k8s版本：v1.19.7
参考官方文档（ 在 Kubernetes 环境中部署 OceanBase 集群-V4.3.0-OceanBase 数据库文档-分布式数据库使用文档）在k8s中部署集群成功并成功连接数据库写入数据，但是在服务器上创建的数据存储目录是随机生成的，当删除集群再次创建后无法加载上次创建集群写入的数据（数据已持久化到磁盘）而是重新随机创建了存储牡蛎，请问如何配置使集群使用固定的存储pvc，实现新集群可以加载以前写入的数据？
如图：
pv、pvc配置：
关键修改1：将回收策略改为 Retain（PV 不被删除）
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: local-path
provisioner: rancher.io/local-path
volumeBindingMode: WaitForFirstConsumer
reclaimPolicy: Retain # 从 Delete 改为 Retain
pv定义
ob-data-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: ob-data-pv
spec:
capacity:
storage: 30Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /home/services/obdata/data # 独立目录，需提前创建
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- yun238
ob-redo-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: ob-redo-pv
spec:
capacity:
storage: 30Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /home/services/obdata/redo # 独立目录，需提前创建
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- yun238
ob-log-pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: ob-log-pv
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /home/services/obdata/log # 独立目录，需提前创建
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- yun238
pvc定义
ob-data-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: ob-data-pvc
namespace: oceanbase # 必须与 OBCluster 同命名空间
spec:
accessModes:
- ReadWriteOnce
storageClassName: local-path
resources:
requests:
storage: 30Gi
volumeName: ob-data-pv # 绑定到固定 PV
ob-redo-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: ob-redo-pvc
namespace: oceanbase
spec:
accessModes:
- ReadWriteOnce
storageClassName: local-path
resources:
requests:
storage: 30Gi
volumeName: ob-redo-pv
ob-log-pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: ob-log-pvc
namespace: oceanbase
spec:
accessModes:
- ReadWriteOnce
storageClassName: local-path
resources:
requests:
storage: 10Gi
volumeName: ob-log-pv
kind: ConfigMap
apiVersion: v1
metadata:
name: local-path-config
namespace: local-path-storage
data:
config.json: |-
{
"nodePathMap":[
{
"node":"yun238",
"paths":["/home/services/obdata"]
},
{
"node":"DEFAULT_PATH_FOR_NON_LISTED_NODES",
"paths":["/home/services/obdata"]
}
]
}
setup: |-
#!/bin/sh
set -eu
mkdir -m 0777 -p "$VOL_DIR" # 保持不变：创建数据目录
关键修改2：禁止删除数据目录（原脚本为 rm -rf “$VOL_DIR”）
teardown: |-
#!/bin/sh
set -eu
echo "Skip deleting volume directory: $VOL_DIR" # 仅输出日志，不删除数据
helperPod.yaml: |-
apiVersion: v1
kind: Pod
metadata:
name: helper-pod
spec:
priorityClassName: system-node-critical
tolerations:
- key: node.kubernetes.io/disk-pressure
operator: Exists
effect: NoSchedule
containers:
- name: helper-pod
image: quay.io/prometheus/busybox:latest
imagePullPolicy: IfNotPresent
obcluster配置：
apiVersion: oceanbase.oceanbase.com/v1alpha1
kind: OBCluster
metadata:
name: obcluster
namespace: oceanbase
annotations:
"oceanbase.oceanbase.com/independent-pvc-lifecycle": "true" #true: 可在删除集群后保留 PVC
# "oceanbase.oceanbase.com/mode": "standalone" 或 "service" #standalone: 使用 127.0.0.1 初始化单节点集群，无法与其他节点通信; service: 为每个 OBServer 创建单独的 K8s Service，用 Service 的 ClusterIP 作为 OBServer 的通讯 IP
# "oceanbase.oceanbase.com/single-pvc": "true" # true: 为每个 OBServer 的 Pod 创建并绑定一个整体的 PVC（默认创建三个）
spec:
clusterName: obcluster
clusterId: 1
userSecrets:
root: sc-sys-root
proxyro: sc-sys-proxyro
monitor: sc-sys-monitor
operator: sc-sys-operator
topology:
- zone: zone1
replica: 1
nodeSelector:
kubernetes.io/hostname: yun238
- zone: zone2
replica: 1
nodeSelector:
kubernetes.io/hostname: yun239
- zone: zone3
replica: 1
nodeSelector:
kubernetes.io/hostname: yun240
observer:
image: quay.io/oceanbase/oceanbase-cloud-native:4.3.5.4-104000042025090916
resource:
cpu: 2
memory: 8Gi
storage:
dataStorage:
storageClass: local-path
size: 30Gi
redoLogStorage:
storageClass: local-path
size: 30Gi
logStorage:
storageClass: local-path
size: 10Gi
# storage:
# # 引用固定 PVC：ob-data-pvc
# dataStorage:
# existingClaimName: ob-data-pvc # 关键：指定已创建的 PVC 名称
# size: 30Gi
# # 引用固定 PVC：ob-redo-pvc
# redoLogStorage:
# existingClaimName: ob-redo-pvc
# size: 30Gi
# # 引用固定 PVC：ob-log-pvc
# logStorage:
# existingClaimName: ob-log-pvc
# size: 10Gi
# storage:
# # Data 存储：通过注解指定固定路径，复用提前创建的 PVC
# dataStorage:
# storageClass: local-path
# size: 30Gi
# annotations:
# rancher.io/local-path: "/home/services/obdata/data" # 与提前创建的 PV 路径一致
# # RedoLog 存储：同理
# redoLogStorage:
# storageClass: local-path
# size: 30Gi
# annotations:
# rancher.io/local-path: "/home/services/obdata/redo"
# # Log 存储：同理
# logStorage:
# storageClass: local-path
# size: 10Gi
# annotations:
# rancher.io/local-path: "/home/services/obdata/log"
monitor:
image: quay.io/oceanbase/obagent:4.2.2-100000042024011120
resource:
cpu: 1
memory: 1Gi
parameters:
- name: system_memory
value: 2G
- name: obconfig_url
value: 'http://svc-ob-configserver.oceanbase.svc:8080/services?Action=ObRootServiceInfo&ObCluster=obcluster'