6.2. 使用命令行创建 LocalVolumeSet 自定义资源

创建 LocalVolumeSet 自定义资源，根据您指定的条件自动将某些存储设备置备为持久性卷。对于任何符合 nodeSelector 条件的节点中的 deviceInclusionSpec 条件的设备都会创建持久性卷。

先决条件

  • 对 OpenShift Container Platform 集群的管理访问权限。

流程

  1. 在 local-volume-set.yaml 文件中定义 LocalVolumeSet 自定义资源。 

    apiVersion: local.storage.openshift.io/v1alpha1
kind: LocalVolumeSet
metadata:
  name: localblock
spec:
  nodeSelector:
    nodeSelectorTerms:
      - matchExpressions:
          - key: kubernetes.io/hostname
            operator: In
            values:
              - worker1.example.com
              - worker2.example.com
              - worker3.example.com
  storageClassName: localblock
  volumeMode: Block
  maxDeviceCount: 10 # optional, limit devices provisioned per node
  deviceInclusionSpec:
    deviceTypes: # list of types to allow
      - disk
      - part # omit this to use only whole devices
    deviceMechanicalProperty:
      - NonRotational
    minSize: 100Gi # optional, minimum size of device to allow
    maxSize: 100Ti # optional, maximum size of device to allow
    models: # (optional) list of models to allow
      - SAMSUNG
      - Crucial_CT525MX3
    vendors: # (optional) list of device vendors to allow
      - ATA
      - ST2000LM

    以上定义从 worker 1、worker2 和 worker 3 节点选择特定类型的非轮转设备上的整个磁盘或分区，这些分区的大小为 100 GB 到 100 TB。创建 本地块存储 类，并从发现的设备置备持久性卷。

    重要

    为 minSize 选择一个适当的值，以确保未选择系统分区。

  2. 创建 LocalVolumeSet。 

    $ oc create -f local-volume-set.yaml

验证步骤

  1. 使用以下命令，跟踪与 deviceInclusionSpec 匹配的设备的持久性卷置备。调配持久卷可能需要几分钟时间。 

    $ oc describe localvolumeset localblock
[...]
Status:
  Conditions:
    Last Transition Time:          2020-11-17T05:03:32Z
    Message:                       DiskMaker: Available, LocalProvisioner: Available
    Status:                        True
    Type:                          DaemonSetsAvailable
    Last Transition Time:          2020-11-17T05:03:34Z
    Message:                       Operator reconciled successfully.
    Status:                        True
    Type:                          Available
  Observed Generation:             1
  Total Provisioned Device Count: 4
Events:
Type    Reason      Age          From                Message
----    ------      ----         ----                -------
Normal  Discovered  2m30s (x4    localvolumeset-     ip-10-0-147-124.us-east-
        NewDevice   over 2m30s)  symlink-controller  2.compute.internal -
                                                     found possible matching
                                                     disk, waiting 1m to claim
Normal  FoundMatch  89s (x4      localvolumeset-     ip-10-0-147-124.us-east-
        ingDisk     over 89s)    symlink-controller  2.compute.internal -
                                                     symlinking matching disk

  2. 验证调配的持久卷的状态。 

    $ oc get pv
                     ACCESS   RECLAIM             STORAGE
NAME       CAPACITY  MODES    POLICY   STATUS     CLASS       AGE
local-pv-  500Gi     RWO      Delete   Available  localblock  7m48s
3584969f
local-pv-  500Gi     RWO      Delete   Available  localblock  7m48s
3aee84fa
local-pv-  500Gi     RWO      Delete   Available  localblock  7m48s
644d09ac
local-pv-  500Gi     RWO      Delete   Available  localblock  7m48s
c73cee1