csi-hostpath-plugin.yaml

# Service defined here, plus serviceName below in StatefulSet,
# are needed only because of condition explained in
# https://github.com/kubernetes/kubernetes/issues/69608

kind: Service
apiVersion: v1
metadata:
  name: csi-hostpathplugin
  labels:
    app: csi-hostpathplugin
spec:
  selector:
    app: csi-hostpathplugin
  ports:
    - name: dummy
      port: 12345
---
kind: StatefulSet
apiVersion: apps/v1
metadata:
  name: csi-hostpathplugin
spec:
  serviceName: "csi-hostpathplugin"
  # One replica only:
  # Host path driver only works when everything runs
  # on a single node. We achieve that by starting it once and then
  # co-locate all other pods via inter-pod affinity
  replicas: 1
  selector:
    matchLabels:
      app: csi-hostpathplugin
  template:
    metadata:
      labels:
        app: csi-hostpathplugin
    spec:
      containers:
        - name: node-driver-registrar
          image: k8s.gcr.io/sig-storage/csi-node-driver-registrar:v2.0.1
          args:
            - --v=5
            - --csi-address=/csi/csi.sock
            - --kubelet-registration-path=/var/lib/kubelet/plugins/csi-hostpath/csi.sock
          securityContext:
            # This is necessary only for systems with SELinux, where
            # non-privileged sidecar containers cannot access unix domain socket
            # created by privileged CSI driver container.
            privileged: true
          env:
            - name: KUBE_NODE_NAME
              valueFrom:
                fieldRef:
                  apiVersion: v1
                  fieldPath: spec.nodeName
          volumeMounts:
          - mountPath: /csi
            name: socket-dir
          - mountPath: /registration
            name: registration-dir
          - mountPath: /csi-data-dir
            name: csi-data-dir

        - name: hostpath
          image: k8s.gcr.io/sig-storage/hostpathplugin:v1.4.0
          args:
            - "--drivername=hostpath.csi.k8s.io"
            - "--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
          securityContext:
            privileged: true
          ports:
          - containerPort: 9898
            name: healthz
            protocol: TCP
          livenessProbe:
            failureThreshold: 5
            httpGet:
              path: /healthz
              port: healthz
            initialDelaySeconds: 10
            timeoutSeconds: 3
            periodSeconds: 2
          volumeMounts:
            - mountPath: /csi
              name: socket-dir
            - mountPath: /var/lib/kubelet/pods
              mountPropagation: Bidirectional
              name: mountpoint-dir
            - mountPath: /var/lib/kubelet/plugins
              mountPropagation: Bidirectional
              name: plugins-dir
            - mountPath: /csi-data-dir
              name: csi-data-dir
            - mountPath: /dev
              name: dev-dir
        - name: liveness-probe
          volumeMounts:
          - mountPath: /csi
            name: socket-dir
          image: k8s.gcr.io/sig-storage/livenessprobe:v2.1.0
          args:
          - --csi-address=/csi/csi.sock
          - --health-port=9898

      volumes:
        - hostPath:
            path: /var/lib/kubelet/plugins/csi-hostpath
            type: DirectoryOrCreate
          name: socket-dir
        - hostPath:
            path: /var/lib/kubelet/pods
            type: DirectoryOrCreate
          name: mountpoint-dir
        - hostPath:
            path: /var/lib/kubelet/plugins_registry
            type: Directory
          name: registration-dir
        - hostPath:
            path: /var/lib/kubelet/plugins
            type: Directory
          name: plugins-dir
        - hostPath:
            # 'path' is where PV data is persisted on host.
            # using /tmp is also possible while the PVs will not available after plugin container recreation or host reboot
            path: /var/lib/csi-hostpath-data/
            type: DirectoryOrCreate
          name: csi-data-dir
        - hostPath:
            path: /dev
            type: Directory
          name: dev-dir