最开始的10g太小了，现在想扩容pv空间

1、kubernetes 1.11版本中开始支持pvc创建后的扩容

先查看storageclass是否配置了动态扩容，主要看storageclass是否存在allowVolumeExpansion字段

[root@192 ~]# kubectl get storageclass default -oyaml

apiVersion: storage.k8s.io/v1

kind: StorageClass

metadata:

annotations:

NFSADDR:192.168.1.205NFSPATH:/nfs/top

storageLimit:"200"storageUsed:"0"type: NFS

creationTimestamp:2020-03-10T03:18:57Z

name: defaultparameters:

archiveOnDelete:"false"provisioner: nfs-client-provisioner-default

reclaimPolicy: Delete

volumeBindingMode: Immediate

[root@192 ~]#

可以看到并没有allowVolumeExpansion，此时是不支持动态扩容的，可以扩一下测试看看

[root@192 ~]# kubectl edit pvc -n leijun-mysql comom-store-column-03-24# Please edit theobject below. Lines beginning with a '#'will be ignored,

# and an emptyfile will abort the edit. If an error occurs while saving this filewill be

# reopened with the relevant failures.

#

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

annotations:

pv.kubernetes.io/bind-completed: "yes"pv.kubernetes.io/bound-by-controller: "yes"volume.beta.kubernetes.io/storage-class: default

volume.beta.kubernetes.io/storage-provisioner: nfs-client-provisioner-default

creationTimestamp:2020-03-24T06:46:09Z

finalizers:- kubernetes.io/pvc-protection

labels:

app/service-leijun-mysql: service-leijun-mysql

harmonycloud.cn/type: storage

nephele/user: admin

name: comom-store-column-03-24namespace: leijun-mysqlspec:

accessModes:-ReadWriteMany

dataSource:nullresources:

requests:

storage: 50Gi

volumeName: pvc-24fc01a0-6d9b-11ea-9107-b8ca3a62236c

status:

accessModes:-ReadWriteMany

capacity:

storage: 10Gi

phase: Bound"/tmp/kubectl-edit-fkm33.yaml" 38L, 1180C written

error: persistentvolumeclaims"comom-store-column-03-24" could not be patched: persistentvolumeclaims "comom-store-column-03-24"is forbidden: only dynamically provisioned pvc can be resized and the storageclass that provisions the pvc must support resize

You can run `kubectl replace-f /tmp/kubectl-edit-fkm33.yaml` to try this update again.

[root@192 ~]#

kubectl edit pvc -n leijun-mysql comom-store-column-03-24修改storage 字段再保存，报错了，表示不支持动态扩容

2、给storageclass添加allowVolumeExpansion字段

[root@192 ~]# kubectl edit storageclass default

# Please edit theobject below. Lines beginning with a '#'will be ignored,

# and an emptyfile will abort the edit. If an error occurs while saving this filewill be

# reopened with the relevant failures.

#

apiVersion: storage.k8s.io/v1

kind: StorageClass

metadata:

annotations:

NFSADDR:192.168.*。*NFSPATH:/nfs/top

storageLimit:"200"storageUsed:"0"type: NFSname: defaultparameters:

archiveOnDelete:"false"provisioner: nfs-client-provisioner-default

reclaimPolicy: Delete

volumeBindingMode: Immediate

allowVolumeExpansion:true #增加该字段表示允许动态扩容

~

~

~

~

~

~

~

"/tmp/kubectl-edit-x0fyj.yaml" 24L, 738C written

storageclass.storage.k8s.io/default edited

[root@192 ~]#

3、再次修改pvc   spec.resources.requests.storage字段

[root@192 ~]# kubectl edit pvc -n leijun-mysql comom-store-column-03-24annotations:

pv.kubernetes.io/bind-completed: "yes"pv.kubernetes.io/bound-by-controller: "yes"volume.beta.kubernetes.io/storage-class: default

volume.beta.kubernetes.io/storage-provisioner: nfs-client-provisioner-default

creationTimestamp:2020-03-24T06:46:09Z

finalizers:- kubernetes.io/pvc-protection

labels:

app/service-leijun-mysql: service-leijun-mysql

harmonycloud.cn/type: storage

nephele/user: admin

name: comom-store-column-03-24namespace: leijun-mysql

resourceVersion:"7643003"selfLink:/api/v1/namespaces/leijun-mysql/persistentvolumeclaims/comom-store-column-03-24uid: 24fc01a0-6d9b-11ea-9107-b8ca3a62236c

spec:

accessModes:-ReadWriteMany

dataSource:nullresources:

requests:

storage: 30Gi

volumeName: pvc-24fc01a0-6d9b-11ea-9107-b8ca3a62236c

status:

accessModes:-ReadWriteMany

capacity:

storage: 10Gi

phase: Bound"/tmp/kubectl-edit-mibh7.yaml" 38L, 1180C written

persistentvolumeclaim/comom-store-column-03-24edited

[root@192 ~]#