Configuring NFS storage

Reference: See section 9.1. Configuring the Block Storage service with a generic NFS back end from Deploying Red Hat OpenStack Platform 18.0 Development Preview 3 on Red Hat OpenShift Container Platform guide.

Create an NFS share for cinder
```
mkdir /nfs/cinder
chmod 777 /nfs/cinder
```

Create directories for NFS persistent volumes.

mkdir /nfs/pv6
mkdir /nfs/pv7
mkdir /nfs/pv8
mkdir /nfs/pv9
mkdir /nfs/pv10
mkdir /nfs/pv11
chmod 777 /nfs/pv*

Configure NFS storage class

Use below sample configuration to create nfs sorage class:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: nfs
provisioner: kubernetes.io/no-provisioner
reclaimPolicy: Delete

Use below sample configuration to create persistent volume of type NFS

apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-pv1
spec:
  accessModes:
  - ReadWriteOnce
  - ReadWriteMany
  capacity:
    storage: 100Gi
  nfs:
    path: /nfs/pv1
    server: 192.168.123.100
  persistentVolumeReclaimPolicy: Delete
  storageClassName: nfs
  volumeMode: Filesystem

Create copies of the above block for PersistentVolume.
Use the simila block for creating different physicle volumes.
Change the name and the path accordingly.
You may add your configuration for creation of nfs StorageClass and PersistentVolumes in one file.
```
vi nfs-storage.yaml
```

Apply the nfs storage configuration.
```
oc apply -f nfs-storage.yaml
```

Reference: 9.1.1. Creating the NFS server connection secret

Prepare the nfs cinder configuration file as below:

cat >> nfs-cinder-conf << EOF
[nfs]
nas_host=192.168.123.100
nas_share_path=/nfs/cinder
EOF

Prepare the secret to place the NFS server connection used by Cinder.

oc create secret generic cinder-nfs-config --from-file=nfs-cinder-conf

Prepare the glance configuration file as below:

cat >> glance-conf << EOF
[default_backend]
cinder_store_user_name = glance
cinder_store_password = openstack
cinder_store_project_name = service[root@ocp4-bastion demo-lab]#
EOF

Prepare the secret to place the server connection used by Glance.

oc create secret generic glance-cinder-config --from-file=glance-conf