Improves the README.md for nfs-client

This commit elaborates on how to deploy nfs-client as well as modify and
doing changes to the files before said deployment, updating the
README.md to make deployment easier.

(cherry picked from commit e2bee920ee)

README.md

@@ -1,50 +1,106 @@
-# kubernetes nfs-client-provisioner
+# Kubernetes NFS-Client Provisioner
 
 [![Docker Repository on Quay](https://quay.io/repository/external_storage/nfs-client-provisioner/status "Docker Repository on Quay")](https://quay.io/repository/external_storage/nfs-client-provisioner)
 
-- pv provisioned as ${namespace}-${pvcName}-${pvName}
-- pv recycled as archieved-${namespace}-${pvcName}-${pvName}
 
-# deploy
+`nfs-client` is an automatic provisioner that used your *already configured* NFS server, automatically creating Persistent Volumes.
-- modify and deploy `deploy/deployment.yaml`
-- modify and deploy `deploy/class.yaml`
 
-## ARM based
+- Persistent volumes are provisioned as ${namespace}-${pvcName}-${pvName}
-To deploy on ARM based (Raspberry PI) use `deploy/deployment-arm.yaml` instead of `deploy/deployment.yaml`
+- Persistent volumes which are recycled as archieved-${namespace}-${pvcName}-${pvName}
 
-# authorization
+# How to deploy nfs-client to your cluster.
 
-If your cluster has RBAC enabled or you are running OpenShift you must
+To note, you must *already* have an NFS Server.
-authorize the provisioner. If you are in a namespace/project other than
-"default" either edit `deploy/auth/clusterrolebinding.yaml` or edit the `oadm
-policy` command accordingly.
 
-## RBAC
+1. Editing:
-```console
+
-$ kubectl create -f deploy/auth/serviceaccount.yaml
+Note: To deploy to an ARM-based environment, use: `deploy/deployment-arm.yaml` instead, otherwise use `deploy/deployment.yaml`.
-serviceaccount "nfs-client-provisioner" created
+Modify `deploy/deployment.yaml` and change the values to your own NFS server:
-$ kubectl create -f deploy/auth/clusterrole.yaml
+
-clusterrole "nfs-client-provisioner-runner" created
+
-$ kubectl create -f deploy/auth/clusterrolebinding.yaml
+```yaml
-clusterrolebinding "run-nfs-client-provisioner" created
+          env:
-$ kubectl patch deployment nfs-client-provisioner -p '{"spec":{"template":{"spec":{"serviceAccount":"nfs-client-provisioner"}}}}'
+            - name: PROVISIONER_NAME
+              value: fuseim.pri/ifs
+            - name: NFS_SERVER
+              value: 10.10.10.60
+            - name: NFS_PATH
+              value: /ifs/kubernetes
+      volumes:
+        - name: nfs-client-root
+          nfs:
+            server: 10.10.10.60
+            path: /ifs/kubernetes
 ```
 
-## OpenShift
+Modify `deploy/class.yaml` to match the same value indicated by `PROVISIONER_NAME`:
-```console
+
-$ oc create -f deploy/auth/serviceaccount.yaml
+```yaml
+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: managed-nfs-storage
+provisioner: fuseim.pri/ifs # or choose another name, must match deployment's env PROVISIONER_NAME'
+```
+
+2. Authorization
+
+If your cluster has RBAC enabled or you are running OpenShift you must authorize the provisioner. If you are in a namespace/project other than "default" either edit `deploy/auth/clusterrolebinding.yaml` or edit the `oadm policy` command accordingly.
+
+Kubernetes:
+
+```sh
+$ kubectl create -f deploy/auth/serviceaccount.yaml -f deploy/auth/clusterrole.yaml -f deploy/auth/clusterrolebinding.yaml
+serviceaccount "nfs-client-provisioner" created
+clusterrole "nfs-client-provisioner-runner" created
+clusterrolebinding "run-nfs-client-provisioner" created
+```
+
+OpenShift:
+
+```sh
+$ oc create -f deploy/auth/openshift-clusterrole.yaml -f deploy/auth/serviceaccount.yaml
 serviceaccount "nfs-client-provisioner" created
-$ oc create -f deploy/auth/openshift-clusterrole.yaml
 clusterrole "nfs-client-provisioner-runner" created
 $ oadm policy add-scc-to-user hostmount-anyuid system:serviceaccount:default:nfs-client-provisioner
 $ oadm policy add-cluster-role-to-user nfs-client-provisioner-runner system:serviceaccount:default:nfs-client-provisioner
-$ oc patch deployment nfs-client-provisioner -p '{"spec":{"template":{"spec":{"serviceAccount":"nfs-client-provisioner"}}}}'
 ```
 
-# test
+3. Finally, test your environment!
-- `kubectl create -f deploy/test-claim.yaml`
+
-- `kubectl create -f deploy/test-pod.yaml`
+Now we'll test your NFS provisioner.
-- check the folder and file "SUCCESS" created
+
-- `kubectl delete -f deploy/test-pod.yaml`
+Deploy:
-- `kubectl delete -f deploy/test-claim.yaml`
+
-- check the folder renamed to `archived-???`
+```sh
+$ kubectl create -f deploy/test-claim.yaml -f deploy/test-pod.yaml
+```
+
+Now check your NFS Server for the file `SUCCESS`.
+
+```sh
+kubectl delete -f deploy/test-pod.yaml -f deploy/test-claim.yaml
+```
+
+Now check the folder renamed to `archived-???`.
+
+4. Deploying your own PersistentVolumeClaim
+
+To deploy your own PVC, make sure that you have the correct `storage-class` as indicated by your `deploy/class.yaml` file.
+
+For example:
+
+```yaml
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: test-claim
+  annotations:
+    volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"
+spec:
+  accessModes:
+    - ReadWriteMany
+  resources:
+    requests:
+      storage: 1Mi
+```