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K8S使用NFS动态-csi-nfs-driver

飞熊 • • 技术随笔 • 阅读 317

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K8S使用NFS动态(csi-nfs-driver)

nfs服务器：

[root@localhost ~]#yum install nfs-utils rpcbind -y
[root@localhost ~]#mkdir -p /data/nfs/
[root@localhost ~]#chmod 755 /data/nfs/
[root@localhost ~]#vim /etc/exports
/data/nfs/    *(insecure,rw,sync,no_root_squash,no_all_squash)    //nfs挂载目录；*：挂载地址(*代表所有)
[root@localhost ~]#systemctl start nfs
[root@localhost ~]#systemctl start rpcbind

[root@k8s-node1 ~]#yum install nfs-utils rpcbind -y  //k8snode节点都需安装

注：关闭防火墙和防护

k8s-master部署:

rbac-csi-nfs-controller.yaml

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: csi-nfs-controller-sa
  namespace: kube-system
 
---
 
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-external-provisioner-role
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: ["get", "list", "watch", "create", "update", "patch"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["csinodes"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["coordination.k8s.io"]
    resources: ["leases"]
    verbs: ["get", "list", "watch", "create", "update", "patch"]
---
 
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-csi-provisioner-binding
subjects:
  - kind: ServiceAccount
    name: csi-nfs-controller-sa
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: nfs-external-provisioner-role
  apiGroup: rbac.authorization.k8s.io

csi-nfs-driverinfo.yaml:

---
apiVersion: storage.k8s.io/v1beta1
kind: CSIDriver
metadata:
  name: nfs.csi.k8s.io
spec:
  attachRequired: false
  volumeLifecycleModes:
    - Persistent
  podInfoOnMount: true

csi-nfs-node.yaml：

---
# This YAML file contains driver-registrar & csi driver nodeplugin API objects
# that are necessary to run CSI nodeplugin for nfs
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: csi-nfs-node
  namespace: kube-system
spec:
  selector:
    matchLabels:
      app: csi-nfs-node
  template:
    metadata:
      labels:
        app: csi-nfs-node
    spec:
      hostNetwork: true  # original nfs connection would be broken without hostNetwork setting
      dnsPolicy: ClusterFirstWithHostNet
      containers:
        - name: liveness-probe
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/livenessprobe:v2.1.0
          args:
            - --csi-address=/csi/csi.sock
            - --probe-timeout=3s
            - --health-port=29653
            - --v=5
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
          resources:
            limits:
              cpu: 100m
              memory: 100Mi
            requests:
              cpu: 10m
              memory: 20Mi
        - name: node-driver-registrar
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/csi-node-driver-registrar:v2.0.1
          lifecycle:
            preStop:
              exec:
                command: ["/bin/sh", "-c", "rm -rf /registration/csi-nfsplugin /registration/csi-nfsplugin-reg.sock"]
          args:
            - --v=5
            - --csi-address=/csi/csi.sock
            - --kubelet-registration-path=/var/lib/kubelet/plugins/csi-nfsplugin/csi.sock
          env:
            - name: KUBE_NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: registration-dir
              mountPath: /registration
        - name: nfs
          securityContext:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/nfsplugin:amd64-linux-canary
          args:
            - "-v=5"
            - "--nodeid=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
          env:
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CSI_ENDPOINT
              value: unix:///csi/csi.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: pods-mount-dir
              mountPath: /var/lib/kubelet/pods
              mountPropagation: "Bidirectional"
      volumes:
        - name: socket-dir
          hostPath:
            path: /var/lib/kubelet/plugins/csi-nfsplugin
            type: DirectoryOrCreate
        - name: pods-mount-dir
          hostPath:
            path: /var/lib/kubelet/pods
            type: Directory
        - hostPath:
            path: /var/lib/kubelet/plugins_registry
            type: Directory
          name: registration-dir

csi-nfs-controller.yaml：

---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: csi-nfs-controller
  namespace: kube-system
spec:
  replicas: 2
  selector:
    matchLabels:
      app: csi-nfs-controller
  template:
    metadata:
      labels:
        app: csi-nfs-controller
    spec:
      serviceAccountName: csi-nfs-controller-sa
      nodeSelector:
        kubernetes.io/os: linux
      priorityClassName: system-cluster-critical
      tolerations:
        - key: "node-role.kubernetes.io/master"
          operator: "Equal"
          value: "true"
          effect: "NoSchedule"
      containers:
        - name: csi-provisioner
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/csi-provisioner:v2.0.4
          args:
            - "-v=5"
            - "--csi-address=$(ADDRESS)"
            - "--leader-election"
          env:
            - name: ADDRESS
              value: /csi/csi.sock
          volumeMounts:
            - mountPath: /csi
              name: socket-dir
          resources:
            limits:
              cpu: 100m
              memory: 100Mi
            requests:
              cpu: 10m
              memory: 20Mi
        - name: liveness-probe
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/livenessprobe:v2.1.0
          args:
            - --csi-address=/csi/csi.sock
            - --probe-timeout=3s
            - --health-port=29652
            - --v=5
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
          resources:
            limits:
              cpu: 100m
              memory: 100Mi
            requests:
              cpu: 10m
              memory: 20Mi
        - name: nfs
          image: registry.cn-hangzhou.aliyuncs.com/imagesfromgoogle/nfsplugin:amd64-linux-canary
          securityContext:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
          imagePullPolicy: IfNotPresent
          args:
            - "-v=5"
            - "--nodeid=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
          env:
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CSI_ENDPOINT
              value: unix:///csi/csi.sock
          volumeMounts:
            - name: pods-mount-dir
              mountPath: /var/lib/kubelet/pods
              mountPropagation: "Bidirectional"
            - mountPath: /csi
              name: socket-dir
          resources:
            limits:
              cpu: 200m
              memory: 200Mi
            requests:
              cpu: 10m
              memory: 20Mi
      volumes:
        - name: pods-mount-dir
          hostPath:
            path: /var/lib/kubelet/pods
            type: Directory
        - name: socket-dir
          emptyDir: {}

storageclass-nfs.yaml ,修改以下的nfs的地址和目录

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: nfs.csi.k8s.io
parameters:
  server: 20.0.0.21
  share: /data/nfs/
reclaimPolicy: Delete
volumeBindingMode: WaitForFirstConsumer
mountOptions:
  - vers=3
  - noresvport
[root@k8s-master1 ~]#kubectl apply -f csi-nfs-driverinfo.yaml
[root@k8s-master1 ~]#kubectl apply -f csi-nfs-node.yaml
[root@k8s-master1 ~]#kubectl apply -f csi-nfs-controller.yaml
[root@k8s-master1 ~]#kubectl apply -f storageclass-nfs.yaml

测试创建pod，使用local-storage动态创建pvc

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  serviceName: "nginx"
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /usr/share/nginx/html
  volumeClaimTemplates:
  - metadata:
      name: www
    spec:
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 5Gi
      storageClassName: local-storage
[root@k8s-master1 ~]#kubectl apply -f storageclass-nfs.yaml
[root@k8s-master1 ~]#kubectl get pvc
NAME        STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS    AGE
www-web-0   Bound    pvc-c2ce6bec-0f16-4984-9e07-fb6fa876abbf   5Gi        RWO            local-storage   3s
[root@k8s-master1 ~]#kubectl get pv
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM               STORAGECLASS    REASON   AGE
pvc-c2ce6bec-0f16-4984-9e07-fb6fa876abbf   5Gi        RWO            Delete           Bound    default/www-web-0   local-storage            4s
[root@k8s-master1 ~]#kubectl get pod
NAME    READY   STATUS    RESTARTS   AGE
web-0   1/1     Running   0          43s
web-1   1/1     Running   0          25s

nfs服务器查看挂载

[root@localhost ~]#cd /data/nfs/
[root@localhost nfs]#ll
总用量 0
drwxr-xr-x. 2 root root 6 12月  9 16:40 pvc-a6b65499-8acf-4c81-9cae-2df3acbeadec
drwxr-xr-x. 2 root root 6 12月  9 16:39 pvc-c2ce6bec-0f16-4984-9e07-fb6fa876abbf

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文章由极客之音整理，本文链接：https://www.bmabk.com/index.php/post/160321.html

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