K8s：动态存储PV+PVC+底层NFS

动态存储PV+PVC

动态实现PC+PVC、存储卷

1、简单授权

apiVersion: v1
kind: Namespace
metadata:
  name: nfs				####名称空间
---
apiVersion: v1
kind: ServiceAccount			###账号
metadata:
  name: nfs-client-provisioner			###NFS提供者
  # replace with namespace where provisioner is deployed
  namespace: nfs
---
kind: ClusterRole			###集群角色
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-client-provisioner-runner
rules:									###角色权限
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
  - 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: nfs
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: nfs
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
  # replace with namespace where provisioner is deployed
  namespace: nfs
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: nfs
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

2、创建存储类、定义存储类

​ 存储类寻找提供者、然后由提供者帮你创建存储目录

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: managed-nfs-storage
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner # or choose another name, must match deployment's env PROVISIONER_NAME'
reclaimPolicy: Retain #PV的删除策略，默认为delete，删除PV后立即删除NFS server的数据
mountOptions:
  #- vers=4.1 #containerd有部分参数异常（云环境需要指定为3版本）
  #- noresvport #告知NFS客户端在重新建立网络连接时，使用新的传输控制协议源端口（断网后重连）
  - noatime #访问文件时不更新文件inode中的时间戳，高并发环境可提高性能
parameters:
  #mountOptions: "vers=4.1,noresvport,noatime"
  archiveOnDelete: "true"  #删除pod时保留pod数据，默认为false时为不保留数据 

3、创建NFS

注意：启动可能会慢、需要拉取镜像、需要手动创建namespace（nfs）

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: nfs
spec:
  replicas: 1
  strategy: #部署策略
    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: k8s.gcr.io/sig-storage/nfs-subdir-external-provisioner:v4.0.2 
          image: registry.cn-qingdao.aliyuncs.com/zhangshijie/nfs-subdir-external-provisioner:v4.0.2
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: k8s-sigs.io/nfs-subdir-external-provisioner
            - name: NFS_SERVER
              value: 10.0.0.206
            - name: NFS_PATH
              value: /data/volumes
      volumes:
        - name: nfs-client-root
          nfs:
            server: 10.0.0.206
            path: /data/volumes

4、创建PVC

创建好之后、会自动创建PV、（ 也可以设置成默认存储类 ）

# Test PVC
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: myserver-myapp-dynamic-pvc
  namespace: myserver
spec:
  storageClassName: managed-nfs-storage #调用的storageclass 名称
  accessModes:
    - ReadWriteMany #访问权限
  resources:
    requests:
      storage: 500Mi #空间大小

5、创建WEB服务

kind: Deployment
#apiVersion: extensions/v1beta1
apiVersion: apps/v1
metadata:
  labels:
    app: myserver-myapp
  name: myserver-myapp-deployment-name
  namespace: myserver
spec:
  replicas: 1
  selector:
    matchLabels:
      app: myserver-myapp-frontend
  template:
    metadata:
      labels:
        app: myserver-myapp-frontend
    spec:
      containers:
        - name: myserver-myapp-container
          image: nginx:1.20.0
          #imagePullPolicy: Always
          volumeMounts:
          - mountPath: "/usr/share/nginx/html/statics"
            name: statics-datadir
      volumes:
        - name: statics-datadir
          persistentVolumeClaim:
            claimName: myserver-myapp-dynamic-pvc

---
kind: Service
apiVersion: v1
metadata:
  labels:
    app: myserver-myapp-service
  name: myserver-myapp-service-name
  namespace: myserver
spec:
  type: NodePort
  ports:
  - name: http
    port: 80
    targetPort: 80
    nodePort: 30080
  selector:
    app: myserver-myapp-frontend

6、查看

[root@k8s-31:kubectl  get pv
[root@k8s-31:kubectl  get pvc  -A
[root@k8s-31:kubectl  get pvc   -n  myserver

####查看PV绑定的具体底层存储目录
[root@k8s-31:/data/pv-dynamic-nfs]# kubectl  get pv pvc-65fad161-785b-493c-a3c2-b9bb28566d6e  -o yaml

7、删除存储类

5、先删除pod文件
4、删除PVC文件
3、删除PV（指定PV）
kubectl  delete pv  pv_name

最后全部删除、（NFS、存储类、授权角色）