NFS service creates PV resources

To do PV based on NFS service:

Install NFS service and rpcbind service: 1. [root@master yaml] # yum install-y nfs-utils rpcbind # note that NFS service should be installed in all three. 2. [root@master yaml] # vim / etc/exports file add / nfsdata * (rw,sync,no_root_squash) 4. [root@master yaml] # mkdir / nfsdata 5. [root@master yaml] # systemctl start rpcbind 6. [root@master yaml] # systemctl start nfs-server.service 7. [root@master yaml] # showmount-e Export list for master: / nfsdata *

Create a PV resource object:

Vim nfs-pv.yamlapiVersion: v1kind: PersistentVolumemetadata: name: testspec: capacity given by capacity:# storage: access mode supported by 1Gi accessModes:#PV-ReadWriteOnce# here means that persistentVolumeReclaimPolicy: Recycle#pv can only be mounted to a single node in a read-write manner: the recycling policy of storageClassName: nfs# indicates that the name of the storage class defined by storageClassName: nfs# should be the same as the storage class name defined above Path: / nfsdata/pv1# specify the directory of NFS server: 192.168.1." specify the IP execution nfs-pv.yaml file of the NFS server: * * `kubectl apply-f nfs-pv.yaml `* * persistentvolume/test created * * `kubectl get pv` * * NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE test 1Gi RWO Recycle * * Available * * Nfs 7s * * Note here that the STATUS status is Available before it can be used. **

Access modes supported by pv:

ReadWriteOnce: the access mode is that you can only mount to a single node in read-write mode.

ReadWriteMany: the access mode is that you can only mount to multiple nodes in a read-write manner.

ReadOnlyMany: the access mode is that you can only mount to multiple nodes as read-only.

Recycling strategy for PV storage space:

Recycle: automatically clears data.

Retain: requires manual recycling by the administrator.

Delete: dedicated to cloud storage.

The correlation between PV and PVC: through storageClassName and accessModes

Create PVC: vim nfs-pvc.yamlapiVersion: v1kind: PersistentVolumeClaimmetadata: name: testspec: accessModes:-ReadWriteOnce# to define the access mode, which must be consistent with the Pv definition. Resources: requests: storage: 1Gi# request capacity size storageClassName: nfs# storage class name must be consistent with the pv definition.