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1.3. 卸载使用 RHACM 安装的 OpenShift Data Foundation Logical Volume Manager Operator

在使用 RHACM 安装 Operator 时卸载 OpenShift Data Foundation Logical Volume Manager Operator，您需要删除您为部署和配置 Operator 创建的 ACM 策略。但是，当您删除 ACM 策略时，策略创建的资源不会被删除。您需要创建额外的策略来删除资源。

因为在删除策略时不会删除创建的资源，您需要执行以下步骤：

  • 删除逻辑卷管理器 Operator 置备的所有 PVC 和卷快照。
  • 删除 LVMCluster 资源来清理在磁盘中创建的逻辑卷管理器资源。
  • 创建额外策略来卸载 Operator。

先决条件

  • 确保在删除策略前删除以下内容：

    • 受管集群中的所有应用程序都使用 OpenShift Data Foundation 逻辑卷管理器 Operator 置备的存储。
    • 使用 OpenShift Data Foundation 逻辑卷管理器 Operator 置备的持久性卷声明(PVC)和持久性卷(PV)。
    • OpenShift Data Foundation Logical Volume Manager Operator 置备的所有卷快照。
  • 使用 oc get logicalvolume 命令确保不存在逻辑卷资源。
  • 使用具有 cluster-admin 角色的用户访问 RHACM 集群。

流程

  1. 在 OpenShift 命令行界面中，使用以下命令删除您为在 hub 集群中部署和配置 OpenShift Data Foundation Logical Volume Manager Operator 创建的 ACM 策略： 

    # oc delete -f policy-lvm-operator.yaml -n lvm-policy-ns

  2. 使用名称（如 odf-lvmcluster-deletion.yaml ）将以下 YAML 保存到文件中，以创建一个用于删除 LVMCluster 的策略。这可让操作员清理在集群中创建的所有逻辑卷管理器资源。 

    apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy-lvmcluster-delete
  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: enforce
  disabled: false
  policy-templates:
    - objectDefinition:
        apiVersion: policy.open-cluster-management.io/v1
        kind: ConfigurationPolicy
        metadata:
          name: policy-lvmcluster-removal
        spec:
          remediationAction: enforce # the policy-template spec.remediationAction is overridden by the preceding parameter value for spec.remediationAction.
          severity: low
          object-templates:
            - complianceType: mustnothave
              objectDefinition:
                kind: LVMCluster
                apiVersion: lvm.topolvm.io/v1alpha1
                metadata:
                  name: odf-lvmcluster
                  namespace: openshift-storage # must have namespace 'openshift-storage'
---
apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
 name: binding-policy-lvmcluster-delete
placementRef:
 apiGroup: apps.open-cluster-management.io
 kind: PlacementRule
 name: placement-policy-lvmcluster-delete
subjects:
 - apiGroup: policy.open-cluster-management.io
   kind: Policy
   name: policy-lvmcluster-delete
---
apiVersion: apps.open-cluster-management.io/v1
kind: PlacementRule
metadata:
 name: placement-policy-lvmcluster-delete
spec:
 clusterConditions:
   - status: 'True'
     type: ManagedClusterConditionAvailable
 clusterSelector:
   matchExpressions:
     - key: vendor
       operator: In
       values:
         - OpenShift

  3. 运行以下命令来创建策略： 

    # oc create -f odf-lvmcluster-deletion.yaml -n lvm-policy-ns

  4. 使用名称（如 check-odf-lvmcluster-deletion.yaml）将以下 YAML 保存到文件中，以创建一个策略来检查 LVMCluster CR 是否已移除。 

    apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  name: policy-lvmcluster-inform
  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-lvmcluster-removal-inform
        spec:
          remediationAction: inform # the policy-template spec.remediationAction is overridden by the preceding parameter value for spec.remediationAction.
          severity: low
          object-templates:
            - complianceType: mustnothave
              objectDefinition:
                kind: LVMCluster
                apiVersion: lvm.topolvm.io/v1alpha1
                metadata:
                  name: odf-lvmcluster
                  namespace: openshift-storage # must have namespace 'openshift-storage'
---
apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
 name: binding-policy-lvmcluster-check
placementRef:
 apiGroup: apps.open-cluster-management.io
 kind: PlacementRule
 name: placement-policy-lvmcluster-check
subjects:
 - apiGroup: policy.open-cluster-management.io
   kind: Policy
   name: policy-lvmcluster-inform
---
apiVersion: apps.open-cluster-management.io/v1
kind: PlacementRule
metadata:
 name: placement-policy-lvmcluster-check
spec:
 clusterConditions:
   - status: 'True'
     type: ManagedClusterConditionAvailable
 clusterSelector:
   matchExpressions:
     - key: vendor
       operator: In
       values:
         - OpenShift

  5. 运行以下命令来创建策略： 

    # oc create -f check-odf-lvmcluster-deletion.yaml -n lvm-policy-ns

  6. 检查策略状态。 

    # oc get policy -n lvm-policy-ns
NAME                       REMEDIATION ACTION   COMPLIANCE STATE   AGE
policy-lvmcluster-delete   enforce              Compliant          15m
policy-lvmcluster-inform   inform               Compliant          15m

  7. 在两个策略都合规后，将以下 YAML 保存到一个文件（例如 odf-lvm-operator-remove-policy.yaml），以创建用于卸载 OpenShift Data Foundation Logical Volume Manager Operator 的策略。 

    apiVersion: apps.open-cluster-management.io/v1
kind: PlacementRule
metadata:
  name: placement-uninstall-odf-lvm-operator
spec:
  clusterConditions:
  - status: "True"
    type: ManagedClusterConditionAvailable
  clusterSelector:
    matchExpressions:
    - key: vendor
      operator: In
      values:
      - OpenShift
---
apiVersion: policy.open-cluster-management.io/v1
kind: PlacementBinding
metadata:
  name: binding-uininstall-odf-lvm-operator
placementRef:
  apiGroup: apps.open-cluster-management.io
  kind: PlacementRule
  name: placement-uninstall-odf-lvm-operator
subjects:
- apiGroup: policy.open-cluster-management.io
  kind: Policy
  name: uninstall-odf-lvm-operator
---
apiVersion: policy.open-cluster-management.io/v1
kind: Policy
metadata:
  annotations:
    policy.open-cluster-management.io/categories: CM Configuration Management
    policy.open-cluster-management.io/controls: CM-2 Baseline Configuration
    policy.open-cluster-management.io/standards: NIST SP 800-53
  name: uninstall-odf-lvm-operator
spec:
  disabled: false
  policy-templates:
  - objectDefinition:
      apiVersion: policy.open-cluster-management.io/v1
      kind: ConfigurationPolicy
      metadata:
        name: uninstall-odf-lvm-operator
      spec:
        object-templates:
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: v1
            kind: Namespace
            metadata:
              name: openshift-storage
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: operators.coreos.com/v1
            kind: OperatorGroup
            metadata:
              name: openshift-storage-operatorgroup
              namespace: openshift-storage
            spec:
              targetNamespaces:
              - openshift-storage
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: operators.coreos.com/v1alpha1
            kind: Subscription
            metadata:
              name: odf-lvm-operator
              namespace: openshift-storage
            spec:
              installPlanApproval: Automatic
              name: odf-lvm-operator
              source: redhat-operators
              sourceNamespace: openshift-marketplace
        remediationAction: enforce
        severity: low
  - objectDefinition:
      apiVersion: policy.open-cluster-management.io/v1
      kind: ConfigurationPolicy
      metadata:
        name: policy-remove-lvm-operator-crds
      spec:
        object-templates:
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: apiextensions.k8s.io/v1
            kind: CustomResourceDefinition
            metadata:
              name: logicalvolumes.topolvm.cybozu.com
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: apiextensions.k8s.io/v1
            kind: CustomResourceDefinition
            metadata:
              name: lvmclusters.lvm.topolvm.io
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: apiextensions.k8s.io/v1
            kind: CustomResourceDefinition
            metadata:
              name: lvmvolumegroupnodestatuses.lvm.topolvm.io
        - complianceType: mustnothave
          objectDefinition:
            apiVersion: apiextensions.k8s.io/v1
            kind: CustomResourceDefinition
            metadata:
              name: lvmvolumegroups.lvm.topolvm.io
        remediationAction: enforce
        severity: high

  8. 运行以下命令来创建策略： 

    # oc create -f odf-lvm-operator-remove-policy.yaml -ns lvm-policy-ns
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