k8s部署基于nfs的StorageClass

参考：https://www.cnblogs.com/jojoword/p/12341128.html

storageclass相当于是一个动态的存储,即每个pod需要多少容量,直接在配置资源清单中声明即可;但是nfs默认是不支持storageclass动态存储的.

nfs本身不支持动态存储,而我们找了一个能够转换的pod,把nfs存储全部挂载到了它身上,然后,由它再给用户提供storageclass

 总结一下就是:

​ 1. 平时使用过程中,如果是静态的存储,那么过程是先准备好存储,然后基于存储创建PV;然后在创建PVC,根据容量他们会找对应的PV

​ 2. 使用动态存储,那么就是先准备好存储,然后直接创建PVC,storageclass会根据要求的大小自动创建PV

1、部署nfs

# yum -y install nfs-server
# yum -y install nfs-utils

　　修改/etc/exports文件

[root@k8s01-zongshuai nacos]# cat  /etc/exports
/data/nfs/v1  172.16.43.0/24(rw,no_root_squash,no_all_squash)
/data/nfs/v2  172.16.43.0/24(rw,no_root_squash,no_all_squash)
/data/nfs/v3  172.16.43.0/24(rw,no_root_squash,no_all_squash)

2、启动nfs-server和rpcbind

# systemctl start nfs-server rpcbind
# systemctl enable nfs-server rpcbind

 查看nfs是否就绪

# showmount -e

3、准备yaml文件

https://github.com/kubernetes-retired/external-storage/tree/master/nfs-client/deploy

（1）rbac.yaml 

apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: nfs-client
---
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: nfs-client
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-client
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-client
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    # replace with namespace where provisioner is deployed
    namespace: nfs-client
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

（2）class.yaml

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'
parameters:
  archiveOnDelete: "false"

（3）deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: nfs-client
spec:
  replicas: 1
  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: gcr.io/k8s-staging-sig-storage/nfs-subdir-external-provisioner:v4.0.0
          image: 172.16.43.156/nfs-client/nfs-client-provisioner:latest
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: k8s-sigs.io/nfs-subdir-external-provisioner
             # value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: 172.16.43.156
            - name: NFS_PATH
              value: /data/nfs/v1
      volumes:
        - name: nfs-client-root
          nfs:
            server: 172.16.43.156
            path: /data/nfs/v1

根据文件创建资源

# kubectl apply -f rbac.yaml
# kubectl apply -f deployment.yaml
# kubectl apply -f class.yaml

设置为默认sc

# kubectl patch sc managed-nfs-storage -p '{"metadata": {"annotations": {"storageclass.beta.kubernetes.io/is-default-class": "true"}}}'