使用nfs制作动态分配存储卷

参考文献：https://yq.aliyun.com/articles/613036

相对于静态存储, 动态存储的优势:

● 管理员无需预先创建大量的PV作为存储资源;

● 静态存储需要用户申请PVC时保证容量和读写类型与预置PV的容量及读写类型完全匹配, 而动态存储则无需如此.

首先创建好nfs服务

1、创建ServiceAccount资源

$ vim serviceaccount.yaml

apiVersion: v1

kind: ServiceAccount

metadata:

  name: nfs-provisioner         # serviceaccount名称，与下文对应

  namespace: testing            # serviceaccount属于名称空间级别的资源

2、创建ClusterRole资源

$ vim clusterrole.yaml

kind: ClusterRole

apiVersion: rbac.authorization.k8s.io/v1

metadata:

  name: nfs-provisioner-runner              # clusterrole名称，clusterrole属于集群级别的资源

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: ["watch", "create", "update", "patch"]

  - apiGroups: [""]

    resources: ["services", "endpoints"]

    verbs: ["get"]

  - apiGroups: ["extensions"]

    resources: ["podsecuritypolicies"]

    resourceNames: ["nfs-provisioner"]

    verbs: ["use"]

3、创建ClusterRoleBinding资源，将clusterrole与serviceaccount二者绑定

$ vim clusterrolebinding.yaml

kind: ClusterRoleBinding

apiVersion: rbac.authorization.k8s.io/v1

metadata:

  name: run-nfs-provisioner               #clusterrolebinding的名称，后文会使用

subjects:

  - kind: ServiceAccount

    name: nfs-provisioner

    namespace: testing

roleRef:

  kind: ClusterRole

  name: nfs-provisioner-runner

  apiGroup: rbac.authorization.k8s.io

4、创建provisioner

$ vim deployment-provisioner.yaml 

kind: Deployment

apiVersion: extensions/v1beta1

metadata:

  name: nfs-client-provisioner

  namespace: testing

spec:

  replicas:

  strategy:

    type: Recreate

  template:

    metadata:

      labels:

        app: nfs-client-provisioner

    spec:

      serviceAccount: nfs-provisioner

      containers:

        - name: nfs-client-provisioner

          image: registry.cn-hangzhou.aliyuncs.com/open-ali/nfs-client-provisioner                            # 此处使用阿里云镜像

          volumeMounts:

            - name: nfs-client-root

              mountPath: /persistentvolumes           #此处写死

          env:

            - name: PROVISIONER_NAME

              value: fuseim.pri/ifs                        # 此处名称自定义，需与下文统一

            - name: NFS_SERVER

              value: 192.168.186.81                     # nfs服务主机

            - name: NFS_PATH

              value: /data/nfs                              # nfs共享路径

      volumes:

        - name: nfs-client-root

          nfs:

            server: 192.168.186.81                    # nfs服务主机

            path: /data/nfs                               # nfs共享路径

5、创建StorageClass资源

$ vim storageclass-nfs.yaml

apiVersion: storage.k8s.io/v1beta1

kind: StorageClass

metadata:

  name: managed-nfs-storage          #存储类的名称，后文使用

provisioner: fuseim.pri/ifs

6、创建pvc资源

$ vim pvc.yaml

apiVersion: v1

kind: PersistentVolumeClaim

metadata:

  name: test-claim                      #存储类的名称

  namespace: testing                  #StorageClass属于名称空间级别资源

  annotations:

    volume.beta.kubernetes.io/storage-class: "managed-nfs-storage"   # 此处注解与之前创建的存储类关联

spec:

  accessModes:

  - ReadWriteMany

  resources:

    requests:

      storage: 1Mi

7、创建pod资源，测试使用情况

$ vim pod.yaml

apiVersion: v1

kind: Pod

metadata:

  name: vol-sc-pod

  namespace: testing

spec:

  containers:

  - name: nginx

    image: nginx:1.12-alpine

    volumeMounts:

    - name: html

      mountPath: /usr/share/nginx/html

  - name: alpine

    image: alpine

    volumeMounts:

    - name: html

      mountPath: /html

    command: ["/bin/sh","-c"]

    args:

    - while true; do

        echo $(hostname) $(date) >> /html/index.html;

        sleep ;

      done

  terminationGracePeriodSeconds:

  volumes:

  - name: html

    persistentVolumeClaim:

      claimName: test-claim              # 此处为pvc的名称

巴特西

使用nfs制作动态分配存储卷

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