|NO.Z.00249|——————————|CloudNative|——|KuberNetes&存储进阶.V15|——|Ceph.v09|ceph测试|块存储扩容|

一、扩容块存储

### --- 扩容步骤类似，找到第五章创建PVC，直接edit即可
~~~     扩容块存储的空间为30Gi

[root@k8s-master01 cephfs]# kubectl  edit pvc mysql-pv-claim
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 30Gi
  storageClassName: rook-ceph-block 

### --- 查看扩容结果

[root@k8s-master01 cephfs]# kubectl get pvc
NAME             STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
mysql-pv-claim   Bound    pvc-a22e54cf-9d96-4070-b3a7-90a2fa73c249   20Gi       RWO            rook-ceph-block   55m

~~~     # 可以看到此时pvc并没有扩容，但是pv已经扩容：

[root@k8s-master01 cephfs]# kubectl  get pv  | grep  default/mysql-pv-claim
pvc-a22e54cf-9d96-4070-b3a7-90a2fa73c249   30Gi       RWO            Delete           Bound    default/mysql-pv-claim   rook-ceph-block            55m

~~~     # 也可以看到ceph dashboard的image也完成了扩容，但是pvc和pod里面的状态会有延迟，大概等待5-10分钟后，即可完成扩容：

[root@k8s-master01 cephfs]# kubectl get po -owide
NAME                               READY   STATUS    RESTARTS   AGE    IP               NODE           NOMINATED NODE   READINESS GATES
busybox                            1/1     Running   1          118m   172.17.125.1     k8s-node01     <none>           <none>
wordpress-mysql-6965fc8cc8-fvtrt   1/1     Running   0          57m    172.25.244.207   k8s-master01   <none>           <none>
[root@k8s-master01 cephfs]# kubectl exec -ti wordpress-mysql-6965fc8cc8-fvtrt -- df -Th
Filesystem     Type     Size  Used Avail Use% Mounted on
/dev/rbd0      ext4      30G  160M   30G   1% /var/lib/mysql   

### --- 大概过去5分钟左右，再次查看pvc已经扩容成功

[root@k8s-master01 cephfs]# kubectl get pvc
NAME             STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS      AGE
mysql-pv-claim   Bound    pvc-a22e54cf-9d96-4070-b3a7-90a2fa73c249   30Gi       RWO            rook-ceph-block   58m

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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