccompProfile):
50                  =(type): "RuntimeDefault | Localhost"
51