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policy-gatekeeper-disallow-anonymous.yaml
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apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
name: policy-gatekeeper-disallow-anonymous
annotations:
policy.open-cluster-management.io/standards: NIST SP 800-53
policy.open-cluster-management.io/categories: AC Access Control
policy.open-cluster-management.io/controls: AC-2 Account Management
spec:
remediationAction: enforce
disabled: false
policy-templates:
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-disallow-anonymous
spec:
remediationAction: enforce
severity: low
object-templates:
- complianceType: musthave
objectDefinition:
apiVersion: templates.gatekeeper.sh/v1beta1
kind: ConstraintTemplate
metadata:
name: k8sdisallowanonymous
annotations:
description: Disallows connections from anonymous users.
spec:
crd:
spec:
names:
kind: K8sDisallowAnonymous
targets:
- target: admission.k8s.gatekeeper.sh
rego: |
package k8sdisallowanonymous
violation[{"msg": msg}] {
review(input.review.object.subjects[_])
msg := sprintf("Unauthenticated user reference is not allowed in %v %v ", [input.review.object.kind, input.review.object.metadata.name])
}
review(subject) = true {
subject.name == "system:unauthenticated"
}
review(subject) = true {
subject.name == "system:anonymous"
}
- complianceType: musthave
objectDefinition:
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowAnonymous
metadata:
name: no-anonymous
spec:
enforcementAction: dryrun
match:
kinds:
- apiGroups: ["rbac.authorization.k8s.io"]
kinds: ["ClusterRoleBinding"]
- apiGroups: ["rbac.authorization.k8s.io"]
kinds: ["RoleBinding"]
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-audit-disallow-anonymous
spec:
remediationAction: inform # will be overridden by remediationAction in parent policy
severity: low
object-templates:
- complianceType: musthave
objectDefinition:
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowAnonymous
metadata:
name: no-anonymous
status:
totalViolations: 0
- objectDefinition:
apiVersion: policy.open-cluster-management.io/v1
kind: ConfigurationPolicy
metadata:
name: policy-gatekeeper-admission-disallow-anonymous
spec:
remediationAction: inform # will be overridden by remediationAction in parent policy
severity: low
object-templates:
- complianceType: mustnothave
objectDefinition:
apiVersion: v1
kind: Event
metadata:
namespace: openshift-gatekeeper-system # set it to the actual namespace where gatekeeper is running if different
annotations:
constraint_action: deny
constraint_kind: K8sDisallowAnonymous
constraint_name: no-anonymous
event_type: violation
---
apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
name: binding-policy-gatekeeper-disallow-anonymous
placementRef:
name: placement-policy-gatekeeper-disallow-anonymous
kind: PlacementRule
apiGroup: apps.open-cluster-management.io
subjects:
- name: policy-gatekeeper-disallow-anonymous
kind: Policy
apiGroup: policy.open-cluster-management.io
---
apiVersion: apps.open-cluster-management.io/v1
kind: PlacementRule
metadata:
name: placement-policy-gatekeeper-disallow-anonymous
spec:
clusterSelector:
matchExpressions:
- {key: environment, operator: In, values: ["dev"]}