TL;DR

helm repo add openebs https://openebs.github.io/openebs
helm repo update

# 以默认值安装
helm install openebs --namespace openebs openebs/openebs --create-namespace

# 禁用副本存储类型、lvm 本地存储、zfs本地存储，仅保留本地路径存储
helm install openebs --namespace openebs openebs/openebs --set engines.replicated.mayastor.enabled=false --set engines.local.lvm.enabled=false --set engines.local.zfs.enabled=fa
lse --create-namespace
E0311 06:22:00.794754  111105 round_tripper.go:63] CancelRequest not implemented by *kube.RetryingRoundTripper
NAME: openebs
LAST DEPLOYED: Tue Mar 11 06:21:28 2025
NAMESPACE: openebs
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Successfully installed OpenEBS.

Check the status by running: kubectl get pods -n openebs

The default values will install both Local PV and Replicated PV. However,
the Replicated PV will require additional configuration to be fuctional.
The Local PV offers non-replicated local storage using 3 different storage
backends i.e Hostpath, LVM and ZFS, while the Replicated PV provides one replicated highly-available
storage backend i.e Mayastor.

For more information, 
- view the online documentation at https://openebs.io/docs
- connect with an active community on our Kubernetes slack channel.
        - Sign up to Kubernetes slack: https://slack.k8s.io
        - #openebs channel: https://kubernetes.slack.com/messages/openebs

实际使用需充分阅读官方文档。

Local PV Hostpath 用法

定义 StorageClass

以下内容写入 local-hostpath-sc.yaml，默认的 openebs-hostpath 数据存放在主机的 /var/openebs/local 路径下，可以像下面这样自己创建一个。默认使用kubernetes.io/hostname=<node-name> 来标记节点。

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: openebs-local-hostpath
  annotations:
    openebs.io/cas-type: local
    cas.openebs.io/config: |
      - name: StorageType
        value: hostpath
      - name: BasePath
        value: /var/openebs/local
provisioner: openebs.io/local
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumer

PersistentVolumes 可以有多种回收策略，包括 "Retain"、"Recycle" 和 "Delete"。 对于动态配置的 PersistentVolumes 来说，默认回收策略为 "Delete"。 这表示当用户删除对应的 PersistentVolumeClaim 时，动态配置的 volume 将被自动删除。 如果 volume 包含重要数据时，这种自动行为可能是不合适的。 那种情况下，更适合使用 "Retain" 策略。 使用 "Retain" 时，如果用户删除 PersistentVolumeClaim，对应的 PersistentVolume 不会被删除。 相反，它将变为 Released 状态，表示所有的数据可以被手动恢复。

pvc 的迁移可以使用 pv-migrate 或 Velero 进行，实现在主机间迁移。

定义 PVC

local-hostpath-pvc.yaml

kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: local-hostpath-pvc
spec:
  storageClassName: openebs-hostpath
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5G

Pod 使用

local-hostpath-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: hello-local-hostpath-pod
spec:
  volumes:
  - name: local-storage
    persistentVolumeClaim:
      claimName: local-hostpath-pvc
  containers:
  - name: hello-container
    image: busybox
    command:
       - sh
       - -c
       - 'while true; do echo "`date` [`hostname`] Hello from OpenEBS Local PV." >> /mnt/store/greet.txt; sleep $(($RANDOM % 5 + 300)); done'
    volumeMounts:
    - mountPath: /mnt/store
      name: local-storage

清理

kubectl delete pod hello-local-hostpath-pod
kubectl delete pvc local-hostpath-pvc
kubectl delete sc local-hostpath

# 可验证动态创建的 pv 也被删除
kubectl get pv

References

• https://openebs.io
• https://kubernetes.io/zh-cn/docs/concepts/storage/persistent-volumes/