chore: fix some error in setup

1. add SPDK target setup in README.
2. fix setup_kernel_nvmf_target command error.
3. fix pv.yaml's storageclass name.

Signed-off-by: Meinhard Zhou <zhouenhua@bytedance.com>

README.md

@@ -39,10 +39,15 @@ $ make
 $ ./output/nvmfplugin --endpoint tcp://127.0.0.1:10000 --nodeid CSINode
 ```
 
-### 2.2 Prepare nvmf kernel target
+### 2.2 Prepare nvmf backend target(Kernel or SPDK)
 
+#### Kernel
 Follow [guide to set up kernel target](doc/setup_kernel_nvmf_target.md) to deploy kernel nvmf storage service on localhost.
 
+#### SPDK
+Follow [guide to set up SPDK target](https://spdk.io/doc/nvmf.html) to deploy spdk nvmf storage service on localhost.
+
+You can get the information needed for 3.2 through spdk's `script/rpc.py nvmf_get_subsystem`
 ### 3.1 Get plugin info
 ```
 $ csc identity plugin-info --endpoint tcp://127.0.0.1:10000

doc/setup_kernel_nvmf_target.md

@@ -51,7 +51,7 @@ echo 49153 > /sys/kernel/config/nvmet/ports/1/addr_trsvcid # target port is 4915
 ### 3.4 Link port and namespace
 
 ``` bash
-ln -s /sys/kernel/config/nvmet/subsystems/nqn.2022-08.org.test-nvmf.example/namespaces/ /sys/kernel/config/nvmet/ports/1/subsystems/nqn.2022-08.org.test-nvmf.example
+ln -s /sys/kernel/config/nvmet/subsystems/nqn.2022-08.org.test-nvmf.example/ /sys/kernel/config/nvmet/ports/1/subsystems/nqn.2022-08.org.test-nvmf.example
 ```
 
 ### 3.5 Record the DeviceUUID

examples/kubernetes/example/pv.yaml

@@ -3,7 +3,7 @@ kind: PersistentVolume
 metadata:
   name: csi-nvmf-pv
 spec:
-  storageClassName: cs-nvmf-sc
+  storageClassName: csi-nvmf-sc
   accessModes:
     - ReadWriteOnce
   capacity: