spdk/example: add example manifests

Signed-off-by: Derek Su <derek.su@suse.com>

examples/spdk/pod_with_pvc.yaml

@@ -0,0 +1,40 @@
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: longhorn-volv-pvc
+  namespace: default
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: longhorn-spdk
+  resources:
+    requests:
+      storage: 2Gi
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: volume-test
+  namespace: default
+spec:
+  restartPolicy: Always
+  containers:
+  - name: volume-test
+    image: nginx:stable-alpine
+    imagePullPolicy: IfNotPresent
+    livenessProbe:
+      exec:
+        command:
+          - ls
+          - /data/lost+found
+      initialDelaySeconds: 5
+      periodSeconds: 5
+    volumeMounts:
+    - name: volv
+      mountPath: /data
+    ports:
+    - containerPort: 80
+  volumes:
+  - name: volv
+    persistentVolumeClaim:
+      claimName: longhorn-volv-pvc

examples/spdk/storageclass.yaml

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+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: longhorn-spdk
+provisioner: driver.longhorn.io
+allowVolumeExpansion: true
+reclaimPolicy: Delete
+volumeBindingMode: Immediate
+parameters:
+  # backup, backingImage and snapshot related parameters are not supported in SPDK preview stage
+  numberOfReplicas: "2"
+  staleReplicaTimeout: "2880"
+  fsType: "ext4"
+  backendStoreDriver: "spdk"
+#  mkfsParams: "-I 256 -b 4096 -O ^metadata_csum,^64bit"
+#  nodeSelector: "storage,fast"
+#  recurringJobSelector: '[{"name":"snap-group", "isGroup":true},
+#                          {"name":"backup", "isGroup":false}]'
+#  fromBackup: ""
+#  backingImage: "bi-test"
+#  backingImageDataSourceType: "download"
+#  backingImageDataSourceParameters: '{"url": "https://backing-image-example.s3-region.amazonaws.com/test-backing-image"}'
+#  backingImageChecksum: "SHA512 checksum of the backing image"
+#  unmapMarkSnapChainRemoved: "ignored"
+#  diskSelector: "ssd,fast"
+
+