Add example yaml files for deployment and testing

deploy/kubernetes/setup-csi-snapshotter.yaml

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+# This YAML file contains all API objects that are necessary to run external
+# CSI snapshotter.
+#
+# In production, this needs to be in separate files, e.g. service account and
+# role and role binding needs to be created once, while stateful set may
+# require some tuning.
+#
+# In addition, hostpath CSI driver is hardcoded as the CSI driver.
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: csi-snapshotter
+
+---
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: external-snapshotter-runner
+rules:
+  - apiGroups: [""]
+    resources: ["persistentvolumes"]
+    verbs: ["get", "list", "watch", "create", "delete"]
+  - apiGroups: [""]
+    resources: ["persistentvolumeclaims"]
+    verbs: ["get", "list", "watch", "update"]
+  - apiGroups: ["storage.k8s.io"]
+    resources: ["storageclasses"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources: ["events"]
+    verbs: ["list", "watch", "create", "update", "patch"]
+  - apiGroups: [""]
+    resources: ["endpoints"]
+    verbs: ["list", "watch", "create", "update", "delete", "get"]
+  - apiGroups: [""]
+    resources: ["secrets"]
+    verbs: ["get", "list"]
+  - apiGroups: ["snapshot.storage.k8s.io"]
+    resources: ["volumesnapshotclasses"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["snapshot.storage.k8s.io"]
+    resources: ["volumesnapshotcontents"]
+    verbs: ["create", "get", "list", "watch", "update", "delete"]
+  - apiGroups: ["snapshot.storage.k8s.io"]
+    resources: ["volumesnapshots"]
+    verbs: ["get", "list", "watch", "update"]
+  - apiGroups: ["apiextensions.k8s.io"]
+    resources: ["customresourcedefinitions"]
+    verbs: ["create", "list", "watch", "delete"]
+
+---
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: csi-snapshotter-role
+subjects:
+  - kind: ServiceAccount
+    name: csi-snapshotter
+    namespace: default
+roleRef:
+  kind: ClusterRole
+  name: external-snapshotter-runner
+  apiGroup: rbac.authorization.k8s.io
+
+---
+kind: Service
+apiVersion: v1
+metadata:
+  name: csi-snapshotter
+  labels:
+    app: csi-snapshotter
+spec:
+  selector:
+    app: csi-snapshotter
+  ports:
+    - name: dummy
+      port: 12345
+
+---
+kind: StatefulSet
+apiVersion: apps/v1
+metadata:
+  name: csi-snapshotter
+spec:
+  serviceName: "csi-snapshotter"
+  replicas: 1
+  selector:
+    matchLabels:
+      app: csi-snapshotter
+  template:
+    metadata:
+      labels:
+        app: csi-snapshotter
+    spec:
+      serviceAccount: csi-snapshotter
+      containers:
+        - name: csi-provisioner
+          image: xyang105/csi:csi-provisioner
+          args:
+            - "--provisioner=csi-hostpath"
+            - "--csi-address=$(ADDRESS)"
+            - "--connection-timeout=15s"
+          env:
+            - name: ADDRESS
+              value: /csi/csi.sock
+          imagePullPolicy: "IfNotPresent"
+          volumeMounts:
+            - name: socket-dir
+              mountPath: /csi
+        - name: csi-snapshotter
+          image: xyang105/csi:csi-snapshotter
+          args:
+            - "--csi-address=$(ADDRESS)"
+            - "--connection-timeout=15s"
+          env:
+            - name: ADDRESS
+              value: /csi/csi.sock
+          imagePullPolicy: "IfNotPresent"
+          volumeMounts:
+            - name: socket-dir
+              mountPath: /csi
+        - name: hostpath
+          image: xyang105/csi:csi-hostpath
+          args:
+            - "--v=5"
+            - "--endpoint=$(CSI_ENDPOINT)"
+            - "--nodeid=$(KUBE_NODE_NAME)"
+          env:
+            - name: CSI_ENDPOINT
+              value: unix:///csi/csi.sock
+            - name: KUBE_NODE_NAME
+              valueFrom:
+                fieldRef:
+                  apiVersion: v1
+                  fieldPath: spec.nodeName
+          imagePullPolicy: IfNotPresent
+          securityContext:
+            privileged: true
+          volumeMounts:
+            - name: socket-dir
+              mountPath: /csi
+      volumes:
+        - name: socket-dir
+          emptyDir:

examples/kubernetes/pvc.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: hpvc
+spec:
+  storageClassName: csi-hostpath-sc
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi

examples/kubernetes/restore.yaml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: hpvc-restore
+spec:
+  storageClassName: csi-hostpath-sc
+  dataSource:
+    name: new-snapshot-demo 
+    kind: VolumeSnapshot
+    apiGroup: snapshot.storage.k8s.io
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 1Gi

examples/kubernetes/snapshot.yaml

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+apiVersion: snapshot.storage.k8s.io/v1alpha1
+kind: VolumeSnapshot
+metadata:
+  name: new-snapshot-demo
+spec:
+  snapshotClassName: csi-hostpath-snapclass
+  source:
+    name: hpvc
+    kind: PersistentVolumeClaim

examples/kubernetes/snapshotclass.yaml

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+apiVersion: snapshot.storage.k8s.io/v1alpha1
+kind: VolumeSnapshotClass
+metadata:
+  name: csi-hostpath-snapclass
+snapshotter: csi-hostpath

examples/kubernetes/storageclass.yaml

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+apiVersion: storage.k8s.io/v1
+kind: StorageClass
+metadata:
+  name: csi-hostpath-sc
+provisioner: csi-hostpath
+reclaimPolicy: Delete
+volumeBindingMode: Immediate