Add Default securityContext

A Pod securityContext entry defines fields such as the user and group which should be used to run the Pod. Sometimes choosing default values for users rather than blocking is a better alternative to not impede such Pod definitions. This policy will mutate a Pod to set `runAsUser`, `runAsGroup`, and `fsGroup` fields within the Pod securityContext if they are not already set.

Policy Definition

/other/add-default-securitycontext.yaml

 1apiVersion: kyverno.io/v1
 2kind: ClusterPolicy
 3metadata:
 4  name: add-default-securitycontext
 5  annotations:
 6    policies.kyverno.io/title: Add Default securityContext
 7    policies.kyverno.io/category: Sample
 8    policies.kyverno.io/subject: Pod
 9    policies.kyverno.io/description: >-
10      A Pod securityContext entry defines fields such as the user and group which should be used to run the Pod.
11      Sometimes choosing default values for users rather than blocking is a better alternative to not impede
12      such Pod definitions. This policy will mutate a Pod to set `runAsUser`, `runAsGroup`, and `fsGroup` fields
13      within the Pod securityContext if they are not already set.      
14spec:
15  background: false
16  rules:
17  - name: add-default-securitycontext
18    match:
19      resources:
20        kinds:
21        - Pod
22    mutate:
23      patchStrategicMerge:
24        spec:
25          securityContext:
26            +(runAsUser): 1000
27            +(runAsGroup): 3000
28            +(fsGroup): 2000
29

Create policy issue