2.9. 보안 정책 관리

다음 명령을 실행하여 정책을 생성합니다.

oc create -f policy.yaml -n <policy-namespace>

정책에서 사용하는 템플릿을 정의합니다. 템플릿을 정의하는 policy-templates 필드를 추가하여 YAML 파일을 편집합니다. 정책은 다음 YAML 파일과 유사할 수 있습니다.

apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy1
spec:
  remediationAction: "enforce" # or inform
  disabled: false # or true
  namespaceSelector:
    include:
    - "default"
    - "my-namespace"
  policy-templates:
    - objectDefinition:
        apiVersion: policy.open-cluster-management.io/v1
        kind: ConfigurationPolicy
        metadata:
          name: operator
          # namespace: # will be supplied by the controller via the namespaceSelector
        spec:
          remediationAction: "inform"
          object-templates:
          - complianceType: "musthave" # at this level, it means the role must exist and must have the following rules
            apiVersion: rbac.authorization.k8s.io/v1
            kind: Role
            metadata:
              name: example
            objectDefinition:
              rules:
                - complianceType: "musthave" # at this level, it means if the role exists the rule is a musthave
                  apiGroups: ["extensions", "apps"]
                  resources: ["deployments"]
                  verbs: ["get", "list", "watch", "create", "delete","patch"]

정책을 배치 리소스에 바인딩할 Placement Binding 리소스를 정의합니다. PlacementBinding 리소스는 다음 YAML 샘플과 유사할 수 있습니다.

apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
  name: binding1
placementRef:
  name: placement1
  apiGroup: cluster.open-cluster-management.io
  kind: Placement
subjects:
- name: policy1
  apiGroup: policy.open-cluster-management.io
  kind: Policy

Create policy 양식을 작성한 다음 Submit (제출) 버튼을 선택합니다. YAML 파일은 다음 정책과 유사할 수 있습니다.

apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy-pod
  annotations:
    policy.open-cluster-management.io/categories: 'SystemAndCommunicationsProtections,SystemAndInformationIntegrity'
    policy.open-cluster-management.io/controls: 'control example'
    policy.open-cluster-management.io/standards: 'NIST,HIPAA'
    policy.open-cluster-management.io/description:
spec:
  complianceType: musthave
  namespaces:
    exclude: ["kube*"]
    include: ["default"]
    pruneObjectBehavior: None
  object-templates:
  - complianceType: musthave
    objectDefinition:
      apiVersion: v1
      kind: Pod
      metadata:
        name: pod1
      spec:
        containers:
        - name: pod-name
          image: 'pod-image'
          ports:
          - containerPort: 80
  remediationAction: enforce
  disabled: false

다음 PlacementBinding 예제를 참조하십시오.

apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
  name: binding-pod
placementRef:
  name: placement-pod
  kind: Placement
  apiGroup: cluster.open-cluster-management.io
subjects:
- name: policy-pod
  kind: Policy
  apiGroup: policy.open-cluster-management.io

다음 배치 예제를 참조하십시오.

apiVersion: cluster.open-cluster-management.io/v1beta1
 kind: Placement
 metadata:
   name: placement-pod
spec:
  predicates:
  - requiredClusterSelector:
      labelSelector:
        matchLabels:
          cloud: "IBM"

다음 명령을 실행하여 정책 세트를 편집합니다.

oc edit policysets <your-policyset-name>

서브스크립션을 클러스터에 적용할 수 있도록 하려면 policy-configure-subscription-admin-hub.yaml 정책을 적용하고 적용하도록 수정 작업을 설정해야 합니다. 다음 YAML을 복사하여 콘솔의 YAML 편집기에 붙여넣습니다.

apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy-configure-subscription-admin-hub
  annotations:
    policy.open-cluster-management.io/standards: NIST SP 800-53
    policy.open-cluster-management.io/categories: CM Configuration Management
    policy.open-cluster-management.io/controls: CM-2 Baseline Configuration
spec:
  remediationAction: inform
  disabled: false
  policy-templates:
    - objectDefinition:
        apiVersion: policy.open-cluster-management.io/v1
        kind: ConfigurationPolicy
        metadata:
          name: policy-configure-subscription-admin-hub
        spec:
          remediationAction: inform
          severity: low
          object-templates:
            - complianceType: musthave
              objectDefinition:
                apiVersion: rbac.authorization.k8s.io/v1
                kind: ClusterRole
                metadata:
                  name: open-cluster-management:subscription-admin
                rules:
                - apiGroups:
                  - app.k8s.io
                  resources:
                  - applications
                  verbs:
                  - '*'
                - apiGroups:
                  - apps.open-cluster-management.io
                  resources:
                  - '*'
                  verbs:
                  - '*'
                - apiGroups:
                  - ""
                  resources:
                  - configmaps
                  - secrets
                  - namespaces
                  verbs:
                  - '*'
            - complianceType: musthave
              objectDefinition:
                apiVersion: rbac.authorization.k8s.io/v1
                kind: ClusterRoleBinding
                metadata:
                  name: open-cluster-management:subscription-admin
                roleRef:
                  apiGroup: rbac.authorization.k8s.io
                  kind: ClusterRole
                  name: open-cluster-management:subscription-admin
                subjects:
                - apiGroup: rbac.authorization.k8s.io
                  kind: User
                  name: kube:admin
                - apiGroup: rbac.authorization.k8s.io
                  kind: User
                  name: system:admin
---
apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
  name: binding-policy-configure-subscription-admin-hub
placementRef:
  name: placement-policy-configure-subscription-admin-hub
  kind: Placement
  apiGroup: cluster.open-cluster-management.io
subjects:
- name: policy-configure-subscription-admin-hub
  kind: Policy
  apiGroup: policy.open-cluster-management.io
---
apiVersion: cluster.open-cluster-management.io/v1beta1
kind: Placement
metadata:
  name: placement-policy-configure-subscription-admin-hub
spec:
  predicates:
  - requiredClusterSelector:
      labelSelector:
        matchExpressions:
        - {key: name, operator: In, values: ["local-cluster"]}

명령줄 인터페이스에서 이전 YAML을 적용하려면 다음 명령을 실행합니다.

oc apply -f policy-configure-subscription-admin-hub.yaml

정책은 정책 네임스페이스에 설치됩니다. 해당 네임스페이스를 ClusterSet 에 바인딩해야 합니다. 예를 들어 다음 예제 YAML을 복사하고 적용하여 네임스페이스를 기본 ClusterSet 에 바인딩합니다.

apiVersion: cluster.open-cluster-management.io/v1beta2
kind: ManagedClusterSetBinding
metadata:
    name: default
    namespace: policies
spec:
    clusterSet: default

다음 명령을 실행하여 명령줄 인터페이스에서 ManagedClusterSetBinding 리소스를 적용합니다.

oc apply -f managed-cluster.yaml

kustomize 명령을 사용하여 허브 클러스터에 정책을 적용합니다.

kustomize build --enable-alpha-plugins  | oc apply -f -

참고: 설치하지 않으려는 OpenShift Platform Plus의 구성 요소의 경우 policyGenerator.yaml 파일을 편집하고 해당 구성 요소의 정책을 제거하거나 주석 처리합니다.