K8S持久化存储：NFS+StorageClass实现动态供给

部署nfs-provisioner

#NFS Provisioner 是一个自动配置卷程序，它使用现有的和已配置的 NFS 服务器来支持通过持久卷声明动态配置 Kubernetes 持久卷。

以下开始部署nfs-provisioner

注意：本次测试都部署在default namespace下，如果需要部署到其他的ns，需要修改yaml文件中namespace。 （1）创建ServiceAccount、ClusterRole、ClusterRoleBinding等，为nfs-client-provisioner授权

# rbac.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-client-provisioner-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: ["create", "update", "patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-runner
  apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
    # replace with namespace where provisioner is deployed
  namespace: default
rules:
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get", "list", "watch", "create", "update", "patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: default
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

（2）部署nfs-client-provisioner nfs-client-provisioner 是一个 Kubernetes 的简易 NFS 的外部 provisioner，本身不提供 NFS，需要现有的 NFS 服务器提供存储。 注意：地址和目录要改成实际的NFS服务对应配置

# nfs-provisioner.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default  #与RBAC文件中的namespace保持一致
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nfs-client-provisioner
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: nfs-client-provisioner
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: quay.io/external_storage/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: gxf-nfs-storage  #provisioner名称,请确保该名称与 nfs-StorageClass.yaml文件中的provisioner名称保持一致
            - name: NFS_SERVER
              value: 172.16.195.139    #NFS Server IP地址
            - name: NFS_PATH  
              value: /data/k8s    #NFS挂载卷
      volumes:
        - name: nfs-client-root
          nfs:
            server: 172.16.195.139  #NFS Server IP地址
            path: /data/k8s     #NFS 挂载卷

应用上述yaml文件

root@node1:~/mongo_yaml# kubectl apply -f rbac.yaml 
root@node1:~/mongo_yaml# kubectl apply -f nfs-provisioner.yaml 
root@node1:~/mongo_yaml# kubectl get pods
NAME                                      READY   STATUS        RESTARTS   AGE
nfs-client-provisioner-5f5fdb8fbf-jkb6b   1/1     Running       0          46s

创建storageClass

# nfs-StorageClass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
provisioner: gxf-nfs-storage #这里的名称要和provisioner配置文件中的环境变量PROVISIONER_NAME保持一致
reclaimPolicy: Retain # 默认为delete
parameters:
  archiveOnDelete: "true" # false表示pv被删除时，在nfs下面对应的文件夹也会被删除,true正相反

详细说明参考链接：blog.csdn.net/gxf1027/art…