3.4.8. PersistentVolume¶
创建持久卷¶
1apiVersion: v1
2kind: PersistentVolume
3metadata:
4 labels:
5 alicloud-pvname: d-2zeetkf4u46w1vj3r2jf
6 name: d-2zeetkf4u46w1vj3r2jf
7spec:
8 accessModes:
9 - ReadWriteOnce # 可以被单个客户端挂载为读写模式, 也可以被多个客户端挂载为只读模式
10 - ReadOnlyMany
11 capacity:
12 storage: 20Gi
13 flexVolume:
14 driver: alicloud/disk
15 fsType: ext4
16 options:
17 volumeId: d-2zeetkf4u46w1vj3r2jf
18 persistentVolumeReclaimPolicy: Retain # 声明被释放后，pv将会被保留(不清理和删除)
19 storageClassName: disk
20status:
21 phase: Available
创建持久卷声明¶
1apiVersion: v1
2kind: PersistentVolumeClaim
3metadata:
4 name: disk-ssd-ruler-eureka0
5 namespace: default
6spec:
7 accessModes:
8 - ReadWriteOnce
9 resources:
10 requests:
11 storage: 2Gi
12 selector:
13 matchLabels:
14 alicloud-pvname: d-2zeetkf4u46w1vj3r2jf
15 storageClassName: disk
16 volumeName: d-2zeetkf4u46w1vj3r2jf
被声明后¶
pvc:
1apiVersion: v1
2kind: PersistentVolumeClaim
3metadata:
4 name: disk-ssd-ruler-eureka0
5 namespace: default
6 annotations:
7 pv.kubernetes.io/provisioned-by: alicloud/disk
8spec:
9 accessModes:
10 - ReadWriteOnce
11 resources:
12 requests:
13 storage: 2Gi
14 selector:
15 matchLabels:
16 alicloud-pvname: d-2zeetkf4u46w1vj3r2jf
17 storageClassName: disk
18 volumeName: d-2zeetkf4u46w1vj3r2jf
19status:
20 phase: Bound
pv:
1apiVersion: v1
2kind: PersistentVolume
3metadata:
4 annotations:
5 pv.kubernetes.io/bound-by-controller: 'yes'
6 labels:
7 alicloud-pvname: d-2zeetkf4u46w1vj3r2jf
8 name: d-2zeetkf4u46w1vj3r2jf
9spec:
10 accessModes:
11 - ReadWriteOnce
12 capacity:
13 storage: 20Gi # 定义PV的大小
14 claimRef:
15 apiVersion: v1
16 kind: PersistentVolumeClaim
17 name: disk-ssd-ruler-eureka0
18 namespace: default
19 resourceVersion: '17424586'
20 uid: 279661cb-c3df-11e9-802c-6a93fcf53165
21 persistentVolumeReclaimPolicy: Delete # 声明被释放后，pv将会被清理、删除
22 storageClassName: disk
23status:
24 phase: Bound
备注
pv 不指定 ns, 但 pvc 需要指定 ns
实操:
1. 直接删除pv(注: 需要先删除 pvc)
$ kubectl delete pv d-2z1 # 执行很长时间但没反应
$ kubectl get pv # d-2z1的STATUS变为Terminating
NAME CAPACITY MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS
d-2z1 20Gi RWO Delete Terminating default/nameB1 alicloud-disk-ssd
d-2z2 20Gi RWO Delete Bound default/nameB0 alicloud-disk-ssd
d-2z3 20Gi RWO Delete Bound default/name0 alicloud-disk-ssd
d-2z4 20Gi RWO Delete Bound default/name1 alicloud-disk-ssd
d-2z5 20Gi RWO Retain Bound default/nameA0 disk
$> kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS
name0 Bound d-2z1 20Gi RWO alicloud-disk-ssd
name1 Bound d-2z2 20Gi RWO alicloud-disk-ssd
nameB0 Bound d-2z3 20Gi RWO alicloud-disk-ssd
nameB1 Bound d-2z4 20Gi RWO alicloud-disk-ssd
nameA0 Bound d-2z5 20Gi RWO disk
2. 删除pv的RECLAIM POLICY为Delete的pvc
$> kubectl delete pvc name0
$> kubectl delete pvc name1
$> kubectl get pvc # pvc删除成功
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS
nameB0 Bound d-2z3 20Gi RWO alicloud-disk-ssd
nameB1 Bound d-2z4 20Gi RWO alicloud-disk-ssd
nameA0 Bound d-2z5 20Gi RWO disk
$ kubectl get pv # pv也同步删除成功（同步阿里云盘也删除成功）
NAME CAPACITY MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS
d-2z3 20Gi RWO Delete Bound default/name0 alicloud-disk-ssd
d-2z4 20Gi RWO Delete Bound default/name1 alicloud-disk-ssd
d-2z5 20Gi RWO Retain Bound default/nameA0 disk
3. 删除pv的RECLAIM POLICY为Retain的pvc
$> kubectl delete pvc nameA0
$> kubectl get pvc # pvc删除成功
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS
name0 Bound d-2z3 20Gi RWO alicloud-disk-ssd
name1 Bound d-2z4 20Gi RWO alicloud-disk-ssd
$ kubectl get pv # pv没有被删除而是置为Released
NAME CAPACITY MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS
d-2z3 20Gi RWO Delete Bound default/name0 alicloud-disk-ssd
d-2z4 20Gi RWO Delete Bound default/name1 alicloud-disk-ssd
d-2z5 20Gi RWO Retain Released default/nameA0 disk
4. 手工指定删除pv
$> kubectl delete pv d-2z5
$ kubectl get pv （同步阿里云盘未删除，需要手工删除）
NAME CAPACITY MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS
d-2z3 20Gi RWO Delete Bound default/name0 alicloud-disk-ssd
d-2z4 20Gi RWO Delete Bound default/name1 alicloud-disk-ssd