nfs搭建

# 关闭防火墙
systemctl stop firewalld.service
systemctl disable firewalld.service
# 1.在线安装
yum -y install nfs-utils rpcbind
# 共享目录设置权限：
chmod 755 /data/k8s/
# 配置 nfs，nfs 的默认配置文件在 /etc/exports 文件下
vi /etc/exports
/data/k8s  *(rw,sync,no_root_squash)
​
#/data/k8s：是共享的数据目录
#*：表示任何人都有权限连接，当然也可以是一个网段，一个 IP，也可以是域名
#rw：读写的权限
#sync：表示文件同时写入硬盘和内存
#no_root_squash：当登录 NFS 主机使用共享目录的使用者是 root 时，其权限将被转换成为匿名使用者，通常它的 UID 与 GID，都会变成 nobody 身份
​
systemctl start rpcbind.service 
systemctl enable rpcbind.service 
systemctl status rpcbind.service 
systemctl start nfs.service    
systemctl enable nfs.service
systemctl status nfs.service
​
# 查看具体目录挂载权限：
cat /var/lib/nfs/etab
​
# 子节点查看
showmount -e slave1
​
#Export list for 10.151.30.57:
# /data/k8s *
# 在客户端上新建目录：
mkdir -p /data/k8s
#将 nfs 共享目录挂载到上面的目录：
mount -t nfs slave1:/data/k8s /data/k8s
 
# 客户端新建个文件测试
touch /data/k8s/hello.txt
​
# 2.离线安装
cd /home/nfs
​
# 安装nfs 需要提前把 包 准备好
rpm -ivh *.rpm --force --nodeps

pv和pvc入门

先来测试一下 nfs

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: 10.140.113.5:82/k3s/nginx
        volumeMounts:
        - name: wwwroot
          mountPath: /usr/local/nginx/html
        ports:
        - containerPort: 80
      volumes:
      - name: wwwroot
        nfs:
          server: 10.140.60.16
          path: /data/k8s

pv.yaml

apiVersion: v1
kind: PersistentVolume
metadata:
  name: my-pv
spec:
  capacity:
    storage: 5Gi
  accessModes:
    - ReadWriteOnce
  nfs:
    server: 10.140.60.16
    path: /data/k8s

pvc.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-dep1
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: 10.140.113.5:82/k3s/nginx
        volumeMounts:
        - name: wwwroot
          mountPath: /usr/share/nginx/html
        ports:
        - containerPort: 80
      volumes:
      - name: wwwroot
        persistentVolumeClaim:
          claimName: my-pvc
​
---
​
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: my-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi

注：这里的accessModes只能选用ReadWriteOnce，选用 ReadWriteMany 会报错