2.9. 管理安全策略

运行以下命令来创建策略：

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

定义策略使用的模板。通过添加 policy-templates 字段来定义模板来编辑 YAML 文件。您的策略可能类似以下 YAML 文件：

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"]

定义一个 PlacementBinding 资源，将您的策略绑定到 Placement 资源。您的 PlacementBinding 资源可能类似以下 YAML 示例：

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

完成 Create policy 表单，然后选择 提交按钮。您的 YAML 文件可能类似以下策略：

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

请参阅以下 PlacementBinding 示例：

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

请参阅以下 Placement 示例：

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

运行以下命令来编辑您的策略集：

oc edit policysets <your-policyset-name>

要允许将订阅应用到集群，您必须应用 policy-configure-subscription-admin-hub.yaml 策略，并将补救操作设置为 enforce。将以下 YAML 复制并粘贴到控制台的 YAML 编辑器中：

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"]}

要从命令行界面应用前面的 YAML，请运行以下命令：

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

策略安装到 policies 命名空间。您必须将该命名空间绑定到 ClusterSet。例如，复制并应用以下示例 YAML 将命名空间绑定到默认的 ClusterSet ：

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

运行以下命令以从命令行界面应用 ManagedClusterSetBinding 资源：

oc apply -f managed-cluster.yaml

使用 kustomize 命令将策略应用到您的 hub 集群：

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

注： 对于您不想安装的 OpenShift Platform Plus 的任何组件，请编辑 policyGenerator.yaml 文件并删除或注释掉这些组件的策略。