nfs文件系统

1.centos安装nfs-server

# 在每个机器。
yum install -y nfs-utils

# 在master 执行以下命令 
echo "/nfs/data/ *(insecure,rw,sync,no_root_squash)" > /etc/exports

echo "/nfs/data/ *(rw,sync,no_subtree_check)" > /etc/exports

# 执行以下命令，启动 nfs 服务;创建共享目录
mkdir -p /nfs/data

# 在master执行
systemctl enable rpcbind
systemctl enable nfs-server
systemctl start rpcbind
systemctl start nfs-server

# 使配置生效
exportfs -r

#检查配置是否生效
exportfs

ubuntu

sudo apt-get update
sudo apt-get install -y nfs-kernel-server

sudo mkdir -p /nfs/data
sudo chmod 777 /nfs/data

# 在master 执行以下命令 
echo "/nfs/data *(rw,sync,no_subtree_check)" > /etc/exports

sudo systemctl restart nfs-kernel-server
sudo systemctl enable nfs-kernel-server

sudo showmount -e localhost

apt install nfs-common -y
#1.写一个脚本到/etc/init.d/  名字叫nfs.sh
#!/bin/bash
# 在这里编写你的启动脚本命令
mount -t nfs 192.168.1.18:/nfs/data /nfs/data
#2.将脚本文件移动到 /etc/init.d/ 目录：使用以下命令将脚本文件移动到系统的启动脚本目录
sudo mv nfs.sh /etc/init.d/
#3.添加执行权限：使用以下命令为脚本文件添加执行权限。
sudo chmod +x /etc/init.d/myscript.sh
#4.更新启动脚本：运行以下命令以更新系统的启动脚本。
sudo update-rc.d nfs.sh defaults

额外补充删除开机自启动脚本

#运行以下命令以删除启动脚本：
sudo update-rc.d -f <script_name> remove

将 <script_name> 替换为你要删除的脚本文件的名称。

例如，如果要删除名为 myscript.sh 的脚本文件，运行以下命令：

sudo update-rc.d -f myscript.sh remove

验证脚本是否已成功删除：你可以使用以下命令检查脚本是否已从启动脚本中删除：

ls /etc/init.d/ | grep <script_name>

修改默认存储

kubectl edit storageclass 

2.配置nfs-client（选做）

showmount -e 172.31.0.4

mkdir -p /nfs/data

mount -t nfs 172.31.0.4:/nfs/data /nfs/data

3.配置默认存储nfs-storage

## 创建了一个存储类
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-storage
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
parameters:
  archiveOnDelete: "true"  ## 删除pv的时候，pv的内容是否要备份

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  # replace with namespace where provisioner is deployed
  namespace: default
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: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/nfs-subdir-external-provisioner:v4.0.2
          # resources:
          #    limits:
          #      cpu: 10m
          #    requests:
          #      cpu: 10m
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: k8s-sigs.io/nfs-subdir-external-provisioner
            - name: NFS_SERVER
              value: 172.31.0.4 ## 指定自己nfs服务器地址
            - name: NFS_PATH  
              value: /nfs/data  ## nfs服务器共享的目录
      volumes:
        - name: nfs-client-root
          nfs:
            server: 172.31.0.4
            path: /nfs/data
---
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: ["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: 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
  # replace with namespace where provisioner is deployed
  namespace: default
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

4.验证是否生效

kubectl get sc

5.从节点

showmount -e 172.31.0.4

#执行以下命令挂载 nfs 服务器上的共享目录到本机路径 /root/nfsmount
mkdir -p /nfs/data

mount -t nfs 172.31.0.4:/nfs/data /nfs/data
# 写入一个测试文件
echo "hello nfs server" > /nfs/data/test.txt