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: 192.168.1.205 NFSPATH: /nfs/top storageLimit: "200" storageUsed: "0" type: NFS creationTimestamp: 2020-03-10T03:18:57Z name: default parameters: 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 the object below. Lines beginning with a ‘#‘ will be ignored, # and an empty file will abort the edit. If an error occurs while saving this file will 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-03-24 namespace: leijun-mysql spec: accessModes: - ReadWriteMany dataSource: null resources: 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 the object below. Lines beginning with a ‘#‘ will be ignored, # and an empty file will abort the edit. If an error occurs while saving this file will 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: NFS name: default parameters: 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-03-24 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-03-24 namespace: leijun-mysql resourceVersion: "7643003" selfLink: /api/v1/namespaces/leijun-mysql/persistentvolumeclaims/comom-store-column-03-24 uid: 24fc01a0-6d9b-11ea-9107-b8ca3a62236c spec: accessModes: - ReadWriteMany dataSource: null resources: 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-03-24 edited [root@192 ~]#
原文：https://www.cnblogs.com/zphqq/p/13330732.html